mirror of
https://github.com/schoebel/mars
synced 2024-12-14 02:35:14 +00:00
1927 lines
59 KiB
Perl
Executable File
1927 lines
59 KiB
Perl
Executable File
#!/usr/bin/perl -w
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# (c) 2010 Thomas Schoebel-Theuer / 1&1 Internet AG
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use strict;
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use English;
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use warnings;
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umask 0077;
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##################################################################
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# messaging
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my $error_count = 0;
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my $notify = "";
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sub lprint {
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my ($text) = @_;
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print $text;
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if ($notify) {
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system("/usr/bin/logger -t marsadm \"$notify $text\"");
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}
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}
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sub lprint_stderr {
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my ($text) = @_;
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print STDERR $text;
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if ($notify) {
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system("/usr/bin/logger -t marsadm \"$notify $text\"");
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}
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}
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sub ldie {
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my ($text) = @_;
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$error_count++;
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lprint_stderr "DYING: $text";
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die "\n";
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}
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sub lwarn {
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my ($text) = @_;
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lprint_stderr "WARNING: $text";
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}
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##################################################################
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# low-level infrastructure
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my @link_list = ();
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my %link_hash;
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my $verbose = 0;
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sub get_link {
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my ($path, $unchecked) = @_;
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my $result = readlink($path);
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if (!defined($result)) {
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ldie "cannot read symlink '$path'\n" unless $unchecked;
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lwarn "cannot read symlink '$path'\n" if $unchecked == 1;
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}
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return $result;
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}
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sub is_link_recent {
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my ($path) = @_;
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my @stat = lstat($path);
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return 0 if (!@stat);
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return 1 if $stat[9] + 15 >= mars_time();
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return 0;
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}
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sub to_tmp {
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my $path = shift;
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$path =~ s:^(.*)/:$1/.tmp.:;
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return $path;
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}
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sub from_tmp {
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my $path = shift;
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$path =~ s:^(.*)/\.tmp\.:$1/:;
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return $path;
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}
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sub set_link {
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my ($src, $dst) = @_;
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my $dst_tmp = to_tmp($dst);
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unlink($dst_tmp);
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symlink($src, $dst_tmp) or ldie "cannot create symlink '$dst' -> '$src'\n";
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# the _order_ is important! remove existing intermediate element before re-appanding
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if (exists($link_hash{$dst})) {
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my @copy = @link_list;
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@link_list = ();
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foreach my $elem (@copy) {
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next if $elem eq $dst;
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push @link_list, $elem;
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}
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}
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$link_hash{$dst} = $src;
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push @link_list, $dst;
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}
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sub finish_links {
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return unless @link_list;
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my $timestamp = mars_time();
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lprint "using lamport timestamp $timestamp\n" if $verbose;
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while (my $link = shift @link_list) {
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my $link_tmp = to_tmp($link);
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my $target = readlink($link_tmp);
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my $this_timestamp = $timestamp;
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# allow overriding of secondaries in partitioned clusters by use of small timestamps
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if ($target eq "(none)") {
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my @stat = lstat($link);
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$this_timestamp = $stat[9] + 1 if @stat;
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}
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system("touch -h -d \"\@$this_timestamp\" $link_tmp") == 0 or ldie "cannot set mtime on symlink '$link_tmp'\n";
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rename($link_tmp, $link) or ldie "cannot finalize symlink '$link'\n";
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if ($verbose) {
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lprint "created symlink '$link' -> '$target'\n";
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}
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}
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_trigger();
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}
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##################################################################
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# global variables and checks
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my $Id = '$Id$ ';
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my $user_version = 0.1;
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my $mars = "/mars";
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my $host = `uname -n` or ldie "cannot determine my network node name\n";
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chomp $host;
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my $force = 0;
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my $timeout = -1;
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my $ip = _get_ip() or ldie "cannot determine my IP address\n";
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my $kernel_version = 0;
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unless ($ARGV[0] =~ m/cluster|cat/) {
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$kernel_version = get_link("$mars/tree-$host", 1);
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if ($kernel_version && $user_version != $kernel_version) {
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lwarn "kernel_version=$kernel_version user_version=$user_version\n";
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if ($user_version < $kernel_version) {
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ldie "Sorry, your MARS kernel module uses version $kernel_version, but my $0 userspace version is only $user_version. That cannot work. Please upgrade your userspace scripts!\n";
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} elsif (int($user_version) > int($kernel_version) + 1) {
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ldie "MAJOR VERSION mismatch : only one major upgrade step is supported.\n";
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}
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lwarn "using different minor versions is possible, but you should upgrade your kernel module ASAP\n";
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}
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}
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sub get_alive_links {
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my $res = shift || "all";
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my $alive = shift || "alive";
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my $glob = "$mars/$alive-*";
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if ($res ne "all") {
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$glob = "$mars/$alive-{";
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my $count = 0;
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foreach my $peer (glob("$mars/resource-$res/data-*")) {
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$peer =~ m:/data-(.+):;
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$glob .= "," if $count++;
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$glob .= $1;
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}
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$glob .= "}";
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}
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my %links;
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foreach my $path (glob($glob)) {
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$path =~ m:/$alive-(.+):;
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my $peer = $1;
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$links{$peer} = get_link($path);
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}
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return %links;
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}
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##################################################################
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# timeout handling
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#
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# return the lamport clock time in nanosecond resolution
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# fallback to system time()
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#
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sub mars_time {
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my $lamport_time;
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if (open(my $lamport_clock, "<", "/proc/sys/mars/lamport_clock")) {
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while (<$lamport_clock>) {
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$lamport_time = $1 if /^lamport_now=(.*)/;
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}
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close($lamport_clock);
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}
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return $lamport_time || time() . "." . '0' x 9;
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}
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sub sleep_timeout {
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my $sleeptime = shift || 5;
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if ($timeout < 0) {
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sleep($sleeptime);
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return;
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}
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ldie "Timeout reached. You may retry with --timeout=-1 to ensure waiting until progress is possible.\n" if !$timeout;
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my $rest = $timeout;
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$rest = $sleeptime if $rest > $sleeptime;
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sleep($rest);
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$timeout -= $rest;
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}
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# wait for some condition
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sub wait_cond {
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my ($cmd, $res, $specific) = @_;
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my $is_actual = ($specific =~ s/^(is|has)-//);
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my $is_on = !($specific =~ s/-off$//);
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$specific =~ s/-on$//;
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if ($is_actual) {
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if ($specific eq "device") {
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check_mars_device($cmd, $res, 1, !$is_on);
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return;
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}
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my %table =
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(
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"attach" => "is-attached",
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"attached" => "is-attached",
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"replay" => "is-replaying",
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"replaying"=> "is-replaying",
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"copy" => "is-copying",
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"copying" => "is-copying",
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"sync" => "is-syncing",
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"syncing" => "is-syncing",
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"primary" => "is-primary",
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);
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my $name = $table{$specific};
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ldie "actual indicator '$specific' does not exist\n" unless exists($table{$specific});
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check_status($cmd, $res, $name, $is_on ? 1 : 0, 1);
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} else {
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my %table =
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(
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"attach" => "attach",
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"attached" => "attach",
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"connect" => "connect",
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"replay" => "allow-replay",
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"sync" => "sync",
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);
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my $name = $table{$specific};
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ldie "button '$specific' does not exist\n" unless exists($table{$specific});
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check_todo($cmd, $res, $name, $is_on ? 1 : 0, 1);
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}
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}
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# wait until some communication has occurred
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sub wait_cluster {
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return wait_cond(@_) if int(@_) >= 3;
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my $cmd = shift;
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my $res = shift || "all";
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my $start_time = mars_time();
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_trigger();
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my $delta = $timeout > 0 ? $timeout : 30;
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while (1) {
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my $dead_count = 0;
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my $alive_count = 0;
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my $unknown_count = 0;
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my %status = get_alive_links($res, "time");
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my $now = mars_time();
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foreach my $peer (keys(%status)) {
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next if $peer eq $host;
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if ($status{$peer} >= $start_time) {
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$alive_count++;
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} elsif ($status{$peer} + $delta < $now) {
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$dead_count++;
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} else {
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$unknown_count++;
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}
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}
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if (!$dead_count && !$unknown_count) {
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lprint "all $alive_count peer(s) seem to be alive\n";
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last;
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}
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if (!$unknown_count) {
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lwarn "$alive_count peer(s) seem to be alive, and $dead_count peer(s) seem to be dead / not reachable\n";
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ldie "--force not given\n" unless $force;
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last;
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}
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sleep(1);
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}
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}
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##################################################################
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# syntactic checks
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sub check_id {
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my $str = shift;
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ldie "identifier '$str' has disallowed characters" unless $str =~ m/^[A-Za-z_][-A-Za-z0-9_]*$/;
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ldie "identifier '$str' is too long (only 16 chars allowed)" if length($str) > 16;
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}
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##################################################################
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# semantic checks
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sub check_res {
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my $res = shift;
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if (not -d "$mars/resource-$res") {
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# DO WHAT I MEAN: try to substitute a device name for a badly given resource name if it is unique
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my $count = 0;
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my $found;
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my @tests = glob("$mars/resource-*/device-$host");
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foreach my $test (@tests) {
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my $target = get_link($test, 2);
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if ($target eq $res) {
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$found = $test;
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$count++;
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}
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}
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if (!$count) {
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@tests = glob("$mars/resource-*/_direct-*-$host");
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foreach my $test (@tests) {
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my $target = get_link($test, 2);
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$target =~ s/^.*,//;
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if ($target eq $res) {
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$found = $test;
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$count++;
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}
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}
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}
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ldie "resource '$res' does not exist ($count replacements found)\n" unless $count == 1 and $found;
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$found =~ s:^.*/resource-(.*)/.*$:$1:;
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lwarn "substituting bad resource name '$res' by uniquely matching resource name '$found'\n";
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$res = $found;
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}
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return $res;
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}
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sub check_sizes {
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my ($res, $host) = @_;
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my $logical_size = get_link("$mars/resource-$res/size");
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my $physical_size = get_link("$mars/resource-$res/actsize-$host", 1);
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if (defined($physical_size) && $physical_size < $logical_size) {
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ldie "physical device on host '$host' has size $physical_size, which is smaller than the logical resource size $logical_size\n";
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}
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}
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sub check_res_member {
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my $res = shift;
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ldie "sorry, I have not yet joined to resource '$res'\n" unless -e "$mars/resource-$res/data-$host";
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check_sizes($res, $host);
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}
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sub check_sync_finished {
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my ($res, $host) = @_;
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check_sizes(@_);
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my $lnk = "$mars/resource-$res/syncstatus-$host";
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if (lstat($lnk)) {
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my $syncstatus = get_link($lnk, 1);
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my $size = get_link("$mars/resource-$res/size");
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ldie "sync has not yet finished, only $syncstatus / $size bytes transferred\n" unless $syncstatus >= $size;
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}
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lprint "OK, it seems that sync has finished on $host.\n";
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}
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sub check_primary {
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my ($cmd, $res) = @_;
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my $lnk = "$mars/resource-$res/actual-$host/is-primary";
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my $is_primary = get_link($lnk);
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if (!$is_primary) { # give it a second chance
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my $name = get_link("$mars/resource-$res/device-$host");
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my $dev = "/dev/mars/$name";
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$is_primary = 1 if -b $dev;
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}
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ldie "for operation '$cmd' I need to be primary\n" unless $is_primary;
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my $primary = _get_designated_primary($res);
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ldie "for operation '$cmd', I also must be the designated primary\n" unless $primary eq $host;
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}
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sub check_not_primary {
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my ($cmd, $res) = @_;
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my $lnk = "$mars/resource-$res/actual-$host/is-primary";
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my $is_primary = get_link($lnk);
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if ($is_primary) {
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ldie "operation '$cmd' cannot be executed on primary\n";
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}
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# also check whether we intend to become primary
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my $primary = _get_designated_primary($res);
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ldie "operation '$cmd' cannot be executed on designated primary\n" if $primary eq $host;
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}
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sub check_primary_gone {
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my ($res) = @_;
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for (;;) {
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my $pri = _get_actual_primary($res);
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last if !$pri;
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last if $pri eq $host;
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lprint "waiting for other primary host ($pri) to disappear....\n";
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sleep_timeout();
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}
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}
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sub check_todo {
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my ($cmd, $res, $key, $val, $wait, $unchecked, $inv) = @_;
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my $path = "$mars/resource-$res/todo-$host/$key";
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my $link;
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for (;;) {
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$link = get_link($path, $unchecked);
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return unless defined($link);
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if (defined($inv) && $inv) {
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last if $link != $val;
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ldie "cannot execute $cmd: switch '$key' must not have value '$val'\n" if !$wait;
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lprint "waiting until switch '$key' leaves the value '$val'....\n";
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} else {
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last if $link == $val;
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ldie "cannot execute $cmd: switch '$key' must have value '$val', but actually has value '$link'\n" if !$wait;
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lprint "waiting until switch '$key' reaches the value '$val'....\n";
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}
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sleep_timeout();
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}
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lprint "OK, '$path' has acceptable value '$link'\n";
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}
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sub check_status {
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my ($cmd, $res, $key, $val, $wait, $unchecked, $inv) = @_;
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my $path = "$mars/resource-$res/actual-$host/$key";
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my $link;
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for (;;) {
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$link = get_link($path, $unchecked);
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return unless defined($link);
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if (defined($inv) && $inv) {
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last if $link != $val;
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ldie "cannot execute $cmd: '$path' must not have value '$val'\n" if !$wait;
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lprint "waiting until '$key' leaves the value '$val'...\n";
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} else {
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last if $link == $val;
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ldie "cannot execute $cmd: '$path' must have value '$val'\n" if !$wait;
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lprint "waiting until '$key' reaches the value '$val'...\n";
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}
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sleep_timeout();
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}
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lprint "OK, '$path' has acceptable value '$link'\n";
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}
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sub check_mars_device {
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my ($cmd, $res, $wait, $inv) = @_;
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my $name = get_link("$mars/resource-$res/device-$host");
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my $dev = "/dev/mars/$name";
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my $backoff = 1;
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my $round = 0;
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if ($inv) {
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while (-b $dev) {
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ldie "cannot execute $cmd: device '$dev' has not yet disappeared\n" if !$wait;
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lwarn "device '$dev' has not yet disappeared\n";
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sleep_timeout($backoff);
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# very slowly increasing backoff
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if ($backoff < 10 && $round++ > 5) {
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$round = 0;
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$backoff++;
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}
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}
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lprint "device '$dev' is no longer present\n" unless -b $dev;
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return;
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}
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# !$inv
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my $primary = _get_designated_primary($res);
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ldie "for operation '$cmd', I should be the designated primary\n" unless $primary eq $host;
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while (! -e $dev) {
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my $text = get_error_text($cmd, $res);
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lprint $text if $text;
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ldie "aborting due to errors\n" if $text =~ m/error/mi;
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ldie "cannot execute $cmd: device '$dev' not yet present\n" if !$wait;
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lprint "device '$dev' not yet present\n";
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sleep_timeout($backoff);
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# very slowly increasing backoff
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if ($backoff < 10 && $round++ > 5) {
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$round = 0;
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$backoff++;
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}
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}
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lprint "device '$dev' is present\n" if -b $dev;
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}
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sub check_userspace {
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my ($dst) = @_;
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if ($dst !~ m:/userspace/:) {
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ldie "your path '$dst' must be inside $mars/userspace/ or $mars/resource-*/userspace/\n" unless $force;
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lwarn "your path '$dst' is outside $mars/userspace/ or $mars/resource-*/userspace/ and you gave --force, hopefully YOU KNOW WHAT YOU ARE DOING\n";
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}
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}
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##################################################################
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# state inspection routines
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sub _get_minmax {
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my ($res, $glob, $take_symlink) = @_;
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my $min = -1;
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my $max = -1;
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my @paths = glob($glob) or ldie "cannot find '$glob'\n";
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foreach my $path (@paths) {
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my $nr = $path;
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if ($take_symlink) {
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$nr = get_link($path);
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}
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$nr =~ s:^.*[a-z]+-([0-9]+)(-[^/]*)?$:$1:;
|
|
$min = $nr if ($nr < $min || $min < 0);
|
|
$max = $nr if ($nr > $max || $max < 0);
|
|
}
|
|
return ($min, $max);
|
|
}
|
|
|
|
sub get_minmax_logfiles {
|
|
my ($res) = @_;
|
|
return _get_minmax($res, "$mars/resource-$res/log-*", 0);
|
|
}
|
|
|
|
sub get_minmax_versions {
|
|
my ($res) = @_;
|
|
return _get_minmax($res, "$mars/resource-$res/version-*", 0);
|
|
}
|
|
|
|
sub get_minmax_any {
|
|
my ($res) = @_;
|
|
return _get_minmax($res, "$mars/resource-$res/{log,version}-*", 0);
|
|
}
|
|
|
|
sub get_minmax_replays {
|
|
my ($res) = @_;
|
|
return _get_minmax($res, "$mars/resource-$res/replay-*", 1);
|
|
}
|
|
|
|
sub _parse_pos {
|
|
my ($pos) = @_;
|
|
$pos =~ m/(log-([0-9]+)-([^,]+),([0-9]+))/;
|
|
return ($1, int($2), $3, int($4));
|
|
}
|
|
|
|
sub _get_prev_pos {
|
|
my ($basedir, $nr, $host) = @_;
|
|
my $path = sprintf("$basedir/version-%09d-$host", $nr);
|
|
my $vers = get_link($path, 1);
|
|
$vers =~ s/^.*://;
|
|
return $vers;
|
|
}
|
|
|
|
sub _get_common_ancestor {
|
|
# TODO: recursive formulation, improve efficiency
|
|
my ($basedir, $pos1, $host1, $dep1, $pos2, $host2, $dep2) = @_;
|
|
my ($p1, $nr1, $from1, $len1) = _parse_pos($pos1);
|
|
my ($p2, $nr2, $from2, $len2) = _parse_pos($pos2);
|
|
if ($p1 eq $p2) {
|
|
# usually no split brain here (only if both path depths are non-zero)
|
|
my $split = ($dep1 && $dep2);
|
|
if (!$split) { # additionally check the corresponding version links
|
|
my $path1 = sprintf("$basedir/version-%09d-$from1", $nr1);
|
|
my $path2 = sprintf("$basedir/version-%09d-$from2", $nr2);
|
|
if (my $vers1 = get_link($path1) and my $vers2 = get_link($path2)) {
|
|
$split = 1 if $vers1 ne $vers2;
|
|
}
|
|
}
|
|
return ($p1, $split);
|
|
} elsif ($nr1 > $nr2) {
|
|
# just flip arguments
|
|
return _get_common_ancestor($basedir, $pos2, $host2, $dep2, $pos1, $host1, $dep1);
|
|
} elsif ($nr1 < $nr2) {
|
|
# recursively advance path depth
|
|
my $vers2 = _get_prev_pos($basedir, $nr2, $host2);
|
|
return ("", -1) if !$vers2;
|
|
return _get_common_ancestor($basedir, $pos1, $host1, $dep1, $vers2, $host2, $dep2 + 1);
|
|
} elsif ($from1 ne $from2) {
|
|
# split brain is sure now, but continue computing the common split point
|
|
my $vers1 = _get_prev_pos($basedir, $nr1, $host1);
|
|
return ("", 1) if !$vers1;
|
|
my $vers2 = _get_prev_pos($basedir, $nr2, $host2);
|
|
return ("", 1) if !$vers2;
|
|
my ($res, $split) = _get_common_ancestor($basedir, $vers1, $host1, $dep1 + 1, $vers2, $host2, $dep2 + 1);
|
|
return ($res, 1);
|
|
} elsif ($len1 < $len2) {
|
|
# there may be no split brain (just incomplete replay) depending on path depth
|
|
return ($p1, $dep1);
|
|
} elsif ($len2 < $len1) {
|
|
# dto symmetric
|
|
return ($p2, $dep2);
|
|
}
|
|
lwarn "error in algorithm: $p1, $nr1, $from1, $len1 : $p2, $nr2, $from2, $len2\n";
|
|
return ("", -1);
|
|
}
|
|
|
|
sub get_common_ancestor {
|
|
my ($basedir, $host1, $host2) = @_;
|
|
my $repl1 = get_link("$basedir/replay-$host1", 1);
|
|
my $repl2 = get_link("$basedir/replay-$host2", 1);
|
|
return _get_common_ancestor($basedir, $repl1, $host1, 0, $repl2, $host2, 0);
|
|
}
|
|
|
|
sub detect_splitbrain {
|
|
my ($res, $do_report) = @_;
|
|
my $basedir = "$mars/resource-$res";
|
|
my $ok = 1;
|
|
my @list = glob("$mars/resource-$res/replay-*");
|
|
my @hosts = map { $_ =~ s:.*/replay-::; $_ } @list;
|
|
foreach my $host1 (@hosts) {
|
|
foreach my $host2 (@hosts) {
|
|
next if $host1 ge $host2;
|
|
my ($res, $split) = get_common_ancestor($basedir, $host1, $host2);
|
|
if ($split) {
|
|
$ok = 0;
|
|
if ($do_report) {
|
|
lwarn "SPLIT BRAIN at '$res' detected: hostA = '$host1', hostB = '$host2'\n";
|
|
} else {
|
|
return $ok;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return $ok;
|
|
}
|
|
|
|
sub try_to_avoid_splitbrain {
|
|
my ($cmd, $res) = @_;
|
|
my ($min, $max) = get_minmax_versions($res);
|
|
my @host_list = glob("$mars/resource-$res/replay-*");
|
|
return if scalar(@host_list) < 2;
|
|
my $vers_glob = sprintf("$mars/resource-$res/version-%09d-*", $max);
|
|
for (;;) {
|
|
my $ok = 1;
|
|
my @versions = glob($vers_glob);
|
|
my $first = get_link(shift @versions);
|
|
while (@versions) {
|
|
my $next = get_link(shift @versions);
|
|
if ($next ne $first) {
|
|
$ok = 0;
|
|
}
|
|
}
|
|
last if $ok;
|
|
lprint "trying to avoid split brain: logfile update not yet completed.\n";
|
|
sleep_timeout();
|
|
}
|
|
}
|
|
|
|
sub get_size {
|
|
my $arg = shift || "";
|
|
if (!($arg =~ m/^([0-9]+(?:\.[0-9]*)?)([kmgtp]?)$/i)) {
|
|
ldie "size argument '$arg' must be a number, optionally followed by suffix k or m or g or t or p\n";
|
|
}
|
|
my $mod = $2 || "";
|
|
$arg = $1;
|
|
$_ = $mod;
|
|
SWITCH: {
|
|
/k/i and $arg *= 1024, last SWITCH;
|
|
/m/i and $arg *= 1024 * 1024, last SWITCH;
|
|
/g/i and $arg *= 1024 * 1024 * 1024, last SWITCH;
|
|
/t/i and $arg *= 1024 * 1024 * 1024 * 1024, last SWITCH;
|
|
/p/i and $arg *= 1024 * 1024 * 1024 * 1024 * 1024, last SWITCH;
|
|
}
|
|
ldie "size '$arg' is not a multiple of 4k\n" if ($arg % 4096) != 0;
|
|
return $arg;
|
|
}
|
|
|
|
#
|
|
# Get actual primary node from links below actual-*/ subdirs
|
|
#
|
|
sub _get_actual_primary {
|
|
my ($res) = @_;
|
|
my @primary_links = glob("$mars/resource-$res/actual-*/is-primary");
|
|
my $primary;
|
|
foreach my $link (@primary_links) {
|
|
if (my $val = get_link($link)) {
|
|
$primary = ($link =~ qr%.*actual-([^/]+)/is-primary%)[0];
|
|
last;
|
|
# Note: if there are more than one 'is-primary' links (an insane state anyway),
|
|
# the first 'is-primary' link is selected. Other links are ignored.
|
|
}
|
|
}
|
|
return $primary;
|
|
}
|
|
|
|
sub _get_designated_primary {
|
|
my ($res) = @_;
|
|
return get_link("$mars/resource-$res/primary");
|
|
}
|
|
|
|
sub get_peers {
|
|
my ($res) = @_;
|
|
my @list = glob("$mars/resource-$res/data-*");
|
|
return map { $_ =~ s:$mars/resource-$res/data-::; $_ } @list;
|
|
}
|
|
|
|
sub __conv_tv {
|
|
my ($tv_sec, $tv_nsec) = @_;
|
|
my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = localtime(int($tv_sec));
|
|
return "$tv_sec.$tv_nsec" unless defined($sec);
|
|
return sprintf("%04d-%02d-%02d %02d:%02d:%02d.%s", $year+1900, $mon + 1, $mday, $hour, $min, $sec, $tv_nsec);
|
|
}
|
|
|
|
sub _replace_timestamps {
|
|
my ($txt) = @_;
|
|
$txt =~ s:([0-9]{9,99})\.([0-9]{9}):__conv_tv($1,$2):ge;
|
|
return $txt;
|
|
}
|
|
|
|
sub _get_text {
|
|
my ($path, $regex, $do_print) = @_;
|
|
open(IN, "<", $path) or return "";
|
|
my $text = "";
|
|
my $count = 0;
|
|
while (my $line = <IN>) {
|
|
# use regex e.g. for fetching only errors and warnings
|
|
if (!$regex || $line =~ $regex) {
|
|
$line = _replace_timestamps($line);
|
|
$count++;
|
|
if ($do_print) {
|
|
print $line;
|
|
} else {
|
|
$text .= $line;
|
|
}
|
|
}
|
|
}
|
|
close(IN);
|
|
return $count if $do_print;
|
|
return $text;
|
|
}
|
|
|
|
sub get_error_text {
|
|
my ($cmd, $res) = @_;
|
|
my $text = _get_text("$mars/resource-$res/logstatus-$host.status", "m/^(err|warn)/i", 0);
|
|
return $text;
|
|
}
|
|
|
|
##################################################################
|
|
|
|
# helpers
|
|
|
|
sub _trigger {
|
|
system("(echo 2 > /proc/sys/mars/trigger) >/dev/null 2>&1");
|
|
}
|
|
|
|
sub _switch {
|
|
my ($cmd, $res, $path, $on) = @_;
|
|
my $src = $on ? "1" : "0";
|
|
|
|
my $old = get_link($path);
|
|
if ($old && $old eq $src) {
|
|
lprint "${cmd} on resource $res is already activated\n" if $cmd;
|
|
return;
|
|
}
|
|
set_link($src, $path);
|
|
lprint "successfully started ${cmd} on resource $res\n" if $cmd;
|
|
}
|
|
|
|
sub _writable {
|
|
my ($path, $on) = @_;
|
|
my $oldmode = (lstat $path)[2] & 0700;
|
|
my $newmode = $on ? $oldmode | 0200 : $oldmode & ~0200;
|
|
lprint "chmod '$path' $oldmode $newmode";
|
|
chmod($newmode, $path) == 1 or ldie "cannot chmod '$path'\n";
|
|
}
|
|
|
|
sub _get_ip {
|
|
chomp (my @info = `/sbin/ip addr show dev eth0`);
|
|
foreach (@info) {
|
|
m#\sinet\s(\d+\.\d+\.\d+\.\d+)# && return $1;
|
|
}
|
|
return undef;
|
|
}
|
|
|
|
sub _fake_versionlink {
|
|
my ($basedir, $log_nr, $primary) = @_;
|
|
my $new_version = sprintf("$basedir/version-%09d-$host", $log_nr);
|
|
my $pri_version = sprintf("$basedir/version-%09d-$primary", $log_nr);
|
|
if ($primary eq $host) {
|
|
ldie "Cannot fake my own version link '$new_version'\n";
|
|
}
|
|
my $pri_link = get_link($pri_version);
|
|
if (!$pri_link) { # try any one else
|
|
lwarn "cannot read symlink '$pri_version' -- trying a neighbor link instead\n";
|
|
my $try_version = sprintf("$basedir/version-%09d-*", $log_nr);
|
|
my @test = glob($try_version);
|
|
my $test_version = shift @test;
|
|
if ($test_version) {
|
|
lwarn "trying substitute symlink '$test_version'\n";
|
|
my $test_link = get_link($test_version);
|
|
if ($test_link) {
|
|
$pri_link = $test_link;
|
|
lwarn "got value '$pri_link', hopefully this is right\n" if $pri_link;
|
|
}
|
|
}
|
|
}
|
|
if ($pri_link) {
|
|
lprint "creating new version symlink '$new_version' -> '$pri_link'\n";
|
|
set_link($pri_link, $new_version);
|
|
} else {
|
|
lwarn "cannot read symlink '$pri_version' -- cannot create faked versionlink '$pri_version'\n";
|
|
}
|
|
}
|
|
|
|
sub _set_replaylink {
|
|
my ($basedir, $log_nr, $primary, $msg) = @_;
|
|
$msg = " -- THIS IS EXTREMELY RISKY -- any inconsistencies are on your own!" unless defined($msg);
|
|
ldie "no designated primary defined\n" unless ($primary && $primary ne "(none)");
|
|
my $rep_path = "$basedir/replay-$host";
|
|
my $rep_val = sprintf("log-%09d-$primary,0,0", $log_nr);
|
|
lprint "creating new replaylink '$rep_path' -> '$rep_val'\n";
|
|
set_link($rep_val, $rep_path);
|
|
|
|
if ($log_nr > 1) {
|
|
_fake_versionlink($basedir, $log_nr - 1, $primary);
|
|
} else {
|
|
my $initial;
|
|
for (;;) {
|
|
$initial = get_link("$basedir/version-000000001-$primary", 1);
|
|
last if $initial;
|
|
sleep_timeout();
|
|
}
|
|
set_link($initial, "$basedir/version-000000001-$host");
|
|
}
|
|
set_link("$log_nr$msg", "$basedir/skip-check-$host");
|
|
}
|
|
|
|
##################################################################
|
|
|
|
# commands
|
|
|
|
sub ignore_cmd {
|
|
my ($cmd, $res) = @_;
|
|
lprint "ignoring command '$cmd' on resource '$res'\n";
|
|
}
|
|
|
|
sub senseless_cmd {
|
|
my ($cmd, $res) = @_;
|
|
lprint "command '$cmd' makes no sense with MARS (ignoring on resource '$res')\n";
|
|
}
|
|
|
|
sub forbidden_cmd {
|
|
my ($cmd, $res) = @_;
|
|
ldie "command '$cmd' on resource '$res' cannot be used with MARS (migth affect too many hosts, lead to undesired consequences)\n";
|
|
}
|
|
|
|
sub nyi_cmd {
|
|
my ($cmd, $res) = @_;
|
|
ldie "command '$cmd' on resource '$res' is not yet implemented\n";
|
|
}
|
|
|
|
sub is_module_loaded {
|
|
open TEST, "lsmod | grep mars |";
|
|
my $res = <TEST>;
|
|
close TEST;
|
|
return $res;
|
|
}
|
|
|
|
sub set_link_cmd {
|
|
my $cmd = shift;
|
|
for (;;) {
|
|
my $src = shift || last;
|
|
my $dst = shift || ldie "you did not supply a symlink destination for source '$src'\n";
|
|
ldie "symlink target '$dst' is not an absolute path\n" unless $dst =~ m:^/:;
|
|
check_userspace($dst);
|
|
my $dir = `dirname "$dst"` or ldie "path '$dst' has no dirname\n";
|
|
chomp $dir;
|
|
ldie "directory '$dir' does not exist\n" unless -d $dir;
|
|
set_link($src, $dst);
|
|
}
|
|
}
|
|
|
|
sub _create_cluster {
|
|
my ($cmd) = @_;
|
|
system("mkdir $mars") unless -d $mars;
|
|
my $old_uuid = get_link("$mars/uuid", 2);
|
|
if ($cmd eq "create-cluster") {
|
|
ldie "cluster was already created with uuid='$old_uuid'\n" if $old_uuid && !$force;
|
|
my $uuid = `echo -n \$(hostname) \$(date)`;
|
|
set_link($uuid, "$mars/uuid");
|
|
finish_links(); # opportunity for errors => don't continue
|
|
} elsif (!$old_uuid && !$force) {
|
|
if ($user_version == 0.1) {
|
|
my $uuid = `echo -n \$(hostname) \$(date)`;
|
|
set_link($uuid, "$mars/uuid");
|
|
}
|
|
ldie "cluster has no uuid\n" if $user_version > 0.1;
|
|
}
|
|
system("mkdir $mars/ips") unless -d "$mars/ips";
|
|
system("mkdir $mars/userspace") unless -d "$mars/userspace";
|
|
system("mkdir $mars/defaults") unless -d "$mars/defaults";
|
|
system("mkdir $mars/defaults-$host") unless -d "$mars/defaults-$host";
|
|
system("mkdir $mars/todo-global") unless -d "$mars/todo-global";
|
|
set_link($ip, "$mars/ips/ip-$host");
|
|
set_link("1", "$mars/todo-global/deleted-$host");
|
|
}
|
|
|
|
sub create_cluster {
|
|
my ($cmd, $peer) = @_;
|
|
ldie "cluster is already created\n" if !$force && -d "$mars/ips";
|
|
ldie "mars module is loaded, please unload first\n" if is_module_loaded();
|
|
_create_cluster(@_);
|
|
}
|
|
|
|
sub join_cluster {
|
|
my ($cmd, $peer) = @_;
|
|
if (glob("$mars/resource-*") or glob("$mars/ips/*")) {
|
|
ldie "Sorry, some resources already exist!\nThis is dangerous!\nIf you are sure that no resource clash is possible, re-invoke this command with '--force' option\n" unless $force;
|
|
}
|
|
ldie "mars module is loaded, please unload first\n" if is_module_loaded();
|
|
lprint "joining cluster via rsync (peer='$peer')\n";
|
|
# check connection
|
|
system("ssh $peer uname -a") == 0 or ldie "oops, no connection to $peer ...\n";
|
|
mkdir($mars) unless -d $mars;
|
|
system("rsync --recursive --links --max-size=1 -v $peer:$mars/ $mars/") == 0 or ldie "cannot get remote symlink tree via rsync\n";
|
|
_create_cluster(@_);
|
|
finish_links();
|
|
system("rsync --recursive --links -v $mars/ips/ $peer:$mars/ips/") == 0 or ldie "oops\n";
|
|
}
|
|
|
|
sub leave_cluster {
|
|
my ($cmd) = @_;
|
|
my $check = "/mars/resource-*/*-$host";
|
|
ldie "I am member of some resources\n" if glob($check) && !$force;
|
|
_create_delete("$mars/ips/$host");
|
|
}
|
|
|
|
sub create_res {
|
|
my ($cmd, $res, $dev, $appear, $size_arg) = @_;
|
|
my $create = ($cmd eq "create-resource");
|
|
|
|
ldie "undefined device or size argument\n" unless $dev;
|
|
$appear = $res if !$appear;
|
|
check_id($appear) if $appear;
|
|
|
|
my $resdir = "$mars/resource-$res";
|
|
if ($create) {
|
|
ldie "resource directory '$res' already exists; you may override this via --force\n" if (!$force && -d $resdir);
|
|
ldie "resource directory '$res' has some contents -- remove by hand if you are sure that you really know what you are doing, or give --force.\n" if (!$force && glob("$resdir/*.status"));
|
|
lprint "creating new resource '$res'\n";
|
|
} else {
|
|
if ( -e "$resdir/data-$host") {
|
|
lwarn "resource '$res' has been already joined -- this is dangerous!\n";
|
|
ldie "refusing dangerous operation\n" unless $force;
|
|
} else {
|
|
lprint "joining to existing resource '$res'\n";
|
|
}
|
|
}
|
|
|
|
my $size = 0;
|
|
if (-b $dev) {
|
|
ldie "block device '$dev' must be an absolute path starting with '/'\n" unless $dev =~ m/^\//;
|
|
use Fcntl 'SEEK_END', 'O_RDONLY', 'O_RDWR', 'O_EXCL';
|
|
my $flags = O_RDWR | O_EXCL;
|
|
if ($force) {
|
|
$flags = O_RDONLY;
|
|
}
|
|
sysopen(TEST, $dev, $flags) or ldie "cannot open device '$dev' for exclusive rw access\n";
|
|
$size = sysseek(TEST, 0, SEEK_END);
|
|
close(TEST);
|
|
lprint "block device '$dev': determined size = $size bytes\n";
|
|
if ($size_arg) {
|
|
my $new_size = get_size($size_arg);
|
|
ldie "size argument '$size_arg' is smaller than device size '$size'\n" unless $new_size <= $size;
|
|
lprint "reducing size from $size to $new_size\n";
|
|
$size = $new_size;
|
|
}
|
|
} else {
|
|
$size = get_size($dev);
|
|
if ($size > 0) {
|
|
$dev = "";
|
|
} else {
|
|
ldie "bad parameter '$dev': must be either a block device name, or size followed by k or m or g or t\n";
|
|
}
|
|
}
|
|
|
|
ldie "implausible size $size" unless $size > 4096 * 16; # smaller floppies should not exist ;)
|
|
|
|
my $primary;
|
|
my $replay_nr = -1;
|
|
if ($create) {
|
|
mkdir($resdir);
|
|
ldie "could not create resource '$res'\n" unless -d $resdir;
|
|
set_link($size, "$resdir/size");
|
|
} else { # join
|
|
ldie "resource '$res' does not exist\n" unless -d $resdir;
|
|
my $res_size = get_link("$mars/resource-$res/size");
|
|
if ($size < $res_size) {
|
|
lwarn "size of new device is only $size, but should be $res_size\n";
|
|
ldie "refusing to join due to bad size\n" unless $force;
|
|
} elsif ($size > $res_size) {
|
|
lprint "Your physical device has size $size, which is larger than the logical resource size $res_size.\n";
|
|
lprint "This does no harm, but you are wasting some space.\n";
|
|
}
|
|
$primary = _get_designated_primary($res);
|
|
ldie "Sorry, joining is only possible if a designated primary exists.\n" if $primary eq "(none)";
|
|
ldie "implausible state: I ($host) am already designated primary of resource '$res' which I just wanted to join\n" if $primary eq $host;
|
|
ldie "my ip '$ip' is not registered -- please run 'join-cluster' first\n" unless -l "$mars/ips/ip-$host";
|
|
my $replay = get_link("$resdir/replay-$primary");
|
|
if ($replay =~ m/^log-([0-9]+)-/) {
|
|
$replay_nr = $1;
|
|
} else {
|
|
ldie "cannot determine current logfile number.\n";
|
|
}
|
|
}
|
|
|
|
# check for uniqeness of $appear
|
|
if ($appear) {
|
|
foreach my $old_dev (glob("$mars/resource-*/device-$host")) {
|
|
$old_dev =~ m:/resource-([^/]+)/:;
|
|
next unless defined($1);
|
|
my $old_res = $1;
|
|
next if $old_res eq $res;
|
|
my $old_name = get_link($old_dev);
|
|
if ($old_name eq $appear) {
|
|
if ( -e "$mars/resource-$old_res/data-$host") {
|
|
ldie "device '/dev/mars/$old_name' is already present in joined resource '$old_res'\n";
|
|
} else {
|
|
lwarn "device '/dev/mars/$old_name' is already present in another unjoined resource '$old_res' -- this does no harm, but may be confusing.\n";
|
|
}
|
|
}
|
|
}
|
|
# warn if devices are named differently throughout the cluster
|
|
foreach my $old_dev (glob("$resdir/device-*")) {
|
|
my $old_name = get_link($old_dev);
|
|
if ($old_name ne $appear) {
|
|
$old_dev =~ m:/device-(.+)$:;
|
|
my $old_host = $1;
|
|
lwarn "your name '/dev/mars/$appear' differs from '/dev/mars/$old_name' on host '$old_host'.";
|
|
lwarn "this does no harm, but may be confusing.";
|
|
}
|
|
}
|
|
}
|
|
|
|
my $file = "$resdir/data-$host";
|
|
if (!$dev) {
|
|
lwarn "file '$file' already exists - reusing\n" if -e $file;
|
|
lprint "setup sparse file '$file' with size $size\n";
|
|
open(OUT, ">>", $file) or ldie "could not open '$file'\n";
|
|
truncate(OUT, $size) or ldie "truncate to size $size failed\n";
|
|
close OUT;
|
|
} else {
|
|
lprint "using existing device '$dev'\n";
|
|
set_link($dev, $file);
|
|
}
|
|
|
|
if ($appear) {
|
|
lprint "resource '$res' will appear as local device '/dev/mars/$appear'\n";
|
|
set_link($appear, "$resdir/device-$host");
|
|
}
|
|
|
|
mkdir("$resdir/userspace") unless -d "$resdir/userspace";
|
|
mkdir("$resdir/defaults") unless -d "$resdir/defaults";
|
|
mkdir("$resdir/defaults-$host");
|
|
mkdir("$resdir/local-$host");
|
|
mkdir("$resdir/actual-$host");
|
|
my $todo = "$resdir/todo-$host";
|
|
mkdir($todo);
|
|
set_link("1", "$todo/attach");
|
|
set_link("1", "$todo/connect");
|
|
set_link("1", "$todo/sync");
|
|
set_link("1", "$todo/allow-replay");
|
|
unlink("$resdir/syncstatus-$host");
|
|
|
|
if ($create) {
|
|
set_link($host, "$resdir/primary");
|
|
set_link($size, "$resdir/syncstatus-$host");
|
|
set_link("log-000000001-$host,0,0", "$resdir/replay-$host");
|
|
system("touch $resdir/log-000000001-$host");
|
|
set_link("00000000000000000000000000000000,log-000000001-$host,0:", "$resdir/version-000000001-$host");
|
|
finish_links();
|
|
lprint "successfully created resource '$res'\n";
|
|
} else {
|
|
_set_replaylink($resdir, $replay_nr, $primary, "");
|
|
set_link("0", "$resdir/syncstatus-$host");
|
|
finish_links();
|
|
lprint "successfully joined resource '$res'\n";
|
|
}
|
|
}
|
|
|
|
sub leave_res_phase0 {
|
|
my ($cmd, $res) = @_;
|
|
check_not_primary(@_);
|
|
foreach my $tmp (glob("$mars/resource-$res/todo-$host/*")) {
|
|
my $status = get_link($tmp, 2);
|
|
ldie "switch '$tmp' is not off\n" if $status;
|
|
}
|
|
check_status($cmd, $res, "is-attached", 0, 0, 1);
|
|
if (!$force) {
|
|
foreach my $tmp (glob("$mars/resource-$res/actual-$host/{is-,logfile-}*")) {
|
|
my $status = get_link($tmp);
|
|
ldie "running status '$tmp' is not off\n" if $status;
|
|
}
|
|
}
|
|
}
|
|
|
|
sub leave_res_phase1 {
|
|
my ($cmd, $res) = @_;
|
|
_create_delete("$mars/resource-$res/replay-$host");
|
|
_create_delete("$mars/resource-$res/data-$host");
|
|
_create_delete("$mars/resource-$res/syncstatus-$host");
|
|
_create_delete("$mars/resource-$res/device-$host");
|
|
_create_delete("$mars/resource-$res/actsize-$host");
|
|
foreach my $dir (glob("$mars/resource-$res/*-$host/")) {
|
|
foreach my $tmp (glob("${dir}*")) {
|
|
_create_delete($tmp);
|
|
}
|
|
_create_delete($dir);
|
|
}
|
|
finish_links();
|
|
}
|
|
|
|
# wait for deletions (avoid races with following commands)
|
|
sub leave_res_phase2 {
|
|
my ($cmd, $res) = @_;
|
|
_wait_delete();
|
|
log_purge_res(@_);
|
|
}
|
|
|
|
sub logrotate_res {
|
|
my ($cmd, $res) = @_;
|
|
check_primary(@_);
|
|
my @paths = glob("$mars/resource-$res/log-*-$host") or ldie "cannot find any logfiles\n";
|
|
@paths = sort(@paths);
|
|
my $last = pop(@paths);
|
|
if (-z $last) {
|
|
lprint "an empty logfile '$last' already exists, nothing to do.\n";
|
|
return;
|
|
}
|
|
my $nr = $last;
|
|
$nr =~ s/^.*log-([0-9]+)-.+$/$1/;
|
|
my $next = sprintf("$mars/resource-$res/log-%09d-$host", $nr + 1);
|
|
ldie "logfile '$next' already exists\n" if -e $next;
|
|
system("touch $next");
|
|
}
|
|
|
|
sub _get_deletable_logfiles {
|
|
my ($cmd, $res) = @_;
|
|
my $min = -1;
|
|
my $max = -1;
|
|
my @log_paths = glob("$mars/resource-$res/log-*") or ldie "cannot find any logfiles\n";
|
|
foreach my $path (@log_paths) {
|
|
$path =~ m/\/log-([0-9]+)-/;
|
|
my $nr = $1;
|
|
$min = $nr if ($nr < $min || $min < 0);
|
|
$max = $nr if ($nr > $max || $max < 0);
|
|
}
|
|
my @paths = glob("$mars/resource-$res/replay-*") or ldie "cannot find any replay symlinks\n";
|
|
foreach my $path (@paths) {
|
|
my $target = get_link($path);
|
|
$target =~ m/^log-([0-9]+)/;
|
|
my $nr = $1;
|
|
$max = $nr if ($nr < $max || $max < 0);
|
|
}
|
|
lprint "min deletable logfile number: $min\n";
|
|
lprint "min non-deletable logfile number: $max\n";
|
|
return ($min, $max);
|
|
}
|
|
|
|
my $delete_nr = -1;
|
|
|
|
sub _create_delete {
|
|
my ($target) = @_;
|
|
ldie "cannot delete: '$target' is no absolute path\n" unless $target =~ m:^/:;
|
|
if ($delete_nr < 0) { # compute only upon first call
|
|
my @paths = glob("$mars/todo-global/delete-*");
|
|
foreach my $path (@paths) {
|
|
$path =~ m/-([0-9]+)/;
|
|
if (defined($1) && $1 > $delete_nr) {
|
|
$delete_nr = $1;
|
|
}
|
|
}
|
|
my @paths2 = glob("$mars/todo-global/deleted-*");
|
|
foreach my $path (@paths2) {
|
|
my $link = get_link($path, 1);
|
|
$link =~ m/([0-9]+)/;
|
|
if (defined($1) && $1 > $delete_nr) {
|
|
$delete_nr = $1;
|
|
}
|
|
}
|
|
}
|
|
my $new = sprintf("$mars/todo-global/delete-%09d-$host", ++$delete_nr);
|
|
lprint "create symlink $new -> $target\n";
|
|
set_link($target, $new);
|
|
}
|
|
|
|
sub _wait_delete {
|
|
for (;;) {
|
|
my $deleted = get_link("$mars/todo-global/deleted-$host");
|
|
last if $deleted >= $delete_nr;
|
|
lprint "waiting for deletions to apply locally....\n";
|
|
sleep_timeout();
|
|
}
|
|
}
|
|
|
|
sub delete_file_cmd {
|
|
my $cmd = shift;
|
|
my $res = shift; # ignore this
|
|
foreach my $path (@_) {
|
|
check_userspace($path);
|
|
_create_delete($path);
|
|
}
|
|
}
|
|
|
|
sub logdelete_res {
|
|
my ($cmd, $res) = @_;
|
|
my @paths = glob("$mars/resource-$res/log-*") or ldie "cannot find any logfiles\n";
|
|
@paths = sort(@paths);
|
|
my ($min_deletable, $max_deletable) = _get_deletable_logfiles(@_);
|
|
if ($min_deletable >= $max_deletable) {
|
|
lprint "no logfiles are deletable.\n";
|
|
return;
|
|
}
|
|
if ($cmd ne "log-delete-all") {
|
|
$max_deletable = $min_deletable + 1; # delete only the first one
|
|
}
|
|
|
|
my $nr = 0;
|
|
for (;;) {
|
|
my $first = shift(@paths);
|
|
last unless $first;
|
|
$nr = $first;
|
|
$nr =~ s/^.*log-([0-9]+)-.+$/$1/;
|
|
next unless $nr < $max_deletable;
|
|
|
|
lprint "chosen '$first' for deletion\n";
|
|
|
|
_create_delete($first);
|
|
}
|
|
lprint "removing left-over version symlinks...\n";
|
|
foreach my $versionlink (glob("$mars/resource-$res/version-*")) {
|
|
my $nrv = $versionlink;
|
|
$nrv =~ s/^.*\/version-([0-9]+)-.+$/$1/;
|
|
# we need at least one more version link than logfiles for consistency checks
|
|
next unless $nrv < $max_deletable - 1;
|
|
_create_delete($versionlink);
|
|
}
|
|
}
|
|
|
|
sub attach_res_phase0 {
|
|
my ($cmd, $res) = @_;
|
|
return if $force;
|
|
my $detach = ($cmd eq "detach");
|
|
if ($detach) {
|
|
my $device_in_use = get_link("$mars/resource-$res/actual-$host/open-count", 1);
|
|
if ($device_in_use) {
|
|
my $name = get_link("$mars/resource-$res/device-$host");
|
|
my $dev = "/dev/mars/$name";
|
|
ldie "device '$dev' is in use\n";
|
|
}
|
|
}
|
|
}
|
|
|
|
sub attach_res_phase1 {
|
|
my ($cmd, $res) = @_;
|
|
my $detach = ($cmd eq "detach");
|
|
my $path = "$mars/resource-$res/todo-$host/attach";
|
|
_switch($cmd, $res, $path, !$detach);
|
|
}
|
|
|
|
sub attach_res_phase2 {
|
|
my ($cmd, $res) = @_;
|
|
my $detach = ($cmd eq "detach");
|
|
check_status($cmd, $res, "is-attached", $detach ? 0 : 1, 1);
|
|
if ($detach) {
|
|
check_mars_device($cmd, $res, 1, 1);
|
|
check_status($cmd, $res, "is-replaying", 0, 1);
|
|
check_status($cmd, $res, "is-syncing", 0, 1);
|
|
}
|
|
}
|
|
|
|
sub connect_global_res {
|
|
my ($cmd, $res) = @_;
|
|
my $disconnect = ($cmd =~ m/disconnect/);
|
|
my @paths = glob("$mars/resource-$res/todo-*/");
|
|
for my $path (@paths) {
|
|
_switch($cmd, $res, "$path/connect", !$disconnect);
|
|
}
|
|
}
|
|
|
|
sub connect_local_res {
|
|
my ($cmd, $res) = @_;
|
|
my $disconnect = ($cmd =~ m/disconnect/);
|
|
my $path = "$mars/resource-$res/todo-$host/connect";
|
|
_switch($cmd, $res, $path, !$disconnect);
|
|
}
|
|
|
|
sub pause_sync_global_res {
|
|
my ($cmd, $res) = @_;
|
|
my $pause = ($cmd =~ m/pause/);
|
|
my @paths = glob("$mars/resource-$res/todo-*/");
|
|
for my $path (@paths) {
|
|
_switch($cmd, $res, "$path/sync", !$pause);
|
|
}
|
|
}
|
|
|
|
sub pause_sync_local_res {
|
|
my ($cmd, $res) = @_;
|
|
my $pause = ($cmd =~ m/pause/);
|
|
my $path = "$mars/resource-$res/todo-$host/sync";
|
|
_switch($cmd, $res, $path, !$pause);
|
|
}
|
|
|
|
sub pause_replay_global_res {
|
|
my ($cmd, $res) = @_;
|
|
my $pause = ($cmd =~ m/pause/);
|
|
my @paths = glob("$mars/resource-$res/todo-*/");
|
|
for my $path (@paths) {
|
|
_switch($cmd, $res, "$path/allow-replay", !$pause);
|
|
}
|
|
}
|
|
|
|
sub pause_replay_local_res {
|
|
my ($cmd, $res) = @_;
|
|
my $pause = ($cmd =~ m/pause/);
|
|
my $path = "$mars/resource-$res/todo-$host/allow-replay";
|
|
_switch($cmd, $res, $path, !$pause);
|
|
}
|
|
|
|
sub up_res_phase0 {
|
|
my ($cmd, $res) = @_;
|
|
my $down = ($cmd eq "down");
|
|
if ($down) {
|
|
attach_res_phase0("detach", $res);
|
|
} else {
|
|
attach_res_phase0("attach", $res);
|
|
}
|
|
}
|
|
|
|
sub up_res_phase1 {
|
|
my ($cmd, $res) = @_;
|
|
my $down = ($cmd eq "down");
|
|
if ($down) {
|
|
pause_replay_local_res("pause-replay-local", $res);
|
|
pause_sync_local_res("pause-sync-local", $res);
|
|
connect_local_res("disconnect", $res);
|
|
attach_res_phase1("detach", $res);
|
|
} else {
|
|
attach_res_phase1("attach", $res);
|
|
connect_local_res("connect", $res);
|
|
pause_sync_local_res("resume-sync-local", $res);
|
|
pause_replay_local_res("resume-replay-local", $res);
|
|
}
|
|
}
|
|
|
|
sub up_res_phase2 {
|
|
my ($cmd, $res) = @_;
|
|
my $down = ($cmd eq "down");
|
|
if ($down) {
|
|
attach_res_phase2("detach", $res);
|
|
} else {
|
|
attach_res_phase2("attach", $res);
|
|
}
|
|
}
|
|
|
|
sub set_replay_res {
|
|
my ($cmd, $res, $new_nr) = @_;
|
|
if (!$new_nr || $new_nr <= 0) {
|
|
ldie "you must supply a numeric logfile number as third argument.\n";
|
|
}
|
|
check_not_primary(@_);
|
|
check_todo($cmd, $res, "allow-replay", 0, 0);
|
|
my $replaylink = "$mars/resource-$res/replay-$host";
|
|
my $old_val = get_link($replaylink);
|
|
my $old_nr = $old_val;
|
|
$old_nr =~ s/log-([0-9]+)-.*/$1/;
|
|
ldie "old log number '$old_nr' is wrong\n" unless $old_nr > 0;
|
|
if ($new_nr > $old_nr) {
|
|
lwarn "you try to skip logfile numbers from $old_nr to $new_nr, are you sure?\n";
|
|
ldie "you would need --force if you really know what you are doing.\n" unless $force;
|
|
}
|
|
my $primary = _get_designated_primary($res);
|
|
_set_replaylink("$mars/resource-$res", $new_nr, $primary);
|
|
}
|
|
|
|
sub fake_local_res {
|
|
my ($cmd, $res) = @_;
|
|
my $path = "$mars/resource-$res/todo-$host/sync";
|
|
_switch($cmd, $res, $path, 0);
|
|
#check_status($res, "copy-syncstatus-$host", 0);
|
|
my $size = get_link("$mars/resource-$res/size");
|
|
my $target = "$mars/resource-$res/syncstatus-$host";
|
|
set_link($size, $target);
|
|
}
|
|
|
|
sub _primary_res {
|
|
my ($res, $new, $old) = @_;
|
|
my $pri = "$mars/resource-$res/primary";
|
|
set_link($new, $pri);
|
|
lprint "designated primary changed from '$old' to '$new'\n";
|
|
}
|
|
|
|
# check whether primary/secondary switching is possible at all
|
|
sub primary_phase0 {
|
|
my ($cmd, $res) = @_;
|
|
ldie "cannot switch primary: mars kernel module is not loaded\n" unless ($cmd eq "secondary" || -d "/proc/sys/mars");
|
|
if ($force) {
|
|
lwarn "You can do a '$cmd --force' only in DISCONNECTED state.\n";
|
|
check_todo($cmd, $res, "connect", 0, 0);
|
|
}
|
|
if ($cmd eq "primary") {
|
|
check_sync_finished($res, $host);
|
|
check_todo($cmd, $res, "attach", 1, 0);
|
|
check_todo($cmd, $res, "connect", 1, 0) if !$force;
|
|
check_todo($cmd, $res, "allow-replay", 1, 0);
|
|
}
|
|
my $old = _get_designated_primary($res);
|
|
return if ($old eq $host and $cmd eq "primary");
|
|
return if $old eq "(none)";
|
|
my $open_count_path = "$mars/resource-$res/actual-$old/open-count";
|
|
my $device_in_use = get_link($open_count_path, 1);
|
|
if ($device_in_use) {
|
|
my $name = get_link("$mars/resource-$res/device-$old", 1) || "unknown";
|
|
lwarn "device '/dev/mars/$name' for resource '$res' is $device_in_use times in use on primary host '$old'\n";
|
|
ldie "first you must umount/close the device (on host '$old')\n" unless $force;
|
|
lwarn "First you SHOULD umount/close the device (on host '$old'), but you ignore this recommendation by giving the --force option.\n";
|
|
if (is_link_recent($open_count_path)) {
|
|
lwarn "You are forcing a SPLIT BRAIN via --force right now. Do you know that this is an ERRONEOUS state? Do you really know what you are doing?\n";
|
|
} else {
|
|
lwarn "You may produce a SPLIT BRAIN via --force because the peer host '$old' is currently not reachable.\n";
|
|
}
|
|
}
|
|
lprint "all preconditions OK for resource '$res'\n";
|
|
}
|
|
|
|
# when necessary, switch to secondary (intermediately)
|
|
sub primary_phase1 {
|
|
my ($cmd, $res) = @_;
|
|
return if ($force and $cmd eq "primary");
|
|
my $old = _get_designated_primary($res);
|
|
return if ($old eq $host and $cmd eq "primary");
|
|
return if ($old ne $host and $cmd eq "secondary");
|
|
my $new = "(none)";
|
|
return if $old eq $new;
|
|
_primary_res($res, $new, $old);
|
|
}
|
|
|
|
# when necessary, wait
|
|
sub primary_phase2 {
|
|
my ($cmd, $res) = @_;
|
|
return if $force;
|
|
return unless $cmd eq "primary";
|
|
check_primary_gone($res);
|
|
my $ok = detect_splitbrain($res);
|
|
try_to_avoid_splitbrain(@_) if $ok;
|
|
}
|
|
|
|
# when necessary, switch to primary
|
|
sub primary_phase3 {
|
|
my ($cmd, $res) = @_;
|
|
return unless $cmd eq "primary";
|
|
my $old = _get_designated_primary($res);
|
|
my $new = $host;
|
|
_primary_res($res, $new, $old);
|
|
}
|
|
|
|
# wait for device to appear / disappear
|
|
sub primary_phase4 {
|
|
my ($cmd, $res) = @_;
|
|
if($cmd eq "secondary") {
|
|
check_mars_device($cmd, $res, 1, 1);
|
|
return;
|
|
}
|
|
my $ok = detect_splitbrain($res, 1);
|
|
if (!$ok) {
|
|
lwarn "Sorry, in split brain situations I can only set the _designated_\n";
|
|
lwarn "primary, but I cannot _guarantee_ that becoming the\n";
|
|
lwarn "the actual primary is possible.\n";
|
|
lwarn "You SHOULD resolve the split brain ASAP (e.g. by leave-resource\n";
|
|
lwarn "or invalidate etc).\n";
|
|
return;
|
|
}
|
|
check_mars_device($cmd, $res, 1, 0);
|
|
}
|
|
|
|
sub wait_umount_res {
|
|
my ($cmd, $res) = @_;
|
|
while (1) {
|
|
my $sum = 0;
|
|
foreach my $path (glob("$mars/resource-$res/actual-*/open-count")) {
|
|
$sum += get_link($path);
|
|
}
|
|
last if !$sum;
|
|
lprint "device for resource '$res' is $sum times in use somewhere\n";
|
|
sleep_timeout(3);
|
|
}
|
|
lprint "OK, device for resource '$res' is not in use.\n";
|
|
}
|
|
|
|
sub invalidate_res_phase0 {
|
|
my ($cmd, $res) = @_;
|
|
check_not_primary(@_);
|
|
my $primary = _get_designated_primary($res);
|
|
ldie "for operation '$cmd', some other designated primary must exist (currently there is none)\n" if $primary eq "(none)";
|
|
}
|
|
|
|
sub invalidate_res_phase1 {
|
|
my ($cmd, $res) = @_;
|
|
_switch($cmd, $res, "$mars/resource-$res/todo-$host/sync", 0);
|
|
_switch($cmd, $res, "$mars/resource-$res/todo-$host/allow-replay", 0);
|
|
}
|
|
|
|
sub invalidate_res_phase2 {
|
|
my ($cmd, $res) = @_;
|
|
if (!$force) {
|
|
check_status($cmd, $res, "is-syncing", 0, 1);
|
|
check_status($cmd, $res, "is-replaying", 0, 1);
|
|
}
|
|
}
|
|
|
|
sub invalidate_res_phase3 {
|
|
my ($cmd, $res) = @_;
|
|
my $dst = "$mars/resource-$res/syncstatus-$host";
|
|
my $primary = _get_designated_primary($res);
|
|
ldie "Cannot execute 'invalidate' because noone is designated as primary.\n" if (!$primary || $primary eq "(none)");
|
|
my $replay = get_link("$mars/resource-$res/replay-$primary");
|
|
$replay =~ m/^log-([0-9]+)-/ or ldie "replay link '$replay' is not parsable\n";
|
|
my $replay_nr = $1;
|
|
set_link("0", $dst);
|
|
finish_links(); # opportunity for errors => don't continue
|
|
_set_replaylink("$mars/resource-$res", $replay_nr, $primary, "");
|
|
_switch($cmd, $res, "$mars/resource-$res/todo-$host/allow-replay", 1);
|
|
_switch($cmd, $res, "$mars/resource-$res/todo-$host/sync", 1);
|
|
}
|
|
|
|
sub resize_res {
|
|
my ($cmd, $res, $size_arg) = @_;
|
|
my $new_size = 0;
|
|
if ($size_arg) {
|
|
$new_size = get_size($size_arg);
|
|
ldie "optional size argument '$new_size' must be numeric and positive\n" unless scalar($new_size) > 0;
|
|
lprint "new size: $new_size bytes\n";
|
|
}
|
|
check_primary(@_);
|
|
my @actsizes = glob("$mars/resource-$res/actsize-*");
|
|
ldie "resource $res has no actsize-* symlinks\n" unless @actsizes;
|
|
my $lnk = "$mars/resource-$res/size";
|
|
my $old_size = get_link($lnk);
|
|
my $min_size = 0;
|
|
foreach my $actsize (@actsizes) {
|
|
my $this_size = get_link($actsize);
|
|
if (!$min_size || $this_size < $min_size) {
|
|
$min_size = $this_size;
|
|
}
|
|
}
|
|
lprint "old_size=$old_size\n";
|
|
lprint "min_size=$min_size\n";
|
|
$new_size = $min_size if !$new_size;
|
|
lprint "new_size=$new_size\n";
|
|
ldie "new size $new_size is higher than the minimum size of all volumes $min_size" if $new_size > $min_size; # no override with --force possible
|
|
# for now, disallow decreasing until some bugs are fixed
|
|
ldie "only increases of the size are possible!\n" if $new_size < $old_size;
|
|
ldie "only increases of the size are possible without --force\n" if $new_size <= $old_size && !$force;
|
|
foreach my $switch (glob("$mars/resource-$res/todo-*/sync")) {
|
|
my $this_switch = get_link($switch);
|
|
ldie "sync on '$switch' is switched on -- use marsadm pause-sync to stop\n" unless !$this_switch;
|
|
}
|
|
my @syncsizes = glob("$mars/resource-$res/syncstatus-$host");
|
|
foreach my $syncsize (@syncsizes) {
|
|
my $this_size = get_link($syncsize);
|
|
ldie "sync on $syncsize has not yet finished: $this_size != $old_size (DANGEROUS FIX: if you know what you are doing, marsadm fake-sync can 'fix' it -- but this may need a full-sync afterwards)\n" unless $this_size == $old_size;
|
|
}
|
|
foreach my $syncsize (@syncsizes) {
|
|
my $this_size = get_link($syncsize);
|
|
set_link($new_size, $syncsize);
|
|
}
|
|
set_link($new_size, $lnk);
|
|
}
|
|
|
|
sub role_cmd {
|
|
my ($cmd, $res) = @_;
|
|
my $primary = _get_actual_primary($res) || '(none)';
|
|
my $todo_primary = _get_designated_primary($res);
|
|
my $msg = "I am actually ";
|
|
$msg .= ($primary eq $host) ? "primary" : "secondary";
|
|
if ($primary eq $todo_primary) {
|
|
$msg .= " and $primary is primary" if ($primary ne $host);
|
|
}
|
|
elsif ($primary ne $todo_primary) {
|
|
$todo_primary = "I" if ($todo_primary eq $host);
|
|
$msg .= " and $todo_primary should be primary";
|
|
}
|
|
lprint $msg . "\n";
|
|
}
|
|
|
|
sub mars_state_cmd {
|
|
my ($cmd, $res) = @_;
|
|
my $primary = _get_actual_primary($res) || '(none)';
|
|
my $todo_primary = _get_designated_primary($res);
|
|
|
|
if ($primary eq $host) {
|
|
lprint "is_primary\n";
|
|
return;
|
|
}
|
|
elsif ($todo_primary eq $host) {
|
|
lprint "becoming_primary\n";
|
|
return;
|
|
}
|
|
|
|
# secondary without ambitions to become primary
|
|
|
|
my $size = get_link("$mars/resource-$res/size");
|
|
my $syncstatus = get_link("$mars/resource-$res/syncstatus-$host");
|
|
if ($syncstatus != $size) {
|
|
lprint "secondary inconsistent ($syncstatus bytes of $size)\n";
|
|
return;
|
|
}
|
|
|
|
if ($primary eq "(none)") {
|
|
my $min = 0;
|
|
foreach my $path (glob("$mars/resource-$res/log-*")) {
|
|
my $nr = $path;
|
|
$nr =~ s:^.*[a-z]+-([0-9]+)(-[^/]*)?$:$1:;
|
|
if ($nr > $min) {
|
|
$primary = $path;
|
|
$primary =~ s:^.*/[a-z]+-[0-9]+-([^/]*)$:$1:;
|
|
$min = $nr;
|
|
}
|
|
}
|
|
}
|
|
my $primary_replay = get_link("$mars/resource-$res/replay-$primary");
|
|
my $host_replay = get_link("$mars/resource-$res/replay-$host");
|
|
if ($primary_replay eq $host_replay) {
|
|
lprint "secondary uptodate\n";
|
|
return;
|
|
}
|
|
lprint "secondary outdated ($host_replay instead of $primary_replay)\n";
|
|
}
|
|
|
|
sub cat_cmd {
|
|
my $cmd = shift;
|
|
foreach my $path (@_) {
|
|
_get_text($path, undef, 1);
|
|
}
|
|
}
|
|
|
|
sub mars_info_cmd {
|
|
my ($cmd, $res) = @_;
|
|
my $info = "$mars/resource-$res/logstatus-$host.status";
|
|
cat_cmd($cmd, $info);
|
|
}
|
|
|
|
sub show_cmd {
|
|
my ($cmd, $res) = @_;
|
|
$res = "*" if !$res || $res eq "all";
|
|
my $glob = "$mars/{ips/ip-$host,alive-$host,emergency-$host,rest-space-$host,resource-$res/{device,primary,size,actsize-$host,syncstatus-$host,replay-$host,actual-$host/*,todo-$host/*}}";
|
|
foreach my $link (glob($glob)) {
|
|
next unless -l $link;
|
|
my $res = get_link($link);
|
|
my $short = $link;
|
|
$short =~ s:^$mars/::;
|
|
lprint "$short=$res\n";
|
|
}
|
|
}
|
|
|
|
sub show_errors_cmd {
|
|
my ($cmd, $res) = @_;
|
|
my $text = get_error_text(@_);
|
|
if ($text) {
|
|
lprint $text;
|
|
ldie "resource $res has some (old) problems.\n";
|
|
} else {
|
|
lprint "no errors/warnings are reported.\n";
|
|
}
|
|
}
|
|
|
|
sub helplist {
|
|
my $temp;
|
|
$temp = shift;
|
|
lprint "ERROR: $temp" if ($temp);
|
|
lprint "
|
|
marsadm [<global_option>] <command> [<resource>] [<option>]
|
|
|
|
<global_option> =
|
|
--force : skip safety checks
|
|
use only when you know what you are doing!
|
|
--timeout=<seconds> : leave safety checks after timeout with an error
|
|
instead of waiting forever
|
|
|
|
<command> =
|
|
cluster : create-cluster join-cluster leave-cluster
|
|
resource : create-resource join-resource leave-resource
|
|
primary secondary invalidate
|
|
up down
|
|
replication: connect disconnect connect-local disconnect-local
|
|
replay : pause-replay resume-replay pause-replay-local resume-replay-local
|
|
sync : pause-sync resume-sync pause-sync-local resume-sync-local fake-sync
|
|
logfile : log-rotate log-delete log-delete-all
|
|
device : attach detach
|
|
internal : help version
|
|
|
|
<resource> = name of resource or \"all\" for all resources
|
|
|
|
<option> = special by command
|
|
\n";
|
|
exit 0;
|
|
}
|
|
|
|
sub version {
|
|
lprint "$0 $Id\n";
|
|
#lprint "my IP is $ip\n";
|
|
exit 0;
|
|
}
|
|
|
|
##################################################################
|
|
my %cmd_table =
|
|
(
|
|
# new keywords
|
|
"create-cluster" => \&create_cluster,
|
|
"join-cluster" => \&join_cluster,
|
|
"leave-cluster" => \&leave_cluster,
|
|
"create-resource" => \&create_res,
|
|
"join-resource" => \&create_res,
|
|
"leave-resource" => [
|
|
"check preconditions", \&leave_res_phase0,
|
|
"switch state", \&leave_res_phase1,
|
|
"wait for deletions", \&leave_res_phase2,
|
|
],
|
|
"log-rotate" => \&logrotate_res,
|
|
"log-delete" => \&logdelete_res,
|
|
"log-delete-all" => \&logdelete_res,
|
|
"fake-sync" => \&fake_local_res,
|
|
"set-link" => \&set_link_cmd,
|
|
"delete-file" => \&delete_file_cmd,
|
|
"cat" => \&cat_cmd,
|
|
"show" => \&show_cmd,
|
|
"show-errors" => \&show_errors_cmd,
|
|
"show-state" => \&mars_state_cmd,
|
|
"mars-state" => \&mars_state_cmd, # deprecated
|
|
"show-info" => \&mars_info_cmd,
|
|
"mars-info" => \&mars_info_cmd, # deprecated
|
|
"pause-replay-local" => \&pause_replay_local_res,
|
|
"pause-replay-global" => \&pause_replay_global_res,
|
|
"pause-replay" => \&pause_replay_local_res,
|
|
"resume-replay-local" => \&pause_replay_local_res,
|
|
"resume-replay-global"=> \&pause_replay_global_res,
|
|
"resume-replay" => \&pause_replay_local_res,
|
|
"set-replay" => \&set_replay_res,
|
|
"wait-umount" => \&wait_umount_res,
|
|
"wait-cluster" => \&wait_cluster,
|
|
"wait-resource" => \&wait_cluster,
|
|
|
|
# compatible keywords (or their derivatives)
|
|
"attach" => [
|
|
"check preconditions", \&attach_res_phase0,
|
|
"switch state", \&attach_res_phase1,
|
|
"wait for effect", \&attach_res_phase2,
|
|
],
|
|
"detach" => [
|
|
"check preconditions", \&attach_res_phase0,
|
|
"switch state", \&attach_res_phase1,
|
|
"wait for effect", \&attach_res_phase2,
|
|
],
|
|
"connect-local" => \&connect_local_res,
|
|
"connect-global" => \&connect_global_res,
|
|
"connect" => \&connect_local_res,
|
|
"disconnect-local" => \&connect_local_res,
|
|
"disconnect-global" => \&connect_global_res,
|
|
"disconnect" => \&connect_local_res,
|
|
"syncer" => \&ignore_cmd,
|
|
"up" => [
|
|
"check preconditions", \&up_res_phase0,
|
|
"switch state", \&up_res_phase1,
|
|
"wait for effect", \&up_res_phase2,
|
|
],
|
|
"down" => [
|
|
"check preconditions", \&up_res_phase0,
|
|
"switch state", \&up_res_phase1,
|
|
"wait for effect", \&up_res_phase2,
|
|
],
|
|
"primary" => [
|
|
"check preconditions", \&primary_phase0,
|
|
"leave primary state", \&primary_phase1,
|
|
"wait when necessary", \&primary_phase2,
|
|
"switch to primary", \&primary_phase3,
|
|
"wait for device", \&primary_phase4,
|
|
],
|
|
"secondary" => [
|
|
"check preconditions", \&primary_phase0,
|
|
"leave primary state", \&primary_phase1,
|
|
"wait for effect", \&primary_phase4,
|
|
],
|
|
"invalidate" => [
|
|
"check preconditions", \&invalidate_res_phase0,
|
|
"stop old replay", \&invalidate_res_phase1,
|
|
"wait for replay off", \&invalidate_res_phase2,
|
|
"force symlinks", \&invalidate_res_phase3,
|
|
],
|
|
"invalidate-remote" => \&forbidden_cmd,
|
|
"resize" => \&resize_res,
|
|
"create-md" => \&senseless_cmd,
|
|
"get-gi" => \&ignore_cmd,
|
|
"show-gi" => \&ignore_cmd,
|
|
"dump-md" => \&senseless_cmd,
|
|
"outdate" => \&ignore_cmd,
|
|
"adjust" => \&ignore_cmd,
|
|
"wait-connect" => \&wait_cluster,
|
|
"role" => \&role_cmd,
|
|
"state" => \&role_cmd,
|
|
"cstate" => \&nyi_cmd,
|
|
"dstate" => \&nyi_cmd,
|
|
"status" => \&nyi_cmd,
|
|
"dump" => \&senseless_cmd,
|
|
"verify" => \&forbidden_cmd,
|
|
"pause-sync-local" => \&pause_sync_local_res,
|
|
"pause-sync-global" => \&pause_sync_global_res,
|
|
"pause-sync" => \&pause_sync_local_res,
|
|
"resume-sync-local" => \&pause_sync_local_res,
|
|
"resume-sync-global"=> \&pause_sync_global_res,
|
|
"resume-sync" => \&pause_sync_local_res,
|
|
"new-current-uuid" => \&senseless_cmd,
|
|
"hidden-commands" => \&ignore_cmd,
|
|
);
|
|
|
|
my @args;
|
|
|
|
foreach my $arg (@ARGV) {
|
|
if ($arg eq "--force" || $arg eq "-f") {
|
|
$force++;
|
|
next;
|
|
} elsif ($arg eq "--verbose" || $arg eq "-v") {
|
|
$verbose++;
|
|
next;
|
|
} elsif ($arg =~ s/--timeout\s*=\s*([0-9]+)/$1/) {
|
|
$timeout = $arg;
|
|
next;
|
|
} elsif ($arg =~ s/--host\s*=\s*([-_A-Za-z0-9]+)/$1/) {
|
|
ldie "host '$arg' does not exist in /mars/ips/ip-*\n" unless -l "/mars/ips/ip-$arg";
|
|
if ($arg ne $host) {
|
|
lprint "ATTENTION: acting as if I were host '$arg'\n";
|
|
lwarn "some commands require local knowledge not available here.\n";
|
|
lwarn "thus something may fail or go wrong - use this at your risk!\n";
|
|
$host = $arg;
|
|
}
|
|
next;
|
|
}
|
|
if ($arg =~ s/^force-//) {
|
|
$force++;
|
|
}
|
|
push @args, $arg;
|
|
}
|
|
|
|
my $cmd = shift @args || helplist "command argument is missing\n";
|
|
|
|
$notify = "(cmd: $cmd)" unless $cmd eq "version";
|
|
|
|
if ($cmd =~ m/^help$/ || $cmd =~ m/^h$/) {
|
|
helplist;
|
|
}
|
|
|
|
if ($cmd =~ m/^version$/ || $cmd =~ m/^v$/) {
|
|
version;
|
|
}
|
|
|
|
ldie "only root may use this tool\n" if $< != 0 && $cmd !~ m/^cat$/; # getpid() seems to be missing in perlfunc
|
|
helplist "unknown command $cmd\n" if !exists $cmd_table{$cmd};
|
|
if (!(-d $mars) && $cmd !~ m/(create|join)-cluster|cat/) {
|
|
ldie "The $mars directory does not exist.\n";
|
|
}
|
|
|
|
my $res = "";
|
|
if ($cmd eq "show") {
|
|
$res = shift @args;
|
|
} elsif (!($cmd =~ m/^(create|leave|wait)-cluster|cat|[a-z]+-file|set-[a-z]+$/)) {
|
|
$res = shift @args || helplist "resource argument is missing\n";
|
|
check_id($res);
|
|
}
|
|
|
|
|
|
lwarn "Using FORCE option -- hopefully you know what you are doing!\n" if $force;
|
|
|
|
my %checked_res;
|
|
|
|
sub do_one_res {
|
|
my $func = shift;
|
|
my ($cmd, $res) = @_;
|
|
if (!$checked_res{"$cmd$res"}) {
|
|
$res = check_res($res) unless $cmd =~ m/^(join|create|leave|wait)-cluster|create-resource|show|cat|[a-z]+-file|set-link$/;
|
|
check_res_member($res) unless $cmd =~ m/^(join|create)-(cluster|resource)|(leave|wait)-cluster|show|cat|[a-z]+-file|set-link$/;
|
|
detect_splitbrain($res, 1);
|
|
$checked_res{"$cmd$res"} = 1;
|
|
}
|
|
&{$func}(@_);
|
|
}
|
|
|
|
my %skip_res;
|
|
|
|
sub do_all_res {
|
|
my $func = shift;
|
|
my $cmd = shift;
|
|
my $res = shift || "all";
|
|
if ($res eq "all" && $cmd !~ m/show|cat|cluster|set-link|delete-file/) {
|
|
ldie "For safety reasons, --force is only allowed on explicitly named resources. Combination of 'all' with --force is disallowed!\n" if $force;
|
|
ldie "Cannot combine command '$cmd' with 'all' existing resources - you must explicitly name a single new resource\n" if $cmd =~ m/create|join/;
|
|
my $any_success = 0;
|
|
my $any_member = 0;
|
|
foreach $res (glob("$mars/resource-*")) {
|
|
next unless -e "$res/data-$host";
|
|
$any_member++;
|
|
$res =~ s/^.*\/resource-(.*)$/$1/;
|
|
next if defined($skip_res{$res});
|
|
lprint "--------- resource $res\n";
|
|
eval {
|
|
do_one_res($func, $cmd, $res, @_);
|
|
1;
|
|
} and $any_success = 1 or $skip_res{$res} = 1;
|
|
}
|
|
if (!$any_success) {
|
|
if (!$any_member) {
|
|
lprint "I am not member of any resource\n";
|
|
return 1;
|
|
}
|
|
ldie "all resources have errors\n";
|
|
}
|
|
return !$any_success;
|
|
} else {
|
|
return do_one_res($func, $cmd, $res, @_);
|
|
}
|
|
}
|
|
|
|
my $func = $cmd_table{$cmd};
|
|
ldie "unknown command '$cmd'\n" unless $func;
|
|
|
|
if (ref($func) eq "ARRAY") {
|
|
my @list = @$func;
|
|
while (@list) {
|
|
my $headline = shift @list;
|
|
my $memb_func = shift @list;
|
|
lprint "---------------------------- $headline:\n";
|
|
my $status = do_all_res($memb_func, $cmd, $res, @args);
|
|
last if (defined($status) && $status);
|
|
finish_links();
|
|
}
|
|
} elsif (ref($func) eq "CODE") {
|
|
do_all_res($func, $cmd, $res, @args);
|
|
} else {
|
|
ldie "internal error: command table is wrong for '$cmd'";
|
|
}
|
|
|
|
finish_links();
|
|
|
|
exit($error_count);
|