mirror of https://github.com/schoebel/mars
91 lines
2.8 KiB
Bash
Executable File
91 lines
2.8 KiB
Bash
Executable File
#!/bin/bash
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#
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# This file is part of MARS project: http://schoebel.github.io/mars/
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#
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# Copyright (C) 2015 Thomas Schoebel-Theuer
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# Copyright (C) 2015 1&1 Internet AG
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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############################################################
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# TST summer 2015 lab prototype
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#
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# check_mars_consistent.sh
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#
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# This script is NOT for deciding whether a switchover is
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# possible.
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#
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# It tests a much simpler condition: whether a _potential_ target
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# of a switchover is principally / _statically usable_ for switchover
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# at all.
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#
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# This is a true subset of the conditions checked by check_mars_switchable.sh.
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#
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# NOTICE: this does to take split brain into account. It cannot tell you
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# which side is the "correct" one.
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#
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# Please use check_mars_switchable.sh for deciding whether an actual
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# switchover should be started.
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# Allow overrides of default values by external config file
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for path in {.,$HOME,/etc/defaults}/check-mars-consistent.conf; do
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[[ -r $path ]] && . $path
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done
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# This script works on a single resource, or on "all".
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# When no argument is given, treat as "all".
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if [[ "$1" = "all" ]] || [[ "$1" = "" ]] ; then
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rc=0
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for resource in $(marsadm view-my-resources 2> /dev/null); do
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$0 $resource || (( rc++ ))
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done
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exit $rc
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fi
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resource="$1"
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# Check whether the resource is already Primary.
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# It does not make any sense to switchover to itself.
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# But anyway, we simply say "OK", because the primary side
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# is always consistent by _definition_.
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if (( $(marsadm view-is-primary $resource 2> /dev/null) > 0 )); then
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echo "OK: resource '$resource' is consistent at generic mars level."
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exit 0
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fi
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# Check whether sync has finished
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if (( $(marsadm view-sync-rest $resource 2> /dev/null) > 0 )); then
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echo "ERROR: resource '$resource' is inconsistent because it has not (yet) reached sync"
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exit 1
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fi
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# Check whether consistency has been violated
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if (( $(marsadm view-is-consistent $resource 2> /dev/null) < 1 )); then
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echo "ERROR: resource '$resource' is not (yet) consistent"
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exit 1
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fi
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# Finally: no errors found
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echo "OK: resource '$resource' is consistent at generic mars level."
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exit 0
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