mirror of
https://github.com/schoebel/mars
synced 2024-12-23 07:03:09 +00:00
120 lines
3.6 KiB
Bash
Executable File
120 lines
3.6 KiB
Bash
Executable File
#!/bin/bash
|
|
#
|
|
# This file is part of MARS project: http://schoebel.github.io/mars/
|
|
#
|
|
# Copyright (C) 2015 Thomas Schoebel-Theuer
|
|
# Copyright (C) 2015 1&1 Internet AG
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation; either version 2 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License along
|
|
# with this program; if not, write to the Free Software Foundation, Inc.,
|
|
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
|
|
############################################################
|
|
|
|
# TST summer 2015 lab prototype
|
|
|
|
const_fetch_warn=${const_fetch_warn:-20000} # KiB
|
|
const_replay_warn=${const_replay_warn:-500000} # KiB
|
|
|
|
# Allow overrides of default values by external config file
|
|
for path in {.,$HOME,/etc/defaults}/check-mars-switchable.conf; do
|
|
[[ -r $path ]] && . $path
|
|
done
|
|
|
|
# Global precondition: the mars kernel module must be loaded.
|
|
|
|
if ! [[ -d /proc/sys/mars ]]; then
|
|
echo "ERROR: mars kernel module is not loaded"
|
|
exit 1
|
|
fi
|
|
|
|
# This script works on a single resource, or on "all".
|
|
# When no argument is given, treat as "all".
|
|
|
|
if [[ "$1" = "all" ]] || [[ "$1" = "" ]] ; then
|
|
rc=0
|
|
for resource in $(marsadm view-my-resources); do
|
|
$0 $resource || (( rc++ ))
|
|
done
|
|
exit $rc
|
|
fi
|
|
|
|
resource="$1"
|
|
|
|
|
|
# Check whether the resource is attached.
|
|
|
|
if (( $(marsadm view-is-attach $resource) < 1 )); then
|
|
echo "ERROR: resource '$resource' is not attached"
|
|
exit 1
|
|
fi
|
|
|
|
# Check whether the resource is already Primary.
|
|
# In this case, we simply say "OK", because it will do no harm
|
|
# if you switch something to Primary which is already Primary.
|
|
# Alternatively, you may place an error here.
|
|
|
|
if (( $(marsadm view-is-primary $resource) > 0 )); then
|
|
echo "OK: resource '$resource' is already Primary. Nothing to do."
|
|
exit 0
|
|
fi
|
|
|
|
# Check whether sync has finished
|
|
|
|
if (( $(marsadm view-sync-rest $resource) > 0 )); then
|
|
echo "ERROR: resource '$resource' has not reached sync"
|
|
exit 1
|
|
fi
|
|
|
|
|
|
# Check whether consistency has been violated
|
|
|
|
if (( $(marsadm view-is-consistent $resource) < 1 )); then
|
|
echo "ERROR: resource '$resource' is not (yet) consistent"
|
|
exit 1
|
|
fi
|
|
|
|
# Check whether the current primary can be reached over network.
|
|
# We issue a warning only.
|
|
|
|
if (( $(marsadm view-is-alive $resource) < 1 )); then
|
|
echo "WARNING: the current Primary '$(marsadm view-get-primary $resource)' of resource '$resource' cannot be reached currently. You may need --force if you really want to switch anyway."
|
|
fi
|
|
|
|
|
|
# Check split brain.
|
|
# We issue a warning only.
|
|
|
|
if (( $(marsadm view-is-split-brain $resource) > 0 )); then
|
|
echo "WARNING: resource '$resource' is in split brain mode. Switching via --force should be possible, but be sure to switch to the correct side."
|
|
fi
|
|
|
|
# Check fetch and replay margins.
|
|
# We issue a warning only.
|
|
|
|
for mode in fetch replay; do
|
|
limit=$(eval echo \$const_${mode}_warn)
|
|
# disable the check if the limit is zero
|
|
(( limit <= 0 )) && continue
|
|
# convert units from bytes to KiB
|
|
value=$(( $(marsadm view-$mode-rest $resource) / 1024 ))
|
|
if (( value > limit )); then
|
|
echo "WARNING: resource '$resource' has $mode lagbehind: $value > $limit KiB"
|
|
fi
|
|
done
|
|
|
|
# Finally: no errors found
|
|
|
|
echo "OK: nothing speaks against switching resource '$resource' at generic mars level."
|
|
exit 0
|