PatchInventory: check_ganeti

#!/bin/bash
# vim: set fileencoding=utf-8
#
# Copyright (C) 2010 Loic Dachary <loic@dachary.org>
# Copyright (C) 2009 Maxence Dunnewind <maxence@dunnewind.net>
#
# 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 3 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, see <http://www.gnu.org/licenses/>.

VERIFY_CACHE=${VERIFY_CACHE:-/tmp/gnt-verify}
TESTING=${TESTING:-false}

if ! $TESTING
then
    if [ $# -lt 1 ];then
        echo "Use: $0 <node-name>"
        exit 3
    fi

    NODE=$1

    if ! gnt-node list -o name "$NODE" > /dev/null
    then
        echo "Node $NODE does not exist."
        exit 1
    fi

    if [ ! -f $VERIFY_CACHE ] || find $VERIFY_CACHE -mmin +60 | grep $VERIFY_CACHE
    then
        gnt-cluster verify > $VERIFY_CACHE
    fi

    ERR=$(grep "$NODE: not enough memory" < $VERIFY_CACHE)
    if [ "$ERR" = "" ];then
        echo "$NODE has enough memory to failover all instances"
        exit 0
    else
        echo $ERR
        exit 2
    fi
else
    set -xe
    unset TESTING
    test $(hostname --fqdn) = $(gnt-cluster getmaster)
    # argument sanity check
    $0 | grep Use:
    if $0 
    then
        false
    else
        test $? = 3
    fi
    # node existence sanity check
    if $0 fakenode 
    then
        false
    else
        test $? = 1
    fi
    export VERIFY_CACHE=/tmp/test-check-ganeti
    # simulate an error
    echo ERROR: node $(hostname --fqdn): not enough memory on to accommodate failovers should peer node OTHERNODE fail > $VERIFY_CACHE
    if $0 $(hostname --fqdn)
    then
        false
    else
        test $? = 2
    fi
    # simulate success
    > $VERIFY_CACHE
    $0 $(hostname --fqdn)
    # create cluster verify cache file
    rm -f $VERIFY_CACHE
    $0 $(hostname --fqdn) || true # not interested by the actual state of the cluster
    test -f $VERIFY_CACHE
    # refresh an old verify cache file
    > $VERIFY_CACHE
    touch -t 198001020304 $VERIFY_CACHE
    $0 $(hostname --fqdn) || true # not interested by the actual state of the cluster
    test -s $VERIFY_CACHE
    echo DONE
fi
# Interpreted by emacs
# Local Variables:
# compile-command: "TESTING=true check_ganeti"
# End: