#!/bin/sh
#
#
#   dnsupdater-failover OCF RA. Does nothing but wait a few seconds, can be
#   configured to fail occassionally.
#
# Copyright (c) 2004 SUSE LINUX AG, Lars Marowsky-Bree
#                    All Rights Reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of version 2 of the GNU General Public License as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it would be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
# Further, this software is distributed without any warranty that it is
# free of the rightful claim of any third person regarding infringement
# or the like.  Any license provided herein, whether implied or
# otherwise, applies only to this software file.  Patent licenses, if
# any, provided herein do not apply to combinations of this program with
# other software, or any other product whatsoever.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write the Free Software Foundation,
# Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
#

#######################################################################
# Initialization:

: ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat}
. ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs

#######################################################################

meta_data() {
    cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="dnsupdater-failover" version="0.9">
<version>1.0</version>
<longdesc lang="en">
Failover ocf script for sbrf dns-updater
</longdesc>
<shortdesc lang="en">ocf for dnsupdater</shortdesc>
<parameters>
<parameter name="state" unique="1">
<longdesc lang="en">
Location to store the resource state in.
</longdesc>
<shortdesc lang="en">State file</shortdesc>
<content type="string" default="${HA_RSCTMP}/dnsupdater-failover-${OCF_RESOURCE_INSTANCE}.state" />
</parameter>
<parameter name="fake" unique="0">
<longdesc lang="en">
Fake attribute that can be changed to cause a reload
</longdesc>
<shortdesc lang="en">Fake attribute that can be changed to cause a reload</shortdesc>
<content type="string" default="dnsupdater-failover" />
</parameter>
</parameters>
<actions>
<action name="start"        timeout="20" />
<action name="stop"         timeout="20" />
<action name="monitor"      timeout="20" interval="10" depth="0" />
<action name="reload"       timeout="20" />
<action name="migrate_to"   timeout="20" />
<action name="migrate_from" timeout="20" />
<action name="meta-data"    timeout="5" />
<action name="validate-all"   timeout="20" />
</actions>
</resource-agent>
END
}

#######################################################################

dnsupdaterfailover_usage() {
    cat <<END
usage: $0 {start|stop|monitor|migrate_to|migrate_from|validate-all|meta-data}
Expects to have a fully populated OCF RA-compliant environment set.
END
}

dnsupdaterfailover_start() {
    dnsupdater-failover_monitor
    /usr/bin/python /usr/lib/python2.7/dist-packages/os_dns_updater/openstack-dns-updater.py
    if [ $? =  $OCF_SUCCESS ]; then
        return $OCF_SUCCESS
    fi
    touch ${OCF_RESKEY_state}
}

dnsupdaterfailover_stop() {
    dnsupdater-failover_monitor
    if [ $? =  $OCF_SUCCESS ]; then
        rm ${OCF_RESKEY_state}
    fi
    return $OCF_SUCCESS
}

dnsupdaterfailover_monitor() {
    # Monitor _MUST!_ differentiate correctly between running
    # (SUCCESS), failed (ERROR) or _cleanly_ stopped (NOT RUNNING).
    # That is THREE states, not just yes/no.

    if [ -f ${OCF_RESKEY_state} ]; then
        return $OCF_SUCCESS
    fi
    if false ; then
        return $OCF_ERR_GENERIC
    fi

    if ! ocf_is_probe && [ "$__OCF_ACTION" = "monitor" ]; then
        # set exit string only when NOT_RUNNING occurs during an actual monitor operation.
        ocf_exit_reason "No process state file found"
    fi
    return $OCF_NOT_RUNNING
}

dnsupdaterfailover_validate() {
    # Is the state directory writable?
    state_dir=`dirname "$OCF_RESKEY_state"`
    touch "$state_dir/$$"
    if [ $? != 0 ]; then
        ocf_exit_reason "State file \"$OCF_RESKEY_state\" is not writable"
        return $OCF_ERR_ARGS
    fi
    rm "$state_dir/$$"

    return $OCF_SUCCESS
}

: ${OCF_RESKEY_state=${HA_RSCTMP}/dnsupdater-failover-${OCF_RESOURCE_INSTANCE}.state}
: ${OCF_RESKEY_fake="dnsupdaterfailover"}

case $__OCF_ACTION in
meta-data)      meta_data
                exit $OCF_SUCCESS
                ;;
start)          dnsupdaterfailover_start;;
stop)           dnsupdaterfailover_stop;;
monitor)        dnsupdaterfailover_monitor;;
migrate_to)     ocf_log info "Migrating ${OCF_RESOURCE_INSTANCE} to ${OCF_RESKEY_CRM_meta_migrate_target}."
                dnsupdaterfailover_stop
                ;;
migrate_from)   ocf_log info "Migrating ${OCF_RESOURCE_INSTANCE} from ${OCF_RESKEY_CRM_meta_migrate_source}."
                dnsupdaterfailover_start
                ;;
reload)         ocf_log info "Reloading ${OCF_RESOURCE_INSTANCE} ..."
                ;;
validate-all)   dnsupdaterfailover_validate;;
usage|help)     dnsupdaterfailover_usage
                exit $OCF_SUCCESS
                ;;
*)              dnsupdaterfailover_usage
                exit $OCF_ERR_UNIMPLEMENTED
                ;;
esac
rc=$?
ocf_log debug "${OCF_RESOURCE_INSTANCE} $__OCF_ACTION : $rc"
exit $rc