#!/bin/bash

#

# Copyright (c) 2014 Anand Subramanian anands@redhat.com

# Copyright (c) 2015 Red Hat Inc.

#                    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

if [ -n "${OCF_DEBUG_LIBRARY}" ]; then

	. ${OCF_DEBUG_LIBRARY}

else

	: ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat}

	. ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs

fi

OCF_RESKEY_ha_vol_mnt_default="/run/gluster/shared_storage"

: ${OCF_RESKEY_ha_vol_mnt=${OCF_RESKEY_ha_vol_mnt_default}}

ganesha_meta_data() {

	cat <

<resource-agent name="ganesha_nfsd">

<version>1.0</version>

<longdesc lang="en">

This Linux-specific resource agent acts as a dummy

resource agent for nfs-ganesha.

</longdesc>

<shortdesc lang="en">Manages the user-space nfs-ganesha NFS server</shortdesc>

<parameters>

<parameter name="ha_vol_mnt">

<longdesc lang="en">HA State Volume Mount Point</longdesc>

<shortdesc lang="en">HA_State Volume Mount Point</shortdesc>

<content type="string" default="" />

</parameter>

</parameters>

<actions>

<action name="start"   timeout="5s" />

<action name="stop"    timeout="5s" />

<action name="status" depth="0"  timeout="5s" interval="0" />

<action name="monitor" depth="0"  timeout="5s" interval="0" />

<action name="meta-data"  timeout="20s" />

</actions>

</resource-agent>

END

return ${OCF_SUCCESS}

}

ganesha_nfsd_usage() {

	echo "ganesha.nfsd USAGE"

}

# Make sure meta-data and usage always succeed

case $__OCF_ACTION in

	meta-data)	ganesha_meta_data

			exit ${OCF_SUCCESS}

			;;

	usage|help)	ganesha_usage

			exit ${OCF_SUCCESS}

			;;

	*)

			;;

esac

ganesha_nfsd_start()

{

	local long_host=$(hostname)

	if [[ -d /var/lib/nfs ]]; then

		mv /var/lib/nfs /var/lib/nfs.backup

		if [ $? -ne 0 ]; then

			ocf_log notice "mv /var/lib/nfs /var/lib/nfs.backup failed"

		fi

		ln -s ${OCF_RESKEY_ha_vol_mnt}/nfs-ganesha/${long_host}/nfs /var/lib/nfs

		if [ $? -ne 0 ]; then

			ocf_log notice "ln -s ${OCF_RESKEY_ha_vol_mnt}/nfs-ganesha/${long_host}/nfs /var/lib/nfs failed"

		fi

	fi

	return ${OCF_SUCCESS}

}

ganesha_nfsd_stop()

{

	if [ -L /var/lib/nfs -a -d /var/lib/nfs.backup ]; then

		rm -f /var/lib/nfs

		if [ $? -ne 0 ]; then

			ocf_log notice "rm -f /var/lib/nfs failed"

		fi

		mv /var/lib/nfs.backup /var/lib/nfs

		if [ $? -ne 0 ]; then

			ocf_log notice "mv /var/lib/nfs.backup /var/lib/nfs failed"

		fi

	fi

	return ${OCF_SUCCESS}

}

ganesha_nfsd_monitor()

{

	# pacemaker checks to see if RA is already running before starting it.

	# if we return success, then it's presumed it's already running and

	# doesn't need to be started, i.e. invoke the start action.

	# return something other than success to make pacemaker invoke the

	# start action

	if [[ -L /var/lib/nfs ]]; then

		return ${OCF_SUCCESS}

	fi

	return ${OCF_NOT_RUNNING}

}

ganesha_nfsd_validate()

{

	return ${OCF_SUCCESS}

}

ganesha_nfsd_validate

# ocf_log notice "ganesha_nfsd ${OCF_RESOURCE_INSTANCE} $__OCF_ACTION"

# Translate each action into the appropriate function call

case $__OCF_ACTION in

start)          ganesha_nfsd_start

		;;

stop)           ganesha_nfsd_stop

		;;

status|monitor) ganesha_nfsd_monitor

		;;

*)              ganesha_nfsd_usage

		exit ${OCF_ERR_UNIMPLEMENTED}

		;;

esac

rc=$?

# The resource agent may optionally log a debug message

ocf_log debug "${OCF_RESOURCE_INSTANCE} ${__OCF_ACTION} returned $rc"

exit $rc