glusterd/ganesha : Move ganesha-ha.conf and ganesha.conf to shared storage

Currently all the ganesha related configuration files(ganesha.conf,
ganesha-ha.conf, export files, etc) is stored locally at /etc/ganesha
on a every node in ganesha cluster. Usually we end up in two issues by
doing so :
* difficult in modifiying ganesha related conf file
* diffciult to maintain consistency of conf file across ganesha cluster
To tackle this, we plan to move all the ganesha configuration to shared
storage. As a first step in this patch ganesha.conf and ganesha-ha.conf
move to shared storage. Here actual ganesha.conf will resides in shared
stoarge and symlinks will be created in /etc/ganesha when the option
"gluster nfs-ganesha enable" is executed and remove those during the
"disable" part.

Modified prerequisites to done before running globaloption:
	* enable shared storage
	* create nfs-ganesha folder in shared storage
	* create ganesha.conf and ganesha-ha.conf in it

More details can be found at http://review.gluster.org/#/c/15105/

Change-Id: Ifabb6c5db50061f077a03932940190af74e2ca7f
BUG: 1355956
Signed-off-by: Jiffin Tony Thottan <jthottan@redhat.com>
Reviewed-on: http://review.gluster.org/14906
Reviewed-by: soumya k <skoduri@redhat.com>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
Smoke: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>

1 files changed, 29 insertions, 5 deletions

diff --git a/extras/ganesha/scripts/ganesha-ha.sh b/extras/ganesha/scripts/ganesha-ha.sh
index 143897f2401..28fc837550f 100644
--- a/extras/ganesha/scripts/ganesha-ha.sh
+++ b/extras/ganesha/scripts/ganesha-ha.sh
@@ -22,9 +22,9 @@
 
 HA_NUM_SERVERS=0
 HA_SERVERS=""
-HA_CONFDIR="/etc/ganesha"
 HA_VOL_NAME="gluster_shared_storage"
 HA_VOL_MNT="/var/run/gluster/shared_storage"
+HA_CONFDIR=$HA_VOL_MNT"/nfs-ganesha"
 SERVICE_MAN="DISTRO_NOT_FOUND"
 
 RHEL6_PCS_CNAME_OPTION="--name"
@@ -416,12 +416,8 @@ teardown_cluster()
 
 cleanup_ganesha_config ()
 {
-       rm -rf ${HA_CONFDIR}/exports/*.conf
-       rm -rf ${HA_CONFDIR}/.export_added
        rm -rf /etc/cluster/cluster.conf*
        rm -rf /var/lib/pacemaker/cib/*
-       sed -r -i -e '/^%include[[:space:]]+".+\.conf"$/d' ${GANESHA_CONF}
-       rm -rf ${HA_VOL_MNT}/nfs-ganesha
 }
 
 do_create_virt_ip_constraints()
@@ -848,6 +844,29 @@ status()
     rm -f ${status_file}
 }
 
+create_ganesha_conf_file()
+{
+        if [ $1 == "yes" ];
+        then
+                if [  -e $GANESHA_CONF ];
+                then
+                        rm -rf $GANESHA_CONF
+                fi
+        # The symlink /etc/ganesha/ganesha.conf need to be
+        # created using ganesha conf file mentioned in the
+        # shared storage. Every node will only have this
+        # link and actual file will stored in shared storage,
+        # so that ganesha conf editing of ganesha conf will
+        # be easy as well as it become more consistent.
+
+                ln -s $HA_CONFDIR/ganesha.conf $GANESHA_CONF
+        else
+        # Restoring previous file
+                rm -rf $GANESHA_CONF
+                sed -r -i -e '/^%include[[:space:]]+".+\.conf"$/d' $HA_CONFDIR/ganesha.conf
+                cp $HA_CONFDIR/ganesha.conf $GANESHA_CONF
+        fi
+}
 
 main()
 {
@@ -989,6 +1008,11 @@ $HA_CONFDIR/ganesha-ha.conf
         refresh_config ${VOL} ${HA_CONFDIR} ${HA_SERVERS}
         ;;
 
+    setup-ganesha-conf-files | --setup-ganesha-conf-files)
+
+        create_ganesha_conf_file ${1}
+        ;;
+
     *)
         # setup and teardown are not intended to be used by a
         # casual user