hook-scripts: Move smb hooks to right place.

Moved the hook-scripts to dirs corresponding to event.
Also, edited S30samba-set.sh to with changes in
other two hook scripts to bring uniformity.

Change-Id: Ib98c0a18d4bb5d0ba4b881b2e19b40d72580b1c2
BUG: 1073468
Signed-off-by: Raghavendra Talur <rtalur@redhat.com>
Reviewed-on: http://review.gluster.org/7201
Reviewed-by: Poornima G <pgurusid@redhat.com>
Reviewed-by: Bala FA <barumuga@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>

4 files changed, 190 insertions, 0 deletions

diff --git a/extras/hook-scripts/start/Makefile.am b/extras/hook-scripts/start/Makefile.am
new file mode 100644
index 000000000..1fcade4b0
--- /dev/null
+++ b/extras/hook-scripts/start/Makefile.am
@@ -0,0 +1,2 @@
+SUBDIRS = post
+CLEANFILES =
diff --git a/extras/hook-scripts/start/post/Makefile.am b/extras/hook-scripts/start/post/Makefile.am
new file mode 100644
index 000000000..d9cba93ed
--- /dev/null
+++ b/extras/hook-scripts/start/post/Makefile.am
@@ -0,0 +1 @@
+EXTRA_DIST = S29CTDBsetup.sh S30samba-start.sh
diff --git a/extras/hook-scripts/start/post/S29CTDBsetup.sh b/extras/hook-scripts/start/post/S29CTDBsetup.sh
new file mode 100755
index 000000000..da077a6fb
--- /dev/null
+++ b/extras/hook-scripts/start/post/S29CTDBsetup.sh
@@ -0,0 +1,77 @@
+#! /bin/bash
+# RHS-2.0 only
+# - The script mounts the 'meta-vol' on start 'event' on a known
+#   directory (eg. /gluster/lock)
+# - Adds the necessary configuration changes for ctdb in smb.conf and
+#   restarts smb service.
+# - P.S: There are other 'tasks' that need to be done outside this script
+#   to get CTDB based failover up and running.
+
+SMB_CONF=/etc/samba/smb.conf
+
+CTDB_MNT=/gluster/lock
+PROGNAME="ctdb"
+OPTSPEC="volname:"
+VOL=
+# $META is the volume that will be used by CTDB as a shared filesystem.
+# It is not desirable to use this volume for storing 'data' as well.
+# META is set to 'all' (viz. a keyword and hence not a legal volume name)
+# to prevent the script from running for volumes it was not intended.
+# User needs to set META to the volume that serves CTDB lockfile.
+META="all"
+
+function parse_args () {
+        ARGS=$(getopt -l $OPTSPEC  -name $PROGNAME $@)
+        eval set -- "$ARGS"
+
+        while true; do
+            case $1 in
+                --volname)
+                    shift
+                    VOL=$1
+                ;;
+
+                *)
+                     shift
+                     break
+                ;;
+
+            esac
+
+            shift
+        done
+}
+
+function add_glusterfs_ctdb_options () {
+        PAT="Share Definitions"
+        GLUSTER_CTDB_CONFIG="# ctdb config for glusterfs\n\tclustering = yes\n\tidmap backend = tdb2\n"
+        exists=`grep "clustering = yes" "$SMB_CONF"`
+        if [ "$exists" == "" ]
+        then
+            sed -i /"$PAT"/i\ "$GLUSTER_CTDB_CONFIG" "$SMB_CONF"
+        fi
+}
+
+function add_fstab_entry () {
+        volname=$1
+        mntpt=$2
+        mntent="`hostname`:/$volname $mntpt glusterfs defaults,transport=tcp 0 0"
+        exists=`grep "^$mntent" /etc/fstab`
+        if [ "$exists" == "" ]
+        then
+            echo "$mntent" >> /etc/fstab
+        fi
+}
+
+parse_args $@
+if [ "$META" = "$VOL" ]
+then
+    #expects ctdb service to manage smb
+    service smb stop
+    add_glusterfs_ctdb_options
+    mkdir -p $CTDB_MNT
+    sleep 5
+    mount -t glusterfs `hostname`:$VOL "$CTDB_MNT" && \
+        add_fstab_entry $VOL $CTDB_MNT
+    chkconfig ctdb on
+fi
diff --git a/extras/hook-scripts/start/post/S30samba-start.sh b/extras/hook-scripts/start/post/S30samba-start.sh
new file mode 100755
index 000000000..529348e25
--- /dev/null
+++ b/extras/hook-scripts/start/post/S30samba-start.sh
@@ -0,0 +1,110 @@
+#!/bin/bash
+
+#Need to be copied to hooks/<HOOKS_VER>/start/post
+
+#TODO: All gluster and samba paths are assumed for fedora like systems.
+#Some efforts are required to make it work on other distros.
+
+#The preferred way of creating a smb share of a gluster volume has changed.
+#The old method was to create a fuse mount of the volume and share the mount
+#point through samba.
+#
+#New method eliminates the requirement of fuse mount and changes in fstab.
+#glusterfs_vfs plugin for samba makes call to libgfapi to access the volume.
+#
+#This hook script automagically creates shares for volume on every volume start
+#event by adding the entries in smb.conf file and sending SIGHUP to samba.
+#
+#In smb.conf:
+#glusterfs vfs plugin has to be specified as required vfs object.
+#Path value is relative to the root of gluster volume;"/" signifies complete
+#volume.
+
+PROGNAME="Ssamba-start"
+OPTSPEC="volname:"
+VOL=
+CONFIGFILE=
+LOGFILEBASE=
+PIDDIR=
+
+function parse_args () {
+        ARGS=$(getopt -l $OPTSPEC  -name $PROGNAME $@)
+        eval set -- "$ARGS"
+
+        while true; do
+        case $1 in
+        --volname)
+         shift
+         VOL=$1
+         ;;
+        *)
+         shift
+         break
+         ;;
+        esac
+        shift
+        done
+}
+
+function find_config_info () {
+        cmdout=`smbd -b | grep smb.conf`
+        if [ $? -ne 0 ];then
+                echo "Samba is not installed"
+                exit 1
+        fi
+        CONFIGFILE=`echo $cmdout | awk {'print $2'}`
+        PIDDIR=`smbd -b | grep PIDDIR | awk {'print $2'}`
+        LOGFILEBASE=`smbd -b | grep 'LOGFILEBASE' | awk '{print $2}'`
+}
+
+function add_samba_share () {
+        volname=$1
+        STRING="\n[gluster-$volname]\n"
+        STRING+="comment = For samba share of volume $volname\n"
+        STRING+="vfs objects = glusterfs\n"
+        STRING+="glusterfs:volume = $volname\n"
+        STRING+="glusterfs:logfile = $LOGFILEBASE/glusterfs-$volname.%%M.log\n"
+        STRING+="glusterfs:loglevel = 7\n"
+        STRING+="path = %%P/\n"
+        STRING+="read only = no\n"
+        STRING+="guest ok = yes\n"
+        printf "$STRING"  >> ${CONFIGFILE}
+}
+
+function sighup_samba () {
+        pid=`cat ${PIDDIR}/smbd.pid`
+        if [ "x$pid" != "x" ]
+        then
+                kill -HUP "$pid";
+        else
+                /etc/init.d/smb condrestart
+        fi
+}
+
+function get_smb () {
+        volname=$1
+        uservalue=
+
+        usercifsvalue=$(grep user.cifs /var/lib/glusterd/vols/"$volname"/info |\
+                        cut -d"=" -f2)
+        usersmbvalue=$(grep user.smb /var/lib/glusterd/vols/"$volname"/info |\
+                       cut -d"=" -f2)
+
+        if [[ $usercifsvalue = "disable" || $usersmbvalue = "disable" ]]; then
+                uservalue="disable"
+        fi
+        echo "$uservalue"
+}
+
+parse_args $@
+if [ $(get_smb "$VOL") = "disable" ]; then
+        exit 0
+fi
+
+#Find smb.conf, smbd pid directory and smbd logfile path
+find_config_info
+
+if ! grep --quiet "\[gluster-$VOL\]" ${CONFIGFILE} ; then
+        add_samba_share $VOL
+        sighup_samba
+fi