hook-scripts: don't let ctdb script change samba config

There are several reasons why the behaviour in
the hook scripts was bad:

1. A samba installation is clustered or non-clustered.
   That does not change because of the availability
   of the CTDB lock-volume. If the lock-volume is not
   available (and hence CTDB is not available or not
   healthy), then Samba won't be operational. But turning
   it into a non-clustered Samba-installation can in
   the worst case lead to data corruption if clients
   manage to access the same files (on share volumes).
   Hence 'clustering = yes/no' in Samba's config should
   not be touched.

   In particular, Samba should not be stopped/started by
   the hook script. If needed, then ctdb will take care
   of it.

2. Changing the idmap configuration is potentially
   dangerous as well. In particular the used tdb2
   backend is legacy nowadays and should not be used
   any more in new installs. (I stems from the times
   when ctdb could not host persistent databases.)
   Changing the idmap can result in loss of access
   to files or in giving access to files where it is
   not intended.

3. The pattern used for detecting need for change is
   fragile. It may or may not play well possible
   manual changes to smb.conf.

This change removes the parts that change the smb.conf
file and start or stop Samba from the S29CTDB* hook scripts.

> Change-Id: I72f7aabafa8f089da4531fca2572a72c22825bcc
> BUG: 1290151
> Signed-off-by: Michael Adam <obnox@samba.org>
> Reviewed-on: http://review.gluster.org/12930
> Tested-by: Gluster Build System <jenkins@build.gluster.com>
> Reviewed-by: Raghavendra Talur <rtalur@redhat.com>

(cherry picked from commit 27c16d6da82876a689dfba53b8d45c3a3a657954)

Change-Id: Ie1f787cebb5f6da1a658f7dead879fa854901ef5
BUG: 1292254
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-on: http://review.gluster.org/12986
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Raghavendra Talur <rtalur@redhat.com>

2 files changed, 0 insertions, 38 deletions

diff --git a/extras/hook-scripts/start/post/S29CTDBsetup.sh b/extras/hook-scripts/start/post/S29CTDBsetup.sh
index cbb76767eb9..5229ad52e3d 100755
--- a/extras/hook-scripts/start/post/S29CTDBsetup.sh
+++ b/extras/hook-scripts/start/post/S29CTDBsetup.sh
@@ -6,7 +6,6 @@
 #   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
 PING_TIMEOUT_SECS=10
@@ -45,16 +44,6 @@ function parse_args () {
         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
@@ -71,9 +60,6 @@ function add_fstab_entry () {
 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
         # Make sure ping-timeout is not default for CTDB volume
diff --git a/extras/hook-scripts/stop/pre/S29CTDB-teardown.sh b/extras/hook-scripts/stop/pre/S29CTDB-teardown.sh
index 9125030bb7e..9ba8a1cf372 100755
--- a/extras/hook-scripts/stop/pre/S29CTDB-teardown.sh
+++ b/extras/hook-scripts/stop/pre/S29CTDB-teardown.sh
@@ -1,6 +1,5 @@
 #! /bin/bash
 #non-portable - RHS-2.0 only
-SMB_CONF=/etc/samba/smb.conf
 
 CTDB_MNT=/gluster/lock
 PROGNAME="ctdb"
@@ -13,16 +12,6 @@ VOL=
 # User needs to set META to the volume that serves CTDB lockfile.
 META="all"
 
-function sighup_samba () {
-        pid=`cat /var/run/smbd.pid`
-        if [ "$pid" != "" ]
-        then
-                kill -HUP $pid;
-        else
-                /etc/init.d/smb start
-        fi
-}
-
 function parse_args () {
         ARGS=$(getopt -l $OPTSPEC  -name $PROGNAME $@)
         eval set -- "$ARGS"
@@ -46,17 +35,6 @@ function parse_args () {
 }
 
 
-function remove_ctdb_options () {
-        IFS=$'\n'
-        GLUSTER_CTDB_CONFIG=$'# ctdb config for glusterfs\n\tclustering = yes\n\tidmap backend = tdb2\n'
-
-        for line in $GLUSTER_CTDB_CONFIG
-        do
-                sed -i /"$line"/d $SMB_CONF
-        done
-        unset IFS
-}
-
 function remove_fstab_entry () {
         mntpt=$1
         fstab="/etc/fstab"
@@ -80,6 +58,4 @@ then
         umount "$CTDB_MNT"
         chkconfig ctdb off
         remove_fstab_entry $CTDB_MNT
-        remove_ctdb_options
-        sighup_samba
 fi