FIX Cluster join must use synthetic host name and CTDB must be running

entrypoint.sh

@@ -64,11 +64,18 @@ if [ ! -f "$ETC_DIR/krb5.keytab" ]; then
 
   rm -f "$ETC_DIR/smb.conf" /etc/krb5.conf
 
+	if [ "$CTDB_ENABLED" = "true" ]; then
+		PREV_HOSTNAME=`hostname`
+		hostname -b "$CLUSTER_NAME.$DOMAIN"
+	fi
   # realm join is broken as it requires --privileged but difficult to add for swarm
   # so it can execute /usr/sbin/adcli. Therefore we execute it directly and create
   # the /etc/krb5.conf and /etc/sssd/sssd.conf manually
   # echo $ADMIN_PASSWORD|realm join -v $REALM --user=$ADMIN_ACCOUNT
   echo $ADMIN_PASSWORD|/usr/sbin/adcli join --verbose --domain $DOMAIN --domain-realm $REALM --login-type user --login-user $ADMIN_ACCOUNT --stdin-password
+	if [ "$CTDB_ENABLED" = "true" ]; then
+		hostname -b "$PREV_HOSTNAME"
+	fi
   mv /etc/krb5.keytab "$ETC_DIR/"
 fi
 
@@ -117,7 +124,14 @@ if [ -z "$REAL_REALM" ]; then
   mkdir -p /var/lib/samba/private
 
   # Join
+	if [ "$CTDB_ENABLED" = "true" ]; then
+		((/usr/sbin/ctdbd --interactive)&)
+		CTDB_PID=$!
+	fi
   net ads join --no-dns-updates -U"$ADMIN_ACCOUNT"%"$ADMIN_PASSWORD"
+	if [ "$CTDB_ENABLED" = "true" ]; then
+		kill $CTDB_PID
+	fi
 
   ((/usr/bin/supervisord -c /etc/supervisor/conf.d/supervisord.conf -j /tmp/sp.pid)&)
   sleep 10