Fixes start from empty volume

Author: solsson

zookeeper/10zookeeper-config.yml

@@ -8,6 +8,7 @@ data:
     #!/bin/bash
     set -x
 
+    [ -d /var/lib/zookeeper/data ] || mkdir /var/lib/zookeeper/data
     [ -z "$ID_OFFSET" ] && ID_OFFSET=1
     export ZOOKEEPER_SERVER_ID=$((${HOSTNAME##*-} + $ID_OFFSET))
     echo "${ZOOKEEPER_SERVER_ID:-1}" | tee /var/lib/zookeeper/data/myid