Merge pull request #72 from drnic/override-patroni-scope

allow $PATRONI_SCOPE to be set via 'docker run -e PATRONI_SCOPE=ironman'

docker/entrypoint.sh

@@ -3,25 +3,25 @@
 function usage()
 {
     cat <<__EOF__
-Usage: $0 
+Usage: $0
 
 Options:
 
     --etcd      ETCD    Provide an external etcd to connect to
-    --name      NAME    Give the cluster a specific name 
+    --name      NAME    Give the cluster a specific name
     --etcd-only         Do not run Patroni, run a standalone etcd
 
 Examples:
 
     $0 --etcd=127.17.0.84:4001
     $0 --etcd-only
-    $0 
+    $0
     $0 --name=true_scotsman
 __EOF__
 }
 
 DOCKER_IP=$(hostname --ip-address)
-PATRONI_SCOPE=batman
+PATRONI_SCOPE=${PATRONI_SCOPE:-batman}
 
 optspec=":vh-:"
 while getopts "$optspec" optchar; do
@@ -32,7 +32,7 @@ while getopts "$optspec" optchar; do
                     exec etcd --data-dir /tmp/etcd.data \
                         -advertise-client-urls=http://${DOCKER_IP}:4001 \
                         -listen-client-urls=http://0.0.0.0:4001 \
-                        -listen-peer-urls=http://0.0.0.0:2380 
+                        -listen-peer-urls=http://0.0.0.0:2380
                     exit 0
                     ;;
                 cheat)