etcd3: Allow for multi-host deployments

In Multi host deployments, it is possible to run ETCD in a different
host than the SERVICE_HOST (where all the controllers run). This patch
brings that distinction.

Change-Id: I15fe6f25eedf1efebaab81cce26b080577b856cc
Signed-off-by: Antoni Segura Puimedon <antonisp@celebdor.com>

Author: celebdor

lib/etcd3

@@ -53,9 +53,9 @@ function start_etcd3 {
     cmd+=" --initial-cluster-state new --initial-cluster-token etcd-cluster-01"
     cmd+=" --initial-cluster $HOSTNAME=http://$SERVICE_HOST:2380"
     cmd+=" --initial-advertise-peer-urls http://$SERVICE_HOST:2380"
-    cmd+=" --advertise-client-urls http://$SERVICE_HOST:$ETCD_PORT"
+    cmd+=" --advertise-client-urls http://${HOST_IP}:$ETCD_PORT"
     cmd+=" --listen-peer-urls http://0.0.0.0:2380 "
-    cmd+=" --listen-client-urls http://$SERVICE_HOST:$ETCD_PORT"
+    cmd+=" --listen-client-urls http://${HOST_IP}:$ETCD_PORT"
 
     local unitfile="$SYSTEMD_DIR/$ETCD_SYSTEMD_SERVICE"
     write_user_unit_file $ETCD_SYSTEMD_SERVICE "$cmd" "" "root"