Swarm: Add swarm master HA support

Add --replication and --advertise to swarm master to support swarm HA.
After this patch, user can start more than 1 swarm master.

Refer docs: https://docs.docker.com/swarm/multi-manager-setup/

Partially implements: blueprint swarm-high-availability
Change-Id: I3b6c1ad64598541d055178a54f1507af6882c736

magnum/templates/swarm/fragments/write-swarm-master-service.sh

@@ -20,15 +20,17 @@ ExecStart=/usr/bin/docker run --name swarm-manager \\
                               -e no_proxy=$NO_PROXY \\
                               swarm:$SWARM_VERSION \\
                               manage -H tcp://0.0.0.0:2375 \\
+                              --replication \\
+                              --advertise $NODE_IP:2376 \\
 END_SERVICE_TOP
 
 if [ $TLS_DISABLED = 'False'  ]; then
 
 cat >> /etc/systemd/system/swarm-manager.service << END_TLS
-                                  --tlsverify \\
-                                  --tlscacert=/etc/docker/ca.crt \\
-                                  --tlskey=/etc/docker/server.key \\
-                                  --tlscert=/etc/docker/server.crt \\
+                              --tlsverify \\
+                              --tlscacert=/etc/docker/ca.crt \\
+                              --tlskey=/etc/docker/server.key \\
+                              --tlscert=/etc/docker/server.crt \\
 END_TLS
 
 fi

magnum/templates/swarm/swarmmaster.yaml

@@ -299,6 +299,7 @@ resources:
           template: {get_file: fragments/write-swarm-master-service.sh}
           params:
             "$ETCD_SERVER_IP": {get_param: etcd_server_ip}
+            "$NODE_IP": {get_attr: [swarm_master_eth0, fixed_ips, 0, ip_address]}
             "$DISCOVERY_URL": {get_param: discovery_url}
             "$WAIT_HANDLE": {get_resource: master_wait_handle}
             "$HTTP_PROXY": {get_param: http_proxy}