Load ip_vs module for keepalived

If ip_vs is not loaded keepalived will enter a restart loop.  To fix that
load ip_vs module every time we start the container.

Change-Id: I6b39d8654cc6a6da7a9162e5c3efab073746b246
Closes-Bug: #1486276

ansible/roles/haproxy/tasks/start.yml

@@ -17,6 +17,7 @@
     volumes:
       - "{{ node_config_directory }}/keepalived/:/opt/kolla/keepalived/:ro"
       - "/run:/run"
+      - "/lib/modules:/lib/modules:ro"
     env:
       KOLLA_CONFIG_STRATEGY: "{{ config_strategy }}"
 

docker/common/keepalived/start.sh

@@ -10,4 +10,6 @@ source /opt/kolla/kolla-common.sh
 # Execute config strategy
 set_configs
 
+modprobe ip_vs
+
 exec $CMD $ARGS