Adding custom api interface for keepalived

This PS adds a possibility to override api_interface for a specific
host, it is very usefull when hosts do not use the same NICs.
It is done the same way as for neutron-openvswitch-agent.

TrivialFix

Change-Id: Ica173f75ba73272aa144e65d736936f5426a91d0

services/keepalived/keepalived-daemonset.yml.j2

@@ -24,6 +24,11 @@ spec:
                  "sh",
                  "-c",
                  "cp -a /srv/configmap/..data/* /srv/pod-main-config/;
+                  API_INTERFACE={{ api_interface }};
+                  F=/var/lib/kolla-kubernetes/keepalived/api_interface;
+                  [ -f $F ] && API_INTERFACE=$(<$F);
+                  sed -i ''s|interface.*|interface ''$API_INTERFACE''|g'' /srv/pod-main-config/keepalived.conf;
+                  sed -i ''s|\\(dev*\\).*|\\1 ''$API_INTERFACE''|g'' /srv/pod-main-config/keepalived.conf;
                  " ],
              "volumeMounts": [
                 {
@@ -33,6 +38,10 @@ spec:
                 {
                     "name": "pod-main-config",
                     "mountPath": "/srv/pod-main-config"
+                },
+                {
+                    "name": "host-var-lib-kk",
+                    "mountPath": "/var/lib/kolla-kubernetes"
                 }
              ]
           }
@@ -73,3 +82,6 @@ spec:
         - name: host-run
           hostPath:
             path: /run
+        - name: host-var-lib-kk
+          hostPath:
+            path: /var/lib/kolla-kubernetes