Adding support for the kube-router flag --cluster-asn flag (#8837)

inventory/sample/group_vars/k8s_cluster/k8s-net-kube-router.yml

@@ -26,6 +26,9 @@
 # https://github.com/cloudnativelabs/kube-router/blob/master/docs/user-guide.md
 # kube_router_extra_args: []
 
+# ASN number of the cluster, used when communicating with external BGP routers
+# kube_router_cluster_asn: ~
+
 # ASN numbers of the BGP peer to which cluster nodes will advertise cluster ip and node's pod cidr.
 # kube_router_peer_router_asns: ~
 

roles/network_plugin/kube-router/defaults/main.yml

@@ -25,6 +25,9 @@ kube_router_enable_dsr: false
 # https://github.com/cloudnativelabs/kube-router/blob/master/docs/user-guide.md
 kube_router_extra_args: []
 
+# ASN number of the cluster, used when communicating with external BGP routers
+kube_router_cluster_asn: ~
+
 # ASN numbers of the BGP peer to which cluster nodes will advertise cluster ip and node's pod cidr.
 kube_router_peer_router_asns: ~
 

roles/network_plugin/kube-router/templates/kube-router.yml.j2

@@ -49,6 +49,9 @@ spec:
 {% if kube_router_advertise_loadbalancer_ip %}
         - --advertise-loadbalancer-ip
 {% endif %}
+{% if kube_router_cluster_asn %}
+        - --cluster-asn={{ kube_router_cluster_asn }}
+{% endif %}
 {% if kube_router_peer_router_asns %}
         - --peer-router-asns={{ kube_router_peer_router_asns }}
 {% endif %}