[k8s]: k8s master HA not supported

[Pulkit Tandon]

R5.0-ocata-50.

Tried ansible provisioning with following roles:
  bms1:
    provider: bms
    ip: 77.77.1.20
    roles:
      config_database:
      config:
      control:
      analytics_database:
      analytics:
      webui:
      k8s_master:
      kubemanager:
  bms2:
    provider: bms
    ip: 77.77.1.30
    roles:
      config_database:
      config:
      control:
      analytics_database:
      analytics:
      webui:
      k8s_master:
      kubemanager:
  bms3:
    provider: bms
    ip: 77.77.1.11
    roles:
      config_database:
      config:
      control:
      analytics_database:
      analytics:
      webui:
      k8s_master:
      kubemanager:
  bms4:
    provider: bms
    ip: 77.77.1.21
    roles:
      k8s_node:
      vrouter:
        PHYSICAL_INTERFACE: bond0
  bms5:
    provider: bms
    ip: 77.77.1.31
    roles:
      k8s_node:
      vrouter:
        PHYSICAL_INTERFACE: enp2s0f1

K8s master got installed on only 1 node.
k8s master HA provisioning is not supported yet.
Need to enhance the ansible-deployer to support that.

NOTE: K8s master HA is often confused with kube-manager HA. Please note that k8s-master HA does not have anything to do with contrail and is a feature supported by k8s.

[Michael Henkel (mhenkel-3)]

K8S HA implementation is not trivial as it requires vrrp and haproxy. The need for vrrp makes it imposible to deploy the masters across different subnets.