Replace kube-master with kube_control_plane (#7256)

This replaces kube-master with kube_control_plane because of [1]:

  The Kubernetes project is moving away from wording that is
  considered offensive. A new working group WG Naming was created
  to track this work, and the word "master" was declared as offensive.
  A proposal was formalized for replacing the word "master" with
  "control plane". This means it should be removed from source code,
  documentation, and user-facing configuration from Kubernetes and
  its sub-projects.

NOTE: The reason why this changes it to kube_control_plane not
      kube-control-plane is for valid group names on ansible.

[1]: https://github.com/kubernetes/enhancements/blob/master/keps/sig-cluster-lifecycle/kubeadm/2067-rename-master-label-taint/README.md#motivation

roles/network_plugin/calico/tasks/check.yml

@@ -43,7 +43,7 @@
   changed_when: False
   register: calico
   run_once: True
-  delegate_to: "{{ groups['kube-master'][0] }}"
+  delegate_to: "{{ groups['kube_control_plane'][0] }}"
 
 - name: "Set calico_pool_conf"
   set_fact:

roles/network_plugin/calico/tasks/install.yml

@@ -39,7 +39,7 @@
   include_tasks: typha_certs.yml
   when:
     - typha_secure
-    - inventory_hostname == groups['kube-master'][0]
+    - inventory_hostname == groups['kube_control_plane'][0]
 
 - name: Calico | Install calicoctl wrapper script
   template:
@@ -74,14 +74,14 @@
   delay: "{{ retry_stagger | random + 3 }}"
   changed_when: false
   when:
-    - inventory_hostname == groups['kube-master'][0]
+    - inventory_hostname == groups['kube_control_plane'][0]
 
 - name: Calico | Ensure that calico_pool_cidr is within kube_pods_subnet when defined
   assert:
     that: "[calico_pool_cidr] | ipaddr(kube_pods_subnet) | length == 1"
     msg: "{{ calico_pool_cidr }} is not within or equal to {{ kube_pods_subnet }}"
   when:
-    - inventory_hostname == groups['kube-master'][0]
+    - inventory_hostname == groups['kube_control_plane'][0]
     - 'calico_conf.stdout == "0"'
     - calico_pool_cidr is defined
 
@@ -97,7 +97,7 @@
   delay: "{{ retry_stagger | random + 3 }}"
   changed_when: false
   when:
-    - inventory_hostname == groups['kube-master'][0]
+    - inventory_hostname == groups['kube_control_plane'][0]
     - enable_dual_stack_networks
 
 - name: Calico | Ensure that calico_pool_cidr_ipv6 is within kube_pods_subnet_ipv6 when defined
@@ -105,7 +105,7 @@
     that: "[calico_pool_cidr_ipv6] | ipaddr(kube_pods_subnet_ipv6) | length == 1"
     msg: "{{ calico_pool_cidr_ipv6 }} is not within or equal to {{ kube_pods_subnet_ipv6 }}"
   when:
-    - inventory_hostname == groups['kube-master'][0]
+    - inventory_hostname == groups['kube_control_plane'][0]
     - calico_conf_ipv6.stdout is defined and calico_conf_ipv6.stdout == "0"
     - calico_pool_cidr_ipv6 is defined
     - enable_dual_stack_networks
@@ -134,9 +134,9 @@
         filename: "{{ kube_config_dir }}/kdd-crds.yml"
         state: "latest"
       when:
-        - inventory_hostname == groups['kube-master'][0]
+        - inventory_hostname == groups['kube_control_plane'][0]
   when:
-    - inventory_hostname in groups['kube-master']
+    - inventory_hostname in groups['kube_control_plane']
     - calico_datastore == "kdd"
 
 - name: Calico | Configure calico network pool
@@ -157,7 +157,7 @@
           "vxlanMode": "{{ calico_vxlan_mode }}",
           "natOutgoing": {{ nat_outgoing|default(false) and not peer_with_router|default(false) }} }}
   when:
-    - inventory_hostname == groups['kube-master'][0]
+    - inventory_hostname == groups['kube_control_plane'][0]
     - 'calico_conf.stdout == "0"'
 
 - name: Calico | Configure calico ipv6 network pool (version >= v3.3.0)
@@ -176,7 +176,7 @@
           "vxlanMode": "{{ calico_vxlan_mode_ipv6 }}",
           "natOutgoing": {{ nat_outgoing_ipv6|default(false) and not peer_with_router_ipv6|default(false) }} }}
   when:
-    - inventory_hostname == groups['kube-master'][0]
+    - inventory_hostname == groups['kube_control_plane'][0]
     - calico_conf_ipv6.stdout is defined and calico_conf_ipv6.stdout == "0"
     - calico_version is version("v3.3.0", ">=")
     - enable_dual_stack_networks | bool
@@ -214,7 +214,7 @@
           "serviceExternalIPs": {{ _service_external_ips|default([]) }} }}
   changed_when: false
   when:
-    - inventory_hostname == groups['kube-master'][0]
+    - inventory_hostname == groups['kube_control_plane'][0]
 
 - name: Calico | Configure peering with router(s) at global scope
   command:
@@ -238,7 +238,7 @@
   with_items:
     - "{{ peers|selectattr('scope','defined')|selectattr('scope','equalto', 'global')|list|default([]) }}"
   when:
-    - inventory_hostname == groups['kube-master'][0]
+    - inventory_hostname == groups['kube_control_plane'][0]
     - peer_with_router|default(false)
 
 - name: Calico | Configure peering with route reflectors at global scope
@@ -264,7 +264,7 @@
   with_items:
     - "{{ groups['calico-rr'] | default([]) }}"
   when:
-    - inventory_hostname == groups['kube-master'][0]
+    - inventory_hostname == groups['kube_control_plane'][0]
     - peer_with_calico_rr|default(false)
 
 - name: Calico | Configure route reflectors to peer with each other
@@ -290,7 +290,7 @@
   with_items:
     - "{{ groups['calico-rr'] | default([]) }}"
   when:
-    - inventory_hostname == groups['kube-master'][0]
+    - inventory_hostname == groups['kube_control_plane'][0]
     - peer_with_calico_rr|default(false)
 
 - name: Calico | Create calico manifests
@@ -305,7 +305,7 @@
     - {name: calico, file: calico-crb.yml, type: clusterrolebinding}
   register: calico_node_manifests
   when:
-    - inventory_hostname in groups['kube-master']
+    - inventory_hostname in groups['kube_control_plane']
     - rbac_enabled or item.type not in rbac_resources
 
 - name: Calico | Create calico manifests for typha
@@ -316,7 +316,7 @@
     - {name: calico, file: calico-typha.yml, type: typha}
   register: calico_node_typha_manifest
   when:
-    - inventory_hostname in groups['kube-master']
+    - inventory_hostname in groups['kube_control_plane']
     - typha_enabled and calico_datastore == "kdd"
 
 - name: Start Calico resources
@@ -331,7 +331,7 @@
     - "{{ calico_node_manifests.results }}"
     - "{{ calico_node_typha_manifest.results }}"
   when:
-    - inventory_hostname == groups['kube-master'][0]
+    - inventory_hostname == groups['kube_control_plane'][0]
     - not item is skipped
   loop_control:
     label: "{{ item.item.file }}"
@@ -340,7 +340,7 @@
   wait_for:
     path: /etc/cni/net.d/calico-kubeconfig
   when:
-    - inventory_hostname not in groups['kube-master']
+    - inventory_hostname not in groups['kube_control_plane']
     - calico_datastore == "kdd"
 
 - name: Calico | Configure node asNumber for per node peering

roles/network_plugin/calico/tasks/pre.yml

@@ -22,6 +22,6 @@
   args:
     executable: /bin/bash
   register: calico_kubelet_name
-  delegate_to: "{{ groups['kube-master'][0] }}"
+  delegate_to: "{{ groups['kube_control_plane'][0] }}"
   when:
   - "cloud_provider is defined"

roles/network_plugin/calico/templates/calicoctl.kdd.sh.j2

@@ -1,6 +1,6 @@
 #!/bin/bash
 DATASTORE_TYPE=kubernetes \
-{% if inventory_hostname in groups['kube-master'] %}
+{% if inventory_hostname in groups['kube_control_plane'] %}
 KUBECONFIG=/etc/kubernetes/admin.conf \
 {% else %}
 KUBECONFIG=/etc/cni/net.d/calico-kubeconfig \