Add kubectl / oc-specific API server version logic

installer/roles/kubernetes/tasks/kubernetes.yml

@@ -12,3 +12,12 @@
   set_fact:
     postgresql_service_name: "{{ kubernetes_deployment_name }}-postgresql"
   when: "pg_hostname is not defined or pg_hostname == ''"
+
+- name: Get Kubernetes API version
+  command: |
+    kubectl version -o json
+  register: kube_version
+
+- name: Extract server version from command output
+  set_fact:
+    kube_api_version: "{{ (kube_version.stdout | from_json).serverVersion.gitVersion[1:] }}"