Move to Ansible 3.4.0 (#7672)

* Ansible: move to Ansible 3.4.0 which uses ansible-base 2.10.10

* Docs: add a note about ansible upgrade post 2.9.x

* CI: ensure ansible is removed before ansible 3.x is installed to avoid pip failures

* Ansible: use newer ansible-lint

* Fix ansible-lint 5.0.11 found issues

* syntax issues
* risky-file-permissions
* var-naming
* role-name
* molecule tests

* Mitogen: use 0.3.0rc1 which adds support for ansible 2.10+

* Pin ansible-base to 2.10.11 to get package fix on RHEL8

roles/kubernetes/control-plane/tasks/kubeadm-setup.yml

@@ -50,18 +50,21 @@
   file:
     path: "{{ audit_policy_file | dirname }}"
     state: directory
+    mode: 0640
   when: kubernetes_audit|default(false) or kubernetes_audit_webhook|default(false)
 
 - name: Write api audit policy yaml
   template:
     src: apiserver-audit-policy.yaml.j2
     dest: "{{ audit_policy_file }}"
+    mode: 0640
   when: kubernetes_audit|default(false) or kubernetes_audit_webhook|default(false)
 
 - name: Write api audit webhook config yaml
   template:
     src: apiserver-audit-webhook-config.yaml.j2
     dest: "{{ audit_webhook_config_file }}"
+    mode: 0640
   when: kubernetes_audit_webhook|default(false)
 
 # Nginx LB(default), If kubeadm_config_api_fqdn is defined, use other LB by kubeadm controlPlaneEndpoint.