Cluster-init checks added, tidy up of task format

.github/stale.yml

@@ -0,0 +1,18 @@
+---
+# Number of days of inactivity before an issue becomes stale
+daysUntilStale: 60
+# Number of days of inactivity before a stale issue is closed
+daysUntilClose: 7
+# Issues with these labels will never be considered stale
+exemptLabels:
+  - pinned
+  - security
+# Label to use when marking an issue as stale
+staleLabel: wontfix
+# Comment to post when marking an issue as stale. Set to `false` to disable
+markComment: >
+  This issue has been automatically marked as stale because it has not had
+  recent activity. It will be closed if no further activity occurs. Thank you
+  for your contributions.
+# Comment to post when closing a stale issue. Set to `false` to disable
+closeComment: false

CHANGELOG.md

@@ -14,6 +14,16 @@
 ---
 -->
 
+## 2021-02-27, v2.7.0
+
+### Notable changes
+
+  - Cluster init checks added.
+  - Tidy up of tasks, failed checks.
+  - Possible fix for #93 - force draining of nodes added.
+
+---
+
 ## 2021-02-27, v2.6.1
 
 ### Notable changes
@@ -21,6 +31,8 @@
   - Bugfix: Templating error for single control plane nodes using Etcd.
   - Bugfix: a number of typos fixed.
 
+---
+
 ## 2021-02-16, v2.6.0
 
 ### Notable changes

handlers/main.yml

@@ -14,6 +14,10 @@
     enabled: "{{ k3s_start_on_boot }}"
   retries: 3
   delay: 3
+  register: k3s_systemd_restart_k3s
+  failed_when:
+    - k3s_systemd_restart_k3s is not success
+    - not ansible_check_mode
   become: "{{ k3s_become_for_systemd | ternary(true, false, k3s_become_for_all) }}"
 
 - name: restart docker
@@ -21,4 +25,8 @@
     name: docker
     state: restarted
     enabled: true
+  register: k3s_systemd_restart_docker
+  failed_when:
+    - k3s_systemd_restart_docker is not success
+    - not ansible_check_mode
   become: "{{ k3s_become_for_systemd | ternary(true, false, k3s_become_for_all) }}"

tasks/build/configure-k3s-cluster.yml

@@ -65,6 +65,9 @@
     state: started
     enabled: "{{ k3s_start_on_boot }}"
   register: ensure_secondary_controllers_started
+  failed_when:
+    - ensure_secondary_controllers_started is not succeeded
+    - not ansible_check_mode
   until: ensure_secondary_controllers_started is succeeded
   retries: "{{ ansible_play_hosts_all | length }}"
   delay: 5

tasks/build/get-version.yml

@@ -19,6 +19,7 @@
     return_content: true
     body_format: json
   register: k3s_latest_release
+  no_log: true
   check_mode: false
 
 - name: Ensure the release version is set as a fact

tasks/build/install-k3s.yml

@@ -22,6 +22,10 @@
     state: started
     enabled: "{{ k3s_start_on_boot }}"
     scope: "{{ k3s_systemd_context }}"
+  register: k3s_systemd_start_k3s
+  failed_when:
+    - k3s_systemd_start_k3s is not succeeded
+    - not ansible_check_mode
   when: (k3s_control_node and k3s_controller_list | length == 1)
         or (k3s_primary_control_node and k3s_controller_list | length > 1)
   become: "{{ k3s_become_for_systemd | ternary(true, false, k3s_become_for_all) }}"

tasks/build/preconfigure-k3s.yml

@@ -22,7 +22,7 @@
     k3s_control_plane_port: "{{ k3s_runtime_config['https-listen-port'] | default(6443) }}"
   delegate_to: k3s_primary_control_node
 
-- name: Ensure a count of control nodes is generated
+- name: Ensure a count of control nodes is generated from ansible_play_hosts_all
   ansible.builtin.set_fact:
     k3s_controller_list: "{{ k3s_controller_list + [ item ] }}"
   when:
@@ -79,7 +79,7 @@
   check_mode: false
   when: hostvars[item].k3s_control_node is defined
 
-- name: Delegate a control plane node
+- name: Delegate an initializing control plane node
   block:
     - name: Lookup control node from file
       ansible.builtin.command: "grep '{{ 'P_True' if (k3s_controller_list | length > 1) else 'C_True' }}' /tmp/inventory.txt"
@@ -87,7 +87,7 @@
       check_mode: false
       register: k3s_control_delegate_raw
 
-    - name: Ensure control node is delegated to for obtaining a token
+    - name: Ensure control node is delegated for obtaining a cluster token
       ansible.builtin.set_fact:
         k3s_control_delegate: "{{ k3s_control_delegate_raw.stdout.split(' @@@ ')[0] }}"
       check_mode: false

tasks/state-installed.yml

@@ -40,6 +40,11 @@
 
 - import_tasks: build/install-k3s.yml
 
+- include_tasks: validate/configuration/cluster-init.yml
+  when:
+    - k3s_control_delegate is defined
+    - k3s_control_delegate == inventory_hostname
+
 - import_tasks: build/configure-k3s-cluster.yml
   when:
     - k3s_build_cluster is defined

tasks/teardown/drain-and-remove-nodes.yml

@@ -19,7 +19,11 @@
       become: "{{ k3s_become_for_kubectl | ternary(true, false, k3s_become_for_all) }}"
 
     - name: Ensure uninstalled nodes are drained
-      ansible.builtin.command: "{{ k3s_install_dir }}/kubectl drain {{ item }} --ignore-daemonsets --delete-local-data"
+      ansible.builtin.command: >-
+        {{ k3s_install_dir }}/kubectl drain {{ item }}
+          --ignore-daemonsets
+          --delete-local-data
+          --force
       delegate_to: "{{ k3s_control_delegate }}"
       run_once: true
       when:

tasks/validate/configuration/cluster-init.yml

@@ -0,0 +1,18 @@
+---
+
+- name: Check that the initial control plane server is available to accept connections
+  ansible.builtin.wait_for:
+    port: "{{ k3s_runtime_config['https-listen-port'] | default('6443') }}"
+    host: "{{ k3s_runtime_config['bind-address'] | default('127.0.0.1') }}"
+    delay: 5
+    sleep: 5
+    timeout: 300
+
+- name: Check that cluster-token exists
+  ansible.builtin.stat:
+    path: "{{ k3s_runtime_config['data-dir'] | default(k3s_data_dir) }}/server/token"
+  register: k3s_check_cluster_token
+  check_mode: false
+  failed_when:
+    - not k3s_check_cluster_token.stat.exists
+    - not ansible_check_mode

tasks/validate/configuration/control-node-count.yml

@@ -7,7 +7,9 @@
       - ("datastore-endpoint" not in k3s_runtime_config or not k3s_runtime_config['datastore-endpoint'])
       - (k3s_etcd_datastore is not defined or not k3s_etcd_datastore)
     success_msg: "Control plane configuration is valid."
-    fail_msg: "Control plane configuration is invalid. Please see notes about k3s_control_node and HA in README.md."
+    fail_msg: >-
+      Control plane configuration is invalid.
+      Please see notes about k3s_control_node and HA in README.md.
   when:
     - k3s_controller_list | length == 1
     - not k3s_use_unsupported_config
@@ -20,7 +22,9 @@
       - (("datastore-endpoint" in k3s_runtime_config and k3s_runtime_config['datastore-endpoint'])
           or (k3s_etcd_datastore is defined and k3s_etcd_datastore))
     success_msg: "Control plane configuration is valid."
-    fail_msg: "Control plane configuration is invalid. Please see notes about k3s_control_node and HA in README.md."
+    fail_msg: >-
+      Control plane configuration is invalid. Please see notes about
+      k3s_control_node and HA in README.md.
   when:
     - k3s_controller_list | length >= 2
     - k3s_control_node
@@ -31,7 +35,9 @@
       - (k3s_controller_list | length >= 3)
       - (((k3s_controller_list | length) % 2) == 1)
     success_msg: "Control plane configuration is valid."
-    fail_msg: "Etcd should have a minimum of 3 defined members and the number of members should be odd. Please see notes about HA in README.md"
+    fail_msg: >-
+      Etcd should have a minimum of 3 defined members and the number of
+      members should be odd. Please see notes about HA in README.md
   when:
     - k3s_etcd_datastore is defined
     - k3s_etcd_datastore

tasks/validate/configuration/variables.yml

@@ -7,7 +7,7 @@
     success_msg: "{{ k3s_release_version }} is supported by this role."
     fail_msg: "{{ k3s_release_version }} is not supported by this role, please use xanmanning.k3s v1.x."
 
-- name: Check configuration in k3s_server and k3s_agent that needs special configuration
+- name: Check configuration in k3s_server and k3s_agent that needs alternate configuration
   ansible.builtin.assert:
     that:
       - (item.setting not in k3s_runtime_config)

tasks/validate/environment/local/packages.yml

@@ -6,7 +6,7 @@
       - ansible_version.string is version_compare(k3s_ansible_min_version, '>=')
     fail_msg: >-
       Ansible v{{ ansible_version.string }} is not supported by this role.
-      Please install >= v{{ k3s_ansible_min_version }}
+      Please install >= v{{ k3s_ansible_min_version }}.
     success_msg: "Ansible v{{ ansible_version.string }} is supported."
   become: false
   delegate_to: localhost

tasks/validate/state/uninstalled.yml

@@ -2,31 +2,23 @@
 
 - name: Check that k3s is not running
   ansible.builtin.command: pgrep k3s
-  ignore_errors: true
+  failed_when:
+    - check_k3s_process.rc == 0
+    - not ansible_check_mode
   changed_when: false
   register: check_k3s_process
 
-- name: Fail if k3s is still running
-  ansible.builtin.fail:
-    msg: k3s is still running, uninstall script failed. Please investigate.
-  when: check_k3s_process.rc == 0
-
 - name: Check that docker is not running
   ansible.builtin.command: pgrep docker
-  ignore_errors: true
+  failed_when:
+    - check_k3s_docker_process.rc == 0
+    - not ansible_check_mode
   changed_when: false
   register: check_k3s_docker_process
   when:
     - k3s_runtime_config.docker is defined
     - k3s_runtime_config.docker
 
-- name: Fail if docker is still running
-  ansible.builtin.fail:
-    msg: docker is still running, uninstall script failed. Please investigate.
-  when:
-    - k3s_runtime_config.docker is defined
-    - k3s_runtime_config.docker
-
 - name: Fail if k3s binaries have not been removed
   ansible.builtin.stat:
     path: "{{ k3s_install_dir }}/{{ item }}"