Check mode support added

README.md

@@ -21,8 +21,10 @@ This role has been tested on Ansible 2.7.0+ against the following Linux Distribu
   - Fedora 29
   - Fedora 30
   - Fedora 31
+  - Fedora 32
   - openSUSE Leap 15
   - Ubuntu 18.04 LTS
+  - Ubuntu 20.04 LTS
 
 ## Disclaimer
 

tasks/build/configure-k3s-cluster.yml

@@ -5,13 +5,19 @@
     path: "/var/lib/rancher/k3s/server/node-token"
   register: k3s_slurped_control_token
   delegate_to: "{{ k3s_control_delegate }}"
-  when: k3s_control_token is not defined
+  when: k3s_control_token is not defined and not ansible_check_mode
   become: "{{ k3s_become_for_kubectl | ternary(true, false, k3s_become_for_all) }}"
 
 - name: Ensure NODE_TOKEN is formatted correctly for use in templates
   set_fact:
     k3s_control_token: "{{ k3s_slurped_control_token.content | b64decode }}"
-  when: k3s_control_token is not defined
+  when: k3s_control_token is not defined and not ansible_check_mode
+
+- name: Ensure dummy NODE_TOKEN is defined for ansible_check_mode
+  set_fact:
+    k3s_control_token: "{{ k3s_control_delegate | to_uuid }}"
+  check_mode: false
+  when: k3s_control_token is not defined and ansible_check_mode
 
 - name: Ensure k3s service unit file is present
   template:
@@ -54,5 +60,5 @@
          and kubectl_get_nodes_result.stdout.find("NotReady") == -1
   retries: 30
   delay: 20
-  when: k3s_control_node and not k3s_no_flannel
+  when: k3s_control_node and not k3s_no_flannel and not ansible_check_mode
   become: "{{ k3s_become_for_kubectl | ternary(true, false, k3s_become_for_all) }}"

tasks/build/download-k3s.yml

@@ -4,17 +4,20 @@
   set_fact:
     k3s_arch: "{{ k3s_arch_lookup[ansible_architecture].arch }}"
     k3s_arch_suffix: "{{ k3s_arch_lookup[ansible_architecture].suffix }}"
+  check_mode: false
 
 - name: Ensure URLs are set as facts for downloading binaries
   set_fact:
     k3s_binary_url: "{{ k3s_github_download_url }}/{{ k3s_release_version }}/k3s{{ k3s_arch_suffix }}"
     k3s_hash_url: "{{ k3s_github_download_url }}/{{ k3s_release_version }}/sha256sum-{{ k3s_arch }}.txt"
+  check_mode: false
 
 - name: Ensure the k3s hashsum is downloaded
   uri:
     url: "{{ k3s_hash_url }}"
     return_content: true
   register: k3s_hash_sum_raw
+  check_mode: false
 
 - name: Ensure sha256sum is set from hashsum variable
   set_fact:
@@ -23,6 +26,7 @@
       reject('search', 'images') |
       first).split() | first }}"
   changed_when: false
+  check_mode: false
 
 - name: Ensure installation directory exists
   file:

tasks/build/get-version.yml

@@ -3,22 +3,26 @@
 - name: Ensure k3s_release_version is set to default if false
   set_fact:
     k3s_release_version: "{{ k3s_release_channel }}"
+  check_mode: false
   when: k3s_release_version is defined and not k3s_release_version
 
 - name: Ensure the default release channel is set
   set_fact:
     k3s_release_channel: "{{ k3s_release_version | default('stable') }}"
+  check_mode: false
 
 - name: Get the latest release version from k3s.io
   uri:
     url: "{{ k3s_api_releases }}"
     return_content: true
     body_format: json
   register: k3s_latest_release
+  check_mode: false
 
 - name: Ensure the release version is set as a fact
   set_fact:
     k3s_release_version: "{{ item.latest }}"
   loop: "{{ k3s_latest_release.json.data }}"
+  check_mode: false
   when: item.name == k3s_release_channel
         and item.type == "channel"

tasks/build/install-k3s.yml

@@ -5,8 +5,8 @@
     src: "{{ k3s_install_dir }}/k3s-{{ k3s_release_version }}"
     dest: "{{ k3s_install_dir }}/k3s"
     state: link
-  when: (k3s_control_node and k3s_controller_count | length == 1)
-        or (k3s_primary_control_node and k3s_controller_count | length > 1)
+  when: ((k3s_control_node and k3s_controller_count | length == 1)
+        or (k3s_primary_control_node and k3s_controller_count | length > 1)) and not ansible_check_mode
   notify:
     - restart k3s
   become: "{{ k3s_become_for_install_dir | ternary(true, false, k3s_become_for_all) }}"
@@ -56,6 +56,7 @@
     - kubectl
     - crictl
     - ctr
+  when: not ansible_check_mode
   become: "{{ k3s_become_for_install_dir | ternary(true, false, k3s_become_for_all) }}"
 
 - name: Ensure k3s control plane is started

tasks/build/preconfigure-k3s.yml

@@ -48,23 +48,27 @@
     create: true
     regexp: "^{{ item }} @@@ {{ hostvars[item].ansible_host | default(hostvars[item].ansible_fqdn) }}"
   loop: "{{ play_hosts }}"
+  check_mode: false
   when: hostvars[item].k3s_control_node is defined
 
 - name: Delegate a master control plane node
   block:
     - name: Lookup control node from file
       command: "grep '{{ 'P_True' if (k3s_controller_count | length > 1) else 'C_True' }}' /tmp/inventory.txt"
       changed_when: false
+      check_mode: false
       register: k3s_control_delegate_raw
 
     - name: Ensure control node is delegated to for obtaining a token
       set_fact:
         k3s_control_delegate: "{{ k3s_control_delegate_raw.stdout.split(' @@@ ')[0] }}"
+      check_mode: false
       when: k3s_control_delegate is not defined
 
     - name: Ensure the control node address is registered in Ansible
       set_fact:
         k3s_control_node_address: "{{ hostvars[k3s_control_delegate].ansible_host | default(hostvars[k3s_control_delegate].ansible_fqdn) }}"
+      check_mode: false
       when: k3s_control_node_address is not defined
 
   when: k3s_control_node_address is not defined

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

@@ -41,3 +41,4 @@
   when: k3s_check_kubectl.stat.exists is defined
         and k3s_check_kubectl.stat.exists
         and k3s_control_delegate is defined
+        and not ansible_check_mode