Added the ability to set k3s_release_version as a release channel

README.md

@@ -46,7 +46,7 @@ consistency.
 | Variable                         | Description                                                                         | Default Value                           |
 |----------------------------------|-------------------------------------------------------------------------------------|-----------------------------------------|
 | `k3s_cluster_state`              | State of cluster: installed, started, stopped, restarted, downloaded, uninstalled.  | installed                               |
-| `k3s_release_version`            | Use a specific version of k3s, eg. `v0.2.0`. Specify `false` for latest.            | `false`                                 |
+| `k3s_release_version`            | Use a specific version of k3s, eg. `v0.2.0`. Specify `false` for stable.            | `false`                                 |
 | `k3s_build_cluster`              | When multiple `play_hosts` are available, attempt to cluster. Read notes below.     | `true`                                 |
 | `k3s_github_url`                 | Set the GitHub URL to install k3s from.                                             | https://github.com/rancher/k3s          |
 | `k3s_install_dir`                | Installation directory for k3s.                                                     | `/usr/local/bin`                        |
@@ -89,12 +89,23 @@ consistency.
 
 #### Important note about `k3s_release_version`
 
-If you do not set a `k3s_release_version` the latest version of k3s will be
+If you do not set a `k3s_release_version` the latest version from the stable
-installed. If you are developing against a specific version of k3s you must
+channel of k3s will be installed. If you are developing against a specific
-ensure this is set in your Ansible configuration, eg:
+version of k3s you must ensure this is set in your Ansible configuration, eg:
 
 ```yaml
-k3s_release_version: v0.2.0
+k3s_release_version: v1.16.9+k3s1
+```
+
+It is also possible to install specific K3s "Channels", below are some
+examples for `k3s_release_version`:
+
+```yaml
+k3s_release_version: false          # defaults to 'stable' channel
+k3s_release_version: stable         # latest 'stable' release
+k3s_release_version: testing        # latest 'testing' release
+k3s_release_version: v1.18          # latest v1.18 release
+k3s_release_version: v1.17-testing  # latest v1.17 testing release
 ```
 
 #### Important note about `k3s_build_cluster`

tasks/build/get-version.yml

@@ -1,12 +1,24 @@
 ---
 
-- name: Get the latest release version from GitHub
+- name: Ensure k3s_release_version is set to default if false
+  set_fact:
+    k3s_release_version: "{{ k3s_release_channel }}"
+  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') }}"
+
+- name: Get the latest release version from k3s.io
   uri:
-    url: "{{ k3s_github_api_releases }}"
+    url: "{{ k3s_api_releases }}"
     return_content: true
     body_format: json
   register: k3s_latest_release
 
 - name: Ensure the release version is set as a fact
   set_fact:
-    k3s_release_version: "{{ k3s_latest_release.json.tag_name }}"
+    k3s_release_version: "{{ item.latest }}"
+  loop: "{{ k3s_latest_release.json.data }}"
+  when: item.name == k3s_release_channel
+        and item.type == "channel"

tasks/state-installed.yml

@@ -7,7 +7,9 @@
 - import_tasks: teardown/drain-and-remove-nodes.yml
 
 - import_tasks: build/get-version.yml
-  when: k3s_release_version is not defined or not k3s_release_version
+  when: k3s_release_version is not defined
+        or not k3s_release_version
+        or k3s_release_version is not regex('\\+k3s[1-9]$')
 
 - import_tasks: validate/main.yml
 

vars/main.yml

@@ -26,8 +26,10 @@ k3s_arch_lookup:
     arch: arm
     suffix: "-armhf"
 
+k3s_release_channel: stable
 k3s_github_api: "{{ k3s_github_url | replace('github.com', 'api.github.com') }}"
 k3s_github_api_releases: "{{ k3s_github_api | replace('.com', '.com/repos') }}/releases/latest"
+k3s_api_releases: https://update.k3s.io/v1-release/channels
 k3s_github_download_url: "{{ k3s_github_url }}/releases/download"
 k3s_controller_count: []