[ci] Pin k3s to v1.23.6+k3s1 (kubernetes#1907) (kubernetes#1921)

This PR pinns k3s to v1.23.6+k3s1. We stick with that as long as we
can't reliably say that newer versions work well enough for us.
In the future, we must change code for k3s-v1.24.0 anywayse, because
docker is not supported there anyways. Until we change away from docker
we can't update to v1.24.

Author: chrigl

tests/playbooks/roles/install-k3s/defaults/main.yaml

@@ -1,5 +1,5 @@
 ---
-k8s_branch: "master"
+k3s_release: "v1.23.6+k3s1"
 worker_node_count: 1
 cluster_token: "9a08jv.c0izixklcxtmnze7"
 devstack_workdir: "{{ ansible_user_dir }}/devstack"
@@ -8,4 +8,4 @@ sg_name: "k3s_sg"
 keypair_name: "k3s_keypair"
 image_url: "https://cloud-images.ubuntu.com/releases/focal/release/ubuntu-20.04-server-cloudimg-amd64.img"
 image_name: "ubuntu-focal"
-master_port_name: "k3s_master"
+master_port_name: "k3s_master"

tests/playbooks/roles/install-k3s/tasks/main.yaml

@@ -7,23 +7,6 @@
     packages:
       - jq
 
-- name: Get k3s release
-  shell:
-    executable: /bin/bash
-    cmd: |
-      # Get k3s release based on the given k8s branch.
-      branch={{ k8s_branch }}
-      if [[ "$branch" = "master" ]]; then
-        k3s_release=$(curl -s "https://api.github.com/repos/k3s-io/k3s/tags" | jq -r '.[0].name')
-      else
-        # release-1.20 --> 1.20
-        k8s_minor=${branch##*-}
-        # 1.20 --> v1.20.x+k3s1 or v1.20.1-rc1+k3s1
-        k3s_release=$(curl -s "https://api.github.com/repos/k3s-io/k3s/tags" | jq -r '.[].name' | grep -E "^v${k8s_minor}.[0-9a-z\+\-]+\+k3s1$" | awk 'NR==1 {print}')
-      fi
-      echo $k3s_release
-  register: release
-
 - name: Create openstack resources
   shell:
     executable: /bin/bash
@@ -98,8 +81,8 @@
         runcmd:
           - curl -sSL https://get.docker.com/ | sh
           - mkdir -p /var/lib/rancher/k3s/agent/images/
-          - curl -sSL https://github.com/k3s-io/k3s/releases/download/{{ release.stdout }}/k3s-airgap-images-amd64.tar -o /var/lib/rancher/k3s/agent/images/k3s-airgap-images.tar
-          - curl -sSL https://github.com/k3s-io/k3s/releases/download/{{ release.stdout }}/k3s -o /usr/local/bin/k3s
+          - curl -sSL https://github.com/k3s-io/k3s/releases/download/{{ k3s_release }}/k3s-airgap-images-amd64.tar -o /var/lib/rancher/k3s/agent/images/k3s-airgap-images.tar
+          - curl -sSL https://github.com/k3s-io/k3s/releases/download/{{ k3s_release }}/k3s -o /usr/local/bin/k3s
           - curl -sSL https://get.k3s.io -o /var/lib/rancher/k3s/install.sh
           - chmod u+x /var/lib/rancher/k3s/install.sh /usr/local/bin/k3s
           - INSTALL_K3S_SKIP_DOWNLOAD=true /var/lib/rancher/k3s/install.sh --docker --disable traefik --disable metrics-server --disable servicelb --disable-cloud-controller --kubelet-arg="cloud-provider=external" --tls-san {{ k3s_fip }} --token {{ cluster_token }}
@@ -194,4 +177,4 @@
 
 - name: Merge KUBECONFIG env vars into global env
   set_fact:
-    global_env: "{{ global_env | combine({'KUBECONFIG': kubeconfig}) }}"
+    global_env: "{{ global_env | combine({'KUBECONFIG': kubeconfig}) }}"

tests/playbooks/test-csi-cinder-e2e.yaml

@@ -20,7 +20,7 @@
         - cinder
     - role: install-k3s
       worker_node_count: 0
-      k8s_branch: release-1.23
+      k3s_release: v1.23.6+k3s1
     - role: install-docker
     - role: install-docker-registry
       cert_hosts: ' ["{{ ansible_default_ipv4.address }}"]'

tests/playbooks/test-csi-manila-e2e.yaml

@@ -19,7 +19,7 @@
         - manila
     - role: install-k3s
       worker_node_count: 0
-      k8s_branch: release-1.23
+      k3s_release: v1.23.6+k3s1
     - role: install-docker
     - role: install-docker-registry
       cert_hosts: ' ["{{ ansible_default_ipv4.address }}"]'

tests/playbooks/test-occm-e2e.yaml

@@ -21,7 +21,7 @@
         - barbican
     - role: install-k3s
       worker_node_count: 0
-      k8s_branch: release-1.23
+      k3s_release: v1.23.6+k3s1
     - role: install-docker
     - role: install-docker-registry
       cert_hosts: ' ["{{ ansible_default_ipv4.address }}"]'