ibmcloud: replace k8s source list

use k8s owned apt repo
add kube_version variable

Signed-off-by: Yan Song Liu <lysliu@cn.ibm.com>

ibmcloud/cluster/README.md

@@ -100,6 +100,7 @@ twice under different SSHs key names. This key needs to be password-less and on
 plane node and the rest will be worker nodes. If not set it defaults to `2`.
 > - `containerd_version` (optional) is the version of containerd installed on the Kubernetes nodes. If not set it 
 defaults to `1.7.0-beta.3`.
+> - `kube_version` (optional) is the version of kubeadmin and cluster. If not set it defaults to `1.28`.
  <!-- TODO #570 once we've fixed pre-install of containerd note that this might be overriden?-->
 
 > **Hint:** In order to create a cluster based on a different type of VSI image you can use the `instance_profile_name`

ibmcloud/cluster/ansible/tasks/k8s.yaml

@@ -6,12 +6,12 @@
 ---
 - name: "Add gpg key "
   apt_key:
-    url: https://packages.cloud.google.com/apt/doc/apt-key.gpg
+    url: https://pkgs.k8s.io/core:/stable:/v{{ kube_version }}/deb/Release.key
     state: present
 
 - name: "Add kubernetes source list "
   apt_repository:
-    repo: "deb http://packages.cloud.google.com/apt/ kubernetes-xenial main"
+    repo: "deb https://pkgs.k8s.io/core:/stable:/v{{ kube_version }}/deb/ /"
     state: present
     filename: "kubernetes"
 

ibmcloud/cluster/main.tf

@@ -86,7 +86,7 @@ resource "null_resource" "ansible" {
   }
   provisioner "local-exec" {
     working_dir = "./ansible"
-    command     = "ansible-playbook -i inventory -u root containerd.yaml -e containerd_release_version=${var.containerd_version}"
+    command     = "ansible-playbook -i inventory -u root containerd.yaml -e containerd_release_version=${var.containerd_version} -e kube_version=${var.kube_version}"
   }
 }
 

ibmcloud/cluster/variables.tf

@@ -57,3 +57,7 @@ variable "zone" {
 variable "containerd_version" {
   default = "1.7.0-beta.3"
 }
+
+variable "kube_version" {
+  default = "1.28"
+}