Moved set_facts on dedicated task file. Dynamically render kubeadm-init.yml based on k8s major version. Updated example playbook

Author: garutilorenzo

examples/site.yaml

@@ -1,4 +1,15 @@
 ---
+
+- hosts: kubernetes
+  become: yes
+  remote_user: vagrant
+  tasks:
+    - ansible.builtin.import_role:
+        name: ansible-role-linux-kubernetes
+        tasks_from: set_custom_fact
+  vars_files:
+    - vars.yaml
+
 - hosts: kubemaster
   become: yes
   remote_user: vagrant

tasks/init_cluster.yml

@@ -4,25 +4,6 @@
   ansible.builtin.shell: kubectl get nodes
   ignore_errors: true
   register: cluster_exist
-
-- ansible.builtin.set_fact:
-    kubernetes_init: "{% if kubernetes_init_host is defined and  kubernetes_init_host == inventory_hostname %}yes{% else %}no{% endif %}"
-
-- ansible.builtin.set_fact:
-    kubernetes_ip_address: "{{ item }}"
-  when: 
-    - ansible_interfaces | length > 2
-    - kubernetes_vip_ip is defined
-    - "item | ansible.utils.ipaddr( kubernetes_subnet )"
-  with_items: "{{ ansible_all_ipv4_addresses | difference([kubernetes_vip_ip]) }}"
-
-- ansible.builtin.set_fact:
-    kubernetes_ip_address: "{{ hostvars[inventory_hostname]['ansible_default_ipv4']['address'] }}"
-  when: 
-    - ansible_interfaces | length <= 2
-
-- ansible.builtin.set_fact:
-    kubernetes_image_repository: "registry.k8s.io"
 
 - block:
 

tasks/join_cluster.yml

@@ -1,14 +1,9 @@
 ---
 
-- name: Check if /var/lib/kubelet directory exist
+- name: Check if /var/lib/kubelet/config.yaml file exist
   ansible.builtin.stat:
-    path: /var/lib/kubelet
-  register: kubelet_dir
-
-- ansible.builtin.set_fact:
-    kubernetes_ip_address: "{{ item }}"
-  when: "item | ansible.utils.ipaddr( kubernetes_subnet )"
-  with_items: "{{ ansible_all_ipv4_addresses | difference([kubernetes_vip_ip]) }}"
+    path: /var/lib/kubelet/config.yaml
+  register: kubelet_config_file
 
 - ansible.builtin.set_fact:
     api_server_endpoint: "{% if groups['kubemaster'] | length > 1 %}{{ kubernetes_vip_ip }}{% else %}{{ hostvars[groups['kubemaster'][0]]['kubernetes_ip_address'] }}{% endif %}"
@@ -94,8 +89,8 @@
         remote_src: yes
   when:
     - inventory_hostname in groups['kubemaster']
-    - kubelet_dir.stat.exists is defined 
-    - kubelet_dir.stat.exists == False
+    - kubelet_config_file.stat.exists is defined 
+    - kubelet_config_file.stat.exists == False
   ignore_errors: "{{ ansible_check_mode }}"
 
 - block:
@@ -110,6 +105,6 @@
       changed_when: kubeadm_join is success
   when:
     - inventory_hostname in groups['kubeworker']
-    - kubelet_dir.stat.exists is defined 
-    - kubelet_dir.stat.exists == False
+    - kubelet_config_file.stat.exists is defined 
+    - kubelet_config_file.stat.exists == False
   ignore_errors: "{{ ansible_check_mode }}"

tasks/main.yml

@@ -1,5 +1,11 @@
 ---
 
+- include_tasks: 
+    file: set_custom_fact.yml
+    apply:
+      tags: always
+  tags: always
+
 - include_tasks: 
     file: "{{ item }}"
     apply:

tasks/set_custom_fact.yml

@@ -0,0 +1,40 @@
+---
+
+- ansible.builtin.set_fact:
+    kubernetes_init: "{% if kubernetes_init_host is defined and  kubernetes_init_host == inventory_hostname %}yes{% else %}no{% endif %}"
+    kubernetes_major: "{{ kubernetes_version | regex_replace('^([0-9]+\\.[0-9]+)\\..*', '\\1') }}"
+
+- ansible.builtin.set_fact:
+    kubernetes_api_version: kubeadm.k8s.io/v1beta4
+  when: kubernetes_major is ansible.builtin.version('1.31','>=')
+
+- ansible.builtin.set_fact:
+    kubernetes_api_version: kubeadm.k8s.io/v1beta3
+  when: kubernetes_major is ansible.builtin.version('1.31', '<')
+
+- ansible.builtin.set_fact:
+    kubernetes_ip_address: "{{ item }}"
+  when: 
+    - ansible_interfaces | length > 2
+    - kubernetes_vip_ip is defined
+    - "item | ansible.utils.ipaddr( kubernetes_subnet )"
+  with_items: "{{ ansible_all_ipv4_addresses | difference([kubernetes_vip_ip]) }}"
+
+- ansible.builtin.set_fact:
+    kubernetes_ip_address: "{{ hostvars[inventory_hostname]['ansible_default_ipv4']['address'] }}"
+  when: 
+    - ansible_interfaces | length <= 2
+
+- ansible.builtin.set_fact:
+    kubernetes_iface: "{{ hostvars[inventory_hostname]['ansible_' + item ]['device'] }}"
+  when: 
+    - ansible_interfaces | length > 2
+    - kubernetes_vip_ip is defined
+    - hostvars[inventory_hostname]['ansible_' + item ].ipv4 is defined 
+    - hostvars[inventory_hostname]['ansible_' + item ]['ipv4']['address'] | ansible.utils.ipaddr( kubernetes_subnet )
+  with_items: "{{ ansible_interfaces }}"
+
+- ansible.builtin.set_fact:
+    kubernetes_iface: "{{ hostvars[inventory_hostname]['ansible_default_ipv4']['interface'] }}"
+  when: 
+    - ansible_interfaces | length <= 2

tasks/setup_repo_Debian.yml

@@ -1,8 +1,5 @@
 ---
 
-- ansible.builtin.set_fact:
-    kubernetes_major: "{{ kubernetes_version | regex_replace('^([0-9]+\\.[0-9]+)\\..*', '\\1') }}"
-
 - name: Install required system packages
   ansible.builtin.apt: 
     name: 
@@ -32,16 +29,20 @@
     line: deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.key] https://pkgs.k8s.io/core:/stable:/v{{ kubernetes_major }}/deb/ /
     create: yes
 
-- name: Add Docker GPG apt Key
-  ansible.builtin.apt_key:
-    url: https://download.docker.com/linux/ubuntu/gpg
-    state: present
+- name: Add Docker Repository key
+  ansible.builtin.get_url:
+    url:  https://download.docker.com/linux/ubuntu/gpg
+    dest: /etc/apt/keyrings/docker.asc
 
-- shell: lsb_release -cs
+- shell: . /etc/os-release && echo "$VERSION_CODENAME"
   register: lsb_release
 
+- shell: dpkg --print-architecture
+  register: deb_architecture
+
 - name: Add Docker Repository
-  ansible.builtin.apt_repository:
-    repo: deb https://download.docker.com/linux/ubuntu {{ lsb_release.stdout }} stable
-    state: present
-  ignore_errors: "{{ ansible_check_mode }}"
+  ansible.builtin.lineinfile:
+    path: /etc/apt/sources.list.d/docker.list
+    regexp: '^deb'
+    line: deb [arch={{ deb_architecture.stdout }} signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu {{ lsb_release.stdout }} stable
+    create: yes

tasks/setup_repo_RedHat.yml

@@ -1,8 +1,5 @@
 ---
 
-- ansible.builtin.set_fact:
-    kubernetes_major: "{{ kubernetes_version | regex_replace('^([0-9]+\\.[0-9]+)\\..*', '\\1') }}"
-
 - name: Install required system packages
   ansible.builtin.dnf: 
     name: 

templates/kubeadm-init.yml.j2

@@ -1,5 +1,5 @@
 ---
-apiVersion: kubeadm.k8s.io/v1beta4
+apiVersion: {{ kubernetes_api_version }}
 bootstrapTokens:
 - groups:
   - system:bootstrappers:kubeadm:default-node-token
@@ -20,6 +20,7 @@ nodeRegistration:
   taints:
   - effect: NoSchedule
     key: node-role.kubernetes.io/control-plane
+{% if kubernetes_api_version == 'kubeadm.k8s.io/v1beta4' %}
 timeouts:
   controlPlaneComponentHealthCheck: 4m0s
   discovery: 5m0s
@@ -28,13 +29,17 @@ timeouts:
   kubernetesAPICall: 1m0s
   tlsBootstrap: 5m0s
   upgradeManifests: 5m0s
+{% endif %}
 ---
 apiServer:
+{% if kubernetes_api_version == 'kubeadm.k8s.io/v1beta3' %}
+  timeoutForControlPlane: 4m0s
+{% endif %}
   certSANs: 
 {% for san in apiserver_sans %}
   - "{{ san }}"
 {% endfor %}
-apiVersion: kubeadm.k8s.io/v1beta4
+apiVersion: {{ kubernetes_api_version }}
 certificatesDir: /etc/kubernetes/pki
 clusterName: kubernetes
 controllerManager: {}
@@ -45,13 +50,17 @@ kubernetesVersion: {{ kubernetes_version }}
 {% if groups['kubemaster'] | length > 1  %}
 controlPlaneEndpoint: {{ kubernetes_vip_ip }}:{{ kubernetes_api_port }}
 {% endif %}
+{% if kubernetes_api_version == 'kubeadm.k8s.io/v1beta4' %}
 caCertificateValidityPeriod: 87600h0m0s
 certificateValidityPeriod: 8760h0m0s
+{% endif %}
 networking:
   dnsDomain: {{ kubernetes_dns_domain }}
   podSubnet: {{ kubernetes_pod_subnet }}
   serviceSubnet: {{ kubernetes_service_subnet }}
+{% if kubernetes_api_version == 'kubeadm.k8s.io/v1beta4' %}
 proxy: {}
+{% endif %}
 scheduler: {}
 etcd:
   local:

templates/kubeadm-join-master.yml.j2

@@ -1,5 +1,5 @@
 ---
-apiVersion: kubeadm.k8s.io/v1beta4
+apiVersion: {{ kubernetes_api_version }}
 kind: JoinConfiguration
 discovery:
   bootstrapToken:

templates/kubeadm-join-worker.yml.j2

@@ -1,5 +1,5 @@
 ---
-apiVersion: kubeadm.k8s.io/v1beta4
+apiVersion: {{ kubernetes_api_version }}
 kind: JoinConfiguration
 discovery:
   bootstrapToken: