refactor(k3s): enhance kubeconfig generation and token management

Signed-off-by: Tuan-Dat Tran <tuan-dat.tran@tudattr.dev>

roles/k3s_server/tasks/installation.yml

@@ -1,79 +1,22 @@
 ---
-- name: See if k3s file exists
-  ansible.builtin.stat:
-    path: /usr/local/bin/k3s
-  register: k3s_status
-
 - name: Download K3s install script to /tmp/
-  when: not k3s_status.stat.exists
   ansible.builtin.get_url:
     url: https://get.k3s.io
     dest: /tmp/k3s_install.sh
     mode: "0755"
 
 - name: Install K3s server with node taint and TLS SAN
-  when: (ansible_default_ipv4.address == k3s_primary_server_ip and (not k3s_status.stat.exists))
+  when: (ansible_default_ipv4.address == k3s_primary_server_ip)
   ansible.builtin.command: |
     /tmp/k3s_install.sh server \
     --node-taint CriticalAddonsOnly=true:NoExecute \
     --tls-san {{ hostvars['k3s-loadbalancer'].ansible_default_ipv4.address }}
     --tls-san {{ k3s_server_name }}
   become: true
-  async: 300
-  poll: 0
   register: k3s_primary_install
 
-- name: Wait for K3s to be installed
-  when: (ansible_default_ipv4.address == k3s_primary_server_ip and (not k3s_status.stat.exists))
-  ansible.builtin.async_status:
-    jid: "{{ k3s_primary_install.ansible_job_id }}"
-  register: k3s_primary_install_status
-  until: k3s_primary_install_status.finished
-  retries: 60
-  delay: 5
-  become: true
-
-- name: Check if k3s token vault file already exists
-  ansible.builtin.stat:
-    path: "{{ playbook_dir }}/{{ k3s_server_token_vault_file }}"
-  register: k3s_vault_file_stat
-  delegate_to: localhost
-  run_once: true
-
-- name: Get K3s token from the first server
-  when:
-    - ansible_default_ipv4.address == k3s_primary_server_ip
-    - not k3s_vault_file_stat.stat.exists
-  ansible.builtin.slurp:
-    src: /var/lib/rancher/k3s/server/node-token
-  register: k3s_token
-  become: true
-
-- name: Set fact on k3s_primary_server_ip
-  ansible.builtin.set_fact:
-    k3s_token: "{{ k3s_token['content'] | b64decode | trim }}"
-  when:
-    - not k3s_vault_file_stat.stat.exists
-
-- name: Write K3s token to local file for encryption
-  ansible.builtin.copy:
-    content: |
-      k3s_token: "{{ k3s_token }}"
-    dest: "{{ playbook_dir }}/{{ k3s_server_token_vault_file }}"
-    mode: "0600"
-  delegate_to: localhost
-  run_once: true
-  when:
-    - not k3s_vault_file_stat.stat.exists
-
-- name: Encrypt k3s token
-  ansible.builtin.shell: cd ../; ansible-vault encrypt "{{ playbook_dir }}/{{k3s_server_token_vault_file}}"
-  delegate_to: localhost
-  when:
-    - not k3s_vault_file_stat.stat.exists
-
 - name: Install K3s on the secondary servers
-  when: (ansible_default_ipv4.address != k3s_primary_server_ip and (not k3s_status.stat.exists))
+  when: (ansible_default_ipv4.address != k3s_primary_server_ip)
   ansible.builtin.command: |
     /tmp/k3s_install.sh server \
     --node-taint CriticalAddonsOnly=true:NoExecute \