refactor: yml -> yaml

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

roles/k3s_agent/tasks/installation.yaml

@@ -0,0 +1,29 @@
+---
+- name: Install dependencies for apt to use repositories over HTTPS
+  ansible.builtin.apt:
+    name: "{{ item }}"
+    state: present
+  loop:
+    - qemu-guest-agent
+  become: true
+
+- 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 on agent
+  when: not k3s_status.stat.exists
+  ansible.builtin.command: |
+    /tmp/k3s_install.sh
+  environment:
+    K3S_URL: "https://{{ hostvars['k3s-loadbalancer'].ansible_default_ipv4.address }}:{{ k3s.loadbalancer.default_port }}"
+    K3S_TOKEN: "{{ k3s_token }}"
+  become: true