Add HA option, change to yaml inventory, cleanup

- HA option for multiple server nodes using embedded etcd
- Switch to yaml inventory file for easier editing and combining vars
- Update to full ansible module names
- Change master/node names to server/agent
- Cleanup small linting errors
- Add reboot playbook which staggers reboot to keep HA cluster up
- Move playbooks to playbook directory

Signed-off-by: Derek Nola <derek.nola@suse.com>

roles/k3s/server/tasks/main.yml

@@ -0,0 +1,100 @@
+---
+- name: Init cluster using temporary service
+  ansible.builtin.command:
+    cmd: "systemd-run -p RestartSec=2 -p Restart=on-failure --unit=k3s-init k3s server {{ server_init_args }}"
+    creates: "{{ systemd_dir }}/k3s.service"
+
+- name: Verification
+  block:
+    - name: Verify that all nodes joined
+      ansible.builtin.command:
+        cmd: k3s kubectl get nodes -l "node-role.kubernetes.io/control-plane=true" -o=jsonpath="{.items[*].metadata.name}"
+      register: nodes
+      until: nodes.rc == 0 and (nodes.stdout.split() | length) == (groups['server'] | length)
+      retries: 20
+      delay: 10
+      changed_when: false
+  always:
+    - name: Kill the temporary init service
+      ansible.builtin.systemd:
+        name: k3s-init
+        state: stopped
+      failed_when: false
+
+- name: Copy K3s service file
+  register: k3s_service
+  ansible.builtin.template:
+    src: "k3s.service.j2"
+    dest: "{{ systemd_dir }}/k3s.service"
+    owner: root
+    group: root
+    mode: 0644
+
+- name: Enable and check K3s service
+  ansible.builtin.systemd:
+    name: k3s
+    daemon_reload: yes
+    state: restarted
+    enabled: yes
+
+- name: Wait for node-token
+  ansible.builtin.wait_for:
+    path: "{{ k3s_server_location }}/server/node-token"
+
+- name: Register node-token file access mode
+  ansible.builtin.stat:
+    path: "{{ k3s_server_location }}/server/node-token"
+  register: p
+
+- name: Change file access node-token
+  ansible.builtin.file:
+    path: "{{ k3s_server_location }}/server/node-token"
+    mode: "g+rx,o+rx"
+
+- name: Read node-token from server
+  ansible.builtin.slurp:
+    path: "{{ k3s_server_location }}/server/node-token"
+  register: node_token
+
+- name: Store server node-token
+  ansible.builtin.set_fact:
+    token: "{{ node_token.content | b64decode | regex_replace('\n', '') }}"
+
+- name: Restore node-token file access
+  ansible.builtin.file:
+    path: "{{ k3s_server_location }}/server/node-token"
+    mode: "{{ p.stat.mode }}"
+
+- name: Create directory .kube
+  ansible.builtin.file:
+    path: ~{{ ansible_user }}/.kube
+    state: directory
+    owner: "{{ ansible_user }}"
+    mode: "u=rwx,g=rx,o="
+
+- name: Copy config file to user home directory
+  ansible.builtin.copy:
+    src: /etc/rancher/k3s/k3s.yaml
+    dest: ~{{ ansible_user }}/.kube/config
+    remote_src: yes
+    owner: "{{ ansible_user }}"
+    mode: "u=rw,g=,o="
+
+- name: Change server to API endpoint instead of localhost
+  ansible.builtin.command: >-
+    /usr/local/bin/k3s kubectl config set-cluster default
+      --server=https://{{ api_endpoint }}:{{ api_port }}
+      --kubeconfig ~{{ ansible_user }}/.kube/config
+  changed_when: true
+
+- name: Create kubectl symlink
+  ansible.builtin.file:
+    src: /usr/local/bin/k3s
+    dest: /usr/local/bin/kubectl
+    state: link
+
+- name: Create crictl symlink
+  ansible.builtin.file:
+    src: /usr/local/bin/k3s
+    dest: /usr/local/bin/crictl
+    state: link