break: migrate back to bare-metal (and ansible)

- remove docker-compose.yml
- add ansible playbook for k3s and argocd deployment
- update renovate custom manager for k3s version
- update README.md with new instructions

🤖

playbook.yml

@@ -0,0 +1,61 @@
+# vim: set ft=yaml.ansible:
+---
+- name: Install k3s server
+  hosts: all
+  gather_facts: false
+  tags: k3s-server
+
+  vars:
+    k3s_version: v1.30.4+k3s1
+
+  tasks:
+    - name: Get k3s installed version
+      ansible.builtin.command: k3s --version
+      register: k3s_version_output
+      check_mode: false
+      changed_when: false
+      ignore_errors: true
+
+    - name: Set k3s installed version
+      when: k3s_version_output.rc == 0
+      ansible.builtin.set_fact:
+        installed_k3s_version: "{{ k3s_version_output.stdout_lines[0].split(' ')[2] }}"
+
+    - name: Download and install/update k3s
+      when: (k3s_version_output.rc != 0) or (installed_k3s_version != k3s_version)
+      block:
+        - name: Download K3s install script
+          ansible.builtin.get_url:
+            url: https://get.k3s.io
+            dest: /usr/local/bin/k3s_install.sh
+            mode: "755"
+        - name: Install k3s server
+          ansible.builtin.command: "k3s_install.sh"
+          environment:
+            K3S_NODE_NAME: "{{ inventory_hostname }}"
+            INSTALL_K3S_CHANNEL: "{{ k3s_version }}"
+            INSTALL_K3S_EXEC: "--disable=traefik --tls-san {{ inventory_hostname }}"
+          changed_when: false
+
+    - name: Start and enable k3s server
+      ansible.builtin.service:
+        name: k3s.service
+        state: started
+        enabled: true
+
+    - name: Add restart cronjob
+      ansible.builtin.cron:
+        name: "restart k3s (and regenerate certs if necessary)"
+        special_time: monthly
+        job: "systemctl restart k3s"
+
+- name: Deploy ArgoCD
+  hosts: all
+  gather_facts: false
+  tags: baseline
+  tasks:
+    - name: Copy manifest
+      ansible.builtin.copy:
+        src: argocd-bootstrap/
+        dest: /var/lib/rancher/k3s/server/manifests/argocd-bootstrap/
+        mode: "0755"