feat: Add Proxmox LXC container provisioning playbook, related secrets, and documentation.

playbooks/README.md

@@ -0,0 +1,57 @@
+# Ansible Playbooks
+
+This directory contains automation playbooks for managing the homelab infrastructure.
+
+## Provisioning & Setup
+
+### `create_lxc.yml`
+**Creates and bootstraps a new LXC container on Proxmox.**
+- **Input**: Prompts for Container Name and IP Address.
+- **Actions**:
+  1. Connects to Proxmox API to create a new unprivileged LXC container (Ubuntu 24.04).
+  2. Starts the container and waits for connectivity.
+  3. Temporarily adds the host to the inventory.
+  4. Automatically triggers `lxc_setup_ubuntu.yml` to secure the new container.
+
+### `lxc_setup_ubuntu.yml`
+**Secures a fresh Ubuntu installation.**
+- **Target**: Hosts in the `[new]` group (or fresh installs).
+- **Actions**:
+  1. Creates the administrative user (`mbuz`).
+  2. Sets up SSH public key authentication.
+  3. Disables root login and password authentication for SSH.
+  4. Configures passwordless `sudo` for the admin user.
+  5. **Inventory Update**: Moves the host from the `[new]` group to the `[lxc]` group in `hosts.ini`.
+
+### `lxc_setup_ubuntu_git.yml`
+**Provisions application dependencies on managed hosts.**
+- **Target**: Existing managed hosts (e.g., `[lxc]`).
+- **Actions**:
+  1. Installs `git` and core utilities.
+  2. Clones the central Docker configuration repository from the local Gitea server.
+  3. Prepares the `/opt/docker` directory structure.
+
+## Maintenance & Upgrades
+
+### `apt_upgrade.yml`
+**Performs system-wide updates.**
+- **Target**: All Ubuntu hosts.
+- **Actions**:
+  1. Updates `apt` cache.
+  2. Performs `dist-upgrade`.
+  3. Autoremoves unused packages.
+  4. Checks for and notifies if a reboot is required.
+
+### `zabbix_agent_upgrade.yml`
+**Updates Zabbix Agent.**
+- **Target**: `zagents` group.
+- **Actions**:
+  1. Ensures `zabbix-agent2` is installed and updated to the latest available version.
+
+### `zabbix_proxy_install.yml`
+**Installs Zabbix Proxy and Agent.**
+- **Target**: Specific Zabbix Proxy host.
+- **Actions**:
+  1. Downloads and installs the Zabbix release package.
+  2. Installs `zabbix-proxy-sqlite3` and `zabbix-agent2`.
+  3. Configures PSK encryption and connection settings using `secrets.yml`.

playbooks/create_lxc.yml

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+---
+- name: Create and Configure New LXC Container
+  hosts: localhost
+  gather_facts: no
+  vars_files:
+    - "../secrets.yml"
+  vars_prompt:
+    - name: container_name
+      prompt: "Enter the new container name (e.g., my-service)"
+      private: no
+    - name: container_ip
+      prompt: "Enter the IP address (CIDR format preferred, or I will append /24) e.g., 10.0.0.123"
+      private: no
+
+  tasks:
+    - name: Normalize IP address (append /24 if missing)
+      set_fact:
+        container_ip_cidr: "{{ container_ip if '/' in container_ip else container_ip + '/24' }}"
+      
+    - name: Create LXC container on Proxmox
+      community.general.proxmox:
+        api_host: "{{ proxmox_host | default('10.0.0.1') }}"
+        api_user: "{{ proxmox_api_user }}"
+        api_token_id: "{{ proxmox_api_token_id }}"
+        api_token_secret: "{{ proxmox_api_token_secret }}"
+        node: "{{ proxmox_node }}"
+        storage: "{{ proxmox_storage }}"
+        ostemplate: '{{ proxmox_storage }}:vztmpl/ubuntu-24.04-standard_24.04-2_amd64.tar.zst'
+        hostname: "{{ container_name }}"
+        password: "TempPassword123!" # Temporary password, will be disabled by lxc_setup
+        netif:
+          net0: "name=eth0,gw=10.0.0.1,ip={{ container_ip_cidr }},bridge=vmbr0"
+        cores: 2
+        memory: 1024
+        swap: 512
+        state: started
+        unprivileged: yes
+        features:
+          - nesting=1
+      register: proxmox_creation
+
+    - name: Wait for container to be reachable
+      wait_for:
+        host: "{{ container_ip_cidr | split('/') | first }}"
+        port: 22
+        search_regex: OpenSSH
+        delay: 10
+        timeout: 300
+
+    - name: Add new host to in-memory inventory (group 'new')
+      add_host:
+        name: "{{ container_name }}"
+        groups: new
+        ansible_host: "{{ container_ip_cidr | split('/') | first }}"
+        ansible_user: root
+        ansible_ssh_pass: "TempPassword123!"
+        # We need to ignore host key checking for the fresh container to avoid interactive prompt
+        ansible_ssh_common_args: '-o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null'
+
+    - name: Add new host to local hosts.ini file (persistency)
+      ansible.builtin.blockinfile:
+        path: "{{ inventory_dir }}/hosts.ini"
+        block: |
+          {{ container_name }} ansible_host={{ container_ip_cidr | split('/') | first }} ansible_user=root
+        insertafter: "^\\[new\\]"
+        marker: "# {mark} ANSIBLE MANAGED BLOCK FOR NEW HOST {{ container_name }}"
+
+- name: Run Standard Setup on New Host
+  import_playbook: lxc_setup_ubuntu.yml

playbooks/lxc_setup_ubuntu.yml

@@ -66,7 +66,7 @@
   tasks:
     - name: Remove host from the [new] group
       ansible.builtin.lineinfile:
-        path: /opt/ansible/inventory/hosts.ini
+        path: "{{ inventory_dir }}/hosts.ini"
         regexp: "^{{ item }}\\s" # Match the start of the line with the hostname
         state: absent
       loop: "{{ groups['new'] }}" # Loop over all hosts in the 'new' group