- name: Set up runner host via jumphost.
  gather_facts: false
  hosts: localhost
  vars_files:
    - ../vault.yml
    - ../dist/terraform_outputs.yml
  tasks:
    - name: Add gitea server as jumphost.
      ansible.builtin.add_host:
        name: server
        ansible_ssh_host: "{{ server_ip.value }}"
        ansible_user: root
        ansible_port: 2222
        ansible_private_key_file: "{{ secret.private_ssh_key_path }}"

    - name: Add runner host (via jumphost).
      ansible.builtin.add_host:
        name: runner
        ansible_ssh_host: "{{ runner_ip.value }}"
        ansible_user: root
        ansible_private_key_file: "{{ secret.private_ssh_key_path }}"
        ansible_ssh_common_args: >-
          -o ProxyCommand="ssh -i {{ secret.private_ssh_key_path }} -p 2222 -W %h:%p root@{{ server_ip.value }}"

- name: Install Docker on runner.
  gather_facts: true
  hosts: runner
  vars_files:
    - ../vault.yml
    - ../dist/terraform_outputs.yml
  tasks:
    - name: Set DNS resolver.
      ansible.builtin.copy:
        content: "nameserver 185.12.64.2\n"
        dest: /etc/resolv.conf
        mode: "0644"

    - name: Install PIP.
      ansible.builtin.apt:
        state: present
        update_cache: true
        name:
          - python3-pip

    - name: Install needed packages.
      ansible.builtin.pip:
        name:
          - packaging
        state: present
        break_system_packages: true

    - name: Download Docker repository key.
      ansible.builtin.apt_key:
        url: https://download.docker.com/linux/debian/gpg
        state: present

    - name: Download Docker repository.
      ansible.builtin.apt_repository:
        repo: "deb https://download.docker.com/linux/debian {{ ansible_distribution_release }} stable"
        state: present

    - name: Remove bad packages.
      ansible.builtin.apt:
        state: absent
        package:
          - docker.io
          - docker-doc
          - docker-compose
          - podman-docker
          - containerd
          - runc

    - name: Download Docker dependencies.
      ansible.builtin.apt:
        state: present
        package:
          - ca-certificates
          - curl
          - jq

    - name: Download Docker packages.
      ansible.builtin.apt:
        state: present
        update_cache: true
        package:
          - docker-ce
          - docker-ce-cli
          - containerd.io
          - docker-buildx-plugin
          - docker-compose-plugin

- name: Configure swap on runner.
  hosts: runner
  gather_facts: false
  tasks:
    - name: Create swapfile.
      ansible.builtin.command:
        cmd: fallocate -l 2G /swapfile
        creates: /swapfile

    - name: Set swapfile permissions.
      ansible.builtin.file:
        path: /swapfile
        mode: "0600"

    - name: Check if swap is active.
      ansible.builtin.command:
        cmd: swapon --show=NAME --noheadings
      register: swap_status
      changed_when: false

    - name: Format swapfile.
      ansible.builtin.command:
        cmd: mkswap /swapfile
      when: "'/swapfile' not in swap_status.stdout"
      changed_when: true

    - name: Enable swapfile.
      ansible.builtin.command:
        cmd: swapon /swapfile
      when: "'/swapfile' not in swap_status.stdout"
      changed_when: true

    - name: Add swapfile to fstab.
      ansible.posix.mount:
        path: none
        src: /swapfile
        fstype: swap
        opts: sw
        state: present

- name: Register and start Gitea runner.
  hosts: runner
  gather_facts: false
  vars_files:
    - ../vault.yml
    - ../dist/terraform_outputs.yml
  vars:
    gitea_hostname: "{{ server_fqdn.value }}"
    gitea_internal_url: "https://{{ gitea_hostname }}"
  tasks:
    - name: Create runner data volume.
      community.docker.docker_volume:
        name: runner-data
        state: present

    - name: Generate runner config.
      ansible.builtin.copy:
        dest: /root/runner-config.yaml
        mode: "0644"
        content: |
          runner:
            insecure: true
            capacity: 1
          cache:
            enabled: false
          container:
            options: "--add-host {{ gitea_hostname }}:10.0.1.2 --memory=1536m"
            valid_volumes:
              - /var/run/docker.sock

    - name: Start Gitea runner container.
      community.docker.docker_container:
        name: gitea-runner
        image: gitea/act_runner:latest
        state: started
        recreate: true
        restart_policy: unless-stopped
        etc_hosts: "{{ {gitea_hostname: '10.0.1.2'} }}"
        volumes:
          - runner-data:/data
          - /var/run/docker.sock:/var/run/docker.sock
          - /root/runner-config.yaml:/config.yaml:ro
        env:
          GITEA_INSTANCE_URL: "{{ gitea_internal_url }}"
          GITEA_RUNNER_REGISTRATION_TOKEN: "{{ secret.runner_registration_token }}"
          GITEA_RUNNER_NAME: "runner-01"
          CONFIG_FILE: "/config.yaml"