- hosts: supernode
  vars:
    docker_ipv6_net: fcff:ffff:ffff:ffff::/64
  become: yes
  collections:
    - ansible.posix
  handlers:
    - name: Reload kernel modules
      service:
        name: systemd-modules-load
        state: restarted
      listen: reload modules
    - name: Reload docker daemon
      service:
        name: docker
        state: restarted
      listen: reload docker
  tasks:
    - name: install programs
      package:
        name:
          - docker.io
          - docker-compose
          - wireguard-dkms

    - name: ensure kernel modules are loaded
      blockinfile:
        path: /etc/modules
        block:
          wireguard
          tap
        marker: "# {mark} ANSIBLE MANAGED BLOCK"
      notify: reload modules

    - name: Configure docker
      copy:
        content: | 
          {
            "log-driver": "json-file",
            "log-opts": {
              "max-size": "1m",
              "max-file": "3"
            },
            "ipv6": true,
            "fixed-cidr-v6": "{{ docker_ipv6_net }}"
          }
        dest: /etc/docker/daemon.json
        mode: u=rw,g=r,o=r
        owner: root
        group: root
      notify: reload docker

    - name: Start docker daemon
      service:
        name: docker
        state: started

- hosts: supernode
  vars:
    env_file: /home/vagrant/supernode.env
    supernode_v4_ip: 172.29.0.1/24
    supernode_v4_range_start: 172.29.0.16
    supernode_v4_range_end: 172.29.0.31
    supernode_v6_ip: fc00:1234:5678::1/64
    supernode_v6_range_start: fc00:1234:5678::1000
    supernode_v6_range_end: fc00:1234:5678::1fff
    fastd_secret_key: 90f0637239cdf4c27dc80ee8a755ae4922769d045c86cc2086a96a3a281ed04a
    fastd_port: 10000
    wireguard_key: tbd
  collections:
    - community.docker
  tasks:
    - name: Create vpn frontend network
      community.docker.docker_network:
        name: vpn_frontend
        enable_ipv6: yes
        ipam_config:
          - subnet: "{{ supernode_v4_ip |ipaddr('network/prefix') }}"
          - subnet: "{{ supernode_v6_ip |ipaddr('network/prefix') }}"

    - name: Build docker images
      docker_image:
        build:
          path: "/vagrant_data/{{ item }}"
        name: "{{ item }}"
        source: build
      with_items:
        - batman
        - dhcpd
        - fastd
        - wireguard

    - name: place env config
      copy:
        content: |
          # ansible managed
          BATMAN_BRIDGE=br-batman0
          BATMAN_BRIDGE_IPV4={{ supernode_v4_ip }}
          BATMAN_BRIDGE_IPV6={{ supernode_v6_ip }}
          BATMAN_FORWARD_GATEWAY=172.28.0.2
          BATMAN_LIMIT_DOWNLOAD=1000
          BATMAN_LIMIT_UPLOAD=1000

          FASTD_BATMAN_INTERFACE=bat0
          FASTD_DONT_VERIFY_PEERS=1
          FASTD_LOG_LEVEL=debug
          FASTD_PEER_LIMIT=10
          FASTD_SECRET_KEY={{ fastd_secret_key }}

          DHCPD_INTERFACE=br-batman0
          DHCPD_V4_NET={{ supernode_v4_ip |ipaddr('network') }}
          DHCPD_V4_SUBNET={{ supernode_v4_ip |ipaddr('netmask') }}
          DHCPD_V4_RANGE={{ supernode_v4_range_start }} {{ supernode_v4_range_end }}
          DHCPD_V6_NET={{ supernode_v6_ip |ipaddr('network/prefix') }}
          DHCPD_V6_RANGE={{ supernode_v6_range_start }} {{ supernode_v6_range_end }}
          DHCPD_V6_TEMPORARY_NET={{ supernode_v6_ip |ipaddr('network/prefix') }}
        dest: "{{ env_file }}"
        mode: u=rw,g=,o=
      register: __env_file

    - name: Remove old containers
      docker_container:
        name: "{{ item }}"
        state: absent
        stop_timeout: 0
      with_items:
        - batman_network
        - fastd_server
        - dhcp_v4
        - dhcp_v6
      when: __env_file.changed

    - name: Start batman network
      docker_container:
        name: batman_network
        image: batman
        env_file: "{{ env_file }}"
        capabilities:
          - NET_ADMIN
        published_ports:
          - "{{ fastd_port }}:10000/udp"
          - "{{ fastd_port }}:10000/tcp"
        networks:
          - name: vpn_frontend
        sysctls:
          net.ipv6.conf.all.disable_ipv6: 0

    - name: Start fastd
      docker_container:
        name: fastd_server
        image: fastd
        env_file: "{{ env_file }}"
        capabilities:
          - NET_ADMIN
        devices:
          - /dev/net/tun:/dev/net/tun
        network_mode: container:batman_network

    - name: Start dhcp server for ipv4
      docker_container:
        name: dhcp_v4
        image: dhcpd
        env_file: "{{ env_file }}"
        env:
          DHCPD_MODE: "4"
        capabilities:
          - NET_ADMIN
        network_mode: container:batman_network

    - name: Start dhcp server for ipv6
      docker_container:
        name: dhcp_v6
        image: dhcpd
        env_file: "{{ env_file }}"
        env:
          DHCPD_MODE: "6"
        capabilities:
          - NET_ADMIN
        network_mode: container:batman_network