ansible/roles/minecraft/tasks/main.yml

#!/usr/bin/ansible-playbook
# vim:ft=ansible:
---
- name: Set up Minecraft user
  block:
    - name: Install required packages
      apt:
        name: "{{ packages }}"
      vars:
        packages:
          - openjdk-8-jre
          - screen
          - unzip
    - name: Assure minecraft admin group
      group:
        name: mc-admin
    - name: Assure server user
      user:
        name: minecraft
        group: mc-admin
        system: yes
        home: /var/minecraft
    - name: Assure var directory
      file:
        path: /var/minecraft
        state: directory
        owner: root
        group: mc-admin
        # Sticky, SetGID
        mode: "3770"
    - name: Assure systemd unit
      template:
        src: "minecraft@.service"
        dest: "/etc/systemd/system/minecraft@.service"
    - name: Reload available daemons
      systemd:
        daemon_reload: yes
  become: yes
- name: Set up Minecraft server
  block:
    - name: Create server directory
      file:
        path: "/var/minecraft/{{ mcname }}"
        state: directory
    - name: Download zip
      get_url:
        dest: "/var/minecraft/{{ mcname }}/modpack.zip"
        url: "{{ mczip }}"
      register: get_mcpack
    - name: Template out scripts
      template:
        src: "{{ item.src }}"
        dest: "/var/minecraft/{{ mcname }}/{{ item.dest }}"
        mode: "{{ item.mode }}"
      loop:
        - { src: "install.sh", dest: "install.sh", mode: "0755" }
        - { src: "recover.sh", dest: "recover.sh", mode: "0755" }
    - name: Install modpack
      block:
        - name: Disable service
          systemd:
            name: "minecraft@{{ mcname }}"
            state: stopped
          become: yes
          become_user: root
        - name: Remove remnants of old pack
          file:
            path: "{{ item }}"
            state: absent
          loop:
            - "/var/minecraft/{{ mcname }}/config"
            - "/var/minecraft/{{ mcname }}/coremods"
            - "/var/minecraft/{{ mcname }}/local"
            - "/var/minecraft/{{ mcname }}/mods"
            - "/var/minecraft/{{ mcname }}/scripts"
            - "/var/minecraft/{{ mcname }}/server.jar"
        - name: Unpack zip
          unarchive:
            src: "/var/minecraft/{{ mcname }}/modpack.zip"
            remote_src: yes
            dest: "/var/minecraft/{{ mcname }}"
          notify: "restart minecraft {{ mcname }}"
        - name: Run install script
          command:
            chdir: "/var/minecraft/{{ mcname }}"
            argv:
              - bash
              - "./install.sh"
          notify: "restart minecraft {{ mcname }}"
      when: get_mcpack is changed
    - name: Check for Forge
      stat:
        path: "/var/minecraft/{{ mcname }}/server.jar"
      register: stat_mcroot_forgejar
    - name: Install Forge
      block:
        - name: Download Forge
          get_url:
            dest: "/var/minecraft/{{ mcname }}/installer.jar"
            # Accurate as of 2020-02-23
            url: "https://files.minecraftforge.net/maven/net/minecraftforge/forge/{{ mcforge }}/forge-{{ mcforge }}-installer.jar"
          register: get_forge
        - name: Install Forge
          # Note: This also installs a Minecraft server, thankfully
          command:
            chdir: "/var/minecraft/{{ mcname }}"
            argv:
              - /usr/bin/java
              - "-jar"
              - "/var/minecraft/{{ mcname }}/installer.jar"
              - "--installServer"
          args:
            creates: "/var/minecraft/{{ mcname }}/forge-{{ mcforge }}-universal.jar"
        - name: Find classic jar name
          stat:
            path: "/var/minecraft/{{ mcname }}/forge-{{ mcforge }}-universal.jar"
          register: stat_mcroot_newjar
        - name: Link old-style server jar
          file:
            path: "/var/minecraft/{{ mcname }}/server.jar"
            src: "/var/minecraft/{{ mcname }}/forge-{{ mcforge }}-universal.jar"
            state: link
          when: stat_mcroot_newjar.stat.exists
        - name: Link new-style server jar
          file:
            path: "/var/minecraft/{{ mcname }}/server.jar"
            src: "/var/minecraft/{{ mcname }}/forge-{{ mcforge }}.jar"
            state: link
          when: not stat_mcroot_newjar.stat.exists
      when: not stat_mcroot_forgejar.stat.exists
    - name: Check for world
      stat:
        path: "/var/minecraft/{{ mcname }}/world"
      register: stat_mcroot_world
    - name: Recover world, if available
      block:
        - name: Stop server
          systemd:
            name: "minecraft@{{ mcname }}"
            state: stopped
        - name: Run recover script
          command:
            chdir: "/var/minecraft/{{ mcname }}"
            argv:
              - bash
              - "./recover.sh"
          notify: "restart minecraft {{ mcname }}"
          become: yes
          become_user: root
        - name: Change permissions of world
          file:
            path: "/var/minecraft/{{ mcname }}/world"
            state: directory
            owner: minecraft
            group: mc-admin
      when: not stat_mcroot_world.stat.exists
    - name: Configure server
      block:
        - name: Template out server.properties
          template:
            src: server.properties
            dest: "/var/minecraft/{{ mcname }}/server.properties"
        - name: Accept EULA
          copy:
            src: "eula.txt"
            dest: "/var/minecraft/{{ mcname }}/eula.txt"
  become: yes
  become_user: minecraft
- name: Set up system
  block:
    - name: Enable service
      systemd:
        name: "minecraft@{{ mcname }}"
        enabled: yes
        state: started
    - name: Template out backup module
      template:
        src: "backup.sh"
        dest: "/opt/backups/modules/minecraft-{{ mcname }}.sh"
        mode: "0600"
    - name: Assure CNAME record
      route53:
        state: present
        overwrite: yes
        zone: "{{ zone }}"
        type: CNAME
        record: "{{ mcname }}.mc.{{ zone }}."
        ttl: 300
        value:
          - "{{ inventory_hostname }}.{{ zone }}."
    - name: Assure SRV record
      route53:
        state: present
        overwrite: yes
        zone: "{{ zone }}"
        type: SRV
        record: "_minecraft._tcp.{{ mcname }}.mc.{{ zone }}."
        ttl: 300
        value:
          - "1 10 {{ mcport }} {{ inventory_hostname }}.{{ zone }}."
  become: yes