Add Minecraft server role

roles/minecraft/defaults/main.yaml

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+---
+minecraft_java_package_name: openjdk-8-jre-headless
+minecraft_java_package_state: present
+
+minecraft_service_name: minecraft.service
+minecraft_service_state: started
+minecraft_service_enabled: yes
+
+minecraft_user: minecraft
+minecraft_group: minecraft
+
+minecraft_jar_url: https://launcher.mojang.com/v1/objects/3dc3d84a581f14691199cf6831b71ed1296a9fdf/server.jar
+
+minecraft_opt_path: /opt/minecraft
+minecraft_var_path: "{{ minecraft_opt_path }}/var"

roles/minecraft/handlers/main.yaml

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+---
+- name: minecraft daemon-reload
+  systemd:
+    name: "{{ minecraft_service_name }}"
+    daemon_reload: yes
+    state: restarted
+
+- name: restart minecraft
+  service:
+    name: "{{ minecraft_service_name }}"
+    state: restarted

roles/minecraft/tasks/main.yaml

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+---
+- name: create minecraft group
+  group:
+    name: "{{ minecraft_group }}"
+    gid: "{{ minecraft_group_gid | default(omit) }}"
+    state: "{{ minecraft_group_state | default('present') }}"
+    system: yes
+
+- name: create minecraft user
+  user:
+    name: "{{ minecraft_user }}"
+    uid: "{{ minecraft_user_uid | default(omit) }}"
+    group: "{{ minecraft_group }}"
+    home: "{{ minecraft_var_path }}"
+    create_home: no
+    shell: "{{ minecraft_shell | default('/usr/sbin/nologin') }}"
+    state: "{{ minecraft_user_state | default('present') }}"
+    system: yes
+  
+- name: install java
+  package:
+    name: "{{ minecraft_java_package_name }}"
+    state: "{{ minecraft_java_package_state }}"
+
+- name: create minecraft installation directory
+  file:
+    path: "{{ item }}"
+    state: directory
+    owner: root
+    group: root
+    mode: "0755"
+  with_items:
+    - "{{ minecraft_opt_path }}"
+    - "{{ minecraft_opt_path }}/bin"
+    - "{{ minecraft_opt_path }}/etc"
+
+- name: create minecraft var directory
+  file:
+    path: "{{ item }}"
+    state: directory
+    owner: "{{ minecraft_user }}"
+    group: "{{ minecraft_group }}"
+    mode: "0755"
+  with_items:
+    - "{{ minecraft_var_path }}"
+
+- name: download minecraft server
+  get_url:
+    url: "{{ minecraft_jar_url }}"
+    dest: "{{ minecraft_opt_path }}/bin/server.jar"
+    owner: "{{ minecraft_user }}"
+    group: "{{ minecraft_group }}"
+    mode: "0644"
+
+- name: agree to the eula
+  copy:
+    content: "eula=true"
+    dest: "{{ minecraft_var_path }}/eula.txt"
+    owner: "{{ minecraft_user }}"
+    group: "{{ minecraft_group }}"
+    mode: "0644"
+
+- name: configure minecraft
+  template:
+    src: server.properties.j2
+    dest: "{{ minecraft_var_path }}/server.properties"
+    owner: root
+    group: root
+    mode: 0644
+  notify: restart minecraft
+
+- name: configure systemd unit
+  template:
+    src: minecraft.service.j2
+    dest: /etc/systemd/system/minecraft.service
+    owner: root
+    group: root
+    mode: 0644
+    #validate: systemd-analyze verify %s
+  notify: minecraft daemon-reload
+
+- name: manage minecraft service
+  service:
+    name: "{{ minecraft_service_name }}"
+    state: "{{ minecraft_service_state }}"
+    enabled: "{{ minecraft_service_enabled }}"
+
+- name: configure ops
+  copy:
+    content: "{{ (minecraft_ops | default([])) | to_nice_json }}"
+    dest: "{{ minecraft_var_path }}/ops.json"
+    owner: "{{ minecraft_user }}"
+    group: "{{ minecraft_group }}"
+    mode: "0644"
+  notify: restart minecraft
+
+- name: configure whitelist
+  copy:
+    content: "{{ (minecraft_whitelist | default([])) | to_nice_json }}"
+    dest: "{{ minecraft_var_path }}/whitelist.json"
+    owner: "{{ minecraft_user }}"
+    group: "{{ minecraft_group }}"
+    mode: "0644"
+  notify: restart minecraft

roles/minecraft/templates/minecraft.service.j2

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+# {{ ansible_managed }}
+
+[Unit]
+Description=Minecraft server
+After=network.target
+
+[Service]
+ExecStart=/usr/bin/java -Xmx{{ minecraft_java_xmx | default('1024M') }} -Xms{{ minecraft_java_xms | default('1024M') }} -jar {{ minecraft_opt_path }}/bin/server.jar --nogui
+Type=simple
+User={{ minecraft_user }}
+Group={{ minecraft_group }}
+WorkingDirectory={{ minecraft_var_path }}
+Restart=on-failure
+SyslogIdentifier=minecraft
+
+[Install]
+WantedBy=multi-user.target

roles/minecraft/templates/server.properties.j2

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+white-list: {{ (minecraft_config.whitelist | default(true)) | ternary('true', 'false') }}
+enforce-whitelist: {{ (minecaft_config.enfoce_whitelist | default(true)) | ternary('true', 'false') }}