ansible: retire Minecraft Fossils

The Fabric server holds 8.8 GB of asxpio-services' 15 GB of RAM, more
than everything else on the host together, and the XMPP server moves
here next. Save the world, remove its containers and the daily restart
timer.

The world stays in /opt/minecraft-fossils/data, and in the restic
backups, until it is deleted by hand.

Assisted-by: Claude:opus-5-5

ansible/roles/minecraft_fossils/files/docker-compose.yml

@@ -1,87 +0,0 @@
-services:
-  minecraft-fossils:
-    image: itzg/minecraft-server:java21
-    container_name: minecraft-fossils
-    restart: unless-stopped
-    stop_grace_period: 2m
-    stdin_open: true
-    tty: true
-    ports:
-      - "25566:25565"
-    env_file:
-      - secrets.env
-    environment:
-      EULA: "TRUE"
-      TYPE: FABRIC
-      VERSION: "1.20.1"
-      FABRIC_LOADER_VERSION: "0.18.4"
-      MEMORY: "8G"
-      ONLINE_MODE: "FALSE"
-      ENFORCE_WHITELIST: "TRUE"
-      ENFORCE_SECURE_PROFILE: "FALSE"
-      WHITELIST_FILE: /data/whitelist.json
-      OPS_FILE: /data/ops.json
-      ENABLE_RCON: "TRUE"
-      MOTD: "[mc.czsk.dev] Fossils Archaeology Revival: Genesis"
-      USE_AIKAR_FLAGS: "TRUE"
-    volumes:
-      - /opt/minecraft-fossils/data:/data
-    networks:
-      - fossils
-
-  whitelist-sync:
-    image: alpine:3
-    container_name: minecraft-fossils-wlsync
-    restart: unless-stopped
-    depends_on:
-      - minecraft-fossils
-    volumes:
-      - /opt/minecraft:/src:ro
-      - /opt/minecraft-fossils/data:/dst
-    env_file:
-      - secrets.env
-    environment:
-      RCON_HOST: minecraft-fossils
-      INTERVAL: "15"
-    command:
-      - sh
-      - -c
-      - |
-        apk add --no-cache python3 >/dev/null
-        cat > /rcon.py <<'PY'
-        import socket, struct, sys, os
-        host, port, pw, cmd = os.environ["RCON_HOST"], 25575, os.environ["RCON_PASSWORD"], sys.argv[1]
-        def pkt(i, t, b): p = struct.pack("<ii", i, t) + b.encode() + b"\x00\x00"; return struct.pack("<i", len(p)) + p
-        def recv(s):
-            ln = struct.unpack("<i", s.recv(4))[0]; d = b""
-            while len(d) < ln: d += s.recv(ln - len(d))
-            return struct.unpack("<ii", d[:8])[0], d[8:-2].decode(errors="replace")
-        s = socket.create_connection((host, port), timeout=5)
-        s.send(pkt(1, 3, pw))
-        rid, _ = recv(s)
-        if rid == -1: print("auth failed"); sys.exit(1)
-        s.send(pkt(2, 2, cmd))
-        _, out = recv(s); print(out)
-        PY
-        echo "[wlsync] started, interval=$${INTERVAL}s"
-        while true; do
-          for f in whitelist.json ops.json banned-players.json banned-ips.json; do
-            if [ -f /src/$$f ] && ! cmp -s /src/$$f /dst/$$f 2>/dev/null; then
-              cp /src/$$f /dst/$$f
-              echo "[wlsync] copied $$f"
-              case $$f in
-                whitelist.json) CMD="whitelist reload" ;;
-                ops.json)       CMD="reload" ;;
-                banned-players.json|banned-ips.json) CMD="kick @a Ban list updated" ;;
-              esac
-              python3 /rcon.py "$$CMD" 2>&1 | sed 's/^/[wlsync] rcon: /' || echo "[wlsync] rcon failed"
-            fi
-          done
-          sleep $$INTERVAL
-        done
-    networks:
-      - fossils
-
-networks:
-  fossils:
-    driver: bridge

ansible/roles/minecraft_fossils/files/minecraft-fossils-restart.service

@@ -1,8 +0,0 @@
-[Unit]
-Description=Daily restart of minecraft-fossils container
-Requires=docker.service
-After=docker.service
-
-[Service]
-Type=oneshot
-ExecStart=/usr/bin/docker restart minecraft-fossils

ansible/roles/minecraft_fossils/files/minecraft-fossils-restart.timer

@@ -1,10 +0,0 @@
-[Unit]
-Description=Restart minecraft-fossils daily at 08:00 Europe/Tallinn
-
-[Timer]
-OnCalendar=*-*-* 08:00:00 Europe/Tallinn
-Persistent=true
-Unit=minecraft-fossils-restart.service
-
-[Install]
-WantedBy=timers.target

ansible/roles/minecraft_fossils/tasks/main.yaml

@@ -1,49 +1,39 @@
 ---
-# Fabric server plus a sidecar that mirrors the whitelist, ops and ban
-# lists from the Paper server. World data in /opt/minecraft-fossils/data
-# is not managed here. A compose change recreates the container, so it
-# is saved and stopped with time to finish first.
-- name: Deploy Minecraft Fossils
-  ansible.builtin.include_role:
-    name: docker_service
-  vars:
-    service_name: "minecraft-fossils"
-    service_base_path: "{{ services_base_path }}/minecraft-fossils"
-    service_templates:
-      - src: "secrets.env.j2"
-        dest: "secrets.env"
-        owner: "{{ minecraft_fossils_owner }}"
-        group: "{{ minecraft_fossils_owner }}"
-        mode: "0600"
-    service_files:
-      - src: "docker-compose.yml"
-        dest: "docker-compose.yml"
-        owner: "{{ minecraft_fossils_owner }}"
-        group: "{{ minecraft_fossils_owner }}"
-    # secrets.env only matters at container start; never restart the
-    # game server as a side effect of a deploy
-    service_restart_on_change: false
-    service_graceful_stop:
-      - container: minecraft-fossils
-        timeout: 120
-        pre_stop: docker exec minecraft-fossils rcon-cli save-all flush
-    health_check_enabled: false
+# Retired: the Fabric server is stopped for good to free its 8 GB of
+# RAM. The world stays in /opt/minecraft-fossils/data (and in the restic
+# backups) until it is deleted by hand.
+- name: Check for the old deployment
+  ansible.builtin.stat:
+    path: /opt/minecraft-fossils/docker-compose.yml
+  register: fossils_compose
 
-- name: Install the daily restart units
-  ansible.builtin.copy:
-    src: "{{ item }}"
-    dest: "/etc/systemd/system/{{ item }}"
-    mode: "0644"
+- name: Save the world
+  ansible.builtin.command: docker exec minecraft-fossils rcon-cli save-all flush
+  when: fossils_compose.stat.exists
+  register: fossils_save
+  changed_when: fossils_save.rc == 0
+  failed_when: false
+
+- name: Stop and remove the containers (data stays)
+  community.docker.docker_compose_v2:
+    project_src: /opt/minecraft-fossils
+    project_name: minecraft-fossils
+    state: absent
+    timeout: 120
+  when: fossils_compose.stat.exists
+
+- name: Disable the daily restart timer
+  ansible.builtin.systemd:
+    name: minecraft-fossils-restart.timer
+    enabled: false
+    state: stopped
+  failed_when: false
+
+- name: Remove the restart units
+  ansible.builtin.file:
+    path: "/etc/systemd/system/{{ item }}"
+    state: absent
   loop:
     - minecraft-fossils-restart.service
     - minecraft-fossils-restart.timer
   notify: Reload systemd
-
-- name: Flush handlers
-  ansible.builtin.meta: flush_handlers
-
-- name: Enable the daily restart timer
-  ansible.builtin.systemd:
-    name: minecraft-fossils-restart.timer
-    enabled: true
-    state: started

ansible/roles/minecraft_fossils/templates/secrets.env.j2

@@ -1,2 +0,0 @@
-RCON_PASSWORD={{ minecraft_fossils_rcon_password }}
-CF_API_KEY={{ minecraft_fossils_cf_api_key }}