Creating compose.yaml

This Docker Compose file defines a multi-service application stack, including:

Caddy: A web server and reverse proxy
Ghost: A blogging platform
Gitea: A self-hosted Git service
MySQL: A database for Ghost
Varnish: A caching HTTP reverse proxy

Key features:

Uses YAML anchors for reusable logging and healthcheck configurations
Defines two networks: "web" (external) and "internal" (bridge)
Specifies volume mounts for persistent data storage
Implements healthchecks for all services
Uses secrets for sensitive information (MySQL password)
Sets up dependencies between services

Services overview:

Caddy: Handles incoming HTTP/HTTPS traffic
Ghost: Main blogging application, configured to use MySQL
Gitea: Git repository hosting service
MySQL: Database backend for Ghost
Varnish: Caching layer, likely sitting in front of Ghost

The configuration also defines volumes for MySQL, Ghost, and Gitea data, and uses a secret for the Ghost MySQL password.

compose.yaml

@@ -0,0 +1,122 @@
+x-logging: &default-logging
+  options:
+    max-size: "10m"
+    max-file: "3"
+
+x-healthcheck: &default-healthcheck
+  interval: 30s
+  timeout: 10s
+  retries: 3
+  start_period: 5s
+
+networks:
+  web:
+    external: true
+  internal:
+    external: false
+    driver: bridge
+
+services:
+  caddy:
+    image: caddy:2-alpine
+    restart: unless-stopped
+    ports:
+      - "80:80"
+      - "443:443"
+    volumes:
+      - ./caddy/Caddyfile:/etc/caddy/Caddyfile
+      - ./caddy/data:/data
+      - ./caddy/config:/config
+    networks:
+      - web
+      - internal
+    logging: *default-logging
+    healthcheck:
+      <<: *default-healthcheck
+      test: ["CMD", "nc", "-z", "localhost", "80"]
+
+  ghost:
+    image: ghost:5.89-alpine
+    restart: unless-stopped
+    environment:
+      - url=https://speedyweedyops.org
+      - database__client=mysql
+      - database__connection__host=mysql
+      - database__connection__user=ghostmysqluser
+      - database__connection__password=/run/secrets/ghost_mysql_password
+      - database__connection__database=dbghost
+    secrets:
+      - ghost_mysql_password
+    volumes:
+      - myghostapp:/var/lib/ghost/content
+    networks:
+      - internal
+    depends_on:
+      - mysql
+      - caddy
+    logging: *default-logging
+    healthcheck:
+      <<: *default-healthcheck
+      test: ["CMD", "nc", "-z", "localhost", "2368"]
+
+  gitea:
+    image: gitea/gitea:1.22
+    restart: unless-stopped
+    volumes:
+      - giteadata:/data
+    networks:
+      - internal
+    depends_on:
+      - caddy
+    logging: *default-logging
+    healthcheck:
+      <<: *default-healthcheck
+      test: ["CMD", "nc", "-z", "localhost", "3000"]
+
+  mysql:
+    image: mysql:8.4.2
+    restart: always
+    environment:
+      - MYSQL_RANDOM_ROOT_PASSWORD=true
+      - MYSQL_DATABASE=dbghost
+      - MYSQL_PASSWORD=/run/secrets/ghost_mysql_password
+      - MYSQL_USER=ghostmysqluser
+    secrets:
+      - ghost_mysql_password
+    volumes:
+      - ./mysql/my.cnf:/etc/mysql/my.cnf
+      - mysqldb:/var/lib/mysql
+    networks:
+      - internal
+    logging: *default-logging
+    healthcheck:
+      <<: *default-healthcheck
+      test: ["CMD", "bash", "-c", "cat < /dev/null > /dev/tcp/localhost/3306"]
+      interval: 10s
+      start_period: 30s
+
+  varnish:
+    image: varnish:7.3
+    restart: unless-stopped
+    volumes:
+      - ./varnish/default.vcl:/etc/varnish/default.vcl:ro
+    environment:
+      - VARNISH_SIZE=512M
+    networks:
+      - internal
+    depends_on:
+      - ghost
+    logging: *default-logging
+    healthcheck:
+      <<: *default-healthcheck
+      test: ["CMD", "varnishadm", "ping"]
+      interval: 10s
+
+volumes:
+  mysqldb:
+  myghostapp:
+  giteadata:
+
+secrets:
+  ghost_mysql_password:
+    file: ./ghost_mysql_password