How to Install and Use Docker Compose for WordPress and Nginx with Persistent Storage

Installation of Docker Compose

If you have already successfully set up Harbor, you can skip this step.

Docker Compose File Format

Docker Compose uses YAML format, which relies on indentation to define hierarchy. Do not use Tab characters; YAML is case‑sensitive.

Example of a YAML file:

services:
  blog:
    image: wordpress
    links:
      - db:db
    ports:
      - "80:80"
    environment:
      - WORDPRESS_DB_HOST=db
      - WORDPRESS_DB_USER=root
      - WORDPRESS_DB_PASSWORD=123
      - WORDPRESS_DB_NAME=wordpress
  db:
    image: mysql
    environment:
      - MYSQL_ROOT_PASSWORD=123
      - MYSQL_DATABASE=wordpress

In the example, the ports value "80:80" is quoted because Docker expects a string; unquoted numbers cause errors. Some environment entries also need quotes when they contain numeric values.

Using Docker Compose

Save the above YAML as wordpress.yml. To start the containers:

# docker compose -f wordpress.yml up -d
[+] Running 3/3
✔ Network compose_default   Created   0.1s
✔ Container compose-db-1    Started   0.0s
✔ Container compose-blog-1  Started   0.0s

To stop and remove the containers, use the down command:

# docker compose -f wordpress.yml down
[+] Running 3/3
✔ Container compose-blog-1  Removed   1.2s
✔ Container compose-db-1    Removed   1.1s
✔ Network compose_default   Removed

Other useful commands include start, stop, and restart.

Docker Compose to Orchestrate Nginx with Persistent Storage

Example YAML for an Nginx service with a volume mapping:

services:
  web01:
    image: nginx
    ports:
      - "80:80"
    volumes:
      - "/html:/usr/share/nginx/html"

The volumes parameter mounts the host directory /html into the container.

# docker compose -f nginx.yml up -d
[+] Running 2/2
✔ Network compose_default    Created   0.1s
✔ Container compose-web01-1  Started
# curl localhost
hello

Link: https://www.cnblogs.com/fsdstudy/p/17949606