Wordpress on docker-compose no run

13,999

Solution 1

Solution:

Remember to link the mysql container to the wordpress container:

links:
   - db:mysql

Like this:

version: '2'
services:
  wordpress:
    image: wordpress
    ports:
      - "8080:80"
    links:
      - db:mysql
    environment:
      WORDPRESS_DB_PASSWORD: example
  db:
    image: mysql:5.7
    environment:
      MYSQL_ROOT_PASSWORD: example

This important detail is not mentioned on the WordPress image official Dockerhub page

Solution 2

This anwser works for me, cause I didn't have enough reputation to vote that anwser, I copy it here:

depends_on:
  - db

That just makes sure the database container is fully loaded before the wordpress container. You need to tell docker to link the db container from the wordpress container to reference it by name.

What docker-compose does under the hood is take the ip docker gives the dbcontainer and add a /etc/hosts entry to the wordpress container so you can reference it by name.

So try adding this to the wordpress section

links:
  - db

Solution 3

Are you setting the DB host (and other needed MySql attributes), in your Compose file wordpress service (other than password, shown in your post)? e.g.:

environment:
  WORDPRESS_DB_PASSWORD: example
  WORDPRESS_DB_HOST: db
  WORDPRESS_DB_USER: {xxx}
  WORDPRESS_DB_NAME: {xxx}
  WORDPRESS_TABLE_PREFIX: {xxx}

In particular the "host" value, which in your setup should be db. You should not have to do any linking, although it would be a good idea to add

depends_on:
  - db

to your wordpress service block which will set the dependency order to start the db container before your wordpress container. (A links attribute would do the same, but trying to keep things simple.)

Note:

By default Compose sets up a single network for your app. Each container for a service joins the default network and is both reachable by other containers on that network, and discoverable by them at a hostname identical to the container name.

Links allow you to define extra aliases by which a service is reachable from another service. They are not required to enable services to communicate - by default, any service can reach any other service at that service’s name.

https://docs.docker.com/compose/networking/#/links

I would not mess around with networks unless you really understand what you are doing, as in most cases the defaults will work fine. If you have some special case, you can always optimize that later.

Solution 4

Adding these under 'db:' solved it for me.

    command: --default-authentication-plugin=mysql_native_password
    restart: always
Share:
13,999
alvarezsh
Author by

alvarezsh

Updated on June 05, 2022

Comments

  • alvarezsh
    alvarezsh about 2 years

    This is my docker-compose.yml

    version: '2'
    services:
      wordpress:
        image: wordpress
        ports:
          - "8080:80"
        environment:
          WORDPRESS_DB_PASSWORD: example
      db:
        image: mysql:5.7
        environment:
          MYSQL_ROOT_PASSWORD: example
    

    the services run normally, but, a few seconds later, the wordpress container stop.

    This is my docker logs wordpress container:

    WordPress not found in /var/www/html - copying now...
    Complete! WordPress has been successfully copied to /var/www/html
    
    MySQL Connection Error: (2002) php_network_getaddresses: getaddrinfo failed: Name or service not known
    
    Warning: mysqli::mysqli(): php_network_getaddresses: getaddrinfo failed: Name or service not known in - on line 10
    
    Warning: mysqli::mysqli(): (HY000/2002): php_network_getaddresses: getaddrinfo failed: Name or service not known in - on line 10
    
    MySQL Connection Error: (2002) php_network_getaddresses: getaddrinfo failed: Name or service not known
    
    Warning: mysqli::mysqli(): php_network_getaddresses: getaddrinfo failed: Name or service not known in - on line 10
    
    Warning: mysqli::mysqli(): (HY000/2002): php_network_getaddresses: getaddrinfo failed: Name or service not known in - on line 10
    
    
    MySQL Connection Error: (2002) php_network_getaddresses: getaddrinfo failed: Name or service not known
    Warning: mysqli::mysqli(): php_network_getaddresses: getaddrinfo failed: Name or service not known in - on line 10
    
    Warning: mysqli::mysqli(): (HY000/2002): php_network_getaddresses: getaddrinfo failed: Name or service not known in - on line 10
    
    Warning: mysqli::mysqli(): php_network_getaddresses: getaddrinfo failed: Name or service not known in - on line 10
    
    MySQL Connection Error: (2002) php_network_getaddresses: getaddrinfo failed: Name or service not known
    
    Warning: mysqli::mysqli(): (HY000/2002): php_network_getaddresses: getaddrinfo failed: Name or service not known in - on line 10
    

    Why does this happen?

  • bbeecher
    bbeecher over 6 years
    The mysql host alias in the link is important here :(