Having issue while running docker-compose up -d

Question

version: '3.0'

services:

db:

image: mysql volumes: - db_data:/var/lib/mysql

restart: always

environment: MYSQL_ROOT_PASSWORD: 1234 MYSQL_USER: wordpress MYSQL_PASSWORD: 12345

wordpress1:

depends_on: -db

image: wordpress:latest

restart: always

ports: -"8080:80"

environment: WORDPRESS_DB_USER: wordpress WORDPRESS_DB_PASSWORD: wordpress WORDPRESS_DB_HOST: db:3306

volumes: db_data:

Error as below-

ERROR: yaml.scanner.ScannerError: while scanning a simple key in "./docker-compose.yml", line 21, column 3 could not find expected ':' in "./docker-compose.yml", line 23, column 3

Can anyone please help me to resolve this issue? I am trying to resolve since past 1 hour but getting into errors one by one

Please take Y minutes to learn Yaml. List elements start with a dash followed by a space followed by the element value. — Zeitounator
– Zeitounator, Commented Aug 25, 2020 at 20:05

Franz Diebold · Accepted Answer · 2020-08-25 20:30:34Z

1

The problem is probably in the definition of the wordpress1 service.

You need to add a space after the dash:

wordpress1:
  depends_on:
    - db

So instead of -db you need to have - db.

Edit:

The complete docker-compose.yml should probably look like this:

version: '3.0'

services:
  db:
    image: mysql
    volumes:
      - db_data:/var/lib/mysql
    restart: always
    environment:
      MYSQL_ROOT_PASSWORD: 1234
      MYSQL_USER: wordpress
      MYSQL_PASSWORD: 12345

  wordpress1:
    depends_on:
    - db
    image: wordpress:latest
    restart: always
    ports:
      - "8080:80"
    environment:
      WORDPRESS_DB_USER: wordpress
      WORDPRESS_DB_PASSWORD: wordpress
      WORDPRESS_DB_HOST: db:3306

volumes:
  db_data:

edited Aug 25, 2020 at 20:30

answered Aug 25, 2020 at 20:08

Franz Diebold

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4 Comments

Rishit Sheth Over a year ago

Thanks Franz, I did the same change and now it shows me ERROR: The Compose file './docker-compose.yml' is invalid because: services.wordpress1.volumes contains an invalid type, it should be an array

Rishit Sheth Over a year ago

I did it but shows ERROR: Named volume "db_data:/var/lib/mysql:rw" is used in service "db" but no declaration was found in the volumes section.

Franz Diebold Over a year ago

The last volumes should probably be on the "top level" of the yaml file. See my latest edit of my answer. @RishitSheth And don't forget to mark the answer as accepted and upvote it ;-)

Rishit Sheth Over a year ago

I tried that as well, but was getting the same error. I tried the code shown in docker documentation and it worked. both looks same but still getting error. I will try to write it again and see how it goes. Thanks much for the help, it was very helpful

Capucho · Accepted Answer · 2020-08-25 20:28:52Z

1

From docker documentation, the exact code you want to run: https://docs.docker.com/compose/wordpress/

answered Aug 25, 2020 at 20:28

Capucho

111 bronze badge

1 Comment

Rishit Sheth Over a year ago

that works for me, but I wonder what's the issue with the YML that I wrote. both looks like identical but still mine doesn't work

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