Docker-compose: Database is uninitialized

Question

I have a problem with docker-compose and mysql:

docker-compose.yml

version: \'2\' 
  services:
   db:
    image: mysql
    volumes:
      - \"./sito/db/:         


        

Answer 1

we can use

docker container run -d --name mysql -e MYSQL_RANDOM_ROOT_PASSWORD=password mysql

you can give any name and any password

Answer 2

According the documentation, instead of MYSQL_ROOT_PASSWORD: you have to use - and = and also you should use a 'password' The result it will be:

- MYSQL_ROOT_PASSWORD=some_password

In your example:

version: '2' 
  services:
   db:
    image: mysql
    volumes:
      - "./sito/db/:/var/lib/mysql"
    ports:
      - "3306:3306"
    restart: always
    environment:
      - MYSQL_ROOT_PASSWORD=some_password

Answer 3

It looks like you're setting the MYSQL_ROOT_PASSWORD to nothing. Per the documentation, it is required.

https://hub.docker.com/_/mysql/

MYSQL_ROOT_PASSWORD

This variable is mandatory and specifies the password that will be set for the MySQL root superuser account.

Answer 4

The problem will appear if you don't specify a value for MYSQL_ROOT_PASSWORD (other cases explained below).

You can use one of the following syntax below:

# syntax 1
environment:
  MYSQL_ROOT_PASSWORD: strongrootpassword

# syntax 2
environment:
 - MYSQL_ROOT_PASSWORD=strongrootpassword

If you wish to use blank/empty password then use the following:

MYSQL_ALLOW_EMPTY_PASSWORD=1

If you wish to set a random password then use the following:

MYSQL_RANDOM_ROOT_PASSWORD=1

Then you can get the generated password using

docker logs container_name_or_id 

In the end you need to specify ONE of MYSQL_ROOT_PASSWORD, MYSQL_ALLOW_EMPTY_PASSWORD and MYSQL_RANDOM_ROOT_PASSWORD according to the entrypoint of MySQL image:

• -z is to verify that the variable is not empty

if [ -z "$MYSQL_ROOT_PASSWORD" -a -z "$MYSQL_ALLOW_EMPTY_PASSWORD" -a -z "$MYSQL_RANDOM_ROOT_PASSWORD" ]; then
    echo >&2 'error: database is uninitialized and password option is not specified '
    echo >&2 '  You need to specify one of MYSQL_ROOT_PASSWORD, MYSQL_ALLOW_EMPTY_PASSWORD and MYSQL_RANDOM_ROOT_PASSWORD'
    exit 1
fi

Answer 5

I just wanted to point out something, if using docker run command in terminal and not docker-compose, this would be the command:

docker run -e MYSQL_ROOT_PASSWORD=password mysql_image

Just notice that it won't work if you put -e MYSQL_ROOT_PASSWORD=password after mysql_image