Add default root password to postgres service definition

[skrajewski]

Thanks for preparing the whole stack on docker-compose. It's really easy to use.

After docker-compose up -d, the postgres service is down and docker logs prints information about missing root password.

postgresql_1 | Error: Database is uninitialized and superuser password is not specified.
postgresql_1 | You must specify POSTGRES_PASSWORD to a non-empty value for the
postgresql_1 | superuser. For example, "-e POSTGRES_PASSWORD=password" on "docker run".
postgresql_1 |
postgresql_1 | You may also use "POSTGRES_HOST_AUTH_METHOD=trust" to allow all
postgresql_1 | connections without a password. This is *not* recommended.
postgresql_1 |
postgresql_1 | See PostgreSQL documentation about "trust":
postgresql_1 | https://www.postgresql.org/docs/current/auth-trust.html

Since these docker-compose files are for testing purposes, I think it's OK to use some default root password. It'll make the up process seamlessly.

Kind Regards.

[bconway]

I'm seeing this behavior as well with a fresh clone of the repo, but definitely have not previously. Perhaps this is new(ish) default behavior for the PostgreSQL image tag, I vaguely recall the docs previously saying POSTGRES_PASSWORD defaulted to the same as POSTGRES_USER.

[sophiekovalevsky]

I think this is related with the newer postgres docker image version. As far as I know, this is to improve security.

As far as I know, to solve the issue there are two approaches:

• Set POSTGRESS_PASSWORD as @skrajewski suggested on his commit.
• Explicitily tell postgres that no password is required for connection setting up POSTGRES_HOST_AUTH_METHOD=trust

The pull request associated with can be found at docker-library/postgres#658

I think that between those I would rather choose first one.

[brocaar]

Thanks @skrajewski, I can also reproduce the issue by pulling in the latest postgresql Docker image. With your changes this issue is fixed 👍