Use PostgreSQL in Docker containers

[mcserep]

The libodb-pgsql-dev dependency is missing from the new Ubuntu 20.04 docker images.
PostgreSQL supersedes SQLite in performance, therefore we shall support it also in the docker images for production systems.

[whisperity]

The libodb-pgsql-dev dependency is missing from the new Ubuntu 20.04 docker images.

Ah, at first I thought you mean this in a way that they are gone from the upstream...

[whisperity]

Is installing libodb-pgsql-dev enough to have the ability to connect to a remote postgresql host? The changes in the patch don't bring in the ability to run PgSQL to the image.

[mcserep]

Is installing libodb-pgsql-dev enough to have the ability to connect to a remote postgresql host? The changes in the patch don't bring in the ability to run PgSQL to the image.

The web image contains postgresql-server-dev-12, but the dev image does not contain it, because it neither did before.
Would it be required, shall we add it? I would assume that libodb-pgsql-dev contains everything required to use ODB with PostgreSQL.

[whisperity]

libodb-pgsql-dev depends on libodb-pgsql-2.4 which in turn depends on libpq5, so we're good.

[bruntib]

Lacking PostgreSQL from the development image was half-intentional. For CodeCompass development SQLite could be enough. Anyway if we want to support our Docker image to work with PosgreSQL, then shouldn't it connect to a database running on the host machine or in a PostgreSQL Docker container? Maybe the extension of the documentation would also be useful on how to do it.

[mcserep]

Lacking PostgreSQL from the development image was half-intentional. For CodeCompass development SQLite could be enough. Anyway if we want to support our Docker image to work with PosgreSQL, then shouldn't it connect to a database running on the host machine or in a PostgreSQL Docker container? Maybe the extension of the documentation would also be useful on how to do it.

I agree and have very similar configuration myself in production: CodeCompass running in docker, PostgreSQL server running on the host machine.

But libodb-pgsql-2.4 is required to compile CodeCompass in the first place. The dev image is used to build CodeCompass for the web image. If the dev image does not contain libodb-pgsql-2.4, the web image will currently fail to build when CC_DATABASE is set to pgsql. That is a valid configuration currently and therefore this is a bug.