Currently the command `docker-compose build` throws an error for building the database because it uses an old pip version.
This PR updates pip right before it is called. Anyways this should just be a temporary fix because the image uses Python 2.7 wich out of support since Jan 2020
I tried to use wal-e as mentioned on dockerhub (see https://hub.docker.com/r/mattermost/mattermost-prod-db). To do the base backup I had to do some additional steps (see https://github.com/mattermost/mattermost-docker/issues/346):
- mount a volume into the database docker container (path in the container is /etc/wal-e.d/env) and put all credentials and the s3 prefix to this folder
- exec into the container and create a superuser (Command: CREATE USER postgres SUPERUSER;)
Now it still fails with the message, that the package *pv* is missing
You may see this error if you use pgsql 9.5 with 9.4 data.
> FATAL: database files are incompatible with server
> DETAIL: The data directory was initialized by PostgreSQL version 9.4, which is not compatible with this version 9.5.0.
