Update documentation regarding pg_hba (simplecluster example)

[Jorl17]

Hi! Thanks for your impressive work on stolon. We found it recently and have been trying to set it up and play with it a bit.

Unfortunately, I noticed while using your simple cluster example that it seems to be outdated because of commit eba0819 . Specifically, pg_hba.conf is no longer configured to accept local connections but this isn't clear from the simplecluster documentation (on the contrary).

Perhaps the documentation should be fixed with the appropriate information regarding usernames and passwords?

Once again, thanks for your work!

[sgotti]

@Jorl17 Thanks!

To be sure I tested it and local connection works (but they require a password and are not trusted anymore).

In the simple example the keeper command line:

./bin/stolon-keeper --cluster-name stolon-cluster --store-backend=etcd --uid postgres0 --data-dir data/postgres0 --pg-su-password=supassword --pg-repl-username=repluser --pg-repl-password=replpassword

means that a superuser with the same name of the local user running the keeper will be created with password supassword. The when using psql you should provide the password. It works both with local connection over network that over unix socket:

psql -h 127.0.0.1 -p 5432 postgres
psql -h /tmp/ -p 5432 postgres

[Jorl17]

Thanks :) I might create a PR with an update on the documentation to reflect these changes, so other new-users don't get initially confused too. Will report back soon!

[sgotti]

@Jorl17 a PR will be great! Thanks!

[viggy28]

Ran into this problem. If no one has started working on the PR, i can.