Good afternoon! Newbie here, I’ve tried to install Lemmy using Ansible (Debian stable) and I ended up having an issue with the Postgresql connectivity (localhost via socket).
The error message I have is:
thread 'main' panicked at 'Error connecting to postgresql:///lemmy?user=lemmy&host=/var/run/postgresql: connection to server on socket "/var/run/postgresql/.s.PGSQL.5432" failed: No such file or directory
I have updated my /etc/postgresql/15/main/pg_hba.conf from peer to trust to md5 with no success (rebooting Postresql each time).
My config.hjson is:
database: {
uri: "postgresql:///lemmy?user=lemmy&host=/var/run/postgresql"
password: "{{ postgres\_password }}"
}
Any idea / suggestion? Thanks!
PS: cross-posted on the Matrix.org install support chat
My investigations so far have led me to the conclusion that the Ansible install creates multiple docker containers, including one for Lemmy and one for Postgresql. I need now to figure out how inter-container communications work but the host itself is not used.
Ah right, I assumed you were trying to connect the lemmy container to postgres running outside of docker.
One important thing to remember with all docker compose files - the service name (the first keys in the services: configuration) is also the hostname of that container so to ping lemmy (from some other container in that docker compose) you would do ping lemmy, same for postgres ping postgres - but if the postgres service was named db0 then it would be ping db0.
You also do not have to expose ports - all containers in that compose share one network (exposing is for outside access).
All together your postgres config for lemmy should like this:
database: {
# name of the postgres database for lemmy
database: "lemmy"
# username to connect to postgres
user: "postgres"
# password to connect to postgres
password: "xxxxxxx"
# host where postgres is running
host: "postgres"
# port where postgres can be accessed
port: 5432
# maximum number of active sql connections
pool_size: 10
}
Ok, the good news is that it works. The bad news is that I don’t understand what changed. 🤨
I don’t get what you mean here. Communication over (linux) socket file and TCP/IP is very different.
