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Issues hosting Lemmy (via ansible) (lemmy.world)
submitted 3 years ago* (last edited 3 years ago) by to c/selfhosted@lemmy.world
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(Using https://github.com/LemmyNet/lemmy-ansible)

The ansible-playbook command itself connected to the VPS and completed without any errors or warnings. This is on a completely fresh VPS with Ubuntu Server 22.04.

I created all directories needed in the guide, and the only file I modified was the inventory/hosts file - filling in the username/domain for SSH, domain name, contact email and adding the location of the private key for SSH.

The guide didn't note any changes to config.hjson I needed to make, so I copied that file as requested but left it with the default content. I'm thinking if I missed something it's most likely there.

I couldn't access the web UI and with some investigation I found the dessalines/lemmy:0.17.4 (backend) container is continually restarting, apparently because it can't reach the database - sudo docker container logs <id> returns the following:

thread 'main' panicked at 'Error connecting to postgres://lemmy:PasswordRedacted@postgres:5432/lemmy', crates/db_schema/src/utils.rs:161:56

I'm not sure what to do at this point, so I would be very appreciative of any help with this issue.

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[–] [S] 0 points 3 years ago* (last edited 3 years ago) (1 child)

Wiped the VPS clean, new 22.04 server install.

Deployed using that installer.

Exact same issue. The lemmy container cannot reach the database and continually restarts. I'll post some logs, but they're practically identical to what I posted before:

lemmy container logs:

`thread 'main' panicked at 'Error connecting to postgres://lemmy:PasswordRedacted@postgres:5432/lemmy', crates/db_schema/src/utils.rs:161:56

sudo docker ps output:

CONTAINER ID   IMAGE                        COMMAND                  CREATED          STATUS
 PORTS                                                                                         NAMES
9eaa62ea6f99   caddy:latest                 "caddy run --config …"   12 minutes ago   Up 12 minutes
 0.0.0.0:80->80/tcp, :::80->80/tcp, 0.0.0.0:443->443/tcp, :::443->443/tcp, 443/udp, 2019/tcp   lemmy-easy-deploy-proxy-1
a10009ed128d   dessalines/lemmy-ui:0.17.4   "docker-entrypoint.s…"   12 minutes ago   Up 12 minutes
                                                                                               lemmy-easy-deploy-lemmy-ui-1
a166b1486d51   dessalines/lemmy:0.17.4      "/app/lemmy"             12 minutes ago   Restarting (101) 41 seconds ago                                                                                                 lemmy-easy-deploy-lemmy-1
08329653260b   asonix/pictrs:0.3.1          "/sbin/tini -- /usr/…"   12 minutes ago   Up 12 minutes
 6669/tcp, 8080/tcp                                                                            lemmy-easy-deploy-pictrs-1
51af8f312511   postgres:15-alpine           "docker-entrypoint.s…"   12 minutes ago   Up 12 minutes
lemmy-easy-deploy-postgres-1
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  • [–] 1 point 3 years ago

    well, that rules out your local system and ansible, at least. It seems like there's an inability for the docker containers to reach postgres definitely at the install and probably at runtime - can we check this?

    first let's make sure the postgres container is on the network and has an address:

    sudo docker exec -it <yourinstance>_postgres_1 /bin/sh

    once you're on the container

    ifconfig

    which should return on the second line: inet addr:172.18.0.4 (or similar ipV4 address)

    exit to return to the host and let's test connecting from the host :

    nc -zv 172.18.0.4 5432 (use IP from the DB container)

    Ubuntu host should respond something like : Connection to 172.18.0.4 5432 port [tcp/postgresql] succeeded!

    now let's try the containers

    sudo docker exec -it <yourinstance>_lemmy-ui_1 /bin/sh

    now from that container test connectivity to postgres:

    nc -zv 172.18.0.4 5432 (use IP from the DB container)

    now the other

    sudo docker exec -it <yourinstance>_lemmy_1 /bin/sh

    on the docker containers the nc command should return something like

    172.18.0.4 (172.18.0.4:5432) open

    is that working?

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