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Even though it might sound related to this question, it isn't, because I'm intreseted in the use of unix sockets instead of TCP/IP ones.

However, I am unable to connect to a remote PostgreSQL database using unix sockets and an ssh tunnel with pgAdmin4. pgAdmin always claims a refused connection by the server and asks for a password, which makes me wonder. When sshing into the server and using psql a connection can be made just flawlessly using the unix socket (/var/run/postgresql). Is there anything special that needs to be set to allow such a setup, or might this even be a bug in pgAdmin itself? I'd appreciate any ideas to solve this problem without having to resort on TCP/IP connections on the remote side.

I also post some screens from my current config:

connection tab

ssh tunnel tab

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1 Answer 1

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8

That should work fine with the correct ssh command.

To forward from a local Unix socket to a remote one runs

ssh -L /tmp/.s.PGSQL.5555:/var/run/postgresql/.s.PGSQL.5432 -N laurenz@dbserver

Then you would use host /tmp and port 5555 to connect.

To forward a local TCP socket to a remote Unix socket, run:

ssh -L 5555:/var/run/postgresql/.s.PGSQL.5432 -N laurenz@dbserver

Then you would use host 127.0.0.1 and port 5555 to connect.

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4
  • Where comes that limitation from? Doesn't a ssh tunnel work similar to a fully fledged ssh session?
    – Migsi
    Nov 2, 2020 at 13:26
  • Oops. I researched and saw that I was wrong. Answer updated.
    – Laurenz Albe
    Nov 2, 2020 at 13:43
  • It looks like my assumption about ssh tunnel beeing a fully fledged session was wrong too. Thank you for the update, this seems to be a very simple solution and might work until pgAdmin adds in native support for it.
    – Migsi
    Nov 2, 2020 at 13:47
  • Accepted, works flawlessly :)
    – Migsi
    Nov 2, 2020 at 14:03

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