# Relay in docker keep the same id
**URL:** https://forum.syncthing.net/t/relay-in-docker-keep-the-same-id/21792
**Category:** Support
**Created:** [March 13, 2024, 4:33pm UTC](https://forum.syncthing.net/t/relay-in-docker-keep-the-same-id/21792 "2024-03-13T16:33:32Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Chucky2401](https://forum.syncthing.net/u/Chucky2401)
#### Post date: [March 13, 2024, 4:33pm UTC](https://forum.syncthing.net/t/relay-in-docker-keep-the-same-id/21792/1 "2024-03-13T16:33:33Z")
Hi, I created a docker image to have my private relay because of my company block Syncthing due to the classification by the firewall as a P2P.
Everything is working fine (I use Alpine and S6-overlay and I stream through NGinx Proxy Manager from an authorize port in my company). I use as reference the Dockerfile on the GitHub.
But I’m facing a long-term problem. That is, everytime I stop, delete and recreate the container (with docker compose), my relay ID change. It does not happened every day, but when this happen, I need to change my clients sync protocol listen address.
Actually, I have only the /var/strelaysrv, as the GitHub, but may be there is something else to mount to keep this ID? I don’t know, it’s just a theory.
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### Author:  [@er-pa](https://forum.syncthing.net/u/er-pa)
#### Post date: [March 13, 2024, 5:08pm UTC](https://forum.syncthing.net/t/relay-in-docker-keep-the-same-id/21792/2 "2024-03-13T17:08:36Z")
As far as I know the relay server uses keys to form an ID. The key-dir is per default `.`, the working directory `/var/strelaysrv` (inside the container). Either keys are created, if not present, or re-used. So if you map a volume `/dir/outside/docker/:/var/strelaysrv` then it should keep the same id.
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### Author:  [@Chucky2401](https://forum.syncthing.net/u/Chucky2401)
#### Post date: [March 13, 2024, 7:33pm UTC](https://forum.syncthing.net/t/relay-in-docker-keep-the-same-id/21792/3 "2024-03-13T19:33:05Z")
My bad, I’m an idiot…
I had an error in my first build, that said it didn’t have permission to create **.pem file**. I added the parameter `-keys="/etc/strelaysrv"` as in the doc…
I add a `cd` to the **/var/strelaysrv** and run the relay several times, it works! I don’t know why I have to do a `cd`, as the directory is the home of the user, but maybe s6-overlay have to work like this.
Anyway, problem solved!
Thank you very much!
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### Author:  [@er-pa](https://forum.syncthing.net/u/er-pa)
#### Post date: [March 14, 2024, 12:21pm UTC](https://forum.syncthing.net/t/relay-in-docker-keep-the-same-id/21792/4 "2024-03-14T12:21:51Z")
Good to hear that it was resolved:)
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### Author:  [@system](https://forum.syncthing.net/u/system)
#### Post date: [April 13, 2024, 12:22pm UTC](https://forum.syncthing.net/t/relay-in-docker-keep-the-same-id/21792/5 "2024-04-13T12:22:12Z")
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