Reg. Synology Support

[simskij]

None of us, the maintainers of this project, currently have access to any Synology devices. We've tried using the demo Synology provides, but it's just not cutting it.

If anyone in the community, or the companies using Watchtower in their stack, would like to contribute a Synology device - Please let us know! This would definitely make troubleshooting and helping you out more reasonable for us. Until then, the support for Synology will stay on a best effort-basis.

[piksel]

And just to clarify why Synology devices are singled out; they run their own version of the Docker daemon and it doesn't always behave as expected, giving incorrect or partial information of containers. This makes it hard for watchtower to function correctly on them and we have yet to find a reason for why this is happening.

[juliansteenbakker]

You could also run DSM in a virtualbox using xpenology.com!

[piksel]

Yeah, I couldn't get xpenology working last time I tried it. It also doesn't seem strictly... legal?

[juliansteenbakker]

It's a grey area.. from the FAQ:

Disk Station Manager (DSM) is based on Open Source code and XPE/DSM takes advantage of Open Source sharing and use. You should always use your own jugement and read before installing and using DSM with XPEnology. We cannot be held responsible for your actions.

I think if you don't use any of the services that need a license you'd be fine since it's open source.
The Synology source can be found here.

[tammert]

@simskij @piksel I actually own a DS218+ (it's where I run my watchtower instance), so if there's any specific troubleshooting to do I'd be happy to do it

[TheLastProject]

Running on Synology worked fine when starting manually through SSH (as there is no way to bind the docker socket from the UI):

sudo docker run --name="watchtower" -d --restart=always -v /var/run/docker.sock:/var/run/docker.sock containrrr/watchtower

After starting manually through SSH, it does show up in the Synology Docker UI.

Sadly, because labels cannot be set from the Synology UI, there is some functionality that I cannot use (like tagging containers to exclude), but alas.

For some reason, each restart done by Watchtower causes a "Docker container stopped unexpectedly. Go to Docker for more information" notification in Synology, but I don't mind that very much.

Edit: #968 happens for me for one container (Home Assistant) but not for others. I do not know why.

Edit 2: I stopped using Synology and migrated to a new device running OpenMediaVault. No issues anymore since.

[halteach]

So is this the way to start the watchtower on Synology?

Running on Synology worked fine when starting manually through SSH (as there is no way to bind the docker socket from the UI):

sudo docker run --name="watchtower" -d --restart=always -v /var/run/docker.sock:/var/run/docker.sock containrrr/watchtower

After starting manually through SSH, it does show up in the Synology Docker UI.

Sadly, because labels cannot be set from the Synology UI, there is some functionality that I cannot use (like tagging containers to exclude), but alas.

For some reason, each restart done by Watchtower causes a "Docker container stopped unexpectedly. Go to Docker for more information" notification in Synology, but I don't mind that very much.

Edit: #968 happens for me for one container (Home Assistant) but not for others. I do not know why.

[lazou]

@halteach Yes, this would be one way. Another way would be to use docker-compose, but this still requires a terminal via SSH.
I use the following docker-compose.yml

version: "3.8"
services:
  watchtower:
    image: containrrr/watchtower:latest
    container_name: watchtower
    environment:
      - TZ=Europe/Berlin
      - WATCHTOWER_CLEANUP=true
      - WATCHTOWER_INCLUDE_STOPPED=true
      - WATCHTOWER_REVIVE_STOPPED=false
      - WATCHTOWER_SCHEDULE=0 0 2 * * *
      - WATCHTOWER_MONITOR_ONLY=false
      - WATCHTOWER_DEBUG=true
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    restart: unless-stopped

This file should be saved into an own folder (e.g. watchtower) within your docker directory (e.g. /volume1/docker). Then go to your new directoy within your terminal session and use the following commands:

# create and start container
docker-compose up -d
# stop and remove container
docker-compose down

[newadventure079]

I get the error too every time watchtower runs

[piksel]

@newadventure079 have you checked what the "more information" says? We have nothing to go on here.