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Exposing docker socket to a container (discuss.tchncs.de)

submitted 2 days ago by 5ymm3trY@discuss.tchncs.de to c/selfhosted@lemmy.world

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Do you guys expose the docker socket to any of your containers or is that a strict no-no? What are your thoughts behind it if you don't? How do you justify this decision from a security standpoint if you do?

I am still fairly new to docker but I like the idea of something like Watchtower. Even though I am not a fan of auto-updates and I probably wouldn't use that feature I still find it interesting to get a notification if some container needs an update. However, it needs to have access to the docker socket to do its work and I read a lot about that and that this is a bad idea which can result in root access on your host filesystem from within a container.

There are probably other containers as well especially in this whole monitoring and maintenance category, that need that privilege, so I wanted to ask how other people handle this situation.

Cheers!

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[–] 5ymm3trY@discuss.tchncs.de 1 points 2 days ago

I think I get where your coming from. In this specific case of Watchtower it is not a security flaw it just uses the socket to do what it is supposed to do. You either trust them and live with the risks it comes with or you don't and find another solution. I used Watchtower as the example because it was the first one I came across that needs this access. There might be a lot of other containers out there that use this, so I wanted to hear peoples opinions on this topic and their approach.