Mounting docker socket to dagger Container

[raw kindle]

Description

I need to run a container that needs to run a nested conatiner inside. What is the best approach?

What I have tried so far

I was looking in the sdk and there is a Socket type. However cannot use it because if i set it as an input in my function then I get the following error message failed to get field spec: failed to decode default value for arg "socket": decode "Socket" ID: cannot decode ID from "unix:///var/run/docker.sock": illegal base64 data at input byte 4

As an alternative I also tried using Host().UnixSocket(...) but as expected won't work because access to Host object has been removed in last release.

[slim sluice]

Hey @raw kindle 👋 ,
Could you share a snippet of your code, please?

Did you try the method WithUnixSocket that forwarded to the given Unix socket path?

[dull stratus]

hey there! it's not possible currently. You can follow this issue for future updates: https://github.com/dagger/dagger/issues/6747

[forest stirrup]

^^ This works great for me, I also have an example of docker in docker and podman in docker for dagger if you would like

https://github.com/jumppad-labs/daggerverse/tree/main/jumppad

[dull stratus]

hey @raw kindle ! just realized that I haven't answered your question entirely. You can run containers in Dagger by spawning Docker, Podman, etc inside a Dagger pipeline as Nic is correctly pointing out. What you can't do for the moment is to pass your own machine's docker engine unix socket to the Dagger pipeline which will be address in the issue that I posted above

If you need some additional help with Nic's approach, we're here to help 🙌

[raw kindle]

Yeah i can definetely share a snippet of the code, the issue itself wasn't about the method WithUnixSocket not working but instead the possibility of receiving the socket via a cli argument with the new dagger functions as @dull stratus pointed out.

[raw kindle]

Gonna try this out, if i find any problem I'll definetely reach you out @dull stratus. Btw was nice talking with you at kubecon 😄

[dull stratus]

It's always awesome to connect with new users. We're here to help you succeed in your Dagger joruney 😄

[raw kindle]

Managed to make it work, thanks @forest stirrup and @dull stratus 😄

[lavish trail]

hey @raw kindle would you mind sharing your approach to get it solved? I've a similar issue when running buildpacks (pack cli) on dagger

[raw kindle]

i basically created a podman service and export it over http, then i set DOCKER_HOST to that service where i need to use the container engine https://github.com/jalvarezit/daggerverse

[lavish trail]

Thanks for sharing, I've been testing sharing the socket but since Host is not avaible in function context this looks pretty good.

[raw kindle]

np 😛