Troubleshooting Podman on macos

[spare mica]

I've been trying to get Podman to work with Dagger, but I can't really get the fixes at https://docs.dagger.io/troubleshooting#dagger-restarts-with-a-cni-setup-error to work in a sticky way.

I e, everytime I restart podman I have to manually run podman machine ssh 'sudo modprobe iptable_nat' in order for Dagger to be able to communicate with Podman. Is there something I'm missing with my setup that is not covered by the Dagger docs?

[spare mica]

After speaking a bit with the friendly people at the Podman community it turns out that the troubleshooting idea presented on the Dagger page above actually works - you just have to put a .conf-suffix to the file. This is the only way that the iptable_nat will be loaded.

[solar crown]

@spare mica so adding a new file withing /etc/modules-load.d/ with a .conf extension IIUC?

[spare mica]

exactly that! I was wondering why this didnt work at all (following the Dagger troubleshooting guide) and was lucky enough to get some answers from one of the Podman maintainers,. I've also tested this locally and verified that it works.

[solar crown]

ok.. interesting.. did they mention anything why modifying the existing modules file doesn't seem to have any effect?

just validating that we should update our docs

maybe.. the file has been renamed to something like modules.conf and our docs broke at some point? 🤔

[spare mica]

I thin a lot of changes has happened. Dunno when that doc is from, but I was on Podman Machine OS 5.3 (started using podman about 1 year ago), 5.5 is current. on 5.3 there is a /etc/modules-load.d/ directorfy that's completely empty. In 5.5 there's actually a podman-iptables.conf file in there which loads these modules:

ip_tables
ip6_tables

basically, any file named just modules will never be loaded due to the way that modules-moad.d is set to work -> https://man7.org/linux/man-pages/man5/modules-load.d.5.html

in short, it will look for files like these:

           /etc/modules-load.d/*.conf
           /run/modules-load.d/*.conf
           /usr/local/lib/modules-load.d/*.conf
           /usr/lib/modules-load.d/*.conf

[spare mica]

Sorry I missed this question, but the man page above is the reason they said

[solar crown]

👍 perfect. I'll udpate the docs now. Appreciate it 🙏

https://github.com/dagger/dagger/pull/10808