From mboxrd@z Thu Jan  1 00:00:00 1970
From: Pierre Neidhardt <mail@ambrevar.xyz>
Subject: Service dockerd could not be started. (Kernel module 'overlay' not
 loaded.)
Date: Wed, 11 Mar 2020 11:59:24 +0100
Message-ID: <877dzr2m43.fsf@ambrevar.xyz>
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Hi!

I've just added (service docker-service-type) to my list of services,
then run a `guix system reconfigure`, but dockerd fails to start.

/var/log/docker.log reports:

=2D-8<---------------cut here---------------start------------->8---
time=3D"2020-03-11T11:45:41.325992616+01:00" level=3Derror msg=3D"'overlay'=
 not found as a supported filesystem on this host. Please ensure kernel is =
new enough and has overlay support loaded." storage-driver=3Doverlay2
time=3D"2020-03-11T11:45:41.326017293+01:00" level=3Derror msg=3D"[graphdri=
ver] prior storage driver overlay2 failed: driver not supported"
=2D-8<---------------cut here---------------end--------------->8---

Turns out that I needed

=2D-8<---------------cut here---------------start------------->8---
sudo modprobe overlay
sudo herd restart dockerd
=2D-8<---------------cut here---------------end--------------->8---

Can't Guix make sure the overlay module is loaded when the dockerd?

Related question: Can we configure Guix to load given modules on
startup?  (Not in the initrd.)

Cheers!

=2D-=20
Pierre Neidhardt
https://ambrevar.xyz/

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