Massively reduce the time it takes running the test by building a
proper root disk image and increasing the virtualized core count to
4. This should make it much easier for the tests to pass even on
weaker systems.
With my laptop (AMD Ryzen 7 PRO 2700U) as the reference system, I see
the following test run times:
- No change:
Times out after 28 mins
- Building a root image:
7 mins, 48 secs
- Building a root image and bumping the core count:
7 mins, 17 secs
The times include the time it takes to build the image
(~1 min, 20 secs).
Massively reduce the time it takes running the test by building a
proper root disk image and increasing the virtualized core count to
4. This should make it much easier for the tests to pass even on
weaker systems.
With my laptop (AMD Ryzen 7 PRO 2700U, 32GB RAM) as the reference
system, I see the following test run times:
- No change:
25 mins, 49 secs
- Building a root image:
4 mins, 44 secs
- Building a root image and bumping the core count:
3 mins, 6 secs
The times include the time it takes to build the image (~40 secs).
Make sure the all derivations referenced by the test script are
available on the nodes. Accessing these derivations works just fine
without this change when using 9p to mount the host's store, but when
an image is built (virtualisation.buildRootImage), the dependencies
need to be copied to the image. We don't want to copy the script
itself, though, since that would trigger unnecessary image rebuilds.
pathsInNixDB isn't a very accurate name when a Nix store image is
built (virtualisation.useNixStoreImage); rename it to additionalPaths,
which should be general enough to cover both cases.
Add the `useNixStoreImage` option, allowing a disk image with the
necessary contents from the Nix store to be built using
make-disk-image.nix. The image will be mounted at `/nix/store` and
acts as a drop-in replacement for the usual 9p mounting of the host's
Nix store.
This removes the performance penalty of 9p, drastically improving
execution speed of applications which do lots of reads from the Nix
store. The caveats are increased disk space usage and image build
time.
Add a copyChannel argument which controls whether the current source
tree will be made available as a nix channel in the image or
not. Previously, it always was. Making it available is useful for
interactive use of nix utils, but changes the hash of the image when
the sources are updated.
nixos-rebuild test causes pam_mount to prompt for a password when running with
an encrypted home:
building '/nix/store/p6bflh7n5zy2dql8l45mix9qnzq65hbk-nixos-system-mildred-18.09.git.98592c5da79M.drv'...
activating the configuration...
setting up /etc...
reenter password for pam_mount:
(mount.c:68): Messages from underlying mount program:
(mount.c:72): crypt_activate_by_passphrase: File exists
(pam_mount.c:522): mount of /dev/mapper/vg0-lv_home_peter failed
kbuildsycoca5 running...
This change makes pam_mount not prompt. It still tries to remount (and fails in
the process) but that message can be ignored.
Fixes: #44586
This is done as the s3CredentialsFile specifies the environmentFile
for the systemd service, which can be used for more than just s3.
Co-authored-by: Cole Helbling <cole.e.helbling@outlook.com>
