This leverages conmon's ability to proxy the SD-NOTIFY socket.
This prevents locking caused by OCI runtime blocking, waiting for
SD-NOTIFY messages, and instead passes the messages directly up
to the host.
NOTE: Also re-enable the auto-update tests which has been disabled due
to flakiness. With this change, Podman properly integrates into
systemd.
Fixes: #7316
Signed-off-by: Joseph Gooch <mrwizard@dok.org>
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
Add support for simple rollbacks during `podman auto-update`. Rollbacks
are enabled by default. If a systemd unit cannot be restarted after an
update, the previous image will be retagged and the unit will be
restarted a second time.
Add system tests for rollbacks. Also fix a bug in the restart sequence;
we have to use the channel to actually know whether the restart was
successful or not.
NOTE: To make rollbacks really useful, users must run their containers
with `--sdnotify=container` such that the containers send the ready
message over the (mounted) socket. This way, restarting the systemd
units during auto update will block until the message has been received
(or a timeout kicked in).
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
If the systemd version is older than v245, the systemd uses 'Started'
when a oneshot service finishes.
In systemd, the change was done at:
https://github.com/systemd/systemd/pull/14851
commit-id: eda0cbf07186d16a160bd1d810613586fdbdf587
Signed-off-by: Hironori Shiina <shiina.hironori@jp.fujitsu.com>
First and foremost: use ephemeral (/run, $XDG) directories
for systemd unit files, so as not to vandalize a working system.
Second, refactor common systemd-related functionality into
a new helper file, loaded by the systemd-related tests.
Shared functionality includes:
* setting $XDG_RUNTIME_DIR if unset and rootless
* setting $UNIT_DIR for use by tests
* new systemctl() and journalctl() functions, which
include "--user" when rootless (why can't systemd
figure this out on its own?)
Signed-off-by: Ed Santiago <santiago@redhat.com>
auto-update test is failing on non-x86_64 arch:
https://gitlab.com/cki-project/kernel-tests/-/issues/614#note_630010734
Reason: test was relying on alpine_nginx image; this is
a custom libpod image that only has a x86_64 version.
Solution: use busybox instead. Busybox was copied from
docker.io using skopeo copy --all, so it has all arches.
Signed-off-by: Ed Santiago <santiago@redhat.com>
They were being skipped for no clear reason.
Also: use --files and --name option in generate-systemd. Before,
output went to stdout, resulting in completely unreadable logs
on test failure.
Also: use volatile systemd directories (/run, $XDG_RUNTIME_DIR)
instead of permanent ones. Thanks to @Luap99 for the reference.
Signed-off-by: Ed Santiago <santiago@redhat.com>
Require the network to be online in all (generated) systemd units to
make sure that containers and Podman run only after the network has been
fully configured.
Fixes: #10655
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
Add a --dry-run flag to `podman auto-update` which will look for new
images but won't perform any pull or restart any service or container.
The "UPDATED" column will now indicate the availability of a newer image
via "pending".
```
$ podman auto-update --dry-run
UNIT CONTAINER IMAGE POLICY UPDATED
container-test.service 08fd34e533fd (test) localhost:5000/busybox registry false
```
Fixes: #9949
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
The rather raw and scarce output of `podman auto-update` has been a
thorn in my eyes for a longer while. So far, Podman would only print
updated systemd units, one per line, without further formatting.
Motivated by issue #9949 which is asking for some more useful
information in combination with a dry-run feature, I sat down and
reflected which information may come in handy.
Running `podman auto-update` will now look as follows:
```
$ podman auto-update
Trying to pull [...]
UNIT CONTAINER IMAGE POLICY UPDATED
container-test.service 08fd34e533fd (test) localhost:5000/busybox registry false
```
Also refactor the spaghetti code in the backend a bit to make it easier
to digest and maintain.
For easier testing and for the sake of consistency with other commands
listing output, add a `--format` flag.
The man page will get an overhaul in a follow up commit.
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
The output of auto-update leaves quite some space for improvements. One
thing is to make it more obvious which systemd units were restarted.
With this change, the output looks as follows:
```
$ podman auto-update
Trying to pull...
Restarted the following systemd units:
$unit-1
$unit-2
$unit-3
```
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
Much to my regret, there is a number of images in the wild with invalid
platforms breaking the platform checks in libimage that want to make
sure that a local image is matching the expected platform.
Imagine a `podman run --arch=arm64 fedora` with a local amd64 fedora
image. We really shouldn't use the local one in this case and pull down
the arm64 one.
The strict platform checks in libimage in combination with invalid
platforms in images surfaced in Podman being able to pull an image but
failing to look it up in subsequent presence checks. A `podman run`
would hence pull such an image but fail to create the container.
Support images with invalid platforms by vendoring the latest HEAD from
containers/common. Also remove the partially implemented pull-policy
logic from Podman and let libimage handle that entirely. However,
whenever --arch, --os or --platform are specified, the pull policy will
be forced to "newer". This way, we pessimistically assume that the
local image has an invalid platform and we reach out to the registry.
If there's a newer image (i.e., one with a different digest), we'll pull
it down.
Please note that most of the logic has either already been implemented
in libimage or been moved down which allows for removing some clutter
from Podman.
[NO TESTS NEEDED] since c/common has new tests. Podman can rely on the
existing tests.
Fixes: #10648Fixes: #10682
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
Followup to #9740. Nice work, but the _confirm_update() helper
was dangerously broken and I just wasn't able to communicate
that. Given the time zone difference, and my weekly time cost
in reviewing, it's easier for me to fix it myself. (The problem
is that the function was a complete NOP, which would lead to
flakes).
Also: got rid of some clutter, restructured a few minor places
for maintainability.
Signed-off-by: Ed Santiago <santiago@redhat.com>
Add some cases for podman auto-update:
1. Test with different value for label io.containers.autoupdate
2. Run podman auto-update as systemd timer
Signed-off-by: Yiqiao Pu <ypu@redhat.com>
