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Add support to auto-update containers running in systemd units as
generated with `podman generate systemd --new`.
`podman auto-update` looks up containers with a specified
"io.containers.autoupdate" label (i.e., the auto-update policy).
If the label is present and set to "image", Podman reaches out to the
corresponding registry to check if the image has been updated. We
consider an image to be updated if the digest in the local storage is
different than the one of the remote image. If an image must be
updated, Podman pulls it down and restarts the container. Note that the
restarting sequence relies on systemd.
At container-creation time, Podman looks up the "PODMAN_SYSTEMD_UNIT"
environment variables and stores it verbatim in the container's label.
This variable is now set by all systemd units generated by
`podman-generate-systemd` and is set to `%n` (i.e., the name of systemd
unit starting the container). This data is then being used in the
auto-update sequence to instruct systemd (via DBUS) to restart the unit
and hence to restart the container.
Note that this implementation of auto-updates relies on systemd and
requires a fully-qualified image reference to be used to create the
container. This enforcement is necessary to know which image to
actually check and pull. If we used an image ID, we would not know
which image to check/pull anymore.
Fixes: #3575
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
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Move the dbus-connection code from libpod's healthcheck to pkg/systemd
to allow for sharing the logic. Needed for the auto-updates work.
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
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Add the `default.target` to the failing tests.
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
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systemd generator: force run container detached if CreateCommand has no detach param
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the podman generated systemd service file has `Type=forking` service,
so the command after `ExecStart=` should not run in front.
if someone created a container and has the detach(`-d`) param missing
like this
```
podman create --name ngxdemo -P nginxdemos/hello
```
and generate the file with `--new` param:
```
podman generate systemd --name --new ngxdemo
```
because `podman run xxx` has no `-d` param,
so the container is not run in background and nerver exit.
and systemd will fail to start the service:
```
sudo systemctl start container-ngxdemo.service
Job for container-ngxdemo.service failed because a timeout was exceeded.
See "systemctl status container-ngxdemo.service" and "journalctl -xe" for details.
```
Signed-off-by: 荒野無燈 <ttys3@outlook.com>
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When enabling a systemd service we can specify which target will start
it by specifying it in the `[INSTALL]` section. In case of root, this
is commonly set to `multi-user.target` which is used to start other
essential system services such as the network manager, D-BUS and more.
However, the `multi-user.target` is not enough on all systems,
especially when running rootless and enabling user services. Multiple
users have reported issues that there isn't even an attempt to start the
service.
Setting the INSTALL target to `default.target` will fix the rootless
case. However, `default.target` may vary among systems. Fedora
Workstation, for instance, sets the `default.target` to the graphical
target (i.e., runlevel 5) while Fedora Server sets it to
`multi-user.target` which is on runlevel 2 and hence way earlier in the
startup sequence.
As INSTALL allows for specifying multiple INSTALL targets, we can set it
to `multi-user.target` to continue supporting existing workloads AND to
`default.target` which MAY redundantly attempt to start it at a later point;
effectively a NOP for the root case and essential for rootless.
Fixes: #5423
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
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Remove leading slashes from the run-dir paths. It was meant to make it
explicit that we're dealing with an absolute path but user feedback has
shown that most are aware. It also cleans up the path in the systemctl
status output.
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
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Add network dependencies to generated systemd services to allow for
enabling them at system startup and have a working network if needed.
Fixes: #4130
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
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On panic from handler: log warning and stack trace, report
InternalServerError to client
When using `podman system service` make determining the listening endpoint deterministic.
// When determining _*THE*_ listening endpoint --
// 1) User input wins always
// 2) systemd socket activation
// 3) rootless honors XDG_RUNTIME_DIR
// 4) if varlink -- adapter.DefaultVarlinkAddress
// 5) lastly adapter.DefaultAPIAddress
Fixes #5150
Fixes #5151
Signed-off-by: Jhon Honce <jhonce@redhat.com>
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