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quadlet: document cgroupv2 requirement

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Units created with quadlet need cgroupv2 in order to work.

Fixes #19365

Signed-off-by: Paul Holzinger <pholzing@redhat.com>
This commit is contained in:
Paul Holzinger
2023-10-19 15:39:33 +02:00
parent 0b0f128bfb
commit f2bc638944
2 changed files with 3 additions and 1 deletions
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2
docs/source/markdown/podman-systemd.unit.5.md
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@ -59,6 +59,8 @@ Adding the following snippet to a Quadlet file extends the systemd timeout to 15
TimeoutStartSec=900
```
Quadlet requires the use of cgroup v2, use `podman info --format {{.Host.CgroupsVersion}}` to check on the system.
### Service Type
By default, the `Type` field of the `Service` section of the Quadlet file does not need to be set.

2
docs/tutorials/socket_activation.md
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@ -76,7 +76,7 @@ stateDiagram-v2
s2 --> container: socket inherited via exec
```
This type of socket activation can be used in systemd services that are generated from container unit files (see [podman-systemd.unit(5)](https://docs.podman.io/en/latest/markdown/podman-systemd.unit.5.html)) or from the command [`podman generate systemd`](https://docs.podman.io/en/latest/markdown/podman-generate-systemd.1.html).
This type of socket activation can be used in systemd services that are generated from container unit files (see [podman-systemd.unit(5)](https://docs.podman.io/en/latest/markdown/podman-systemd.unit.5.html)) (Note, quadlet requires the use of cgroup v2) or from the command [`podman generate systemd`](https://docs.podman.io/en/latest/markdown/podman-generate-systemd.1.html).
The container must also support socket activation. Not all software daemons support socket activation
but it's getting more popular. For instance Apache HTTP server, MariaDB, DBUS, PipeWire, Gunicorn, CUPS
all have socket activation support.