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Merge pull request #11074 from vrothberg/auto-update-rollback

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auto-update: simple rollback
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openshift-ci[bot]
2021-08-06 12:26:31 +00:00
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parent 0eb2a02620 30df551bde
commit 8409817733
8 changed files with 249 additions and 44 deletions
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docs/source/markdown/podman-auto-update.1.md
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@ -51,6 +51,15 @@ The `UPDATED` field indicates the availability of a new image with "pending".
Change the default output format. This can be of a supported type like 'json' or a Go template.
Valid placeholders for the Go template are listed below:
#### **--rollback**=*true|false*
If restarting a systemd unit after updating the image has failed, rollback to using the previous image and restart the unit another time. Default is true.
Please note that detecting if a systemd unit has failed is best done by the container sending the READY message via SDNOTIFY. This way, restarting the unit will wait until having received the message or a timeout kicked in. Without that, restarting the systemd unit may succeed even if the container has failed shortly after.
For a container to send the READY message via SDNOTIFY it must be created with the `--sdnotify=container` option (see podman-run(1)). The application running inside the container can then execute `systemd-notify --ready` when ready or use the sdnotify bindings of the specific programming language (e.g., sd_notify(3)).
| **Placeholder** | **Description** |
| --------------- | -------------------------------------- |
| .Unit | Name of the systemd unit |
@ -132,4 +141,4 @@ $ podman auto-update
```
## SEE ALSO
**[podman(1)](podman.1.md)**, **[podman-generate-systemd(1)](podman-generate-systemd.1.md)**, **[podman-run(1)](podman-run.1.md)**, systemd.unit(5)
**[podman(1)](podman.1.md)**, **[podman-generate-systemd(1)](podman-generate-systemd.1.md)**, **[podman-run(1)](podman-run.1.md)**, sd_notify(3), systemd.unit(5)