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pre/post cmd tests

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Edwin Eefting
2021-06-22 12:43:52 +02:00
parent 119225ba5b
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README.md
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@ -419,7 +419,9 @@ decompression -> custom recv pipes -> buffer -> zfs recv
## Running custom commands before and after snapshotting
If you need, e.g. to quiesce a couple of mysql databases to make on-disk data consistent before snapshotting, you can use the `--pre-snapshot-cmd` and `--post-snapshot-cmd` options.
You can run commands before and after the snapshot to freeze databases to make the on for example to make the on-disk data consistent before snapshotting.
The commands will be executed on the source side. Use the `--pre-snapshot-cmd` and `--post-snapshot-cmd` options for this.
For example:
@ -432,9 +434,10 @@ zfs-autobackup \
backupfs1
```
The post-snapshot commands are ALWAYS executed, even if a pre-snapshot command or the actual snapshot fail.
Failure handling during pre/post commands:
A failure of a post-snapshot command is non-fatal and will be ignored. The remaining post-snapshot commands wont be executed in that case.
* If a pre-command fails, zfs-autobackup will exit with an error. (after executing the post-commands)
* All post-commands are always executed. Even if the pre-commands or actual snapshot have failed. This way you can be sure that stuff is always cleanedup and unfreezed.
## Tips