patrick/zfs_autobackup
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Allow multiple --pre/post-snapshot-cmd options. Add a usage example.

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Phil Krylov
2021-06-16 23:19:29 +03:00
parent ec9459c1d2
commit 55ff14f1d8
3 changed files with 31 additions and 11 deletions
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README.md
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@ -279,6 +279,19 @@ root@ws1:~# zfs-autobackup test --verbose
This also allows you to make several snapshots during the day, but only backup the data at night when the server is not busy.
## 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, try:
```sh
zfs-autobackup \
--pre-snapshot-cmd 'daemon -fP /tmp/mysql1_lock.pid jexec mysqljail1 mysql -s -e "set autocommit=0;flush logs;flush tables with read lock;\\! sleep 60"' \
--pre-snapshot-cmd 'daemon -fP /tmp/mysql2_lock.pid jexec mysqljail2 mysql -s -e "set autocommit=0;flush logs;flush tables with read lock;\\! sleep 60"' \
--post-snapshot-cmd 'pkill -F /tmp/mysql1_lock.pid' \
--post-snapshot-cmd 'pkill -F /tmp/mysql2_lock.pid' \
test
```
## Thinning out obsolete snapshots
The thinner is the thing that destroys old snapshots on the source and target.
@ -493,7 +506,8 @@ Look in man ssh_config for many more options.
```console
usage: zfs-autobackup [-h] [--ssh-config CONFIG-FILE] [--ssh-source USER@HOST]
[--ssh-target USER@HOST] [--keep-source SCHEDULE]
[--keep-target SCHEDULE] [--other-snapshots]
[--keep-target SCHEDULE] [--pre-snapshot-cmd COMMAND]
[--post-snapshot-cmd COMMAND] [--other-snapshots]
[--no-snapshot] [--no-send] [--no-thinning] [--no-holds]
[--min-change BYTES] [--allow-empty]
[--ignore-replicated] [--strip-path N]
@ -531,6 +545,12 @@ optional arguments:
--keep-target SCHEDULE
Thinning schedule for old target snapshots. Default:
10,1d1w,1w1m,1m1y
--pre-snapshot-cmd COMMAND
Run COMMAND before snapshotting (can be used multiple
times.
--post-snapshot-cmd COMMAND
Run COMMAND after snapshotting (can be used multiple
times.
--other-snapshots Send over other snapshots as well, not just the ones
created by this tool.
--no-snapshot Don't create new snapshots (useful for finishing