xgiovio/zfs-automatic-snapshots
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added config to manage keep for every cron

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This commit is contained in:
Giovanni Di Grezia
2026-10-10 17:40:44 +02:00
parent 781e133477
commit 902154001a
8 changed files with 43 additions and 10 deletions
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19
Makefile
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@@ -1,18 +1,27 @@
.PHONY: all install uninstall
# Load retention configuration (KEEP_FREQUENT, KEEP_HOURLY, KEEP_DAILY, KEEP_WEEKLY, KEEP_MONTHLY)
include zfs-auto-snapshot.conf
all:
# Install or update cron files with configured retention values
install:
install -d /etc/cron.d
install -d /etc/cron.daily
install -d /etc/cron.hourly
install -d /etc/cron.weekly
install -d /etc/cron.monthly
install -m 0644 etc/zfs-auto-snapshot.cron.frequent /etc/cron.d/zfs-auto-snapshot
install -m 0755 etc/zfs-auto-snapshot.cron.hourly /etc/cron.hourly/zfs-auto-snapshot
install -m 0755 etc/zfs-auto-snapshot.cron.daily /etc/cron.daily/zfs-auto-snapshot
install -m 0755 etc/zfs-auto-snapshot.cron.weekly /etc/cron.weekly/zfs-auto-snapshot
install -m 0755 etc/zfs-auto-snapshot.cron.monthly /etc/cron.monthly/zfs-auto-snapshot
sed 's/@KEEP_FREQUENT@/$(KEEP_FREQUENT)/g' etc/zfs-auto-snapshot.cron.frequent > /etc/cron.d/zfs-auto-snapshot
chmod 0644 /etc/cron.d/zfs-auto-snapshot
sed 's/@KEEP_HOURLY@/$(KEEP_HOURLY)/g' etc/zfs-auto-snapshot.cron.hourly > /etc/cron.hourly/zfs-auto-snapshot
chmod 0755 /etc/cron.hourly/zfs-auto-snapshot
sed 's/@KEEP_DAILY@/$(KEEP_DAILY)/g' etc/zfs-auto-snapshot.cron.daily > /etc/cron.daily/zfs-auto-snapshot
chmod 0755 /etc/cron.daily/zfs-auto-snapshot
sed 's/@KEEP_WEEKLY@/$(KEEP_WEEKLY)/g' etc/zfs-auto-snapshot.cron.weekly > /etc/cron.weekly/zfs-auto-snapshot
chmod 0755 /etc/cron.weekly/zfs-auto-snapshot
sed 's/@KEEP_MONTHLY@/$(KEEP_MONTHLY)/g' etc/zfs-auto-snapshot.cron.monthly > /etc/cron.monthly/zfs-auto-snapshot
chmod 0755 /etc/cron.monthly/zfs-auto-snapshot
install -d /usr/local/sbin
install -m 0755 src/zfs-auto-snapshot.sh /usr/local/sbin/zfs-auto-snapshot

13
README.md
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@@ -19,6 +19,19 @@ Originally adapted from https://github.com/zfsonlinux/zfs-auto-snapshot
make install
```
## Configuration
Snapshot retention limits can be configured in `zfs-auto-snapshot.conf`:
- `KEEP_FREQUENT`: snapshots rotated every 15 minutes (default: `4`)
- `KEEP_HOURLY`: hourly snapshots (default: `24`)
- `KEEP_DAILY`: daily snapshots (default: `31`)
- `KEEP_WEEKLY`: weekly snapshots (default: `12`)
- `KEEP_MONTHLY`: monthly snapshots (default: `12`)
To apply configuration changes and update installed cron files, run:
```sh
make install
```
## Uninstallation
```sh
make uninstall

2
etc/zfs-auto-snapshot.cron.daily
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@@ -4,4 +4,4 @@ PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:$PATH"
# Only call zfs-auto-snapshot if it's available
command -v zfs-auto-snapshot >/dev/null 2>&1 || exit 0
exec zfs-auto-snapshot --label daily --keep 31
exec zfs-auto-snapshot --label daily --keep @KEEP_DAILY@

2
etc/zfs-auto-snapshot.cron.frequent
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@@ -1,3 +1,3 @@
PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
*/15 * * * * root command -v zfs-auto-snapshot >/dev/null 2>&1 && exec zfs-auto-snapshot --label quarterhour --keep 4
*/15 * * * * root command -v zfs-auto-snapshot >/dev/null 2>&1 && exec zfs-auto-snapshot --label quarterhour --keep @KEEP_FREQUENT@

2
etc/zfs-auto-snapshot.cron.hourly
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@@ -4,4 +4,4 @@ PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:$PATH"
# Only call zfs-auto-snapshot if it's available
command -v zfs-auto-snapshot >/dev/null 2>&1 || exit 0
exec zfs-auto-snapshot --label hourly --keep 24
exec zfs-auto-snapshot --label hourly --keep @KEEP_HOURLY@

2
etc/zfs-auto-snapshot.cron.monthly
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@@ -4,4 +4,4 @@ PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:$PATH"
# Only call zfs-auto-snapshot if it's available
command -v zfs-auto-snapshot >/dev/null 2>&1 || exit 0
exec zfs-auto-snapshot --label monthly --keep 12
exec zfs-auto-snapshot --label monthly --keep @KEEP_MONTHLY@

2
etc/zfs-auto-snapshot.cron.weekly
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@@ -4,4 +4,4 @@ PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:$PATH"
# Only call zfs-auto-snapshot if it's available
command -v zfs-auto-snapshot >/dev/null 2>&1 || exit 0
exec zfs-auto-snapshot --label weekly --keep 12
exec zfs-auto-snapshot --label weekly --keep @KEEP_WEEKLY@

11
zfs-auto-snapshot.conf Normal file
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@@ -0,0 +1,11 @@
# ==============================================================================
# zfs-auto-snapshot Retention Configuration
# ==============================================================================
# Number of snapshots to retain for each cron schedule.
# Modify these values and run 'make install' to apply.
KEEP_FREQUENT=4
KEEP_HOURLY=24
KEEP_DAILY=31
KEEP_WEEKLY=12
KEEP_MONTHLY=12