From e2bc399c024df30b2ce0b3e22962b9d59e6cd8e5 Mon Sep 17 00:00:00 2001
From: admin <admin@localhost.localdomain>
Date: Thu, 16 Apr 2020 01:49:22 +0200
Subject: [PATCH] first commit , first release

---
 Makefile                            |  26 +++++++
 README.md                           |  40 +++++------
 etc/zfs-auto-snapshot.cron.daily    |   7 ++
 etc/zfs-auto-snapshot.cron.frequent |   3 +
 etc/zfs-auto-snapshot.cron.hourly   |   7 ++
 etc/zfs-auto-snapshot.cron.monthly  |   7 ++
 etc/zfs-auto-snapshot.cron.weekly   |   7 ++
 src/zfs-auto-snapshot.sh            | 108 ++++++++++++++++++++++++++++
 8 files changed, 184 insertions(+), 21 deletions(-)
 create mode 100644 Makefile
 create mode 100644 etc/zfs-auto-snapshot.cron.daily
 create mode 100644 etc/zfs-auto-snapshot.cron.frequent
 create mode 100644 etc/zfs-auto-snapshot.cron.hourly
 create mode 100644 etc/zfs-auto-snapshot.cron.monthly
 create mode 100644 etc/zfs-auto-snapshot.cron.weekly
 create mode 100755 src/zfs-auto-snapshot.sh

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..4b0e54d
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,26 @@
+all:
+
+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 etc/zfs-auto-snapshot.cron.hourly   /etc/cron.hourly/zfs-auto-snapshot
+	install etc/zfs-auto-snapshot.cron.daily    /etc/cron.daily/zfs-auto-snapshot
+	install etc/zfs-auto-snapshot.cron.weekly   /etc/cron.weekly/zfs-auto-snapshot
+	install etc/zfs-auto-snapshot.cron.monthly  /etc/cron.monthly/zfs-auto-snapshot
+	install -d /usr/local/sbin
+	install src/zfs-auto-snapshot.sh /usr/local/sbin/zfs-auto-snapshot
+
+uninstall:
+	rm /etc/cron.d/zfs-auto-snapshot
+	rm /etc/cron.hourly/zfs-auto-snapshot
+	rm /etc/cron.daily/zfs-auto-snapshot
+	rm /etc/cron.weekly/zfs-auto-snapshot
+	rm /etc/cron.monthly/zfs-auto-snapshot
+	rm /usr/local/sbin/zfs-auto-snapshot
+
+
+
diff --git a/README.md b/README.md
index 39af52c..57d96be 100644
--- a/README.md
+++ b/README.md
@@ -1,29 +1,27 @@
 # README #
 
-This README would normally document whatever steps are necessary to get your application up and running.
+zfs-auto-snapshot scripts allow automatic snapshots of all zfs filesystems and volumes.
+The script will automatically rotate snapshots deleting old ones.
 
-### What is this repository for? ###
+It creates:
+4 snapshots for hour to rotate every 15 min
+24 hourly snapshots
+30 daily snapshots
+12 weekly snapshots
+12 yearly snapshots
 
-* Quick summary
-* Version
-* [Learn Markdown](https://bitbucket.org/tutorials/markdowndemo)
+Script has been tested on zfs on linux 0.8.3, centos 7
+Original script from https://github.com/zfsonlinux/zfs-auto-snapshot
+I semplified the code and fixed some bugs
 
-### How do I get set up? ###
+# to install
+cd to current folder
+make install
 
-* Summary of set up
-* Configuration
-* Dependencies
-* Database configuration
-* How to run tests
-* Deployment instructions
+# to uninstall
+cd to current folder
+make uninstall
 
-### Contribution guidelines ###
+# NOTE #
+uninstalling the script doesn't delete made snapshots
 
-* Writing tests
-* Code review
-* Other guidelines
-
-### Who do I talk to? ###
-
-* Repo owner or admin
-* Other community or team contact
\ No newline at end of file
diff --git a/etc/zfs-auto-snapshot.cron.daily b/etc/zfs-auto-snapshot.cron.daily
new file mode 100644
index 0000000..2403d8b
--- /dev/null
+++ b/etc/zfs-auto-snapshot.cron.daily
@@ -0,0 +1,7 @@
+#!/bin/sh
+PATH=$PATH:/usr/local/sbin
+
+# Only call zfs-auto-snapshot if it's available
+which zfs-auto-snapshot > /dev/null || exit 0
+
+exec zfs-auto-snapshot --label daily --keep 31
diff --git a/etc/zfs-auto-snapshot.cron.frequent b/etc/zfs-auto-snapshot.cron.frequent
new file mode 100644
index 0000000..d66c404
--- /dev/null
+++ b/etc/zfs-auto-snapshot.cron.frequent
@@ -0,0 +1,3 @@
+PATH="/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin"
+
+*/15 * * * * root which zfs-auto-snapshot > /dev/null || exit 0 ; zfs-auto-snapshot --label quarterhour --keep 4
diff --git a/etc/zfs-auto-snapshot.cron.hourly b/etc/zfs-auto-snapshot.cron.hourly
new file mode 100644
index 0000000..3be78eb
--- /dev/null
+++ b/etc/zfs-auto-snapshot.cron.hourly
@@ -0,0 +1,7 @@
+#!/bin/sh
+PATH=$PATH:/usr/local/sbin
+
+# Only call zfs-auto-snapshot if it's available
+which zfs-auto-snapshot > /dev/null || exit 0
+
+exec zfs-auto-snapshot --label hourly --keep 24
diff --git a/etc/zfs-auto-snapshot.cron.monthly b/etc/zfs-auto-snapshot.cron.monthly
new file mode 100644
index 0000000..6be7b12
--- /dev/null
+++ b/etc/zfs-auto-snapshot.cron.monthly
@@ -0,0 +1,7 @@
+#!/bin/sh
+PATH=$PATH:/usr/local/sbin
+
+# Only call zfs-auto-snapshot if it's available
+which zfs-auto-snapshot > /dev/null || exit 0
+
+exec zfs-auto-snapshot --label monthly --keep 12
diff --git a/etc/zfs-auto-snapshot.cron.weekly b/etc/zfs-auto-snapshot.cron.weekly
new file mode 100644
index 0000000..054ce68
--- /dev/null
+++ b/etc/zfs-auto-snapshot.cron.weekly
@@ -0,0 +1,7 @@
+#!/bin/sh
+PATH=$PATH:/usr/local/sbin
+
+# Only call zfs-auto-snapshot if it's available
+which zfs-auto-snapshot > /dev/null || exit 0
+
+exec zfs-auto-snapshot --label weekly --keep 12
diff --git a/src/zfs-auto-snapshot.sh b/src/zfs-auto-snapshot.sh
new file mode 100755
index 0000000..419fc47
--- /dev/null
+++ b/src/zfs-auto-snapshot.sh
@@ -0,0 +1,108 @@
+#!/bin/sh
+
+opt_prefix='zfs-auto-snap'
+
+do_snapshots ()
+{
+	local KEEP=''
+
+	for ii in $TARGETS
+	do
+		zfs snapshot "$ii@$SNAPNAME"
+
+		KEEP="$opt_keep"
+
+		# ASSERT: The old snapshot list is sorted by increasing age.
+		for jj in $SNAPSHOTS_OLD
+		do
+			# Check whether this is an old snapshot of the filesystem.
+			if [ -z "${jj#$ii@$SNAPGLOB}" ]
+			then
+				KEEP=$(( $KEEP - 1 ))
+				if [ "$KEEP" -le '0' ]
+				then
+					zfs destroy -d "$jj"
+
+				fi
+			fi
+		done
+	done
+}
+
+
+# main ()
+# {
+
+while [ "$#" -gt '0' ]
+do
+	case "$1" in 
+		--keep)
+			if   [ ! "$2" -gt '0' ];
+			then
+				exit 1
+			fi
+			opt_keep="$2"
+			shift 2
+			;;
+		--label)
+			opt_label="$2"
+			shift 2
+			;;
+	esac
+done
+
+ZPOOL_STATUS=$(env LC_ALL=C zpool status 2>&1 )
+ZFS_LIST=$(env LC_ALL=C zfs list -t volume,filesystem -H)
+CANDIDATES=$(echo "$ZFS_LIST" | awk -F '\t' '{print $1}')
+SNAPSHOTS_OLD=$(env LC_ALL=C zfs list -H -t snapshot -S creation -o name) 
+
+# Get a list of pools that are being scrubbed.
+ZPOOLS_SCRUBBING=$(echo "$ZPOOL_STATUS" | awk -F ': ' \
+  '$1 ~ /^ *pool$/ { pool = $2 } ; \
+   $1 ~ /^ *scan$/ && $2 ~ /scrub in progress/ { print pool }' \
+  | sort ) 
+
+# Get a list of pools that cannot do a snapshot.
+ZPOOLS_NOTREADY=$(echo "$ZPOOL_STATUS" | awk -F ': ' \
+  '$1 ~ /^ *pool$/ { pool = $2 } ; \
+   $1 ~ /^ *state$/ && $2 !~ /ONLINE|DEGRADED/ { print pool } ' \
+  | sort)
+
+# Initialize the list of datasets that will get a recursive snapshot.
+TARGETS=''
+
+for ii in $CANDIDATES
+do
+	# Exclude datasets in pools that cannot do a snapshot.
+
+	for jj in $ZPOOLS_NOTREADY
+	do
+		if [ "$(echo "$ii" | awk -F/ '{print $1}')" = "$jj" ]
+		then
+			continue 2
+		fi
+	done
+	for jj in $ZPOOLS_SCRUBBING
+	do
+		if [ "$(echo "$ii" | awk -F/ '{print $1}')" = "$jj" ]
+		then
+			continue 2
+		fi
+	done
+
+	TARGETS="$TARGETS $ii"
+done
+
+# ISO style date; fifteen characters: YYYY-MM-DD-HH-MM
+DATE=$(date --utc +%F-%H-%M)
+
+# The snapshot name after the @ symbol.
+SNAPNAME="${opt_prefix}_${opt_label}_$DATE"
+
+# The expression for matching old snapshots.
+SNAPGLOB="${opt_prefix}_${opt_label}_????-??-??-??-??"
+
+do_snapshots "$SNAPNAME" "$SNAPGLOB" "$TARGETS"
+
+exit 0
+# }