From 1730956734932d49e6183717d7a4e080650e12f3 Mon Sep 17 00:00:00 2001
From: Someone <someone@somenet.org>
Date: Fri, 18 Jan 2013 05:48:52 +0100
Subject: [PATCH] moved btrfs scripts out of overall script dir

---
 cleaner.sh  | 99 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 snapshot.sh | 35 +++++++++++++++++++
 2 files changed, 134 insertions(+)
 create mode 100755 cleaner.sh
 create mode 100755 snapshot.sh

diff --git a/cleaner.sh b/cleaner.sh
new file mode 100755
index 0000000..f040eb2
--- /dev/null
+++ b/cleaner.sh
@@ -0,0 +1,99 @@
+#!/bin/bash
+# 
+# Clean old BTRFS snapshots
+# */15 * * * * /root/somescripts/btrfs/cleanup.sh &> /dev/null
+#
+# This script will keep current/last day/month snapshots.
+# This script will update current/last_day/week/month snapshots and will delete snapshots if needed (too many or low on space)
+# 
+#set volumes to do curr/last day/month for.
+LASTLIST="root home rw"
+
+
+#TODO: change autoclean behaviour from auto_* to *.snap
+# Autosnaps to keep. Counting/Considering *.snap only. There should be adate_*.snap snapshots only.
+let MINSNAPCNT=3*5
+let MAXSNAPCNT=3*300
+MAXSPACEPERCENT=85
+
+if [ -e /tmp/btrfs_cleaner.lock ]; then
+  echo "Lockfile found. Assuming another instance is running. exitting."
+  exit 1
+fi
+
+touch /tmp/btrfs_cleaner.lock
+mount /mnt/btrfs &> /dev/null
+cd /mnt/btrfs
+
+# Keep current and last MONTH
+for vol in $LASTLIST; do
+  CHECK=$(grep "`date +"%Y-%m-"`" amon_curr_${vol}.txt 2> /dev/null)
+  if [ "$CHECK" == "" ]; then
+    echo "Autosnap cleaner: Rotating last and current month for ${vol}"
+    if [ -e "amon_curr_${vol}.snp" -a -e "amon_curr_${vol}.txt" ]; then
+      if [ -e "amon_last_${vol}.snp" -a -e "amon_last_${vol}.txt" ]; then
+        mv "amon_last_${vol}.snp" "`cat amon_last_${vol}.txt`"
+      fi
+      mv "amon_curr_${vol}.snp" "amon_last_${vol}.snp"
+      mv "amon_curr_${vol}.txt" "amon_last_${vol}.txt"
+    fi
+    CANDIDATE=$(find . -maxdepth 1 -name 'aadate_'`date +"%Y-%m-"`'*_'${vol}'.snap' | sort | head -n 1)
+    if [ "$CANDIDATE" != "" ]; then
+      echo $CANDIDATE > amon_curr_${vol}.txt
+      mv $CANDIDATE amon_curr_${vol}.snp
+    fi
+  fi
+done
+
+# Keep current and last DAY
+for vol in $LASTLIST; do
+  CHECK=$(grep "`date +"%Y-%m-%d"`" aday_curr_${vol}.txt 2> /dev/null)
+  if [ "$CHECK" == "" ]; then
+    echo "Autosnap cleaner: Rotating last and current day for ${vol}"
+    if [ -e "aday_curr_${vol}.snp" -a -e "aday_curr_${vol}.txt" ]; then
+      if [ -e "aday_last_${vol}.snp" -a -e "aday_last_${vol}.txt" ]; then
+        mv "aday_last_${vol}.snp" "`cat aday_last_${vol}.txt`"
+      fi
+      mv "aday_curr_${vol}.snp" "aday_last_${vol}.snp"
+      mv "aday_curr_${vol}.txt" "aday_last_${vol}.txt"
+    fi
+    CANDIDATE=$(find . -maxdepth 1 -name 'aadate_'`date +"%Y-%m-%d"`'*_'${vol}'.snap' | sort | head -n 1)
+    if [ "$CANDIDATE" != "" ]; then
+      echo $CANDIDATE > aday_curr_${vol}.txt
+      mv $CANDIDATE aday_curr_${vol}.snp
+    fi
+  fi
+done
+
+
+# CLEAN *.snap if needed (too many or low on space)
+LOOPDEL=2
+while [ $LOOPDEL -eq 2 ]; do
+  LOOPDEL=1
+
+  btrfs fi show inthdd &> /tmp/btrfs_fishow.txt
+  SPACESIZE="`grep 'size' /tmp/btrfs_fishow.txt | sed -E 's~^.*?size ([0-9]+\.[0-9]*)GB .*?$~\1~g'`"
+  SPACEUSED="`grep 'bytes used' /tmp/btrfs_fishow.txt | sed -E 's~^.*?bytes used ([0-9]+\.[0-9]*)GB.*?$~\1~g'`"
+  SPACEALLOC="`grep 'size' /tmp/btrfs_fishow.txt | sed -E 's~^.*?GB used ([0-9]+\.[0-9]*)GB.*?$~\1~g'`"
+  rm /tmp/btrfs_fishow.txt
+
+  SNAPCNT="`find . -maxdepth 1 -name 'auto_*' -o -name '*.snap' | wc -l`"
+  SPACEPERCENT="`python -c 'print int(100.0*'${SPACEUSED}'/'${SPACESIZE}')'`"
+
+  echo "Autosnap cleaner: Snap count min/curr/limit [${MINSNAPCNT}/${SNAPCNT}/${MAXSNAPCNT}]."
+  echo "Autosnap cleaner: Space used/alloc/size/limit [${SPACEUSED}/${SPACEALLOC}/${SPACESIZE}][${SPACEPERCENT}%/${MAXSPACEPERCENT}%]"
+
+  if [ $SNAPCNT -gt $MAXSNAPCNT -o $SPACEPERCENT -gt $MAXSPACEPERCENT ]; then
+    DELFILE="`find . -maxdepth 1 -name 'auto_*' | sort | head -n -${MINSNAPCNT} | head -n 1`"
+    if [ $SNAPCNT -gt $MINSNAPCNT -a "$DELFILE" != "" ]; then
+      btrfs subvolume delete "${DELFILE}" && LOOPDEL=2
+    fi
+  fi
+  if [ $LOOPDEL -eq 2 ]; then
+    sleep 60
+  fi
+done
+
+umount /mnt/btrfs &> /dev/null
+rm -rf /tmp/btrfs_cleaner.lock
+
diff --git a/snapshot.sh b/snapshot.sh
new file mode 100755
index 0000000..d675e72
--- /dev/null
+++ b/snapshot.sh
@@ -0,0 +1,35 @@
+#!/bin/bash
+#
+# take BTRFS snapshots
+# 0 * * * * /root/somescripts/btrfs/snapshot.sh &> /dev/null
+# This script will generate: current_$vol.snp/.txt + last_$vol.snp/.txt and date_$date_$vol.snp/.txt
+#
+# Set volumes to autosnap
+SNAPLIST="root home rw"
+
+# Timestamp of creation.
+STARTTS="`date +'%Y-%m-%d--%H-%M'`"
+CALLPATH="`pwd`"
+
+mount /mnt/btrfs &> /dev/null
+cd /mnt/btrfs
+
+for vol in $SNAPLIST; do
+  if [ -e "ahour_curr_${vol}.snp" -a -e "ahour_curr_${vol}.txt" ]; then
+    if [ -e "ahour_last_${vol}.snp" -a -e "ahour_last_${vol}.txt" ]; then
+      echo "Autosnap: Moving ahour_last_${vol}.snp to: `cat ahour_last_${vol}.txt`"
+      mv "ahour_last_${vol}.snp" "`cat ahour_last_${vol}.txt`"
+    fi
+    echo "Autosnap: Moving ahour_curr_${vol}.snp to: ahour_last_${vol}.snp"
+    mv "ahour_curr_${vol}.snp" "ahour_last_${vol}.snp"
+    mv "ahour_curr_${vol}.txt" "ahour_last_${vol}.txt"
+  fi
+  echo "Autosnap: Snapshotting ahour_curr_${vol}.snp (${STARTTS})"
+  echo "aadate_${STARTTS}_${vol}.snap" > ahour_curr_${vol}.txt
+  btrfs subvolume snapshot "${vol}" "ahour_curr_${vol}.snp"
+  touch -m -a "ahour_curr_${vol}.snp"
+done
+
+cd $CALLPATH
+umount /mnt/btrfs &> /dev/null || echo "Failed to unmount"
+
-- 
2.43.0