added kvm tools and some simple scripts

1 files changed, 165 insertions, 0 deletions

diff --git a/kvm_tools/kvm_live_backup.sh b/kvm_tools/kvm_live_backup.sh
new file mode 100755
index 0000000..ddd3df7
--- /dev/null
+++ b/kvm_tools/kvm_live_backup.sh
@@ -0,0 +1,165 @@
+#!/bin/bash
+
+#####################################################################
+#
+# A FOOLISH KVM BACKUP SCRIPT 
+# hacked together by Miguel<m.i@gmx.at> around mid February 2018
+#
+# DO NOT FORGET TO SYNC & FSTRIM YOUR DISK BEFORE RUNNING THIS SHIT 
+# untar also needs -S !!!
+#
+# TODO: ADD TIMING INFO ?
+#
+# TODO: do not make so many assumptions about file names and locations :(
+#	This script should/could be much more universal!
+#	Do some BASIC error checking
+#	An RESTORE script would be very helpfull as well
+#
+# TODO!: check if we run inside tmux
+#	 ask if fstrim performed
+#	 check/ask for sudo
+#	 config external backup space
+#	 show config and ask if ok
+#	 override --all-yes with param
+#	 use dash instead bash
+#	 dry run
+#
+#####################################################################
+
+VERSION="0.1"
+
+# we exit as soon as a single command fails!
+set -e
+
+echo ""
+echo " 1) Are you running inside a tmux/screen?"
+echo " 2) Did you remember to perform sync & fstrim?"
+echo ""
+echo " Please type 'YES' if you want to continue."
+echo ""
+
+read proceed
+if [[ "$proceed" != "YES" ]]; then
+	exit
+fi
+
+# script expects exaclty one param (see config_example)
+if [ "$#" -ne 1 ]; then
+    echo "Usage: $0 [config_file]"
+    exit
+fi
+
+# color helpers (set on terminal only)
+black=
+red=
+green=
+yellow=
+blue=
+magenta=
+cyan=
+white=
+reset=
+if test -t 1; then
+black=`tput setaf 0`
+red=`tput setaf 1`
+green=`tput setaf 2`
+yellow=`tput setaf 3`
+blue=`tput setaf 4`
+magenta=`tput setaf 5`
+cyan=`tput setaf 6`
+white=`tput setaf 7`
+reset=`tput sgr0`
+fi
+
+# pretty printing funcs / vars
+
+cnt=0
+all=11
+
+function print_ok {
+	echo [${green}OK$reset]
+}
+function print_cnt {
+	printf "    [${cyan}%2s${reset}/${all}${reset}] " ${1}
+}
+function print_txt {
+   	((++cnt))
+        print_cnt $cnt
+	printf "%-30s  " "${1}..."
+}
+
+# let's do it
+echo
+echo "### ${magenta}FOOL LIVE KVM BACKUP ${VERSION}${reset} ###"
+echo
+echo "    Using config file:    ${yellow}${1}${reset}"
+echo
+source $1
+
+# some vars
+TIMESTAMP=`date +"%Y%m%d_%H%M%S"`
+LOG=${DOMAIN}_${TIMESTAMP}.log
+DOMAIN_T=${DOMAIN}_${TIMESTAMP}
+
+# tell what we gonna do
+echo "    Today we backup:      ${yellow}${DISK}$reset on ${yellow}${DOMAIN}${reset} as ${yellow}${USER}${reset}"
+echo "    SOURCE_DIR:           ${yellow}${SOURCE}$reset"
+echo "    TARGET_DIR:           ${yellow}${TARGET}$reset"
+echo "    LIMIT_RATE for tar:   ${yellow}${LIMIT_RATE}${reset}/second"
+echo "    Logging to:           ${yellow}${LOG}$reset"
+echo
+echo "    Keep your fingers crossed!"
+echo
+
+# chande into target dir
+cd $TARGET
+
+print_txt "LOG CURRENT DOMBLK LIST"
+sudo -u $USER virsh domblklist $DOMAIN > $LOG
+print_ok
+
+print_txt "DUMPING XML"
+sudo -u $USER virsh dumpxml $DOMAIN > $DOMAIN_T.xml
+sudo -u $USER virsh dumpxml $DOMAIN | sed "s:$SOURCE/${DOMAIN}.img:$SOURCE/${DOMAIN}.SNAP:" > ${DOMAIN_T}_snapped.xml
+print_ok
+
+print_txt "SAVING VM (RAM)"
+sudo -u $USER virsh save $DOMAIN $DOMAIN_T.ram >> $LOG
+print_ok
+
+print_txt "SNAPSHOTTING DISK"
+sudo -u $USER virsh snapshot-create-as $DOMAIN SNAP --disk-only --atomic --no-metadata --quiesce >> $LOG
+print_ok
+
+print_txt "RESTORING VM (RAM)"
+sudo -u $USER virsh restore $DOMAIN_T.ram --xml ${DOMAIN_T}_snapped.xml >> $LOG
+print_ok
+
+print_txt "LOG CURRENT DOMBLKLIST"
+sudo -u $USER virsh domblklist $DOMAIN >> $LOG
+print_ok
+
+print_txt "SAVING SNAPSHOT"
+sudo -u $USER tar -C ${SOURCE} -cSf - $DOMAIN.img 2>>$LOG | pv -L $LIMIT_RATE 2>/dev/null 1> $DOMAIN_T.img.tar 
+print_ok
+
+print_txt "BLOCK-COMMITTING DELTAS"
+sudo -u $USER virsh blockcommit $DOMAIN $DISK --pivot >> $LOG
+print_ok
+
+print_txt "REMOVING DELTAS"
+sudo -u $USER rm ${SOURCE}/$DOMAIN.SNAP >> $LOG
+print_ok
+
+print_txt "LOG CURRENT DOMBLKLIST"
+sudo -u $USER virsh domblklist $DOMAIN >> $LOG
+print_ok
+
+print_txt "LOG QCOW2 IMAGE INFO"
+sudo -u $USER qemu-img info ${SOURCE}/$DOMAIN.img  >> $LOG
+print_ok
+
+echo
+echo "### ${magenta}FINITO${reset} ###"
+echo
+