Merge branch 'multi-servers-fallback' of evolix/evobackup into master
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Gitea
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zzz_evobackup
129
zzz_evobackup
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@ -2,7 +2,7 @@
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#
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# Script Evobackup client
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# See https://gitea.evolix.org/evolix/evobackup
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#
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#
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# Author: Gregory Colpart <reg@evolix.fr>
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# Contributors:
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# Romain Dessort <rdessort@evolix.fr>
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@ -13,14 +13,26 @@
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#
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# Licence: AGPLv3
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#
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# The following variables must be changed:
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# SSH_PORT: The Port used for the ssh(1) jail on the backup server
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# MAIL: The email address to send notifications to.
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# SRV: The hostname or IP address of the backup server.
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#
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# You must then uncomment the various
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# examples that best suit your case
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#
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# /!\ DON'T FORGET TO SET "MAIL" and "SERVERS" VARIABLES
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##### Configuration ###################################################
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# email adress for notifications
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MAIL=jdoe@example.com
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# list of hosts (hostname or IP) and SSH port for Rsync
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SERVERS="node0.backup.example.com:2XXX node1.backup.example.com:2XXX"
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# timeout (in seconds) for the SSH test
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SSH_CONNECT_TIMEOUT=30
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# You can set "linux" or "bsd" manually or let it choose automatically
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SYSTEM=$(uname | tr '[:upper:]' '[:lower:]')
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##### SETUP AND FUNCTIONS #############################################
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# shellcheck disable=SC2174
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mkdir -p -m 700 /home/backup
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PATH=/sbin:/usr/sbin:/bin:/usr/bin:/usr/local/sbin:/usr/local/bin
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@ -31,6 +43,50 @@ export LANG=C
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## Force umask
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umask 077
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# Call test_server with "HOST:PORT" string
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# It will return with 0 if the server is reachable.
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# It will return with 1 and a message on stderr if not.
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test_server() {
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item=$1
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# split HOST and PORT from the input string
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host=$(echo "${item}" | cut -d':' -f1)
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port=$(echo "${item}" | cut -d':' -f2)
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# Test if the server is accepting connections
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ssh -q -o "ConnectTimeout ${SSH_CONNECT_TIMEOUT}" "${host}" -p "${port}" -t "exit"
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# shellcheck disable=SC2181
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if [ $? = 0 ]; then
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# SSH connection is OK
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return 0
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else
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# SSH connection failed
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echo "Failed to connect to \`${item}' within ${SSH_CONNECT_TIMEOUT} seconds" >&2
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return 1
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fi
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}
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# Call pick_server with an optional positive integer to get the nth server in the list.
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pick_server() {
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increment=${1:-0}
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list_length=$(echo "${SERVERS}" | wc -w)
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if [ "${increment}" -ge "${list_length}" ]; then
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# We've reached the end of the list
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echo "No more server available" >&2
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return 1
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fi
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# A salt is useful to randomize the starting point in the list
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# but stay identical each time it's called for a server (based on hostname).
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salt=$(hostname | cksum | cut -d' ' -f1)
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# Pick an integer between 0 and the length of the SERVERS list
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# It changes each day
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item=$(( ($(date +%d) + salt + increment) % list_length ))
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# cut starts counting fields at 1, not 0.
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field=$(( item + 1 ))
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echo "${SERVERS}" | cut -d' ' -f${field}
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}
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## Verify other evobackup process and kill if needed
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PIDFILE=/var/run/evobackup.pid
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if [ -e $PIDFILE ]; then
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@ -41,28 +97,15 @@ if [ -e $PIDFILE ]; then
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done
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# Then kill the main PID.
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kill -9 "$pid"
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echo "$0 tourne encore (PID $pid). Processus killé" >&2
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echo "$0 is still running (PID $pid). Process has been killed" >&2
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fi
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echo "$$" > $PIDFILE
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# shellcheck disable=SC2064
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trap "rm -f $PIDFILE" EXIT
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# port SSH
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SSH_PORT=2XXX
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##### LOCAL BACKUP ####################################################
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# email adress for notifications
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MAIL=jdoe@example.com
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# choose "linux" or "bsd"
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SYSTEM=$(uname | tr '[:upper:]' '[:lower:]')
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# Variable to choose different backup server with date
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NODE=$(($(date +%e) % 2))
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# serveur address for rsync
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SRV="node$NODE.backup.example.com"
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## We use /home/backup : feel free to use your own dir
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mkdir -p -m 700 /home/backup
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# You can comment or uncomment sections below to customize the backup
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## OpenLDAP : example with slapcat
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# slapcat -l /home/backup/ldap.bak
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@ -164,9 +207,9 @@ mkdir -p -m 700 /home/backup
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## Dump MBR / table partitions with dd and sfdisk
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## Linux
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#for disk in $(ls /dev/[sv]d[a-z] 2>/dev/null); do
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# name=$(basename $disk)
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# dd if=$disk of=/home/backup/MBR-$name bs=512 count=1 2>&1 | egrep -v "(records in|records out|512 bytes)"
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# fdisk -l $disk > /home/backup/partitions-$name
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# name=$(basename $disk)
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# dd if=$disk of=/home/backup/MBR-$name bs=512 count=1 2>&1 | egrep -v "(records in|records out|512 bytes)"
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# fdisk -l $disk > /home/backup/partitions-$name
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#done
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#cat /home/backup/partitions-* > /home/backup/partitions
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## OpenBSD
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@ -203,6 +246,25 @@ else
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pkg_info -m >/home/backup/packages
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fi
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##### REMOTE BACKUP ###################################################
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n=0
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server=""
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while :; do
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server=$(pick_server "${n}")
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test $? = 0 || exit 2
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if test_server "${server}"; then
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break
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else
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server=""
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n=$(( n + 1 ))
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fi
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done
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SSH_SERVER=$(echo "${server}" | cut -d':' -f1)
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SSH_PORT=$(echo "${server}" | cut -d':' -f2)
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HOSTNAME=$(hostname)
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BEGINNING=$(/bin/date +"%d-%m-%Y ; %H:%M")
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rep="/bsd /bin /sbin /usr"
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fi
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# /!\ DO NOT USE COMMENTS in the rsync command /!\
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# It breaks the command and destroys data, simply remove (or add) lines.
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rsync -avzh --stats --delete --delete-excluded --force --ignore-errors --partial \
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--exclude "lost+found" \
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--exclude ".nfs.*" \
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@ -250,12 +315,14 @@ rsync -avzh --stats --delete --delete-excluded --force --ignore-errors --partial
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/home \
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/srv \
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-e "ssh -p $SSH_PORT" \
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"root@$SRV:/var/backup/" \
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"root@$SSH_SERVER:/var/backup/" \
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| tail -30 >> /var/log/evobackup.log
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END=$(/bin/date +"%d-%m-%Y ; %H:%M")
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echo "EvoBackup - $HOSTNAME - START $BEGINNING" \
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##### REPORTING #######################################################
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echo "EvoBackup - $HOSTNAME - START $BEGINNING" \
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>> /var/log/evobackup.log
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echo "EvoBackup - $HOSTNAME - STOP $END" \
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