After figuring out the SnapVault stuff, I needed to implement a whole bunch of SnapMirror relations. As I am lazy (as in click-lazy), I ended up writing a somewhat short Bash script, that’ll either establish a bunch of SnapMirror relations (for a single host) or just for a single volume.
The script expects, that SSH public key authentification has been set up, and that the source for the SnapMirror exists and is online/not-restricted.
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#!/bin/bash -f # Create a SnapMirror relation between two volumes # 1) create volume on target, if it doesn't exist # 2) set snapshot reserve on target # 3) start the snapmirror relationship KEY_FILE="/root/.ssh/netapp.dsa" SSH_OPTS="/root/.ssh/netapp-ssh_config" usage() { echo "Usage: fas-snapmirror-start.sh <MODE> <VOLUME|HOSTNAME> <SM_PRIMARY> <SM_SECONDARY> [SM_RATE_LIMIT]" echo "" if [ -n "$1" ] ; then echo "$1" echo "" fi echo "Required parameters:" echo "" echo " - MODE: Either host or volume (case sensitive)." echo "" echo " - VOLUME: Volume for which to configure SnapMirror (if mode is set to volume)" echo " - HOSTNAME: Host for which to configure SnapMirror (if mode is set to host)" echo " - SM_SECONDARY: Hostname of the SnapMirror Secondary" echo " - SM_PRIMARY: Hostname of the SnapMirror Primary" echo "" echo "Optional parameters:" echo "" echo " - SM_RATE_LIMIT: Limit the SnapMirror transfer to xx kb, may help on busy systems." echo " Defaults to no limit at all, may cause harm to already busy FAS" echo " controllers." echo "" exit 1 } ssh_fas() { # $@: commands for Data ONTAP COMMANDS="$@" /usr/bin/ssh -i $KEY_FILE -l root -F $SSH_OPTS $COMMANDS } snapmirror_setup() { if [ "$#" -lt 4 ] ; then break fi # $1: sm_secondary # $2: sm_primary # $4: volume # $6: sm_rate_limit sm_secondary=$1 sm_primary=$2 volume=$3 sm_rate_limit=$4 # Check if snapmirror access is configured correctly sm_secondary_ip="$( ssh_fas $sm_secondary rdfile /etc/hosts | grep $sm_secondary-e0a | awk '{ print $1 }' )" sm_access="$( ssh_fas $sm_primary options snapmirror.access | grep $sm_secondary_ip )" if [ -z "$sm_access" ] ; then echo "Please make sure, that SnapMirror access is correctly" echo "configured on $sm_primary, so that $sm_secondary" echo "can access it using snapmirror." echo echo "Hint: options snapmirror.access should look like this:" echo " options snapmirror.access host=$sm_secondary_ip" echo exit 1 fi # Get FlexVol size from SM_PRIMARY (SnapMirror destination has the same # size as the SnapMirror source) VOL_SIZE="$( ssh_fas $sm_primary vol size $volume | awk '{ print $8 }' | sed "s,.,," )" # Check if the is a qtree on SM_PRIMARY QTREE="$( ssh_fas $sm_primary qtree status | grep $volume | cut -d -f2 | sed '/^$/d' )" if [ -z "$QTREE" ] ; then echo echo "SnapDrive only supports Qtree to Qtree relations!" echo "Please create a qtree (qtree create /vol/${volume}/sv" echo exit 1 fi # Assume to always use aggr1 on SM_SECONDARY echo "SnapMirror operations for FlexVol: $volume" echo " - Creating FlexVol" ssh_fas $sm_secondary vol create $volume -s none aggr1 $VOL_SIZE &>/dev/null echo " - Disabling Unicode/atime/automatic snapshotting" ssh_fas $sm_secondary vol options $volume fractional_reserve 100 ssh_fas $sm_secondary vol options $volume no_atime_update on ssh_fas $sm_secondary vol options $volume create_ucode off ssh_fas $sm_secondary vol options $volume nosnap on ssh_fas $sm_secondary vol options $volume convert_ucode off ssh_fas $sm_secondary vol autosize $volume off &>/dev/null ssh_fas $sm_secondary snap reserve $volume $SNAP_RESERVE &>/dev/null echo " - Restricting volume on $sm_secondary" ssh_fas $sm_secondary vol restrict $volume &>/dev/null # Now create the SnapMirror relationship between SM_SECONDARY and SM_PRIMARY if [ -n $sm_rate_limit ] ; then smi_rate_limit="-k $sm_rate_limit" smc_rate_limit="kbs=$sm_rate_limit" else smc_rate_limit="-" fi echo " - Starting SnapMirror relation between $sm_secondary and $sm_primary" ssh_fas $sm_secondary snapmirror initialize $smi_rate_limit -S $sm_primary-e0a:$volume $sm_secondary:$volume &>/dev/null echo " - Updating snapmirror.conf on $sm_secondary" smc_opts="$sm_primary-e0a:$volume $sm_secondary:$volume $smc_rate_limit * 0-23/1 * *" ssh_fas $sm_secondary wrfile -a /etc/snapmirror.conf $smc_opts echo echo "You can monitor the SnapMirror initialization on the SnapMirror Secondary ($sm_secondary)" echo "by using the following command:" echo echo " 'snapmirror status $volume'" echo } # Main script starts here. #set -x if [ "$#" -lt 4 ] ; then usage fi case $1 in host) MODE="host"; HOST=$2 ;; volume) MODE="volume"; VOLUME=$2 ;; *) usage "Invalid mode specified" esac SM_PRIMARY=$3 SM_SECONDARY=$4 SM_RATE_LIMIT=${5:-10000} if [ "$MODE" == "host" ] ; then # Get the LUN list VOLUME_LIST="$( ssh_fas $SM_PRIMARY lun show | grep -i $HOST | grep -v windows_ | awk '{ print $1 }' | cut -d/ -f3 | sort -u | tr 'n' ' ' | sort -u )" for vol in $VOLUME_LIST; do # Check if snapreserve is enabled SNAP="$( ssh_fas $SM_PRIMARY snap reserve $vol | cut -d -f7 | sed "s,%,," )" if [ $SNAP -ne "0" ] ; then snapmirror_setup $SM_SECONDARY $SM_PRIMARY $vol $SM_RATE_LIMIT else echo "No snap reserve configured for $vol" fi done elif [ "$MODE" == "volume" ] ; then SNAP="$( ssh_fas $SM_PRIMARY snap reserve $VOLUME | cut -d -f7 | sed "s,%,," )" if [ $SNAP -ne "0" ] ; then snapmirror_setup $SM_SECONDARY $SM_PRIMARY $VOLUME $SM_RATE_LIMIT else echo "No snap reserve configured for $vol" fi fi #set -x |