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snap-mgmt.sh
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snap-mgmt.sh
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#!/usr/bin/env bash
set -euo pipefail
if ! command -v jq >/dev/null 2>&1 ;then
echo "Please install jq"
exit 1
fi
export BLOCKBRIDGE_API_HOST=dogfood
export BLOCKBRIDGE_API_KEY="1/QuOVIdHIO...A"
export DAYS=3
export TAG="snapschedule"
export PREFIX="scheduled_"
DATE=$(date +"%H-%M-%S_%m-%d-%y")
export DATE
usage() { echo "Usage: $0 [-h <BLOCKBRIDGE_HOST>] [-a <AUTHORIZATION_TOKEN>] [-d <DAYS_TO_KEEP_SNAPSHOTS>] [-t <TAG>] [-p <PREFIX>]" 1>&2; exit 1; }
while getopts h:t:d:a:p flag
do
case "${flag}" in
h) BLOCKBRIDGE_API_HOST=${OPTARG-};;
a) BLOCKBRIDGE_API_KEY=${OPTARG-};;
d) DAYS=${OPTARG-};;
t) TAG=${OPTARG-};;
p) PREFIX=${OPTARG-};;
\?) usage ;;
:) usage ;;
*) usage ;;
esac
done
if [ -z "${BLOCKBRIDGE_API_HOST-}" ] || [ -z "${BLOCKBRIDGE_API_KEY-}" ] || [ -z "${DAYS-}" ]; then
usage
fi
#By using disk Tag option we can specify a group of disks to be snapshotted and avoid running an instance of script per disk
if [[ -n $TAG ]];then
#get all disks that are tagged
disk_list=$(bb disk list -R|jq -r '.[]|select(.tags[] == env.TAG)|.serial')
#if no disks are tagged - exit with error code
if [[ $disk_list == "" ]];then
echo "no disks found with tag: $TAG"
exit 1
else
#iterate through tagged disks
for disk in $disk_list;do
#check if the disk has existing snapshots that have specified prefix. By using prefix we avoid removing manually created snapshots
if ! snap_list=$(bb snapshot list --disk "$disk" -X label -X serial|grep -E "^$PREFIX");then snap_list="";fi
#check if number of prefixed snapshots is less than specified days
snap_count=( $snap_list )
snap_counter=${#snap_count[@]}
while [[ $snap_counter -ge $DAYS ]];do
#if its equal or more - find oldest snapshot and remove it
echo "There are $snap_counter snapshots, deleting oldest"
old_snap=$(bb snapshot list --disk "$disk" -R |jq -r '.|[.[]|select(.label|startswith(env.PREFIX))]|sort_by(.ctime)|first')
echo Removing snapshot $(echo $old_snap|jq '.label')
bb snapshot remove --snapshot $(echo $old_snap|jq -r '.serial')
((snap_counter=snap_counter-1))
done
#create new snapshot
bb snapshot create --disk "$disk" --label "$PREFIX""$DATE""_snapshot"
done
fi
fi