cronjob backup all disks for Google Cloud Instances

make_my_disks_snapshots.sh

#!/bin/sh

# 1) crontab -l:   15 1 * * * /root/make_my_disks_snapshots.sh
# 2) Add service account snapshots-rw@[project-id].iam.gserviceaccount.com with Compute Storage Admin role attached
# 3) Set this account to instance


S_DATE=`date +"%Y%m%d-%H%M%S"`
S_NAME=`hostname`
ZONE=`curl -s -m 10 "http://metadata.google.internal/computeMetadata/v1/instance/zone" -H "Metadata-Flavor: Google" | grep -Po '[^/]+$'`


for OUTPUT in $(curl -s -m 10 "http://metadata.google.internal/computeMetadata/v1/instance/disks/" -H "Metadata-Flavor: Google")
do
	S_DISK_NAME=`curl -s -m 10 "http://metadata.google.internal/computeMetadata/v1/instance/disks/${OUTPUT}device-name" -H "Metadata-Flavor: Google"`
	S_FULL_NAME="${S_DISK_NAME}-${S_DATE}"
	echo "Snapshoting: ${S_FULL_NAME}"
	gcloud compute disks snapshot $S_DISK_NAME --snapshot-names $S_FULL_NAME --zone $ZONE

done