Add script to snapshot only running instances disks

google-cloud-auto-snapshot-running-instances.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+if [ -z "${DAYS_RETENTION}" ]; then
+  # Default to 60 days
+  DAYS_RETENTION=60
+fi
+
+# loop through all disks of running instances within this project and create a snapshot
+gcloud compute instances list --filter="STATUS:RUNNING" --format='value(name)'| while read -r INSTANCE_NAME; do
+  gcloud compute disks list --filter="NAME:${INSTANCE_NAME}" --format='value(name,zone)'| while read -r DISK_NAME ZONE; do
+    gcloud compute disks snapshot "${DISK_NAME}" --snapshot-names autogcs-"${DISK_NAME:0:31}"-"$(date '+%Y-%m-%d-%s')" --zone "${ZONE}"
+  done
+done
+#
+# snapshots are incremental and dont need to be deleted, deleting snapshots will merge snapshots, so deleting doesn't loose anything
+# having too many snapshots is unwiedly so this script deletes them after n days
+#
+if [[ $(uname) == "Linux" ]]; then
+  from_date=$(date -d "-${DAYS_RETENTION} days" "+%Y-%m-%d")
+else
+  from_date=$(date -v -${DAYS_RETENTION}d "+%Y-%m-%d")
+fi
+gcloud compute snapshots list --filter="creationTimestamp<${from_date} AND name~'autogcs.*'" --uri | while read -r SNAPSHOT_URI; do
+   gcloud compute snapshots delete "${SNAPSHOT_URI}" --quiet
+done
+#