Scripts to manage AKS Disk snapshots

deleteOldSnapshots.sh

# set the expiry to a month ago
expirydate=$(date -d'-1 month' +%s)

# I can use az -o table with cut -d driectly
for snapshot in $(az snapshot list -g $resourceGroup | jq -r '.[] | [.id, .timeCreated[:10], .name] | join("#")')
do
    snapshotId=$(echo $snapshot | cut -f1 -d "#")
    snapshotDate=$(echo $snapshot | cut -f2 -d "#" | xargs -I{} date -d {} +%s)
    snapshotName=$(echo $snapshot | cut -f3 -d "#")
    
    if [ $snapshotDate -le $expirydate ];
    then
        echo "Deleting snapshot ${snapshotName}"
        az snapshot delete --ids $snapshotId
    else
        echo "Keeping snapshot ${snapshotName}"
    fi
done

snapshotPersistentVolumesOnAKS.sh

# get all the persistent volume from the current k8s context
echo "Getting the list of all persistent volumes.."
for persistentVolume in $(kubectl get pv --all-namespaces -o=jsonpath='{range .items[*]}{.spec.azureDisk.diskURI}{"#"}{.metadata.name}{"\n"}')
do
    # azure id of the disk
    diskId=$(echo $persistentVolume | cut -f1 -d "#")

    # name of the persistent volume
    pvName=$(echo $persistentVolume | cut -f2 -d "#")

    # target resource group for the snapshot
    targetResourceGroup=$(az disk show --ids $diskId | jq -r '.resourceGroup')

    # figure out the backup name
    backupDate=$(date -dmonday +%Y%m%d)

    # new backups every monday and then incremental
    backupName="${pvName}_backup_${backupDate}"

    # take the snapshot
    echo "Taking a snapshot of $diskId on $targetResourceGroup as $backupName"
    az snapshot create -g $targetResourceGroup --source $diskId --name $backupName --incremental true | jq
done