kube-efs-backup

Kubernetes Docker container to backup EFS to S3 on schedule.

about the container

We like running Kubernetes with EFS, but we wanted a nice way to maintain backups of the file system.

This Docker container is designed to run as a simple CronJob / ScheduledJob within Kubernetes, to allow us to backup EFS to S3 on schedule.

You can set the backup schedule within the Kubernetes yaml; the only things you need to pass to the Docker container are the source directory (the EFS point) and the S3 bucket in which to copy it to.

Ideally, pass S3 bucket write access in via IAM role on the ec2 instance. Use lifecycle policies on the S3 bucket for a nice, reliable way to manage backup retention.

usage in Docker

• required pass in your EFS volume to the container
• required specify that volume as the SOURCE_DIR env variable
• required set S3_DIR env variable to the S3 bucket name for backups

usage in Kubernetes

see the scheduledjob.yaml on how to deploy container to Kubernetes:

• required update the NFS server to match the EFS id/region for your account
• required update the S3_DIR env variable to the S3 bucket name for backups

to-do / wishlist

• Generate some kind of metrics when complete (time taken, files copied?), which can be pushed to Prometheus for monitoring/alerting on backup status.