bookmark_borderKubernetes backup with Velero and Ceph

Velero is a tool that enables backup and restore Kubernetes cluster resources and persistent volumes. It simplifies the task of taking backups/restores, migrating resources to other clusters, and replication of clusters.

  • Stores Kubernetes resources in highly available object stores (S3, GCS, Blob Storage, etc.)
  • Backs up PVs / PVCs using cloud providers’ disk capture mechanism
  • Scheduling backups with a syntax cron
  • Rotation of automatic backups with TTL (Time to Live)
  • Supports community-enhanced plugins
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bookmark_borderKubernetes : Using Ceph RBD as Container Storage Interface (CSI)

Kubernetes Pods with persistent volumes are important for data persistence because containers are being created and destroyed, depending on the load and on the specifications of the developers. Pods and containers can self-heal and replicate. They are, in essence, ephemeral.

Before start this post I’ve been posted some hands on and conceptual docs to understand since the beginning this solution.

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bookmark_borderCeph : An overview

Ceph is open source, software-defined storage maintained by RedHat. It’s capable of block, object, and file storage. The clusters of Ceph are designed in order to run on any hardware with the help of an algorithm called CRUSH (Controlled Replication Under Scalable Hashing). This algorithm ensures that all the data is properly distributed across the cluster and data quickly without any constraints. Replication, Thin provisioning, Snapshots are the key features of the Ceph storage.

There are good reasons for using Ceph as IaaS and PaaS storage :

  • Scale your operations and move to market faster.
  • Bridge the gaps between application development and data science.
  • Gain deeper insights into your data.
  • File, block and Object storage in the same wrapper.
  • Better transfer speed and lower latency
  • Easily accessible storage that can quickly scal up or down .

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bookmark_borderCeph : Cluster deployment

In this post will be presented how to deploy the environment by ceph ansible.

An ansible deployment is the most standardized and official format among the main vendors using Ceph. Ex: Suse, Oracle and Redhat.

The installation presented in this document will use a similar flow for deploying:

If you would like to get an overview about Ceph these document could help you.

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