How to organize synchronization and backup of a local Kubernetes cluster configuration using Velero and GitOps tools?

Managing the state of a Kubernetes cluster requires a comprehensive approach to backup, as standard file system backup methods do not work here. For full preservation of cluster resources, persistent volumes, and configurations, a specialized tool called Velero is used, which integrates with object storage.

Velero installation starts with deploying the management client on the local machine and installing the server side into the Kubernetes cluster itself. During installation, you need to specify the plugin to work with your cloud provider or S3-compatible storage, as well as pass the credentials file for bucket access. Once the installation is complete, the Velero server is ready to create disk snapshots and resource manifests.

To create a backup of all cluster resources, the velero backup create command is used. You can configure automatic backup creation on a schedule using Velero's built-in scheduler mechanism, which accepts standard cron expressions. This allows you to regularly save the current state of the cluster without administrator intervention.

To restore infrastructure in case of a failure, the velero restore create command is applied, specifying the name of the specific backup. In addition, to manage declarative application manifests, it is strongly recommended to use GitOps approaches, storing all infrastructure in Git repositories and synchronizing changes through tools like ArgoCD or Flux.