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Percona Operator for MongoDB
Local storage support
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    • Welcome
      • System requirements
      • Design and architecture
      • Comparison with other solutions
      • Install with Helm
      • Install with kubectl
      • Install on Minikube
      • Install on Google Kubernetes Engine (GKE)
      • Install on Amazon Elastic Kubernetes Service (AWS EKS)
      • Install on Microsoft Azure Kubernetes Service (AKS)
      • Generic Kubernetes installation
      • Install on OpenShift
      • Application and system users
      • Changing MongoDB options
      • Anti-affinity and tolerations
      • Labels and annotations
      • Exposing the cluster
      • Local storage support
        • emptyDir
        • hostPath
      • Arbiter and non-voting nodes
      • MongoDB sharding
      • Transport encryption (TLS/SSL)
      • Data at rest encryption
      • Telemetry
        • About backups
        • Configure storage for backups
        • Making scheduled backups
        • Making on-demand backup
        • Storing operations logs for point-in-time recovery
        • Restore from a previously saved backup
        • Delete the unneeded backup
      • Upgrade MongoDB and the Operator
      • Horizontal and vertical scaling
      • Multi-cluster and multi-region deployment
      • Monitor with Percona Monitoring and Management (PMM)
      • Add sidecar containers
      • Restart or pause the cluster
      • Debug and troubleshoot
      • OpenLDAP integration
      • How to use private registry
      • Creating a private S3-compatible cloud for backups
      • Restore backup to a new Kubernetes-based environment
      • How to use backups to move the external database to Kubernetes
      • Install Percona Server for MongoDB in multi-namespace (cluster-wide) mode
      • Upgrading Percona Server for MongoDB manually
      • Custom Resource options
      • Percona certified images
      • Operator API
      • Frequently asked questions
      • Old releases (documentation archive)
      • Release notes index
      • Percona Operator for MongoDB 1.14.0 (2023-03-13)
      • Percona Operator for MongoDB 1.13.0 (2022-09-15)
      • Percona Operator for MongoDB 1.12.0 (2022-05-05)
      • Percona Distribution for MongoDB Operator 1.11.0 (2021-12-21)
      • Percona Distribution for MongoDB Operator 1.10.0 (2021-09-30)
      • Percona Distribution for MongoDB Operator 1.9.0 (2021-07-29)
      • Percona Kubernetes Operator for Percona Server for MongoDB 1.8.0 (2021-05-06)
      • Percona Kubernetes Operator for Percona Server for MongoDB 1.7.0 (2021-03-08)
      • Percona Kubernetes Operator for Percona Server for MongoDB 1.6.0 (2020-12-22)
      • Percona Kubernetes Operator for Percona Server for MongoDB 1.5.0 (2020-09-07)
      • Percona Kubernetes Operator for Percona Server for MongoDB 1.4.0 (2020-03-31)
      • Percona Kubernetes Operator for Percona Server for MongoDB 1.3.0 (2019-12-11)
      • Percona Kubernetes Operator for Percona Server for MongoDB 1.2.0 (2019-09-20)
      • Percona Kubernetes Operator for Percona Server for MongoDB 1.1.0 (2019-07-15)
      • Percona Kubernetes Operator for Percona Server for MongoDB 1.0.0 (2019-05-29)

    • emptyDir
    • hostPath

    Local Storage support for the Percona Operator for MongoDB¶

    Among the wide rage of volume types, supported by Kubernetes, there are two volume types which allow Pod containers to access part of the local filesystem on the node the emptyDir and hostPath.

    emptyDir¶

    A Pod emptyDir volume is created when the Pod is assigned to a Node. The volume is initially empty and is erased when the Pod is removed from the Node. The containers in the Pod can read and write the files in the emptyDir volume.

    The emptyDir options in the deploy/cr.yaml file can be used to turn the emptyDir volume on by setting the directory name.

    The emptyDir is useful when you use Percona Memory Engine.

    hostPath¶

    A hostPath volume mounts an existing file or directory from the host node’s filesystem into the Pod. If the pod is removed, the data persists in the host node’s filesystem.

    The volumeSpec.hostPath subsection in the deploy/cr.yaml file may include path and type keys to set the node’s filesystem object path and to specify whether it is a file, a directory, or something else (e.g. a socket):

    volumeSpec:
      hostPath:
        path: /data
        type: Directory
    

    Please note, you must created the hostPath manually and should have following attributes:

    • access permissions,
    • ownership,
    • SELinux security context.

    The hostPath volume is useful when you perform manual actions during the first run and require improved disk performance. Consider using the tolerations settings to avoid a cluster migration to different hardware in case of a reboot or a hardware failure.

    More details can be found in the official hostPath Kubernetes documentation.

    Contact Us

    For free technical help, visit the Percona Community Forum.

    To report bugs or submit feature requests, open a JIRA ticket.

    For paid support and managed or consulting services , contact Percona Sales.


    Last update: 2023-03-30
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