Chapter 11. Setting up Custom Volume Options

To set up shared persistent volumes, execute the following commands in one of the Red Hat Openshift Container Storage pod:

  1. For static provisioning: Execute the following commands to set the volume options: 

    # gluster volume set VOLUME performance.open-behind off
# gluster volume set VOLUME performance.write-behind off
# gluster volume set VOLUME performance.stat-prefetch off
# gluster volume set VOLUME  performance.quick-read off
# gluster volume set VOLUME performance.strict-o-direct on
# gluster volume set VOLUME  performance.read-ahead off
# gluster volume set VOLUME performance.io-cache off
# gluster volume set VOLUME performance.readdir-ahead off

  2. To verify, execute the following command: 

    # gluster volume get VOLUME all  | grep <performance translator>

    For example: 

    # gluster volume get VOLUME all  | egrep "performance.stat-prefetch | performance.write-behind | performance.open-behind | performance.quick-read | performance.strict-o-direct | performance.read-ahead | performance.io-cache | performance.readdir-ahead"

  3. For dynamic provisioning, the volume options can be listed under "parameter" in the storage class file. For example: 

    parameters:
  resturl: http://heketi-storage-glusterfs.router.default.svc.cluster.local
  restuser: admin
  secretName: heketi-storage-admin-secret
  secretNamespace: glusterfs
  volumeoptions: performance.stat-prefetch off performance.write-behind off performance.open-behind off performance.quick-read off performance.strict-o-direct on performance.read-ahead off performance.io-cache off performance.readdir-ahead off

For more information on registering a storage class for file storage see https://access.redhat.com/documentation/en-us/red_hat_openshift_container_storage/3.11/html-single/operations_guide/#chap-Documentation-Red_Hat_Gluster_Storage_Container_Native_with_OpenShift_Platform-OpenShift_Creating_Persistent_Volumes-Dynamic_Prov

For more information on registering a storage class for block storage see https://access.redhat.com/documentation/en-us/red_hat_openshift_container_storage/3.11/html-single/operations_guide/#Block_dynamic_prov_vol