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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:
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 offTo 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"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
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