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56 lines
1.9 KiB
Plaintext
56 lines
1.9 KiB
Plaintext
// Module included in the following assemblies:
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//
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// * storage/understanding-persistent-storage.adoc
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//
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// This module should only be present in openshift-enterprise and
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// openshift-origin distributions.
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[id="block-volume-support_{context}"]
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= Block volume support
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{product-title} can statically provision raw block volumes. These volumes
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do not have a file system, and can provide performance benefits for
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applications that either write to the disk directly or implement their own
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storage service.
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Raw block volumes are provisioned by specifying `volumeMode: Block` in the
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PV and PVC specification.
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[IMPORTANT]
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====
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Pods using raw block volumes must be configured to allow privileged containers.
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====
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The following table displays which volume plug-ins support block volumes.
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.Block volume support
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[cols="1,1,1,1", width="100%",options="header"]
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|===
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|Volume Plug-in |Manually provisioned |Dynamically provisioned |Fully supported
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|AWS EBS | ✅ | ✅ | ✅
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|Azure Disk | ✅ | ✅ | ✅
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|Azure File | | |
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|Cinder | ✅ | ✅ |
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|Fibre Channel | ✅ | |
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|GCP | ✅ | ✅ | ✅
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|HostPath | | |
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|iSCSI | ✅ | | ✅
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|Local volume | ✅ || ✅
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|NFS | | |
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|Red Hat OpenShift Container Storage | ✅ | ✅ | ✅
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|VMware vSphere | ✅ | ✅ | ✅
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|===
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[NOTE]
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====
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Any of the block volumes that can be provisioned manually, but are not provided
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as fully supported, are included as a Technology Preview feature only. Technology
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Preview features are not supported with Red Hat production service level
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agreements (SLAs) and might not be functionally complete. Red Hat does not
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recommend using them in production. These features provide early access to
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upcoming product features, enabling customers to test functionality and provide
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feedback during the development process. For more information about the
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support scope of Red Hat Technology Preview
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features, see https://access.redhat.com/support/offerings/techpreview/.
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====
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