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Only layering RBD image format 2 feature should be supported for now.

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Yecheng Fu
2017-06-16 16:29:58 +00:00
parent 0c7cdf773b
commit 4e5e9ca0cd
4 changed files with 18 additions and 7 deletions
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4
examples/persistent-volume-provisioning/README.md
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@@ -220,9 +220,9 @@ parameters:
* `userId`: Ceph client ID that is used to map the RBD image. Default is the same as `adminId`.
* `userSecretName`: The name of Ceph Secret for `userId` to map RBD image. It must exist in the same namespace as PVCs. It is required.
* `imageFormat`: Ceph RBD image format, "1" or "2". Default is "1".
* `imageFeatures`: Ceph RBD image format 2 features, comma delimited. This is optional, and only be used if you set `imageFormat` to "2". For a complete list of available image features, please refer to [RBD docs](http://docs.ceph.com/docs/master/man/8/rbd/). By default, all features (except for striping) will be enabled.
* `imageFeatures`: Ceph RBD image format 2 features, comma delimited. This is optional, and only be used if you set `imageFormat` to "2". Currently supported features are `layering` only. Default is "", no features is turned on.
NOTE: If you want to use RBD image format 2, you may need to disable some image features, because some of them are not supported by [Ceph kernel module](https://github.com/ceph/ceph-client). For example, only "layering" feature is supported on Linux 4.9 LTS version, so you need to specify `imageFeatures` to "layering", if set `imageFormat` to "2".
NOTE: We cannot turn on `exclusive-lock` feature for now (and `object-map`, `fast-diff`, `journaling` which require `exclusive-lock`), because exclusive lock and advisory lock cannot work together. (See [#45805](https://issue.k8s.io/45805))
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