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Add OpenStack provider `search-order` parameter 

Add the OpenStack provider `search-order` parameter which is used to
influence the retrieval of instance metadata.

See also:
  https://github.com/kubernetes/kubernetes/pull/52628
  https://github.com/kubernetes/kubernetes/issues/52378
pull/6434/head
Stephen Gordon 2017-11-22 14:51:03 -05:00 committed by Jared
parent e18e56832a
commit 4d15b60b5b
1 changed files with 22 additions and 0 deletions
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docs/concepts/cluster-administration/cloud-providers.md
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@ -213,6 +213,28 @@ provider configuration:
bs-version=v2 bs-version=v2
``` ```
#### Metadata
These configuration options for the OpenStack provider pertain to metadata and
should appear in the `[Metadata]` section of the `cloud.conf` file:
* `search-order` (Optional): This configuration key influences the way that the
provider retrieves metadata relating to the instance(s) in which it runs. The
default value of `configDrive,metadataService` results in the provider
retrieving metadata relating to the instance from the config drive first if
available and then the metadata service. Alternative values are:
* `configDrive` - Only retrieve instance metadata from the configuration
drive.
* `metadataService` - Only retrieve instance metadata from the metadata
service.
* `metadataService,configDrive` - Retrieve instance metadata from the metadata
service first if available, then the configuration drive.
Influencing this behavior may be desirable as the metadata on the
configuration drive may grow stale over time, whereas the metadata service
always provides the most up to date view. Not all OpenStack clouds provide
both configuration drive and metadata service though and only one or the other
may be available which is why the default is to check both.
#### Router #### Router
These configuration options for the OpenStack provider pertain to routing and These configuration options for the OpenStack provider pertain to routing and
should appear in the `[Route]` section of the `cloud.conf` file: should appear in the `[Route]` section of the `cloud.conf` file: