Enable tests for node volume attachment limits #303
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adamwg
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driver/driver_test.go
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| return nil, resp, errors.New("droplet was not found") | ||
| } | ||
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| if len(droplet.VolumeIDs) == maxVolumesPerNode { |
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Should we use >= maxVolumesPerNode here just to be safe?
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Yep, good call -- done.
The csi-test sanity package ships with off-by-default tests to validate per-node attachment limits. This change toggles the corresponding test configuration flag to enable the tests. The change requires modifying our fake driver to return a 422 HTTP error code when the limit is exceeded. As a consequence, we also need to customize the IdempotentCount test setting which parameterizes the 'should be idempotent' test that creates the given number of volumes in sequence. The default value of 10 causes our (fake) limit to be exceeded, which is why we tune it down to 5. The test also revealed that we missed to handle the case where the node volume attachment limit is exceed during ControllerPublishVolume. We extend our error handling to identify this case and return an RESOURCE_EXHAUSTED code accordingly.
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The csi-test sanity package ships with off-by-default tests to validate per-node attachment limits. This change toggles the corresponding test configuration flag to enable the tests.
The change requires modifying our fake driver to return a 422 HTTP error code when the limit is exceeded. As a consequence, we also need to customize the IdempotentCount test setting which parameterizes the 'should be idempotent' test that creates the given number of volumes in
sequence. The default value of 10 causes our (fake) limit to be exceeded, which is why we tune it down to 5.
The test also revealed that we missed to handle the case where the node volume attachment limit is exceed during
ControllerPublishVolume. We extend our error handling to identify this case and return anRESOURCE_EXHAUSTEDcode accordingly.The PR depends on #301.