external

When a test suite like test/e2e/e2e.test from Kubernetes includes this package, the -storage.testdriver parameter can be used one or more times to enabling testing of a certain pre-installed storage driver.

The parameter takes as argument the name of a .yaml or .json file. The filename can be absolute or relative to --repo-root. The content of the file is used to populate a struct that defines how to test the driver. For a full definition of the content see:

• struct driverDefinition in external.go
• struct TestDriver and the Cap capability constants in testdriver.go

Here is a minimal example for the CSI hostpath driver:

StorageClass:
  FromName: true
SnapshotClass:
  FromName: true
DriverInfo:
  Name: hostpath.csi.k8s.io
  Capabilities:
    persistence: true

The prow.sh script of the different CSI hostpath driver releases generates the actual definition that is used during CI testing, for example in v1.2.0.

Currently there is no checking for unknown fields, i.e. only file entries that match with struct entries are used and other entries are silently ignored, so beware of typos.

For each driver, the storage tests from test/e2e/storage/testsuites are added for that driver with External Storage [Driver: <Name>] as prefix.

To run just those tests for the example above, put that content into /tmp/hostpath-testdriver.yaml, ensure e2e.test is in your PATH or current directory (downloaded from a test tarball like https://dl.k8s.io/release/v1.14.0/kubernetes-test-linux-amd64.tar.gz or built via make WHAT=test/e2e/e2e.test), and invoke:

ginkgo -p -focus='External.Storage.*hostpath.csi.k8s.io' \
       -skip='\[Feature:|\[Disruptive\]' \
       e2e.test \
       -- \
       -storage.testdriver=/tmp/hostpath-testdriver.yaml

This disables tests which depend on optional features. Those tests must be run by selecting them explicitly in an environment that supports them, for example snapshotting:

ginkgo -p -focus='External.Storage.*hostpath.csi.k8s.io.*\[Feature:VolumeSnapshotDataSource\]' \
       -skip='\[Disruptive\]' \
       e2e.test \
       -- \
       -storage.testdriver=/tmp/hostpath-testdriver.yaml