8a95e8a71c
The initial testing of DRAExtendedResource changed the common setup for all
tests so that each test runs with seven DeviceClasses. This is unnecessary and
confusing, for example when looking at the endpoint stats for the simple
conformance test ("Are the stats correct? The test should only create one
class.").
This update changes it so that each test which needs more than the default
class explicitly creates those itself. For clarity, the special -1 index gets a
name and naming of the DeviceClasses gets updated to keep the default class
simple (no additional suffix).
Using the same "example.com/resource0" in tests which run in parallel might
explain https://github.com/kubernetes/kubernetes/issues/133653. This gets
replaced with extended resource names based on the driver name, which is unique
in each parallel test.
Overview
The tests in this directory cover dynamic resource allocation support in Kubernetes. They do not test the correct behavior of arbitrary dynamic resource allocation drivers.
If such a driver is needed, then the in-tree test/e2e/dra/test-driver is used, with a slight twist: instead of deploying that driver directly in the cluster, the necessary sockets for interaction with kubelet (registration and dynamic resource allocation) get proxied into the e2e.test binary. This reuses the work done for CSI mock testing. The advantage is that no separate images are needed for the test driver and that the e2e test has full control over all gRPC calls, in case that it needs that for operations like error injection or checking calls.
Cluster setup preparation
The container runtime must support CDI. CRI-O supports CDI starting from release 1.23, Containerd supports CDI starting from release 1.7. To bring up a Kind cluster with Containerd, two things are needed:
NB: Kind switched to use worker-node base image with Containerd 1.7 by default starting from release 0.20, build kind from latest main branch sources or use Kind release binary 0.20 or later.
Build kind node image
After building Kubernetes, in Kubernetes source code tree build new node image:
$ kind build node-image --image dra/node:latest $(pwd)
Bring up a Kind cluster
$ kind create cluster --config test/e2e/dra/kind.yaml --image dra/node:latest
Run tests
- Build ginkgo
$ make ginkgo
- Run e2e tests for the
Dynamic Resource Allocationfeature:
$ KUBECONFIG=~/.kube/config _output/bin/ginkgo -p -v -focus=Feature:DynamicResourceAllocation ./test/e2e