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Container(Runtime) Performance Container(Runtime)

CRI performance benchmarking provides a benchmarking framework for CRI-compatible container runtimes. This allows the CRI runtime developers to benchmark the performance of their runtime without needing to set up Kubernetes components or run Kubernetes benchmark tests.


The benchmarking tests binary critest can be downloaded from Releasing page ⟨⟩:

sudo tar zxvf critest-$VERSION-linux-amd64.tar.gz -C /usr/local/bin
rm -f critest-$VERSION-linux-amd64.tar.gz

For v1.0.0-alpha.0 and previous versions, Go and cri-tools source code are also required to run critest. The source code could get by running

# Replace branch name from version matrix in
git clone -b release-1.9 $GOPATH/src/

Running tests


Before running the test, you need to ensure that the CRI server under test is running and listening on a Unix socket or a Windows tcp socket. Because the benchmark tests are designed to request changes (e.g., create/delete) to the containers and verify that correct status is reported, it expects to be the only user of the CRI server. Please make sure that 1) there are no existing CRI-managed containers running on the node, and 2) no other processes (e.g., Kubelet) will interfere with the tests.


critest -benchmark

This will

  • Connect to the shim of CRI container runtime
  • Run the benchmark tests using ginkgo
  • Output the test results to STDOUT

critest connects to Unix: unix:///var/run/dockershim.sock or Windows: tcp://localhost:3735 by default. For other runtimes, the endpoint can be set by flags --runtime-endpoint and --image-endpoint.

Additional options

  • -ginkgo.focus: Only run the tests that match the regular expression.
  • -image-endpoint: Set the endpoint of image service. Same with runtime-endpoint if not specified.
  • -runtime-endpoint: Set the endpoint of runtime service. Default to Unix: unix:///var/run/dockershim.sock or Windows: tcp://localhost:3735.
  • -ginkgo.skip: Skip the tests that match the regular expression.
  • -h: Should help and all supported options.

Interface (CRI)