ci-kubernetes-e2e-gci-gce-examples: broken test run
Problem
https://k8s-gubernator.appspot.com/build/kubernetes-jenkins/logs/ci-kubernetes-e2e-gci-gce-examples/3599/ Multiple broken tests: Failed: [k8s.io] [Feature:Example] [k8s.io] Hazelcast should create and scale hazelcast {Kubernetes e2e suite} [code block] Issues about this test specifically: #27850 #30672 #33271 Failed: [k8s.io] [Feature:Example] [k8s.io] CassandraStatefulSet should create statefulset {Kubernetes e2e suite} [code block] Issues about this test specifically: #36323 #36469 #38222 Failed: Test {e2e.go} [code block] Issues about this test specifically: #33361 #38663 #39788 #39877 #40371 #40469 #40478 #40483 #40668 #41048 #43025 Failed: [k8s.io] [Feature:Example] [k8s.io] Cassandra should create and scale cassandra {Kubernetes e2e suite} [code block] Issues about this test specifically: #27978 #28817 #39574 Previous issues for this suite: #36939 #39382 #39874 #42107 #43019
Error Output
error:
<*errors.errorString | 0xc420fc4950>: {Unverified for your environment
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1 Fix
Fix Flaky E2E Tests for Hazelcast and Cassandra in Kubernetes
The failures in the E2E tests for Hazelcast and Cassandra are likely due to resource constraints and timing issues in the Kubernetes environment. These tests may be sensitive to the state of the cluster and the availability of resources, leading to intermittent failures. Additionally, the tests may not be properly cleaning up resources after execution, causing conflicts in subsequent runs.
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- 1
Increase Resource Limits for Test Pods
Modify the resource limits for the test pods to ensure they have sufficient CPU and memory. This can help mitigate issues related to resource contention during test execution.
yamlresources: limits: cpu: '1000m' memory: '1Gi' requests: cpu: '500m' memory: '512Mi' - 2
Implement Retry Logic in Tests
Add retry logic to the tests to handle transient failures. This can help reduce the impact of flaky tests by allowing them to rerun upon failure.
goretryCount := 3 for i := 0; i < retryCount; i++ { err := runTest() if err == nil { break } time.Sleep(time.Second * time.Duration(i)) } - 3
Ensure Proper Cleanup of Resources
Review and update the test teardown procedures to ensure all resources are cleaned up after tests run. This will prevent conflicts in subsequent test executions.
godefer cleanupResources() func cleanupResources() { // Code to delete created resources } - 4
Update Test Dependencies
Check and update the dependencies for the Hazelcast and Cassandra tests to ensure compatibility with the latest Kubernetes version and to include any bug fixes related to E2E tests.
bashgo get k8s.io/kubernetes@latest - 5
Run Tests in a Dedicated Namespace
Run the E2E tests in a dedicated Kubernetes namespace to isolate them from other workloads. This can help reduce interference and improve test reliability.
bashkubectl create namespace e2e-tests kubectl apply -f test-deployment.yaml -n e2e-tests
Validation
After implementing the fixes, run the E2E tests again. Monitor the test results for any failures. A successful run with no failures across multiple executions will confirm that the issues have been resolved.
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Environment
Submitted by
Alex Chen
2450 rep