ci-kubernetes-e2e-gci-gce-reboot-release-1.5: broken test run
Problem
https://k8s-gubernator.appspot.com/build/kubernetes-jenkins/logs/ci-kubernetes-e2e-gci-gce-reboot-release-1.5/684/ Multiple broken tests: Failed: [k8s.io] Reboot [Disruptive] [Feature:Reboot] each node by dropping all inbound packets for a while and ensure they function afterwards {Kubernetes e2e suite} [code block] Issues about this test specifically: #33405 Failed: [k8s.io] Reboot [Disruptive] [Feature:Reboot] each node by dropping all outbound packets for a while and ensure they function afterwards {Kubernetes e2e suite} [code block] Issues about this test specifically: #33703 #36230 Failed: [k8s.io] Reboot [Disruptive] [Feature:Reboot] each node by ordering unclean reboot and ensure they function upon restart {Kubernetes e2e suite} [code block] Issues about this test specifically: #33882 #35316 Failed: [k8s.io] Reboot [Disruptive] [Feature:Reboot] each node by triggering kernel panic and ensure they function upon restart {Kubernetes e2e suite} [code block] Issues about this test specifically: #34123 #35398
Unverified for your environment
Select your OS to check compatibility.
1 Fix
Fix Flaky Reboot Tests in Kubernetes E2E Suite
The reboot tests are failing due to network packet drop simulations that may not be accurately reflecting real-world scenarios. Additionally, unclean reboots and kernel panic handling might not be properly managed in the test environment, leading to inconsistent results across different runs.
Awaiting Verification
Be the first to verify this fix
- 1
Review and Update Test Cases
Investigate the existing test cases related to reboot functionality. Ensure that they are designed to handle various network conditions and system states. Update the tests to include more robust error handling and logging.
gofunc TestRebootWithPacketDrop() { // Implement packet drop simulation // Add logging for network state before and after reboot } - 2
Enhance Network Simulation
Modify the network simulation logic to better mimic real-world scenarios. This includes adjusting the duration and conditions under which packets are dropped, ensuring that the tests can handle transient network failures gracefully.
bashiptables -A INPUT -j DROP sleep 30 iptables -D INPUT -j DROP - 3
Implement Cleanup Procedures
Add cleanup procedures to the tests to ensure that the system is in a known good state before each test run. This includes resetting network configurations and ensuring all nodes are healthy.
bashkubectl delete pods --all --grace-period=0 --force kubectl get nodes | xargs -I {} kubectl drain {} --ignore-daemonsets --delete-local-data - 4
Run Tests in Isolated Environment
Execute the tests in an isolated environment to reduce interference from other processes. This can be achieved by using dedicated test clusters or namespaces specifically configured for e2e tests.
yamlkubectl create namespace e2e-test kubectl apply -f test-deployment.yaml -n e2e-test - 5
Monitor and Log Test Results
Implement comprehensive logging for each test case to capture detailed information about failures. This will help in diagnosing issues and improving the tests over time.
golog.Printf("Test %s failed at %s", testName, time.Now())
Validation
To confirm the fix worked, rerun the affected e2e tests and verify that they pass consistently across multiple runs. Monitor logs for any errors or anomalies during the test execution.
Sign in to verify this fix
Environment
Submitted by
Alex Chen
2450 rep