Back to all scenarios
Scenario #108
Networking
K8s v1.18, GKE

Network Partitioning Due to CNI Plugin Failure

A network partition occurred when the CNI plugin failed, preventing pods from communicating with each other.

Find this helpful?
What Happened

The CNI plugin failed to configure networking correctly, causing network partitions within the cluster.

Diagnosis Steps
  • 1Checked CNI plugin logs and found that the plugin was failing to initialize network interfaces for new pods.
  • 2Verified pod network connectivity and found that they could not reach services in other namespaces.
Root Cause

Misconfiguration or failure of the CNI plugin, causing networking issues.

Fix/Workaround
• Reinstalled the CNI plugin and applied the correct network configuration.
• Re-deployed the affected pods after ensuring the network configuration was correct.
Lessons Learned

Ensure that the CNI plugin is properly configured and functioning.

How to Avoid
  • 1Regularly test the CNI plugin and monitor logs for failures.
  • 2Use redundant networking setups to avoid single points of failure.
Previous ScenarioNext Scenario