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Scenario #63
Cluster Management
K8s v1.24, Azure AKS
Intermittent Network Latency Due to Misconfigured CNI Plugin
Network latency issues occurred intermittently due to misconfiguration in the CNI (Container Network Interface) plugin.
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What Happened
Network latency was sporadically high between pods due to improper settings in the CNI plugin.
Diagnosis Steps
- 1Analyzed network metrics and noticed high latency between pods in different nodes.
- 2Checked CNI plugin logs and configuration and found incorrect MTU (Maximum Transmission Unit) settings.
Root Cause
MTU misconfiguration in the CNI plugin caused packet fragmentation, resulting in network latency.
Fix/Workaround
• Corrected the MTU setting in the CNI configuration to match the network infrastructure.
• Restarted the CNI plugin and verified network performance.Lessons Learned
Proper CNI configuration is essential to avoid network latency and connectivity issues.
How to Avoid
- 1Ensure CNI plugin configurations match the underlying network settings.
- 2Test network performance after changes to the CNI configuration.