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Scenario #64
Cluster Management
K8s v1.19, GKE
Excessive Pod Restarts Due to Resource Limits
A pod was restarting frequently due to resource limits being too low, causing the container to be killed.
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What Happened
Pods were being killed and restarted due to the container’s resource requests and limits being set too low, causing OOM (Out of Memory) kills.
Diagnosis Steps
- 1Checked pod logs and identified frequent OOM kills.
- 2Reviewed resource requests and limits in the pod spec.
Root Cause
Resource limits were too low, leading to the container being killed when it exceeded available memory.
Fix/Workaround
• Increased the memory limits and requests for the affected pods.
• Re-deployed the updated pods and monitored for stability.Lessons Learned
Proper resource requests and limits should be set to avoid OOM kills and pod restarts.
How to Avoid
- 1Regularly review resource requests and limits based on workload requirements.
- 2Use resource usage metrics to set more accurate resource limits.