CHECK WITHOUT METRICS SERVER or ANY THIRD PARTY TOOL
If you want to check pods cpu/memory usage without installing any third party tool then you can get memory and cpu usage of pod from cgroup.
- Go to pod’s exec mode
kubectl exec -it pod_name -n namespace -- /bin/bash
cat /sys/fs/cgroup/cpu/cpuacct.usagefor cpu usage
cat /sys/fs/cgroup/memory/memory.usage_in_bytesfor memory usage
Make Sure you have added the resources section (requests and limits) to deployment so that it can calculate the usage based on cgroup and container will respect the limits set on pod level
NOTE: This usage is in bytes. This can vary upon pod usage and these values changes frequently.