Print the current cpu usage with the command: cat /sys/fs/cgroup/cpu.stat On systems with cgroups v2, print the current memory usage with the command: cat /sys/fs/cgroup/memory.current If the directories /sys/fs/cgroup/memory or /sys/fs/cgroup/cpu don't exist, you're likely working on a system with cgroups v2. You can find more information on these files in the Linux kernel docs. This post on Stack Exchange provides more details, and this Python code provides a useful practical example. The CPU time (in nanoseconds) obtained by this groupĬonverting this value into a more usable measurement like CPU usage percentage requires some calculation. Note the value returned by age is not immediately useful as it returns: Print the current cpu usage with the command: cat /sys/fs/cgroup/cpu/age Print the current memory usage with the command: cat /sys/fs/cgroup/memory/age_in_bytes If the metrics service isn't available, it's still possible to determine the memory usage of a single pod by entering an interactive session and printing the contents of cgroup interface files.Įnter an interactive session with the following command, replacing podname with the name of the pod you wish to inspect: kubectl exec -it podname - sh In this case, you can install the metrics server with the instructions on GitHub.

The following error indicates that the metrics server is not installed: error: Metrics API not available Node resource usage is available with the command: kubectl top node Although the metrics server isn't built into Kubernetes, most clusters either bundle it or provide an easy solution for enabling it.Īfter the metrics service is installed, pod resources are displayed with the command: kubectl top pod The metrics server provides Kubernetes clusters with a lightweight and highly scalable solution for collecting CPU and memory resources.

In this post, I show you how to view the CPU and memory usage of pods in Kubernetes. But how do you track resource usage of pods spread across a Kubernetes cluster? Tracking the resource usage of local processes is relatively easy in Linux with the top or htop command.

Linux check cpu and memory usage