Displaying node resource usage

It is handy to know what resources are consumed by nodes. To display the resources used by nodes, run the following command:

$ kubectl top nodes

We get the following list of nodes using the preceding command:

Figure 3.6 – Top nodes list with resources used

The previous command shows node metrics such as CPU cores, memory (in bytes), and CPU and memory percentage usage.

Also, by using $ watch kubectl top nodes, you can watch and monitor nodes in real time when, for example, load testing your application or doing other node operations.

Note

The watch command might not be present in your computer, you might need to install it. The watch command will run the specified command and refresh the screen every few seconds.