DevOps with Kubernetes - Second Edition

Monitoring containers

As a container is basically a thin wrapper around our program and dependent runtime libraries, the metrics collected at the container level would be similar to the metrics we get at the container host, particularly with regard to the use of system resources. Although collecting these metrics from both the containers and their hosts might seem redundant, it actually allows us to solve problems related to monitoring moving containers. The idea is quite simple: what we need to do is attach logical information to metrics, such as pod labels or their controller names. In this way, metrics coming from containers across distinct hosts can be grouped meaningfully. Consider the following diagram. Let's say we want to know how ...