Hands-On Microservices with Kubernetes

Introducing the Kubernetes metrics API

The Kubernetes metrics API is very generic. It supports node and pod metrics, as well as custom metrics. A metric has a usage field, a timestamp, and a window (the time range the metric was collected in). Here is the API definition for node metrics:

// resource usage metrics of a node.type NodeMetrics struct {  metav1.TypeMeta  metav1.ObjectMeta  // The following fields define time interval from which metrics were  // collected from the interval [Timestamp-Window, Timestamp].  Timestamp metav1.Time  Window metav1.Duration  // The memory usage is the memory working set.  Usage corev1.ResourceList}// NodeMetricsList is a list of NodeMetrics.type NodeMetricsList struct {  metav1.TypeMeta // Standard list metadata. ...