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metrics.go
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metrics.go
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// Package metrics contains the metric definitions which will be exported by metrics-server-exporter.
package metrics
import (
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promauto"
)
const (
metricsNamespace = "metrics_server_exporter"
)
// Resource is a type to describe a compute resource
type Resource int
const (
// CPU describes cpu resources
CPU Resource = iota
// Memory describes memory resources
Memory
)
func (r Resource) String() string {
return [...]string{"cpu", "memory"}[r]
}
var (
nodeResourceUsage = promauto.NewGaugeVec(prometheus.GaugeOpts{
Namespace: metricsNamespace,
Subsystem: "node",
Name: "resource_usage",
Help: "blabla",
}, []string{"node", "resource"})
nodeResourceCapacity = promauto.NewGaugeVec(prometheus.GaugeOpts{
Namespace: metricsNamespace,
Subsystem: "node",
Name: "resource_capacity",
Help: "blabla",
}, []string{"node", "resource"})
podResourceUsage = promauto.NewGaugeVec(prometheus.GaugeOpts{
Namespace: metricsNamespace,
Subsystem: "pod",
Name: "resource_usage",
Help: "blabla",
}, []string{"namespace", "pod", "resource"})
)
// SetNodeResourceUsage sets the resource usage metric for the given node and compute resource.
func SetNodeResourceUsage(node string, r Resource, value float64) {
nodeResourceUsage.WithLabelValues(
node,
r.String(),
).Set(value)
}
// SetNodeResourceCapacity sets the actual capacity metric for a node and compute resource.
func SetNodeResourceCapacity(node string, r Resource, value float64) {
nodeResourceCapacity.WithLabelValues(
node,
r.String(),
).Set(value)
}
// SetPodResourceUsage sets the resource usage metric for the given namespace/pod combination.
func SetPodResourceUsage(namespace, pod string, r Resource, value float64) {
podResourceUsage.WithLabelValues(
namespace,
pod,
r.String(),
).Set(value)
}