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/*
Copyright 2016 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package metricsutil
import (
"fmt"
"io"
metrics_api "k8s.io/heapster/metrics/apis/metrics/v1alpha1"
"k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/resource"
"k8s.io/kubernetes/pkg/kubectl"
)
var (
MeasuredResources = []api.ResourceName{
api.ResourceCPU,
api.ResourceMemory,
}
NodeColumns = []string{"NAME", "CPU(cores)", "CPU%", "MEMORY(bytes)", "MEMORY%"}
PodColumns = []string{"NAME", "CPU(cores)", "MEMORY(bytes)"}
NamespaceColumn = "NAMESPACE"
PodColumn = "POD"
)
type ResourceMetricsInfo struct {
Name string
Metrics api.ResourceList
Available api.ResourceList
}
type TopCmdPrinter struct {
out io.Writer
}
func NewTopCmdPrinter(out io.Writer) *TopCmdPrinter {
return &TopCmdPrinter{out: out}
}
func (printer *TopCmdPrinter) PrintNodeMetrics(metrics []metrics_api.NodeMetrics, availableResources map[string]api.ResourceList) error {
if len(metrics) == 0 {
return nil
}
w := kubectl.GetNewTabWriter(printer.out)
defer w.Flush()
printColumnNames(w, NodeColumns)
var usage api.ResourceList
for _, m := range metrics {
err := api.Scheme.Convert(&m.Usage, &usage, nil)
if err != nil {
return err
}
printMetricsLine(w, &ResourceMetricsInfo{
Name: m.Name,
Metrics: usage,
Available: availableResources[m.Name],
})
}
return nil
}
func (printer *TopCmdPrinter) PrintPodMetrics(metrics []metrics_api.PodMetrics, printContainers bool, withNamespace bool) error {
if len(metrics) == 0 {
return nil
}
w := kubectl.GetNewTabWriter(printer.out)
defer w.Flush()
if withNamespace {
printValue(w, NamespaceColumn)
}
if printContainers {
printValue(w, PodColumn)
}
printColumnNames(w, PodColumns)
for _, m := range metrics {
err := printSinglePodMetrics(w, &m, printContainers, withNamespace)
if err != nil {
return err
}
}
return nil
}
func printColumnNames(out io.Writer, names []string) {
for _, name := range names {
printValue(out, name)
}
fmt.Fprint(out, "\n")
}
func printSinglePodMetrics(out io.Writer, m *metrics_api.PodMetrics, printContainersOnly bool, withNamespace bool) error {
containers := make(map[string]api.ResourceList)
podMetrics := make(api.ResourceList)
for _, res := range MeasuredResources {
podMetrics[res], _ = resource.ParseQuantity("0")
}
for _, c := range m.Containers {
var usage api.ResourceList
err := api.Scheme.Convert(&c.Usage, &usage, nil)
if err != nil {
return err
}
containers[c.Name] = usage
if !printContainersOnly {
for _, res := range MeasuredResources {
quantity := podMetrics[res]
quantity.Add(usage[res])
podMetrics[res] = quantity
}
}
}
if printContainersOnly {
for contName := range containers {
if withNamespace {
printValue(out, m.Namespace)
}
printValue(out, m.Name)
printMetricsLine(out, &ResourceMetricsInfo{
Name: contName,
Metrics: containers[contName],
Available: api.ResourceList{},
})
}
} else {
if withNamespace {
printValue(out, m.Namespace)
}
printMetricsLine(out, &ResourceMetricsInfo{
Name: m.Name,
Metrics: podMetrics,
Available: api.ResourceList{},
})
}
return nil
}
func printMetricsLine(out io.Writer, metrics *ResourceMetricsInfo) {
printValue(out, metrics.Name)
printAllResourceUsages(out, metrics)
fmt.Fprint(out, "\n")
}
func printValue(out io.Writer, value interface{}) {
fmt.Fprintf(out, "%v\t", value)
}
func printAllResourceUsages(out io.Writer, metrics *ResourceMetricsInfo) {
for _, res := range MeasuredResources {
quantity := metrics.Metrics[res]
printSingleResourceUsage(out, res, quantity)
fmt.Fprint(out, "\t")
if available, found := metrics.Available[res]; found {
fraction := float64(quantity.MilliValue()) / float64(available.MilliValue()) * 100
fmt.Fprintf(out, "%d%%\t", int64(fraction))
}
}
}
func printSingleResourceUsage(out io.Writer, resourceType api.ResourceName, quantity resource.Quantity) {
switch resourceType {
case api.ResourceCPU:
fmt.Fprintf(out, "%vm", quantity.MilliValue())
case api.ResourceMemory:
fmt.Fprintf(out, "%vMi", quantity.Value()/(1024*1024))
default:
fmt.Fprintf(out, "%v", quantity.Value())
}
}
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