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metrics.go
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metrics.go
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package cmd
import (
"fmt"
"io"
"time"
"github.com/jenkins-x/jx/pkg/jx/cmd/templates"
"github.com/jenkins-x/jx/pkg/kube"
"github.com/jenkins-x/jx/pkg/log"
"github.com/jenkins-x/jx/pkg/util"
"github.com/spf13/cobra"
"gopkg.in/AlecAivazis/survey.v1/terminal"
)
type MetricsOptions struct {
CommonOptions
Namespace string
Filter string
Duration string
Selector string
Metric string
}
var (
MetricsLong = templates.LongDesc(`
Gets the metrics of the newest pod for a Deployment.
`)
MetricsExample = templates.Examples(`
# displays metrics of the latest pod in deployment myapp
jx metrics myapp
# Tails the metrics of the container foo in the latest pod in deployment myapp
jx metrics myapp -c foo
`)
)
func NewCmdMetrics(f Factory, in terminal.FileReader, out terminal.FileWriter, errOut io.Writer) *cobra.Command {
options := &MetricsOptions{
CommonOptions: CommonOptions{
Factory: f,
In: in,
Out: out,
Err: errOut,
},
}
cmd := &cobra.Command{
Use: "metrics [deployment]",
Short: "Gets the metrics of the latest pod for a deployment",
Long: MetricsLong,
Example: MetricsExample,
Aliases: []string{"metrics"},
Run: func(cmd *cobra.Command, args []string) {
options.Cmd = cmd
options.Args = args
err := options.Run()
CheckErr(err)
},
}
cmd.Flags().StringVarP(&options.Namespace, "namespace", "n", "", "the namespace to look for the Deployment. Defaults to the current namespace")
cmd.Flags().StringVarP(&options.Filter, "filter", "f", "", "Filters the available deployments if no deployment argument is provided")
cmd.Flags().StringVarP(&options.Duration, "duration", "d", "", "The duration to query (e.g. 1.5h, 20s, 5m")
cmd.Flags().StringVarP(&options.Selector, "selector", "s", "", "The pod selector to use to query for pods")
cmd.Flags().StringVarP(&options.Metric, "metric", "m", "", "The heapster metric name")
return cmd
}
func (o *MetricsOptions) Run() error {
args := o.Args
client, curNs, err := o.KubeClient()
if err != nil {
return err
}
ns := o.Namespace
if ns == "" {
ns = curNs
}
pod := ""
selector := o.Selector
if selector == "" {
names, err := kube.GetDeploymentNames(client, ns, o.Filter)
if err != nil {
return err
}
name := ""
if len(args) == 0 {
if len(names) == 0 {
return fmt.Errorf("There are no Deployments running")
}
n, err := util.PickName(names, "Pick Deployment:", o.In, o.Out, o.Err)
if err != nil {
return err
}
name = n
} else {
name = args[0]
if util.StringArrayIndex(names, name) < 0 {
return util.InvalidArg(name, names)
}
}
p, err := o.waitForReadyPodForDeployment(client, ns, name, names, false)
if err != nil {
return err
}
pod = p
if pod == "" {
return fmt.Errorf("No pod found for namespace %s with name %s", ns, name)
}
}
if o.Duration != "" || o.Metric != "" {
start := ""
end := ""
if o.Duration != "" && pod != "" {
d, err := time.ParseDuration(o.Duration)
if err != nil {
return fmt.Errorf("Failed to parse duration %s due to %s", o.Duration, err)
}
e := time.Now()
s := e.Add(-d)
start = s.Format(time.RFC3339)
end = e.Format(time.RFC3339)
}
heapster := kube.HeapterConfig{
KubeClient: client,
}
data, err := heapster.GetPodMetrics(ns, pod, selector, o.Metric, start, end)
if err != nil {
return err
}
log.Infof("%s\n", string(data))
return nil
}
if selector != "" {
args = []string{"top", "pod", "--selector", selector, "--namespace", ns}
} else {
args = []string{"top", "pod", pod, "--namespace", ns}
}
err = o.RunCommand("kubectl", args...)
if err != nil {
return err
}
return nil
}