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Added draft for collector metrics of k8s

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This commit is contained in:
Alexandr Kozlenkov
2018-10-29 02:05:25 +03:00
committed by Bradley Cicenas
parent 187adf0540
commit 7f6ff0b599
4 changed files with 93 additions and 61 deletions
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92
connector/kubernetes.go
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@@ -1,9 +1,12 @@
package connector
import (
"fmt"
"os"
"path/filepath"
"strings"
"sync"
"time"
"github.com/bcicen/ctop/connector/collector"
"github.com/bcicen/ctop/connector/manager"
@@ -59,42 +62,46 @@ func NewKubernetes() Connector {
}
go k.Loop()
k.refreshAll()
go k.watchEvents()
return k
}
func (k *Kubernetes) watchEvents() {
for {
log.Info("kubernetes event listener starting")
allEvents, err := k.clientset.CoreV1().Events(namespace).List(metav1.ListOptions{})
if err != nil {
log.Error(err.Error())
return
}
for _, e := range allEvents.Items {
if e.Kind != "pod" {
continue
}
actionName := strings.Split(e.Action, ":")[0]
switch actionName {
case "start", "die", "pause", "unpause", "health_status":
log.Debugf("handling docker event: action=%s id=%s", e.Action, e.UID)
k.needsRefresh <- e.Name
case "destroy":
log.Debugf("handling docker event: action=%s id=%s", e.Action, e.UID)
k.delByID(e.Name)
default:
log.Debugf("handling docker event: %v", e)
k.needsRefresh <- e.Name
}
}
time.Sleep(1 * time.Second)
}
}
func (k *Kubernetes) Loop() {
for id := range k.needsRefresh {
c := k.MustGet(id)
k.refresh(c)
}
//log.Debug(">>>>>>1")
//for {
// log.Debug(">>>>>>2")
// pods, err := k.clientset.CoreV1().Pods("").List(metav1.ListOptions{})
// if err != nil {
// panic(err.Error())
// }
// log.Debugf("There are %d pods in the cluster\n", len(pods.Items))
// // Examples for error handling:
// // - Use helper functions like e.g. errors.IsNotFound()
// // - And/or cast to StatusError and use its properties like e.g. ErrStatus.Message
// namespace := "akozlenkov"
// pod := "example-xxxxx"
// _, err = k.clientset.CoreV1().Pods(namespace).Get(pod, metav1.GetOptions{})
// if errors.IsNotFound(err) {
// log.Debugf("Pod %s in namespace %s not found\n", pod, namespace)
// } else if statusError, isStatus := err.(*errors.StatusError); isStatus {
// log.Debugf("Error getting pod %s in namespace %s: %v\n",
// pod, namespace, statusError.ErrStatus.Message)
// } else if err != nil {
// panic(err.Error())
// } else {
// log.Debugf("Found pod %s in namespace %s\n", pod, namespace)
// }
// time.Sleep(10 * time.Second)
//}
}
// Get a single container, creating one anew if not existing
@@ -123,13 +130,25 @@ func (k *Kubernetes) refresh(c *container.Container) {
return
}
c.SetMeta("name", insp.Name)
c.SetMeta("image", "stub")
c.SetMeta("IPs", "stub")
c.SetMeta("ports", "stub")
c.SetMeta("created", "stub")
c.SetMeta("health", "stub")
c.SetMeta("[ENV-VAR]", "stub")
c.SetState("stub")
if len(insp.Spec.Containers) >= 1 {
c.SetMeta("image", insp.Spec.Containers[0].Image)
c.SetMeta("ports", k8sPort(insp.Spec.Containers[0].Ports))
for _, env := range insp.Spec.Containers[0].Env {
c.SetMeta("[ENV-VAR]", env.Name+"="+env.Value)
}
}
c.SetMeta("IPs", insp.Status.PodIP)
c.SetMeta("created", insp.CreationTimestamp.Format("Mon Jan 2 15:04:05 2006"))
c.SetMeta("health", string(insp.Status.Phase))
c.SetState("running")
}
func k8sPort(ports []v1.ContainerPort) string {
str := []string{}
for _, p := range ports {
str = append(str, fmt.Sprintf("%s:%d -> %d", p.HostIP, p.HostPort, p.ContainerPort))
}
return strings.Join(str, "\n")
}
func (k *Kubernetes) inspect(id string) *v1.Pod {
@@ -167,9 +186,12 @@ func (k *Kubernetes) refreshAll() {
for _, pod := range allPods.Items {
c := k.MustGet(pod.Name)
c.SetMeta("uid", string(pod.UID))
c.SetMeta("name", pod.Name)
if pod.Initializers != nil && pod.Initializers.Result != nil {
c.SetState(pod.Initializers.Result.Status)
} else {
c.SetState(string(pod.Status.Phase))
}
k.needsRefresh <- c.Id
}