Refactor support dump CLI (#1301)
This commit is contained in:
Ta-Ching Chen
@@ -0,0 +1,254 @@
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/*
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Copyright 2018 The Fission Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package resources
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import (
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"bufio"
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"bytes"
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"fmt"
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"io"
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"path/filepath"
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"sync"
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corev1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/client-go/kubernetes"
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"github.com/fission/fission/pkg/fission-cli/log"
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)
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const (
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KubernetesService = "Service"
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KubernetesDeployment = "Deployment"
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KubernetesPod = "Pod"
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KubernetesHPA = "HPA"
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KubernetesNode = "Node"
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KubernetesDaemonSet = "DaemonSet"
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)
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// Kubernetes Version
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type KubernetesVersion struct {
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client *kubernetes.Clientset
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}
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func NewKubernetesVersion(clientset *kubernetes.Clientset) Resource {
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return KubernetesVersion{client: clientset}
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}
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func (res KubernetesVersion) Dump(dumpDir string) {
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serverVer, err := res.client.ServerVersion()
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if err != nil {
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log.Info(fmt.Sprintf("Error setting up kubernetes client: %v", err))
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return
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}
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file := fmt.Sprintf("%v/%v", dumpDir, "kubernetes-version.txt")
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writeToFile(file, serverVer)
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}
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// Kubernetes Object Dumper
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type KubernetesObjectDumper struct {
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client *kubernetes.Clientset
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objType string
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selector string
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}
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func NewKubernetesObjectDumper(clientset *kubernetes.Clientset, objType string, selector string) Resource {
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return KubernetesObjectDumper{
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client: clientset,
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objType: objType,
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selector: selector,
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}
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}
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func (res KubernetesObjectDumper) Dump(dumpDir string) {
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switch res.objType {
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case KubernetesService:
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objs, err := res.client.CoreV1().Services(metav1.NamespaceAll).List(metav1.ListOptions{LabelSelector: res.selector})
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if err != nil {
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log.Info(fmt.Sprintf("Error getting %v list with selector %v: %v", res.objType, res.selector, err))
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return
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}
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for _, item := range objs.Items {
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item = serviceClean(item)
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f := getFileName(dumpDir, item.ObjectMeta)
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writeToFile(f, item)
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}
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case KubernetesDeployment:
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objs, err := res.client.AppsV1().Deployments(metav1.NamespaceAll).List(metav1.ListOptions{LabelSelector: res.selector})
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if err != nil {
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log.Info(fmt.Sprintf("Error getting %v list with selector %v: %v", res.objType, res.selector, err))
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return
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}
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for _, item := range objs.Items {
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f := getFileName(dumpDir, item.ObjectMeta)
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writeToFile(f, item)
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}
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case KubernetesPod:
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objs, err := res.client.CoreV1().Pods(metav1.NamespaceAll).List(metav1.ListOptions{LabelSelector: res.selector})
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if err != nil {
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log.Info(fmt.Sprintf("Error getting %v list with selector %v: %v", res.objType, res.selector, err))
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return
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}
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for _, item := range objs.Items {
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f := getFileName(dumpDir, item.ObjectMeta)
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writeToFile(f, item)
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}
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case KubernetesHPA:
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objs, err := res.client.AutoscalingV2beta1().HorizontalPodAutoscalers(metav1.NamespaceAll).List(metav1.ListOptions{LabelSelector: res.selector})
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if err != nil {
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log.Info(fmt.Sprintf("Error getting %v list with selector %v: %v", res.objType, res.selector, err))
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return
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}
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for _, item := range objs.Items {
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f := getFileName(dumpDir, item.ObjectMeta)
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writeToFile(f, item)
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}
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case KubernetesDaemonSet:
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objs, err := res.client.AppsV1().DaemonSets(metav1.NamespaceAll).List(metav1.ListOptions{LabelSelector: res.selector})
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if err != nil {
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log.Info(fmt.Sprintf("Error getting %v list with selector %v: %v", res.objType, res.selector, err))
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return
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}
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for _, item := range objs.Items {
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f := getFileName(dumpDir, item.ObjectMeta)
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writeToFile(f, item)
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}
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case KubernetesNode:
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objs, err := res.client.CoreV1().Nodes().List(metav1.ListOptions{LabelSelector: res.selector})
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if err != nil {
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log.Info(fmt.Sprintf("Error getting %v list with selector %v: %v", res.objType, res.selector, err))
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return
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}
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for _, item := range objs.Items {
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item = nodeClean(item)
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// Node doesn't have namespace value, use name here
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f := filepath.Clean(fmt.Sprintf("%v/%v", dumpDir, item.Name))
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writeToFile(f, item)
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}
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default:
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log.Info(fmt.Sprintf("Unknown type: %v", res.objType))
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return
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}
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}
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// serviceClean remove sensitive data(e.g. public IP, external name) from service objects
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func serviceClean(svc corev1.Service) corev1.Service {
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svc.Spec.ExternalIPs = []string{}
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svc.Spec.LoadBalancerIP = ""
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svc.Spec.LoadBalancerSourceRanges = []string{}
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svc.Spec.ExternalName = ""
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svc.Status.LoadBalancer = corev1.LoadBalancerStatus{}
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return svc
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}
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func nodeClean(node corev1.Node) corev1.Node {
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var nodeAddresses []corev1.NodeAddress
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for _, address := range node.Status.Addresses {
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// use whitelist to filter the necessary information for debugging
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if address.Type == "InternalIP" || address.Type == "Hostname" {
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nodeAddresses = append(nodeAddresses, address)
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}
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}
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node.Status.Addresses = nodeAddresses
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return node
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}
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type KubernetesPodLogDumper struct {
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client *kubernetes.Clientset
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labelSelector string
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}
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func NewKubernetesPodLogDumper(clientset *kubernetes.Clientset, selector string) Resource {
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return KubernetesPodLogDumper{
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client: clientset,
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labelSelector: selector,
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}
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}
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func (res KubernetesPodLogDumper) Dump(dumpDir string) {
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l, err := res.client.CoreV1().
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Pods(metav1.NamespaceAll).
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List(metav1.ListOptions{LabelSelector: res.labelSelector})
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if err != nil {
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log.Info(fmt.Sprintf("Error getting controller list: %v", err))
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return
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}
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wg := &sync.WaitGroup{}
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for _, p := range l.Items {
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wg.Add(1)
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go func(pod corev1.Pod) {
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defer wg.Done()
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// dump logs from each containers
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for _, container := range append(pod.Spec.Containers, pod.Spec.InitContainers...) {
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req := res.client.CoreV1().Pods(pod.Namespace).
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GetLogs(pod.Name, &corev1.PodLogOptions{Container: container.Name})
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stream, err := req.Stream()
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if err != nil {
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log.Info(fmt.Sprintf("Error streaming logs for pod %v: %v", pod.Name, err))
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return
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}
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reader := bufio.NewReader(stream)
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var buffer bytes.Buffer
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for {
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line, _, err := reader.ReadLine()
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if err != nil {
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if err == io.EOF {
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stream.Close()
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break
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}
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log.Info(fmt.Sprintf("Error reading logs from buffer: %v", err))
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return
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}
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_, err = buffer.WriteString(string(line) + "\n")
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if err != nil {
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log.Info(fmt.Sprintf("Error writing bytes to buffer: %v", err))
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}
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}
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f := getPodFileName(dumpDir, pod.ObjectMeta, container.Name)
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writeToFile(f, buffer.String())
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stream.Close()
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}
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}(p)
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}
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wg.Wait()
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}
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