216 lines
6.8 KiB
Go
216 lines
6.8 KiB
Go
/*
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Copyright 2016 The Kubernetes 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 cmd
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import (
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"fmt"
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"io"
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"os"
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"path"
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"github.com/spf13/cobra"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/kubectl"
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"k8s.io/kubernetes/pkg/kubectl/cmd/templates"
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cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
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)
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// NewCmdCreateSecret groups subcommands to create various types of secrets
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func NewCmdClusterInfoDump(f cmdutil.Factory, cmdOut io.Writer) *cobra.Command {
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cmd := &cobra.Command{
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Use: "dump",
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Short: "Dump lots of relevant info for debugging and diagnosis",
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Long: dumpLong,
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Example: dumpExample,
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Run: func(cmd *cobra.Command, args []string) {
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cmdutil.CheckErr(dumpClusterInfo(f, cmd, args, cmdOut))
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},
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}
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cmd.Flags().String("output-directory", "", "Where to output the files. If empty or '-' uses stdout, otherwise creates a directory hierarchy in that directory")
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cmd.Flags().StringSlice("namespaces", []string{}, "A comma separated list of namespaces to dump.")
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cmd.Flags().Bool("all-namespaces", false, "If true, dump all namespaces. If true, --namespaces is ignored.")
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return cmd
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}
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var (
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dumpLong = templates.LongDesc(`
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Dumps cluster info out suitable for debugging and diagnosing cluster problems. By default, dumps everything to
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stdout. You can optionally specify a directory with --output-directory. If you specify a directory, kubernetes will
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build a set of files in that directory. By default only dumps things in the 'kube-system' namespace, but you can
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switch to a different namespace with the --namespaces flag, or specify --all-namespaces to dump all namespaces.
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The command also dumps the logs of all of the pods in the cluster, these logs are dumped into different directories
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based on namespace and pod name.`)
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dumpExample = templates.Examples(`
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# Dump current cluster state to stdout
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kubectl cluster-info dump
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# Dump current cluster state to /path/to/cluster-state
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kubectl cluster-info dump --output-directory=/path/to/cluster-state
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# Dump all namespaces to stdout
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kubectl cluster-info dump --all-namespaces
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# Dump a set of namespaces to /path/to/cluster-state
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kubectl cluster-info dump --namespaces default,kube-system --output-directory=/path/to/cluster-state`)
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)
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func setupOutputWriter(cmd *cobra.Command, defaultWriter io.Writer, filename string) io.Writer {
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dir := cmdutil.GetFlagString(cmd, "output-directory")
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if len(dir) == 0 || dir == "-" {
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return defaultWriter
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}
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fullFile := path.Join(dir, filename)
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parent := path.Dir(fullFile)
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cmdutil.CheckErr(os.MkdirAll(parent, 0755))
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file, err := os.Create(path.Join(dir, filename))
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cmdutil.CheckErr(err)
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return file
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}
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func dumpClusterInfo(f cmdutil.Factory, cmd *cobra.Command, args []string, out io.Writer) error {
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clientset, err := f.ClientSet()
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if err != nil {
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return err
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}
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printer, _, err := kubectl.GetPrinter("json", "", false, true)
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if err != nil {
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return err
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}
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nodes, err := clientset.Core().Nodes().List(metav1.ListOptions{})
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if err != nil {
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return err
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}
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if err := printer.PrintObj(nodes, setupOutputWriter(cmd, out, "nodes.json")); err != nil {
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return err
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}
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var namespaces []string
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if cmdutil.GetFlagBool(cmd, "all-namespaces") {
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namespaceList, err := clientset.Core().Namespaces().List(metav1.ListOptions{})
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if err != nil {
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return err
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}
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for ix := range namespaceList.Items {
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namespaces = append(namespaces, namespaceList.Items[ix].Name)
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}
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} else {
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namespaces = cmdutil.GetFlagStringSlice(cmd, "namespaces")
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if len(namespaces) == 0 {
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cmdNamespace, _, err := f.DefaultNamespace()
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if err != nil {
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return err
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}
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namespaces = []string{
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metav1.NamespaceSystem,
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cmdNamespace,
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}
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}
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}
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for _, namespace := range namespaces {
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// TODO: this is repetitive in the extreme. Use reflection or
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// something to make this a for loop.
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events, err := clientset.Core().Events(namespace).List(metav1.ListOptions{})
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if err != nil {
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return err
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}
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if err := printer.PrintObj(events, setupOutputWriter(cmd, out, path.Join(namespace, "events.json"))); err != nil {
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return err
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}
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rcs, err := clientset.Core().ReplicationControllers(namespace).List(metav1.ListOptions{})
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if err != nil {
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return err
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}
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if err := printer.PrintObj(rcs, setupOutputWriter(cmd, out, path.Join(namespace, "replication-controllers.json"))); err != nil {
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return err
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}
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svcs, err := clientset.Core().Services(namespace).List(metav1.ListOptions{})
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if err != nil {
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return err
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}
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if err := printer.PrintObj(svcs, setupOutputWriter(cmd, out, path.Join(namespace, "services.json"))); err != nil {
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return err
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}
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sets, err := clientset.Extensions().DaemonSets(namespace).List(metav1.ListOptions{})
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if err != nil {
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return err
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}
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if err := printer.PrintObj(sets, setupOutputWriter(cmd, out, path.Join(namespace, "daemonsets.json"))); err != nil {
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return err
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}
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deps, err := clientset.Extensions().Deployments(namespace).List(metav1.ListOptions{})
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if err != nil {
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return err
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}
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if err := printer.PrintObj(deps, setupOutputWriter(cmd, out, path.Join(namespace, "deployments.json"))); err != nil {
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return err
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}
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rps, err := clientset.Extensions().ReplicaSets(namespace).List(metav1.ListOptions{})
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if err != nil {
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return err
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}
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if err := printer.PrintObj(rps, setupOutputWriter(cmd, out, path.Join(namespace, "replicasets.json"))); err != nil {
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return err
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}
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pods, err := clientset.Core().Pods(namespace).List(metav1.ListOptions{})
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if err != nil {
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return err
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}
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if err := printer.PrintObj(pods, setupOutputWriter(cmd, out, path.Join(namespace, "pods.json"))); err != nil {
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return err
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}
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for ix := range pods.Items {
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pod := &pods.Items[ix]
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writer := setupOutputWriter(cmd, out, path.Join(namespace, pod.Name, "logs.txt"))
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writer.Write([]byte(fmt.Sprintf("==== START logs for %s/%s ====\n", pod.Namespace, pod.Name)))
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request, err := f.LogsForObject(pod, &api.PodLogOptions{})
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if err != nil {
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return err
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}
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data, err := request.DoRaw()
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if err != nil {
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return err
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}
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writer.Write(data)
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writer.Write([]byte(fmt.Sprintf("==== END logs for %s/%s ====\n", pod.Namespace, pod.Name)))
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}
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}
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dir := cmdutil.GetFlagString(cmd, "output-directory")
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if len(dir) == 0 {
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dir = "."
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}
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if dir != "-" {
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fmt.Fprintf(out, "Cluster info dumped to %s", dir)
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}
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return nil
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}
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