mirror of
https://github.com/k3s-io/kubernetes.git
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292 lines
8.9 KiB
Go
292 lines
8.9 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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"time"
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"github.com/spf13/cobra"
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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/cli-runtime/pkg/genericclioptions"
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"k8s.io/cli-runtime/pkg/genericclioptions/printers"
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appsv1client "k8s.io/client-go/kubernetes/typed/apps/v1"
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corev1client "k8s.io/client-go/kubernetes/typed/core/v1"
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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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"k8s.io/kubernetes/pkg/kubectl/polymorphichelpers"
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"k8s.io/kubernetes/pkg/kubectl/scheme"
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"k8s.io/kubernetes/pkg/kubectl/util/i18n"
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)
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type ClusterInfoDumpOptions struct {
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PrintFlags *genericclioptions.PrintFlags
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PrintObj printers.ResourcePrinterFunc
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OutputDir string
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AllNamespaces bool
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Namespaces []string
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Timeout time.Duration
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AppsClient appsv1client.AppsV1Interface
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CoreClient corev1client.CoreV1Interface
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Namespace string
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RESTClientGetter genericclioptions.RESTClientGetter
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LogsForObject polymorphichelpers.LogsForObjectFunc
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genericclioptions.IOStreams
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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, ioStreams genericclioptions.IOStreams) *cobra.Command {
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o := &ClusterInfoDumpOptions{
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PrintFlags: genericclioptions.NewPrintFlags("").WithTypeSetter(scheme.Scheme).WithDefaultOutput("json"),
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IOStreams: ioStreams,
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}
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cmd := &cobra.Command{
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Use: "dump",
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Short: i18n.T("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(o.Complete(f, cmd))
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cmdutil.CheckErr(o.Run())
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},
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}
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o.PrintFlags.AddFlags(cmd)
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cmd.Flags().StringVar(&o.OutputDir, "output-directory", o.OutputDir, i18n.T("Where to output the files. If empty or '-' uses stdout, otherwise creates a directory hierarchy in that directory"))
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cmd.Flags().StringSliceVar(&o.Namespaces, "namespaces", o.Namespaces, "A comma separated list of namespaces to dump.")
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cmd.Flags().BoolVar(&o.AllNamespaces, "all-namespaces", o.AllNamespaces, "If true, dump all namespaces. If true, --namespaces is ignored.")
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cmdutil.AddPodRunningTimeoutFlag(cmd, defaultPodLogsTimeout)
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return cmd
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}
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var (
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dumpLong = templates.LongDesc(i18n.T(`
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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(i18n.T(`
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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(dir string, defaultWriter io.Writer, filename string) io.Writer {
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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 (o *ClusterInfoDumpOptions) Complete(f cmdutil.Factory, cmd *cobra.Command) error {
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printer, err := o.PrintFlags.ToPrinter()
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if err != nil {
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return err
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}
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o.PrintObj = printer.PrintObj
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config, err := f.ToRESTConfig()
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if err != nil {
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return err
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}
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o.CoreClient, err = corev1client.NewForConfig(config)
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if err != nil {
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return err
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}
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o.AppsClient, err = appsv1client.NewForConfig(config)
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if err != nil {
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return err
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}
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o.Timeout, err = cmdutil.GetPodRunningTimeoutFlag(cmd)
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if err != nil {
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return err
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}
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o.Namespace, _, err = f.ToRawKubeConfigLoader().Namespace()
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if err != nil {
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return err
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}
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// TODO this should eventually just be the completed kubeconfigflag struct
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o.RESTClientGetter = f
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o.LogsForObject = polymorphichelpers.LogsForObjectFn
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return nil
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}
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func (o *ClusterInfoDumpOptions) Run() error {
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nodes, err := o.CoreClient.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 := o.PrintObj(nodes, setupOutputWriter(o.OutputDir, o.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 o.AllNamespaces {
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namespaceList, err := o.CoreClient.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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if len(o.Namespaces) == 0 {
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namespaces = []string{
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metav1.NamespaceSystem,
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o.Namespace,
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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 := o.CoreClient.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 := o.PrintObj(events, setupOutputWriter(o.OutputDir, o.Out, path.Join(namespace, "events.json"))); err != nil {
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return err
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}
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rcs, err := o.CoreClient.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 := o.PrintObj(rcs, setupOutputWriter(o.OutputDir, o.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 := o.CoreClient.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 := o.PrintObj(svcs, setupOutputWriter(o.OutputDir, o.Out, path.Join(namespace, "services.json"))); err != nil {
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return err
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}
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sets, err := o.AppsClient.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 := o.PrintObj(sets, setupOutputWriter(o.OutputDir, o.Out, path.Join(namespace, "daemonsets.json"))); err != nil {
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return err
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}
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deps, err := o.AppsClient.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 := o.PrintObj(deps, setupOutputWriter(o.OutputDir, o.Out, path.Join(namespace, "deployments.json"))); err != nil {
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return err
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}
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rps, err := o.AppsClient.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 := o.PrintObj(rps, setupOutputWriter(o.OutputDir, o.Out, path.Join(namespace, "replicasets.json"))); err != nil {
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return err
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}
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pods, err := o.CoreClient.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 := o.PrintObj(pods, setupOutputWriter(o.OutputDir, o.Out, path.Join(namespace, "pods.json"))); err != nil {
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return err
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}
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printContainer := func(writer io.Writer, container corev1.Container, pod *corev1.Pod) {
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writer.Write([]byte(fmt.Sprintf("==== START logs for container %s of pod %s/%s ====\n", container.Name, pod.Namespace, pod.Name)))
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defer writer.Write([]byte(fmt.Sprintf("==== END logs for container %s of pod %s/%s ====\n", container.Name, pod.Namespace, pod.Name)))
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requests, err := o.LogsForObject(o.RESTClientGetter, pod, &corev1.PodLogOptions{Container: container.Name}, timeout, false)
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if err != nil {
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// Print error and return.
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writer.Write([]byte(fmt.Sprintf("Create log request error: %s\n", err.Error())))
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return
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}
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for _, request := range requests {
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data, err := request.DoRaw()
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if err != nil {
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// Print error and return.
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writer.Write([]byte(fmt.Sprintf("Request log error: %s\n", err.Error())))
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return
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}
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writer.Write(data)
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}
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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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containers := pod.Spec.Containers
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writer := setupOutputWriter(o.OutputDir, o.Out, path.Join(namespace, pod.Name, "logs.txt"))
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for i := range containers {
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printContainer(writer, containers[i], pod)
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}
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}
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}
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dest := o.OutputDir
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if len(dest) == 0 {
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dest = "standard output"
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}
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if dest != "-" {
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fmt.Fprintf(o.Out, "Cluster info dumped to %s\n", dest)
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}
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return nil
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}
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