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debug.go
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debug.go
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// Copyright 2020 Chaos Mesh Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
package cmd
import (
"context"
"fmt"
"log"
"strings"
"github.com/spf13/cobra"
v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
cm "github.com/chaos-mesh/chaos-mesh/pkg/debug/common"
"github.com/chaos-mesh/chaos-mesh/pkg/debug/iochaos"
"github.com/chaos-mesh/chaos-mesh/pkg/debug/networkchaos"
"github.com/chaos-mesh/chaos-mesh/pkg/debug/stresschaos"
)
type DebugOptions struct {
ChaosName string
Namespace string
}
func init() {
o := &DebugOptions{}
validArgs := []string{"networkchaos", "stresschaos", "iochaos"}
c, err := cm.InitClientSet()
if err != nil {
log.Fatal(err)
}
// debugCmd represents the debug command
debugCmd := &cobra.Command{
Use: `debug (CHAOSTYPE) [-c CHAOSNAME] [-n NAMESPACE]`,
Short: `Print the debug information for certain chaos`,
Long: `Print the debug information for certain chaos.
Currently only support networkchaos and stresschaos.
Examples:
# Return debug information from all networkchaos
chaosctl debug networkchaos
# Return debug information from certain networkchaos
chaosctl debug networkchaos -c web-show-network-delay -n chaos-testing`,
Run: func(cmd *cobra.Command, args []string) {
if err := o.Run(args, c); err != nil {
log.Fatal(err)
}
},
ValidArgs: validArgs,
}
debugCmd.Flags().StringVarP(&o.ChaosName, "chaosname", "c", "", "certain chaos name")
debugCmd.Flags().StringVarP(&o.Namespace, "namespace", "n", "default", "namespace to find chaos")
if err := flagCompletion(debugCmd, c.K8sClient); err != nil {
log.Fatal(err)
}
rootCmd.AddCommand(debugCmd)
}
func (o *DebugOptions) Run(args []string, c *cm.ClientSet) error {
if len(args) == 0 {
return fmt.Errorf("The type of chaos need to be specified")
}
if len(args) > 1 {
return fmt.Errorf("Only one type of chaos need to be specified")
}
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
chaosType := strings.ToLower(args[0])
chaosList, err := cm.GetChaosList(ctx, chaosType, o.ChaosName, o.Namespace, c.CtrlClient)
if err != nil {
return fmt.Errorf(err.Error())
}
for _, chaosName := range chaosList {
cm.Print("[CHAOSNAME]: "+chaosName, 0, cm.ColorBlue)
chaos, err := cm.GetChaos(ctx, chaosType, chaosName, o.Namespace, c.CtrlClient)
if err != nil {
return fmt.Errorf("failed to get chaos %s: %s", chaosName, err.Error())
}
switch chaosType {
case "networkchaos":
if err := networkchaos.Debug(ctx, chaos, c); err != nil {
return err
}
case "stresschaos":
if err := stresschaos.Debug(ctx, chaos, c); err != nil {
return err
}
case "iochaos":
if err := iochaos.Debug(ctx, chaos, c); err != nil {
return err
}
default:
return fmt.Errorf("chaos not supported")
}
}
return nil
}
func flagCompletion(cmd *cobra.Command, c *kubernetes.Clientset) error {
err := cmd.RegisterFlagCompletionFunc("namespace", func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
return listNameSpace(toComplete, c)
})
if err != nil {
return err
}
return nil
}
func listNameSpace(toComplete string, c *kubernetes.Clientset) ([]string, cobra.ShellCompDirective) {
namespaces, err := c.CoreV1().Namespaces().List(v1.ListOptions{})
if err != nil {
return nil, cobra.ShellCompDirectiveDefault
}
var ret []string
for _, ns := range namespaces.Items {
if strings.HasPrefix(ns.Name, toComplete) {
ret = append(ret, ns.Name)
}
}
return ret, cobra.ShellCompDirectiveNoFileComp
}