github.com/1aal/kubeblocks@v0.0.0-20231107070852-e1c03e598921/pkg/cli/cmd/fault/fault_dns.go (about)

     1  /*
     2  Copyright (C) 2022-2023 ApeCloud Co., Ltd
     3  
     4  This file is part of KubeBlocks project
     5  
     6  This program is free software: you can redistribute it and/or modify
     7  it under the terms of the GNU Affero General Public License as published by
     8  the Free Software Foundation, either version 3 of the License, or
     9  (at your option) any later version.
    10  
    11  This program is distributed in the hope that it will be useful
    12  but WITHOUT ANY WARRANTY; without even the implied warranty of
    13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    14  GNU Affero General Public License for more details.
    15  
    16  You should have received a copy of the GNU Affero General Public License
    17  along with this program.  If not, see <http://www.gnu.org/licenses/>.
    18  */
    19  
    20  package fault
    21  
    22  import (
    23  	"github.com/chaos-mesh/chaos-mesh/api/v1alpha1"
    24  	"github.com/spf13/cobra"
    25  	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
    26  	"k8s.io/apimachinery/pkg/runtime"
    27  	"k8s.io/cli-runtime/pkg/genericiooptions"
    28  	cmdutil "k8s.io/kubectl/pkg/cmd/util"
    29  	"k8s.io/kubectl/pkg/util/templates"
    30  
    31  	"github.com/1aal/kubeblocks/pkg/cli/create"
    32  	"github.com/1aal/kubeblocks/pkg/cli/util"
    33  )
    34  
    35  var faultDNSExample = templates.Examples(`
    36  	// Inject DNS faults into all pods under the default namespace, so that any IP is returned when accessing the bing.com domain name.
    37  	kbcli fault dns random --patterns=bing.com --duration=1m
    38  
    39  	// Inject DNS faults into all pods under the default namespace, so that error is returned when accessing the bing.com domain name.
    40  	kbcli fault dns error --patterns=bing.com --duration=1m
    41  `)
    42  
    43  type DNSChaosOptions struct {
    44  	Patterns []string `json:"patterns"`
    45  
    46  	FaultBaseOptions
    47  }
    48  
    49  func NewDNSChaosOptions(f cmdutil.Factory, streams genericiooptions.IOStreams, action string) *DNSChaosOptions {
    50  	o := &DNSChaosOptions{
    51  		FaultBaseOptions: FaultBaseOptions{
    52  			CreateOptions: create.CreateOptions{
    53  				Factory:         f,
    54  				IOStreams:       streams,
    55  				CueTemplateName: CueTemplateDNSChaos,
    56  				GVR:             GetGVR(Group, Version, ResourceDNSChaos),
    57  			},
    58  			Action: action,
    59  		},
    60  	}
    61  	o.CreateOptions.PreCreate = o.PreCreate
    62  	o.CreateOptions.Options = o
    63  	return o
    64  }
    65  
    66  func NewDNSChaosCmd(f cmdutil.Factory, streams genericiooptions.IOStreams) *cobra.Command {
    67  	cmd := &cobra.Command{
    68  		Use:   "dns",
    69  		Short: "Inject faults into DNS server.",
    70  	}
    71  	cmd.AddCommand(
    72  		NewRandomCmd(f, streams),
    73  		NewErrorCmd(f, streams),
    74  	)
    75  	return cmd
    76  }
    77  
    78  func NewRandomCmd(f cmdutil.Factory, streams genericiooptions.IOStreams) *cobra.Command {
    79  	o := NewDNSChaosOptions(f, streams, string(v1alpha1.RandomAction))
    80  	cmd := o.NewCobraCommand(Random, RandomShort)
    81  
    82  	o.AddCommonFlag(cmd)
    83  	util.CheckErr(cmd.MarkFlagRequired("patterns"))
    84  
    85  	return cmd
    86  }
    87  
    88  func NewErrorCmd(f cmdutil.Factory, streams genericiooptions.IOStreams) *cobra.Command {
    89  	o := NewDNSChaosOptions(f, streams, string(v1alpha1.ErrorAction))
    90  	cmd := o.NewCobraCommand(Error, ErrorShort)
    91  
    92  	o.AddCommonFlag(cmd)
    93  	util.CheckErr(cmd.MarkFlagRequired("patterns"))
    94  
    95  	return cmd
    96  }
    97  
    98  func (o *DNSChaosOptions) NewCobraCommand(use, short string) *cobra.Command {
    99  	return &cobra.Command{
   100  		Use:     use,
   101  		Short:   short,
   102  		Example: faultDNSExample,
   103  		Run: func(cmd *cobra.Command, args []string) {
   104  			o.Args = args
   105  			cmdutil.CheckErr(o.CreateOptions.Complete())
   106  			cmdutil.CheckErr(o.Validate())
   107  			cmdutil.CheckErr(o.Complete())
   108  			cmdutil.CheckErr(o.Run())
   109  		},
   110  	}
   111  }
   112  
   113  func (o *DNSChaosOptions) AddCommonFlag(cmd *cobra.Command) {
   114  	o.FaultBaseOptions.AddCommonFlag(cmd)
   115  
   116  	cmd.Flags().StringArrayVar(&o.Patterns, "patterns", nil, `Select the domain name template that matching the failure behavior & supporting placeholders ? and wildcards *.`)
   117  
   118  	// register flag completion func
   119  	registerFlagCompletionFunc(cmd, o.Factory)
   120  }
   121  
   122  func (o *DNSChaosOptions) Validate() error {
   123  	return o.BaseValidate()
   124  }
   125  
   126  func (o *DNSChaosOptions) Complete() error {
   127  	return o.BaseComplete()
   128  }
   129  
   130  func (o *DNSChaosOptions) PreCreate(obj *unstructured.Unstructured) error {
   131  	c := &v1alpha1.DNSChaos{}
   132  	if err := runtime.DefaultUnstructuredConverter.FromUnstructured(obj.Object, c); err != nil {
   133  		return err
   134  	}
   135  
   136  	data, e := runtime.DefaultUnstructuredConverter.ToUnstructured(c)
   137  	if e != nil {
   138  		return e
   139  	}
   140  	obj.SetUnstructuredContent(data)
   141  	return nil
   142  }