github.com/fafucoder/cilium@v1.6.11/cilium/cmd/fqdn.go (about)

     1  // Copyright 2019 Authors of Cilium
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package cmd
    16  
    17  import (
    18  	"fmt"
    19  	"os"
    20  	"strings"
    21  	"text/tabwriter"
    22  
    23  	"github.com/spf13/cobra"
    24  
    25  	"github.com/cilium/cilium/api/v1/client/policy"
    26  	"github.com/cilium/cilium/api/v1/models"
    27  	"github.com/cilium/cilium/pkg/command"
    28  )
    29  
    30  var fqdnCmd = &cobra.Command{
    31  	Use:   "fqdn",
    32  	Short: "Manage fqdn proxy",
    33  	Run: func(cmd *cobra.Command, args []string) {
    34  		cmd.Help()
    35  	},
    36  }
    37  
    38  var fqdnCacheCmd = &cobra.Command{
    39  	Use:   "cache",
    40  	Short: "Manage fqdn proxy cache",
    41  	Run: func(cmd *cobra.Command, args []string) {
    42  		cmd.Help()
    43  	},
    44  }
    45  
    46  var fqdnCleanCacheCmd = &cobra.Command{
    47  	Use:   "clean",
    48  	Short: "Clean fqdn cache",
    49  	Run: func(cmd *cobra.Command, args []string) {
    50  		cleanFQDNCache()
    51  	},
    52  }
    53  
    54  var fqdnListCacheCmd = &cobra.Command{
    55  	Use:   "list",
    56  	Short: "List fqdn cache contents",
    57  	Run: func(cmd *cobra.Command, args []string) {
    58  		listFQDNCache()
    59  	},
    60  }
    61  
    62  var fqdnCacheMatchPattern string
    63  
    64  func init() {
    65  	fqdnCacheCmd.AddCommand(fqdnListCacheCmd)
    66  	fqdnCacheCmd.AddCommand(fqdnCleanCacheCmd)
    67  	fqdnCmd.AddCommand(fqdnCacheCmd)
    68  	rootCmd.AddCommand(fqdnCmd)
    69  
    70  	fqdnCleanCacheCmd.Flags().BoolVarP(&force, "force", "f", false, "Skip confirmation")
    71  	fqdnCleanCacheCmd.Flags().StringVarP(&fqdnCacheMatchPattern, "matchpattern", "p", "", "Delete cache entries with FQDNs that match matchpattern")
    72  
    73  	fqdnListCacheCmd.Flags().StringVarP(&fqdnCacheMatchPattern, "matchpattern", "p", "", "List cache entries with FQDN that match matchpattern")
    74  	command.AddJSONOutput(fqdnListCacheCmd)
    75  }
    76  
    77  func cleanFQDNCache() {
    78  	if !force {
    79  		fmt.Println("Following cache entries are going to be deleted:")
    80  		listFQDNCache()
    81  		if !confirmCleanup() {
    82  			return
    83  		}
    84  	}
    85  
    86  	params := policy.NewDeleteFqdnCacheParams()
    87  
    88  	if fqdnCacheMatchPattern != "" {
    89  		params.SetMatchpattern(&fqdnCacheMatchPattern)
    90  	}
    91  
    92  	_, err := client.Policy.DeleteFqdnCache(params)
    93  	if err != nil {
    94  		Fatalf("Error: %s\n", err)
    95  	}
    96  	fmt.Println("FQDN proxy cache cleared")
    97  }
    98  
    99  func listFQDNCache() {
   100  	params := policy.NewGetFqdnCacheParams()
   101  
   102  	if fqdnCacheMatchPattern != "" {
   103  		params.SetMatchpattern(&fqdnCacheMatchPattern)
   104  	}
   105  
   106  	var lookups []*models.DNSLookup = []*models.DNSLookup{}
   107  
   108  	result, err := client.Policy.GetFqdnCache(params)
   109  	if err != nil {
   110  		switch err := err.(type) {
   111  		case *policy.GetFqdnCacheNotFound:
   112  			// print out empty lookups slice
   113  		default:
   114  			Fatalf("Error: %s\n", err)
   115  		}
   116  	} else {
   117  		lookups = result.Payload
   118  	}
   119  
   120  	if command.OutputJSON() {
   121  		if err := command.PrintOutput(lookups); err != nil {
   122  			Fatalf("Unable to provide JSON output: %s", err)
   123  		}
   124  		return
   125  	}
   126  
   127  	w := tabwriter.NewWriter(os.Stdout, 5, 0, 3, ' ', 0)
   128  	fmt.Fprintln(w, "Endpoint\tFQDN\tTTL\tExpirationTime\tIPs\t")
   129  	for _, lookup := range lookups {
   130  		fmt.Fprintf(w, "%d\t%s\t%d\t%s\t%s\t\n",
   131  			lookup.EndpointID,
   132  			lookup.Fqdn,
   133  			lookup.TTL,
   134  			lookup.ExpirationTime.String(),
   135  			strings.Join(lookup.Ips, ","))
   136  	}
   137  	w.Flush()
   138  }