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

     1  // Copyright 2018-2019 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  	"io"
    20  	"os"
    21  	"sort"
    22  	"text/tabwriter"
    23  
    24  	"github.com/cilium/cilium/api/v1/models"
    25  	pkg "github.com/cilium/cilium/pkg/client"
    26  	"github.com/cilium/cilium/pkg/command"
    27  
    28  	"github.com/spf13/cobra"
    29  )
    30  
    31  var nodeListCmd = &cobra.Command{
    32  	Use:     "list",
    33  	Aliases: []string{"ls"},
    34  	Short:   "List nodes",
    35  	Run: func(cmd *cobra.Command, args []string) {
    36  		resp, err := client.Daemon.GetClusterNodes(nil)
    37  		if err != nil {
    38  			fmt.Fprintf(os.Stderr, "%s\n", pkg.Hint(err))
    39  			os.Exit(1)
    40  		}
    41  
    42  		cluster := resp.Payload.NodesAdded
    43  		if cluster == nil {
    44  			return
    45  		}
    46  
    47  		if command.OutputJSON() {
    48  			if err := command.PrintOutput(cluster); err != nil {
    49  				os.Exit(1)
    50  			}
    51  		} else {
    52  			w := tabwriter.NewWriter(os.Stdout, 2, 0, 3, ' ', 0)
    53  			formatStatusResponse(w, cluster)
    54  			w.Flush()
    55  		}
    56  	},
    57  }
    58  
    59  func init() {
    60  	nodeCmd.AddCommand(nodeListCmd)
    61  	command.AddJSONOutput(nodeListCmd)
    62  }
    63  
    64  func formatStatusResponse(w io.Writer, nodes []*models.NodeElement) {
    65  	nodesOutput := []string{"Name\tIPv4 Address\tEndpoint CIDR\tIPv6 Address\tEndpoint CIDR\n"}
    66  
    67  	for _, node := range nodes {
    68  		ipv4, ipv4Range, ipv6, ipv6Range := "", "", "", ""
    69  		if node.PrimaryAddress != nil {
    70  			if node.PrimaryAddress.IPV4 != nil {
    71  				ipv4 = node.PrimaryAddress.IPV4.IP
    72  				ipv4Range = node.PrimaryAddress.IPV4.AllocRange
    73  			}
    74  			if node.PrimaryAddress.IPV6 != nil {
    75  				ipv6 = node.PrimaryAddress.IPV6.IP
    76  				ipv6Range = node.PrimaryAddress.IPV6.AllocRange
    77  			}
    78  		}
    79  
    80  		nodesOutput = append(nodesOutput, fmt.Sprintf("%s\t%s\t%s\t%s\t%s\n",
    81  			node.Name, ipv4, ipv4Range, ipv6, ipv6Range))
    82  	}
    83  
    84  	if len(nodesOutput) > 1 {
    85  		tab := tabwriter.NewWriter(w, 0, 0, 3, ' ', 0)
    86  		sort.Strings(nodesOutput)
    87  		for _, s := range nodesOutput {
    88  			fmt.Fprint(tab, s)
    89  		}
    90  		tab.Flush()
    91  	}
    92  }