github.com/coreos/rocket@v1.30.1-0.20200224141603-171c416fac02/rkt/app_status.go (about)

     1  // Copyright 2016 The rkt Authors
     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 main
    16  
    17  import (
    18  	"encoding/json"
    19  	"fmt"
    20  	"strings"
    21  	"time"
    22  
    23  	"github.com/rkt/rkt/api/v1"
    24  	rkt "github.com/rkt/rkt/lib"
    25  	"github.com/spf13/cobra"
    26  )
    27  
    28  var (
    29  	cmdAppStatus = &cobra.Command{
    30  		Use:   "status UUID --app=APP_NAME [--format=json]",
    31  		Short: "Check the status of an app in the given pod",
    32  		Long:  "This will print detailed status of an app",
    33  		Run:   runWrapper(runAppStatus),
    34  	}
    35  )
    36  
    37  func init() {
    38  	cmdApp.AddCommand(cmdAppStatus)
    39  	cmdAppStatus.Flags().StringVar(&flagAppName, "app", "", "choose app within the pod, this flag must be set")
    40  	cmdAppStatus.Flags().Var(&flagFormat, "format", "choose the output format, allowed format includes 'json', 'json-pretty'. If empty, then the result is printed as key value pairs")
    41  }
    42  
    43  func printApp(app *v1.App) {
    44  	stdout.Printf("name=%s\n", app.Name)
    45  	stdout.Printf("state=%s\n", app.State)
    46  	stdout.Printf("image_id=%s\n", app.ImageID)
    47  	if app.CreatedAt != nil {
    48  		stdout.Printf("created_at=%v\n", time.Unix(0, *(app.CreatedAt)))
    49  	}
    50  	if app.StartedAt != nil {
    51  		stdout.Printf("started_at=%v\n", time.Unix(0, *(app.StartedAt)))
    52  	}
    53  	if app.FinishedAt != nil {
    54  		stdout.Printf("finished_at=%v\n", time.Unix(0, *(app.FinishedAt)))
    55  	}
    56  	if app.ExitCode != nil {
    57  		stdout.Printf("exit_code=%d\n", *(app.ExitCode))
    58  	}
    59  
    60  	if len(app.Mounts) > 0 {
    61  		stdout.Printf("mounts=")
    62  		var mnts []string
    63  		for _, mnt := range app.Mounts {
    64  			mnts = append(mnts, fmt.Sprintf("%s:%s:(read_only:%v)", mnt.HostPath, mnt.ContainerPath, mnt.ReadOnly))
    65  		}
    66  		stdout.Printf(strings.Join(mnts, ","))
    67  		stdout.Println()
    68  	}
    69  
    70  	if len(app.UserAnnotations) > 0 {
    71  		stdout.Printf("user_annotations=")
    72  		var annos []string
    73  		for key, value := range app.UserAnnotations {
    74  			annos = append(annos, fmt.Sprintf("%s:%s", key, value))
    75  		}
    76  		stdout.Printf(strings.Join(annos, ","))
    77  		stdout.Println()
    78  	}
    79  
    80  	if len(app.UserLabels) > 0 {
    81  		stdout.Printf("user_labels=")
    82  		var labels []string
    83  		for key, value := range app.UserLabels {
    84  			labels = append(labels, fmt.Sprintf("%s:%s", key, value))
    85  		}
    86  		stdout.Printf(strings.Join(labels, ","))
    87  		stdout.Println()
    88  	}
    89  }
    90  
    91  func runAppStatus(cmd *cobra.Command, args []string) (exit int) {
    92  	if len(args) != 1 || flagAppName == "" {
    93  		cmd.Usage()
    94  		return 1
    95  	}
    96  
    97  	apps, err := rkt.AppsForPod(args[0], getDataDir(), flagAppName)
    98  	if err != nil {
    99  		stderr.PrintE("error getting app status", err)
   100  		return 1
   101  	}
   102  
   103  	if len(apps) == 0 {
   104  		stderr.Error(fmt.Errorf("cannot find app %q in the pod", flagAppName))
   105  		return 1
   106  	}
   107  
   108  	// Must have only 1 app.
   109  	if len(apps) != 1 {
   110  		stderr.Error(fmt.Errorf("find more than one app with the name %q", flagAppName))
   111  		return 1
   112  	}
   113  
   114  	// TODO(yifan): Print yamls.
   115  	switch flagFormat {
   116  	case outputFormatJSON:
   117  		result, err := json.Marshal(apps[0])
   118  		if err != nil {
   119  			stderr.PrintE("error marshaling the app status", err)
   120  			return 1
   121  		}
   122  		stdout.Print(string(result))
   123  	case outputFormatPrettyJSON:
   124  		result, err := json.MarshalIndent(apps[0], "", "\t")
   125  		if err != nil {
   126  			stderr.PrintE("error marshaling the app status", err)
   127  			return 1
   128  		}
   129  		stdout.Print(string(result))
   130  	default:
   131  		printApp(apps[0])
   132  	}
   133  
   134  	return 0
   135  }