github.com/coreos/mantle@v0.13.0/cmd/kola/bootchart.go (about)

     1  // Copyright 2015 CoreOS, Inc.
     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  	"fmt"
    19  	"os"
    20  
    21  	"github.com/spf13/cobra"
    22  
    23  	"github.com/coreos/mantle/kola"
    24  	"github.com/coreos/mantle/platform"
    25  )
    26  
    27  var cmdBootchart = &cobra.Command{
    28  	Run:    runBootchart,
    29  	PreRun: preRun,
    30  	Use:    "bootchart > bootchart.svg",
    31  	Short:  "Boot performance graphing tool",
    32  	Long: `
    33  Boot a single instance and plot how the time was spent.
    34  
    35  Note that this actually uses systemd-analyze plot rather than
    36  systemd-bootchart since the latter requires setting a different
    37  init process.
    38  
    39  This must run as root!
    40  `}
    41  
    42  func init() {
    43  	root.AddCommand(cmdBootchart)
    44  }
    45  
    46  func runBootchart(cmd *cobra.Command, args []string) {
    47  	if len(args) != 0 {
    48  		fmt.Fprintf(os.Stderr, "No args accepted\n")
    49  		os.Exit(2)
    50  	}
    51  
    52  	var err error
    53  	outputDir, err = kola.SetupOutputDir(outputDir, kolaPlatform)
    54  	if err != nil {
    55  		fmt.Fprintf(os.Stderr, "Setup failed: %v\n", err)
    56  		os.Exit(1)
    57  	}
    58  
    59  	flight, err := kola.NewFlight(kolaPlatform)
    60  	if err != nil {
    61  		fmt.Fprintf(os.Stderr, "Flight failed: %v\n", err)
    62  		os.Exit(1)
    63  	}
    64  	defer flight.Destroy()
    65  
    66  	cluster, err := flight.NewCluster(&platform.RuntimeConfig{
    67  		OutputDir: outputDir,
    68  	})
    69  	if err != nil {
    70  		fmt.Fprintf(os.Stderr, "Cluster failed: %v\n", err)
    71  		os.Exit(1)
    72  	}
    73  	defer cluster.Destroy()
    74  
    75  	m, err := cluster.NewMachine(nil)
    76  	if err != nil {
    77  		fmt.Fprintf(os.Stderr, "Machine failed: %v\n", err)
    78  		os.Exit(1)
    79  	}
    80  	defer m.Destroy()
    81  
    82  	out, stderr, err := m.SSH("systemd-analyze plot")
    83  	if err != nil {
    84  		fmt.Fprintf(os.Stderr, "SSH failed: %v: %s\n", err, stderr)
    85  		os.Exit(1)
    86  	}
    87  
    88  	fmt.Printf("%s", out)
    89  }