github.com/amanya/packer@v0.12.1-0.20161117214323-902ac5ab2eb6/builder/googlecompute/builder.go (about)

     1  // The googlecompute package contains a packer.Builder implementation that
     2  // builds images for Google Compute Engine.
     3  package googlecompute
     4  
     5  import (
     6  	"fmt"
     7  	"log"
     8  
     9  	"github.com/mitchellh/multistep"
    10  	"github.com/mitchellh/packer/common"
    11  	"github.com/mitchellh/packer/helper/communicator"
    12  	"github.com/mitchellh/packer/packer"
    13  )
    14  
    15  // The unique ID for this builder.
    16  const BuilderId = "packer.googlecompute"
    17  
    18  // Builder represents a Packer Builder.
    19  type Builder struct {
    20  	config *Config
    21  	runner multistep.Runner
    22  }
    23  
    24  // Prepare processes the build configuration parameters.
    25  func (b *Builder) Prepare(raws ...interface{}) ([]string, error) {
    26  	c, warnings, errs := NewConfig(raws...)
    27  	if errs != nil {
    28  		return warnings, errs
    29  	}
    30  	b.config = c
    31  
    32  	return warnings, nil
    33  }
    34  
    35  // Run executes a googlecompute Packer build and returns a packer.Artifact
    36  // representing a GCE machine image.
    37  func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packer.Artifact, error) {
    38  	driver, err := NewDriverGCE(
    39  		ui, b.config.ProjectId, &b.config.Account)
    40  	if err != nil {
    41  		return nil, err
    42  	}
    43  
    44  	// Set up the state.
    45  	state := new(multistep.BasicStateBag)
    46  	state.Put("config", b.config)
    47  	state.Put("driver", driver)
    48  	state.Put("hook", hook)
    49  	state.Put("ui", ui)
    50  
    51  	// Build the steps.
    52  	steps := []multistep.Step{
    53  		new(StepCheckExistingImage),
    54  		&StepCreateSSHKey{
    55  			Debug:          b.config.PackerDebug,
    56  			DebugKeyPath:   fmt.Sprintf("gce_%s.pem", b.config.PackerBuildName),
    57  			PrivateKeyFile: b.config.Comm.SSHPrivateKey,
    58  		},
    59  		&StepCreateInstance{
    60  			Debug: b.config.PackerDebug,
    61  		},
    62  		&StepCreateWindowsPassword{
    63  			Debug:        b.config.PackerDebug,
    64  			DebugKeyPath: fmt.Sprintf("gce_windows_%s.pem", b.config.PackerBuildName),
    65  		},
    66  		&StepInstanceInfo{
    67  			Debug: b.config.PackerDebug,
    68  		},
    69  		&communicator.StepConnect{
    70  			Config:      &b.config.Comm,
    71  			Host:        commHost,
    72  			SSHConfig:   sshConfig,
    73  			WinRMConfig: winrmConfig,
    74  		},
    75  		new(common.StepProvision),
    76  	}
    77  	if _, exists := b.config.Metadata[StartupScriptKey]; exists || b.config.StartupScriptFile != "" {
    78  		steps = append(steps, new(StepWaitStartupScript))
    79  	}
    80  	steps = append(steps, new(StepTeardownInstance), new(StepCreateImage))
    81  
    82  	// Run the steps.
    83  	b.runner = common.NewRunner(steps, b.config.PackerConfig, ui)
    84  	b.runner.Run(state)
    85  
    86  	// Report any errors.
    87  	if rawErr, ok := state.GetOk("error"); ok {
    88  		return nil, rawErr.(error)
    89  	}
    90  	if _, ok := state.GetOk("image"); !ok {
    91  		log.Println("Failed to find image in state. Bug?")
    92  		return nil, nil
    93  	}
    94  
    95  	artifact := &Artifact{
    96  		image:  state.Get("image").(*Image),
    97  		driver: driver,
    98  		config: b.config,
    99  	}
   100  	return artifact, nil
   101  }
   102  
   103  // Cancel.
   104  func (b *Builder) Cancel() {
   105  	if b.runner != nil {
   106  		log.Println("Cancelling the step runner...")
   107  		b.runner.Cancel()
   108  	}
   109  }