github.com/StackPointCloud/packer@v0.10.2-0.20180716202532-b28098e0f79b/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/hashicorp/packer/common"
    10  	"github.com/hashicorp/packer/helper/communicator"
    11  	"github.com/hashicorp/packer/helper/multistep"
    12  	"github.com/hashicorp/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  	return warnings, nil
    32  }
    33  
    34  // Run executes a googlecompute Packer build and returns a packer.Artifact
    35  // representing a GCE machine image.
    36  func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packer.Artifact, error) {
    37  	driver, err := NewDriverGCE(
    38  		ui, b.config.ProjectId, &b.config.Account)
    39  	if err != nil {
    40  		return nil, err
    41  	}
    42  
    43  	// Set up the state.
    44  	state := new(multistep.BasicStateBag)
    45  	state.Put("config", b.config)
    46  	state.Put("driver", driver)
    47  	state.Put("hook", hook)
    48  	state.Put("ui", ui)
    49  
    50  	// Build the steps.
    51  	steps := []multistep.Step{
    52  		new(StepCheckExistingImage),
    53  		&StepCreateSSHKey{
    54  			Debug:          b.config.PackerDebug,
    55  			DebugKeyPath:   fmt.Sprintf("gce_%s.pem", b.config.PackerBuildName),
    56  			PrivateKeyFile: b.config.Comm.SSHPrivateKey,
    57  		},
    58  		&StepCreateInstance{
    59  			Debug: b.config.PackerDebug,
    60  		},
    61  		&StepCreateWindowsPassword{
    62  			Debug:        b.config.PackerDebug,
    63  			DebugKeyPath: fmt.Sprintf("gce_windows_%s.pem", b.config.PackerBuildName),
    64  		},
    65  		&StepInstanceInfo{
    66  			Debug: b.config.PackerDebug,
    67  		},
    68  		&communicator.StepConnect{
    69  			Config:      &b.config.Comm,
    70  			Host:        commHost,
    71  			SSHConfig:   sshConfig,
    72  			WinRMConfig: winrmConfig,
    73  		},
    74  		new(common.StepProvision),
    75  	}
    76  	if _, exists := b.config.Metadata[StartupScriptKey]; exists || b.config.StartupScriptFile != "" {
    77  		steps = append(steps, new(StepWaitStartupScript))
    78  	}
    79  	steps = append(steps, new(StepTeardownInstance), new(StepCreateImage))
    80  
    81  	// Run the steps.
    82  	b.runner = common.NewRunner(steps, b.config.PackerConfig, ui)
    83  	b.runner.Run(state)
    84  
    85  	// Report any errors.
    86  	if rawErr, ok := state.GetOk("error"); ok {
    87  		return nil, rawErr.(error)
    88  	}
    89  	if _, ok := state.GetOk("image"); !ok {
    90  		log.Println("Failed to find image in state. Bug?")
    91  		return nil, nil
    92  	}
    93  
    94  	artifact := &Artifact{
    95  		image:  state.Get("image").(*Image),
    96  		driver: driver,
    97  		config: b.config,
    98  	}
    99  	return artifact, nil
   100  }
   101  
   102  // Cancel.
   103  func (b *Builder) Cancel() {
   104  	if b.runner != nil {
   105  		log.Println("Cancelling the step runner...")
   106  		b.runner.Cancel()
   107  	}
   108  }