chroot

package
v0.3.9 Latest Latest
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 Go to latest Published: Oct 2, 2013 License: MPL-2.0 Imports: 18 Imported by: 0

Documentation

Overview

The chroot package is able to create an Amazon AMI without requiring the launch of a new instance for every build. It does this by attaching and mounting the root volume of another AMI and chrooting into that directory. It then creates an AMI from that attached drive.

Index

Constants

View Source 
const BuilderId = "mitchellh.amazon.chroot"

The unique ID for this builder

View Source 
const LOCK_EX = 2

See: http://linux.die.net/include/sys/file.h

View Source 
const LOCK_NB = 4
View Source 
const LOCK_UN = 8

Variables

This section is empty.

Functions

func AvailableDevice 

func AvailableDevice() (string, error)

AvailableDevice finds an available device and returns it. Note that you should externally hold a flock or something in order to guarantee that this device is available across processes.

func ShellCommand 

func ShellCommand(command string) *exec.Cmd

ShellCommand takes a command string and returns an *exec.Cmd to execute it within the context of a shell (/bin/sh).

Types

type Builder 

type Builder struct {
	// contains filtered or unexported fields
}

func (*Builder) Cancel 

func (b *Builder) Cancel()

func (*Builder) Prepare 

func (b *Builder) Prepare(raws ...interface{}) error

func (*Builder) Run 

func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packer.Artifact, error)

type Cleanup 

type Cleanup interface {
	CleanupFunc(multistep.StateBag) error
}

Cleanup is an interface that some steps implement for early cleanup.

type CommandWrapper 

type CommandWrapper func(string) (string, error)

CommandWrapper is a type that given a command, will possibly modify that command in-flight. This might return an error.

type Communicator 

type Communicator struct {
	Chroot     string
	CmdWrapper CommandWrapper
}

Communicator is a special communicator that works by executing commands locally but within a chroot.

func (*Communicator) Download 

func (c *Communicator) Download(src string, w io.Writer) error

func (*Communicator) Start 

func (c *Communicator) Start(cmd *packer.RemoteCmd) error

func (*Communicator) Upload 

func (c *Communicator) Upload(dst string, r io.Reader) error

func (*Communicator) UploadDir 

func (c *Communicator) UploadDir(dst string, src string, exclude []string) error

type Config 

type Config struct {
	common.PackerConfig    `mapstructure:",squash"`
	awscommon.AccessConfig `mapstructure:",squash"`
	awscommon.AMIConfig    `mapstructure:",squash"`

	ChrootMounts   [][]string `mapstructure:"chroot_mounts"`
	CommandWrapper string     `mapstructure:"command_wrapper"`
	CopyFiles      []string   `mapstructure:"copy_files"`
	DevicePath     string     `mapstructure:"device_path"`
	MountPath      string     `mapstructure:"mount_path"`
	SourceAmi      string     `mapstructure:"source_ami"`
	// contains filtered or unexported fields
}

Config is the configuration that is chained through the steps and settable from the template.

type StepAttachVolume 

type StepAttachVolume struct {
	// contains filtered or unexported fields
}

StepAttachVolume attaches the previously created volume to an available device location.

Produces: 

device string - The location where the volume was attached.
attach_cleanup CleanupFunc

func (*StepAttachVolume) Cleanup 

func (s *StepAttachVolume) Cleanup(state multistep.StateBag)

func (*StepAttachVolume) CleanupFunc 

func (s *StepAttachVolume) CleanupFunc(state multistep.StateBag) error

func (*StepAttachVolume) Run 

func (s *StepAttachVolume) Run(state multistep.StateBag) multistep.StepAction

type StepChrootProvision 

type StepChrootProvision struct {
	// contains filtered or unexported fields
}

StepChrootProvision provisions the instance within a chroot.

func (*StepChrootProvision) Cleanup 

func (s *StepChrootProvision) Cleanup(state multistep.StateBag)

func (*StepChrootProvision) Run 

func (s *StepChrootProvision) Run(state multistep.StateBag) multistep.StepAction

type StepCopyFiles 

type StepCopyFiles struct {
	// contains filtered or unexported fields
}

StepCopyFiles copies some files from the host into the chroot environment.

Produces: 

copy_files_cleanup CleanupFunc - A function to clean up the copied files
early.

func (*StepCopyFiles) Cleanup 

func (s *StepCopyFiles) Cleanup(state multistep.StateBag)

func (*StepCopyFiles) CleanupFunc 

func (s *StepCopyFiles) CleanupFunc(state multistep.StateBag) error

func (*StepCopyFiles) Run 

func (s *StepCopyFiles) Run(state multistep.StateBag) multistep.StepAction

type StepCreateVolume 

type StepCreateVolume struct {
	// contains filtered or unexported fields
}

StepCreateVolume creates a new volume from the snapshot of the root device of the AMI.

Produces: 

volume_id string - The ID of the created volume

func (*StepCreateVolume) Cleanup 

func (s *StepCreateVolume) Cleanup(state multistep.StateBag)

func (*StepCreateVolume) Run 

func (s *StepCreateVolume) Run(state multistep.StateBag) multistep.StepAction

type StepEarlyCleanup 

type StepEarlyCleanup struct{}

StepEarlyCleanup performs some of the cleanup steps early in order to prepare for snapshotting and creating an AMI.

func (*StepEarlyCleanup) Cleanup 

func (s *StepEarlyCleanup) Cleanup(state multistep.StateBag)

func (*StepEarlyCleanup) Run 

func (s *StepEarlyCleanup) Run(state multistep.StateBag) multistep.StepAction

type StepEarlyUnflock 

type StepEarlyUnflock struct{}

StepEarlyUnflock unlocks the flock.

func (*StepEarlyUnflock) Cleanup 

func (s *StepEarlyUnflock) Cleanup(state multistep.StateBag)

func (*StepEarlyUnflock) Run 

func (s *StepEarlyUnflock) Run(state multistep.StateBag) multistep.StepAction

type StepFlock 

type StepFlock struct {
	// contains filtered or unexported fields
}

StepFlock provisions the instance within a chroot.

Produces: 

flock_cleanup Cleanup - To perform early cleanup

func (*StepFlock) Cleanup 

func (s *StepFlock) Cleanup(state multistep.StateBag)

func (*StepFlock) CleanupFunc 

func (s *StepFlock) CleanupFunc(state multistep.StateBag) error

func (*StepFlock) Run 

func (s *StepFlock) Run(state multistep.StateBag) multistep.StepAction

type StepInstanceInfo 

type StepInstanceInfo struct{}

StepInstanceInfo verifies that this builder is running on an EC2 instance.

func (*StepInstanceInfo) Cleanup 

func (s *StepInstanceInfo) Cleanup(multistep.StateBag)

func (*StepInstanceInfo) Run 

func (s *StepInstanceInfo) Run(state multistep.StateBag) multistep.StepAction

type StepMountDevice 

type StepMountDevice struct {
	// contains filtered or unexported fields
}

StepMountDevice mounts the attached device.

Produces: 

mount_path string - The location where the volume was mounted.
mount_device_cleanup CleanupFunc - To perform early cleanup

func (*StepMountDevice) Cleanup 

func (s *StepMountDevice) Cleanup(state multistep.StateBag)

func (*StepMountDevice) CleanupFunc 

func (s *StepMountDevice) CleanupFunc(state multistep.StateBag) error

func (*StepMountDevice) Run 

func (s *StepMountDevice) Run(state multistep.StateBag) multistep.StepAction

type StepMountExtra 

type StepMountExtra struct {
	// contains filtered or unexported fields
}

StepMountExtra mounts the attached device.

Produces: 

mount_extra_cleanup CleanupFunc - To perform early cleanup

func (*StepMountExtra) Cleanup 

func (s *StepMountExtra) Cleanup(state multistep.StateBag)

func (*StepMountExtra) CleanupFunc 

func (s *StepMountExtra) CleanupFunc(state multistep.StateBag) error

func (*StepMountExtra) Run 

func (s *StepMountExtra) Run(state multistep.StateBag) multistep.StepAction

type StepPrepareDevice 

type StepPrepareDevice struct {
	// contains filtered or unexported fields
}

StepPrepareDevice finds an available device and sets it.

func (*StepPrepareDevice) Cleanup 

func (s *StepPrepareDevice) Cleanup(state multistep.StateBag)

func (*StepPrepareDevice) Run 

func (s *StepPrepareDevice) Run(state multistep.StateBag) multistep.StepAction

type StepRegisterAMI 

type StepRegisterAMI struct{}

StepRegisterAMI creates the AMI.

func (*StepRegisterAMI) Cleanup 

func (s *StepRegisterAMI) Cleanup(state multistep.StateBag)

func (*StepRegisterAMI) Run 

func (s *StepRegisterAMI) Run(state multistep.StateBag) multistep.StepAction

type StepSnapshot 

type StepSnapshot struct {
	// contains filtered or unexported fields
}

StepSnapshot creates a snapshot of the created volume.

Produces: 

snapshot_id string - ID of the created snapshot

func (*StepSnapshot) Cleanup 

func (s *StepSnapshot) Cleanup(state multistep.StateBag)

func (*StepSnapshot) Run 

func (s *StepSnapshot) Run(state multistep.StateBag) multistep.StepAction

type StepSourceAMIInfo 

type StepSourceAMIInfo struct{}

StepSourceAMIInfo extracts critical information from the source AMI that is used throughout the AMI creation process.

Produces: 

source_image *ec2.Image - the source AMI info

func (*StepSourceAMIInfo) Cleanup 

func (s *StepSourceAMIInfo) Cleanup(multistep.StateBag)

func (*StepSourceAMIInfo) Run 

func (s *StepSourceAMIInfo) Run(state multistep.StateBag) multistep.StepAction

Source Files

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