packer-cn/builder/amazon/ebs/builder.go

168 lines
4.5 KiB
Go

// The amazonebs package contains a packer.Builder implementation that
// builds AMIs for Amazon EC2.
//
// In general, there are two types of AMIs that can be created: ebs-backed or
// instance-store. This builder _only_ builds ebs-backed images.
package ebs
import (
"fmt"
"github.com/mitchellh/goamz/ec2"
"github.com/mitchellh/multistep"
awscommon "github.com/mitchellh/packer/builder/amazon/common"
"github.com/mitchellh/packer/common"
"github.com/mitchellh/packer/packer"
"log"
)
// The unique ID for this builder
const BuilderId = "mitchellh.amazonebs"
type config struct {
common.PackerConfig `mapstructure:",squash"`
awscommon.AccessConfig `mapstructure:",squash"`
awscommon.AMIConfig `mapstructure:",squash"`
awscommon.BlockDevices `mapstructure:",squash"`
awscommon.RunConfig `mapstructure:",squash"`
tpl *packer.ConfigTemplate
}
type Builder struct {
config config
runner multistep.Runner
}
func (b *Builder) Prepare(raws ...interface{}) ([]string, error) {
md, err := common.DecodeConfig(&b.config, raws...)
if err != nil {
return nil, err
}
b.config.tpl, err = packer.NewConfigTemplate()
if err != nil {
return nil, err
}
b.config.tpl.UserVars = b.config.PackerUserVars
b.config.tpl.Funcs(awscommon.TemplateFuncs)
// Accumulate any errors
errs := common.CheckUnusedConfig(md)
errs = packer.MultiErrorAppend(errs, b.config.AccessConfig.Prepare(b.config.tpl)...)
errs = packer.MultiErrorAppend(errs, b.config.AMIConfig.Prepare(b.config.tpl)...)
errs = packer.MultiErrorAppend(errs, b.config.RunConfig.Prepare(b.config.tpl)...)
if errs != nil && len(errs.Errors) > 0 {
return nil, errs
}
log.Println(common.ScrubConfig(b.config, b.config.AccessKey, b.config.SecretKey))
return nil, nil
}
func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packer.Artifact, error) {
region, err := b.config.Region()
if err != nil {
return nil, err
}
auth, err := b.config.AccessConfig.Auth()
if err != nil {
return nil, err
}
ec2conn := ec2.New(auth, region)
// Setup the state bag and initial state for the steps
state := new(multistep.BasicStateBag)
state.Put("config", b.config)
state.Put("ec2", ec2conn)
state.Put("hook", hook)
state.Put("ui", ui)
// Build the steps
steps := []multistep.Step{
&awscommon.StepKeyPair{
Debug: b.config.PackerDebug,
DebugKeyPath: fmt.Sprintf("ec2_%s.pem", b.config.PackerBuildName),
KeyPairName: b.config.TemporaryKeyPairName,
},
&awscommon.StepSecurityGroup{
SecurityGroupIds: b.config.SecurityGroupIds,
SSHPort: b.config.SSHPort,
VpcId: b.config.VpcId,
},
&awscommon.StepRunSourceInstance{
Debug: b.config.PackerDebug,
ExpectedRootDevice: "ebs",
InstanceType: b.config.InstanceType,
UserData: b.config.UserData,
UserDataFile: b.config.UserDataFile,
SourceAMI: b.config.SourceAmi,
IamInstanceProfile: b.config.IamInstanceProfile,
SubnetId: b.config.SubnetId,
AssociatePublicIpAddress: b.config.AssociatePublicIpAddress,
AvailabilityZone: b.config.AvailabilityZone,
BlockDevices: b.config.BlockDevices,
Tags: b.config.RunTags,
},
&common.StepConnectSSH{
SSHAddress: awscommon.SSHAddress(ec2conn, b.config.SSHPort),
SSHConfig: awscommon.SSHConfig(b.config.SSHUsername),
SSHWaitTimeout: b.config.SSHTimeout(),
},
&common.StepProvision{},
&stepStopInstance{},
&stepCreateAMI{},
&awscommon.StepAMIRegionCopy{
Regions: b.config.AMIRegions,
},
&awscommon.StepModifyAMIAttributes{
Description: b.config.AMIDescription,
Users: b.config.AMIUsers,
Groups: b.config.AMIGroups,
},
&awscommon.StepCreateTags{
Tags: b.config.AMITags,
},
}
// Run!
if b.config.PackerDebug {
b.runner = &multistep.DebugRunner{
Steps: steps,
PauseFn: common.MultistepDebugFn(ui),
}
} else {
b.runner = &multistep.BasicRunner{Steps: steps}
}
b.runner.Run(state)
// If there was an error, return that
if rawErr, ok := state.GetOk("error"); ok {
return nil, rawErr.(error)
}
// If there are no AMIs, then just return
if _, ok := state.GetOk("amis"); !ok {
return nil, nil
}
// Build the artifact and return it
artifact := &awscommon.Artifact{
Amis: state.Get("amis").(map[string]string),
BuilderIdValue: BuilderId,
Conn: ec2conn,
}
return artifact, nil
}
func (b *Builder) Cancel() {
if b.runner != nil {
log.Println("Cancelling the step runner...")
b.runner.Cancel()
}
}