forked from hashicorp/packer
/
builder.go
302 lines (274 loc) · 10.3 KB
/
builder.go
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// The ebssurrogate package contains a packer.Builder implementation that
// builds a new EBS-backed AMI using an ephemeral instance.
package ebssurrogate
import (
"errors"
"fmt"
"log"
"github.com/aws/aws-sdk-go/service/ec2"
awscommon "github.com/hashicorp/packer/builder/amazon/common"
"github.com/hashicorp/packer/common"
"github.com/hashicorp/packer/helper/communicator"
"github.com/hashicorp/packer/helper/config"
"github.com/hashicorp/packer/helper/multistep"
"github.com/hashicorp/packer/packer"
"github.com/hashicorp/packer/template/interpolate"
)
const BuilderId = "mitchellh.amazon.ebssurrogate"
type Config struct {
common.PackerConfig `mapstructure:",squash"`
awscommon.AccessConfig `mapstructure:",squash"`
awscommon.RunConfig `mapstructure:",squash"`
awscommon.BlockDevices `mapstructure:",squash"`
awscommon.AMIConfig `mapstructure:",squash"`
RootDevice RootBlockDevice `mapstructure:"ami_root_device"`
VolumeRunTags awscommon.TagMap `mapstructure:"run_volume_tags"`
ctx interpolate.Context
}
type Builder struct {
config Config
runner multistep.Runner
}
func (b *Builder) Prepare(raws ...interface{}) ([]string, error) {
b.config.ctx.Funcs = awscommon.TemplateFuncs
err := config.Decode(&b.config, &config.DecodeOpts{
Interpolate: true,
InterpolateContext: &b.config.ctx,
InterpolateFilter: &interpolate.RenderFilter{
Exclude: []string{
"ami_description",
"run_tags",
"run_volume_tags",
"snapshot_tags",
"spot_tags",
"tags",
},
},
}, raws...)
if err != nil {
return nil, err
}
if b.config.PackerConfig.PackerForce {
b.config.AMIForceDeregister = true
}
// Accumulate any errors
var errs *packer.MultiError
errs = packer.MultiErrorAppend(errs, b.config.AccessConfig.Prepare(&b.config.ctx)...)
errs = packer.MultiErrorAppend(errs, b.config.RunConfig.Prepare(&b.config.ctx)...)
errs = packer.MultiErrorAppend(errs,
b.config.AMIConfig.Prepare(&b.config.AccessConfig, &b.config.ctx)...)
errs = packer.MultiErrorAppend(errs, b.config.BlockDevices.Prepare(&b.config.ctx)...)
errs = packer.MultiErrorAppend(errs, b.config.RootDevice.Prepare(&b.config.ctx)...)
if b.config.AMIVirtType == "" {
errs = packer.MultiErrorAppend(errs, errors.New("ami_virtualization_type is required."))
}
foundRootVolume := false
for _, launchDevice := range b.config.BlockDevices.LaunchMappings {
if launchDevice.DeviceName == b.config.RootDevice.SourceDeviceName {
foundRootVolume = true
}
}
if !foundRootVolume {
errs = packer.MultiErrorAppend(errs, fmt.Errorf("no volume with name '%s' is found", b.config.RootDevice.SourceDeviceName))
}
if b.config.IsSpotInstance() && ((b.config.AMIENASupport != nil && *b.config.AMIENASupport) || b.config.AMISriovNetSupport) {
errs = packer.MultiErrorAppend(errs,
fmt.Errorf("Spot instances do not support modification, which is required "+
"when either `ena_support` or `sriov_support` are set. Please ensure "+
"you use an AMI that already has either SR-IOV or ENA enabled."))
}
if errs != nil && len(errs.Errors) > 0 {
return nil, errs
}
packer.LogSecretFilter.Set(b.config.AccessKey, b.config.SecretKey, b.config.Token)
return nil, nil
}
func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packer.Artifact, error) {
session, err := b.config.Session()
if err != nil {
return nil, err
}
ec2conn := ec2.New(session)
// 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("awsSession", session)
state.Put("hook", hook)
state.Put("ui", ui)
var instanceStep multistep.Step
if b.config.IsSpotInstance() {
instanceStep = &awscommon.StepRunSpotInstance{
AssociatePublicIpAddress: b.config.AssociatePublicIpAddress,
BlockDevices: b.config.BlockDevices,
BlockDurationMinutes: b.config.BlockDurationMinutes,
Ctx: b.config.ctx,
Comm: &b.config.RunConfig.Comm,
Debug: b.config.PackerDebug,
EbsOptimized: b.config.EbsOptimized,
ExpectedRootDevice: "ebs",
IamInstanceProfile: b.config.IamInstanceProfile,
InstanceInitiatedShutdownBehavior: b.config.InstanceInitiatedShutdownBehavior,
InstanceType: b.config.InstanceType,
SourceAMI: b.config.SourceAmi,
SpotPrice: b.config.SpotPrice,
SpotPriceProduct: b.config.SpotPriceAutoProduct,
SpotTags: b.config.SpotTags,
Tags: b.config.RunTags,
UserData: b.config.UserData,
UserDataFile: b.config.UserDataFile,
VolumeTags: b.config.VolumeRunTags,
}
} else {
instanceStep = &awscommon.StepRunSourceInstance{
AssociatePublicIpAddress: b.config.AssociatePublicIpAddress,
BlockDevices: b.config.BlockDevices,
Comm: &b.config.RunConfig.Comm,
Ctx: b.config.ctx,
Debug: b.config.PackerDebug,
EbsOptimized: b.config.EbsOptimized,
EnableT2Unlimited: b.config.EnableT2Unlimited,
ExpectedRootDevice: "ebs",
IamInstanceProfile: b.config.IamInstanceProfile,
InstanceInitiatedShutdownBehavior: b.config.InstanceInitiatedShutdownBehavior,
InstanceType: b.config.InstanceType,
IsRestricted: b.config.IsChinaCloud() || b.config.IsGovCloud(),
SourceAMI: b.config.SourceAmi,
Tags: b.config.RunTags,
UserData: b.config.UserData,
UserDataFile: b.config.UserDataFile,
VolumeTags: b.config.VolumeRunTags,
}
}
amiDevices := b.config.BuildAMIDevices()
launchDevices := b.config.BuildLaunchDevices()
// Build the steps
steps := []multistep.Step{
&awscommon.StepPreValidate{
DestAmiName: b.config.AMIName,
ForceDeregister: b.config.AMIForceDeregister,
},
&awscommon.StepSourceAMIInfo{
SourceAmi: b.config.SourceAmi,
EnableAMISriovNetSupport: b.config.AMISriovNetSupport,
EnableAMIENASupport: b.config.AMIENASupport,
AmiFilters: b.config.SourceAmiFilter,
AMIVirtType: b.config.AMIVirtType,
},
&awscommon.StepNetworkInfo{
VpcId: b.config.VpcId,
VpcFilter: b.config.VpcFilter,
SecurityGroupIds: b.config.SecurityGroupIds,
SecurityGroupFilter: b.config.SecurityGroupFilter,
SubnetId: b.config.SubnetId,
SubnetFilter: b.config.SubnetFilter,
AvailabilityZone: b.config.AvailabilityZone,
},
&awscommon.StepKeyPair{
Debug: b.config.PackerDebug,
Comm: &b.config.RunConfig.Comm,
DebugKeyPath: fmt.Sprintf("ec2_%s.pem", b.config.PackerBuildName),
},
&awscommon.StepSecurityGroup{
SecurityGroupFilter: b.config.SecurityGroupFilter,
SecurityGroupIds: b.config.SecurityGroupIds,
CommConfig: &b.config.RunConfig.Comm,
TemporarySGSourceCidr: b.config.TemporarySGSourceCidr,
},
&awscommon.StepCleanupVolumes{
BlockDevices: b.config.BlockDevices,
},
instanceStep,
&awscommon.StepGetPassword{
Debug: b.config.PackerDebug,
Comm: &b.config.RunConfig.Comm,
Timeout: b.config.WindowsPasswordTimeout,
BuildName: b.config.PackerBuildName,
},
&communicator.StepConnect{
Config: &b.config.RunConfig.Comm,
Host: awscommon.SSHHost(
ec2conn,
b.config.Comm.SSHInterface),
SSHConfig: b.config.RunConfig.Comm.SSHConfigFunc(),
},
&common.StepProvision{},
&common.StepCleanupTempKeys{
Comm: &b.config.RunConfig.Comm,
},
&awscommon.StepStopEBSBackedInstance{
Skip: b.config.IsSpotInstance(),
DisableStopInstance: b.config.DisableStopInstance,
},
&awscommon.StepModifyEBSBackedInstance{
EnableAMISriovNetSupport: b.config.AMISriovNetSupport,
EnableAMIENASupport: b.config.AMIENASupport,
},
&StepSnapshotVolumes{
LaunchDevices: launchDevices,
},
&awscommon.StepDeregisterAMI{
AccessConfig: &b.config.AccessConfig,
ForceDeregister: b.config.AMIForceDeregister,
ForceDeleteSnapshot: b.config.AMIForceDeleteSnapshot,
AMIName: b.config.AMIName,
Regions: b.config.AMIRegions,
},
&StepRegisterAMI{
RootDevice: b.config.RootDevice,
AMIDevices: amiDevices,
LaunchDevices: launchDevices,
EnableAMISriovNetSupport: b.config.AMISriovNetSupport,
EnableAMIENASupport: b.config.AMIENASupport,
},
&awscommon.StepCreateEncryptedAMICopy{
KeyID: b.config.AMIKmsKeyId,
EncryptBootVolume: b.config.AMIEncryptBootVolume,
Name: b.config.AMIName,
},
&awscommon.StepAMIRegionCopy{
AccessConfig: &b.config.AccessConfig,
Regions: b.config.AMIRegions,
RegionKeyIds: b.config.AMIRegionKMSKeyIDs,
EncryptBootVolume: b.config.AMIEncryptBootVolume,
Name: b.config.AMIName,
},
&awscommon.StepModifyAMIAttributes{
Description: b.config.AMIDescription,
Users: b.config.AMIUsers,
Groups: b.config.AMIGroups,
ProductCodes: b.config.AMIProductCodes,
SnapshotUsers: b.config.SnapshotUsers,
SnapshotGroups: b.config.SnapshotGroups,
Ctx: b.config.ctx,
},
&awscommon.StepCreateTags{
Tags: b.config.AMITags,
SnapshotTags: b.config.SnapshotTags,
Ctx: b.config.ctx,
},
}
// Run!
b.runner = common.NewRunner(steps, b.config.PackerConfig, ui)
b.runner.Run(state)
// If there was an error, return that
if rawErr, ok := state.GetOk("error"); ok {
return nil, rawErr.(error)
}
if amis, ok := state.GetOk("amis"); ok {
// Build the artifact and return it
artifact := &awscommon.Artifact{
Amis: amis.(map[string]string),
BuilderIdValue: BuilderId,
Session: session,
}
return artifact, nil
}
return nil, nil
}
func (b *Builder) Cancel() {
if b.runner != nil {
log.Println("Cancelling the step runner...")
b.runner.Cancel()
}
}