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