363 lines
14 KiB
Go
363 lines
14 KiB
Go
//go:generate struct-markdown
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// 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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"context"
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"errors"
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"fmt"
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"github.com/aws/aws-sdk-go/service/ec2"
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"github.com/aws/aws-sdk-go/service/iam"
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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.AMIConfig `mapstructure:",squash"`
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// Add one or more block device mappings to the AMI. These will be attached
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// when booting a new instance from your AMI. To add a block device during
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// the Packer build see `launch_block_device_mappings` below. Your options
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// here may vary depending on the type of VM you use. See the
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// [BlockDevices](#block-devices-configuration) documentation for fields.
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AMIMappings awscommon.BlockDevices `mapstructure:"ami_block_device_mappings" required:"false"`
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// Add one or more block devices before the Packer build starts. If you add
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// instance store volumes or EBS volumes in addition to the root device
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// volume, the created AMI will contain block device mapping information
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// for those volumes. Amazon creates snapshots of the source instance's
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// root volume and any other EBS volumes described here. When you launch an
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// instance from this new AMI, the instance automatically launches with
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// these additional volumes, and will restore them from snapshots taken
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// from the source instance. See the
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// [BlockDevices](#block-devices-configuration) documentation for fields.
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LaunchMappings BlockDevices `mapstructure:"launch_block_device_mappings" required:"false"`
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// A block device mapping describing the root device of the AMI. This looks
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// like the mappings in `ami_block_device_mapping`, except with an
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// additional field:
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//
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// - `source_device_name` (string) - The device name of the block device on
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// the source instance to be used as the root device for the AMI. This
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// must correspond to a block device in `launch_block_device_mapping`.
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RootDevice RootBlockDevice `mapstructure:"ami_root_device" required:"true"`
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// Tags to apply to the volumes that are *launched* to create the AMI.
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// These tags are *not* applied to the resulting AMI unless they're
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// duplicated in `tags`. This is a [template
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// engine](/docs/templates/engine.html), see [Build template
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// data](#build-template-data) for more information.
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VolumeRunTags awscommon.TagMap `mapstructure:"run_volume_tags"`
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// what architecture to use when registering the
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// final AMI; valid options are "x86_64" or "arm64". Defaults to "x86_64".
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Architecture string `mapstructure:"ami_architecture" required:"false"`
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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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"spot_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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var warns []string
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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.AMIMappings.Prepare(&b.config.ctx)...)
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errs = packer.MultiErrorAppend(errs, b.config.LaunchMappings.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.LaunchMappings {
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if launchDevice.DeviceName == b.config.RootDevice.SourceDeviceName {
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foundRootVolume = true
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if launchDevice.OmitFromArtifact {
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errs = packer.MultiErrorAppend(errs, fmt.Errorf("You cannot set \"omit_from_artifact\": \"true\" for the root volume."))
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}
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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.RunConfig.SpotPriceAutoProduct != "" {
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warns = append(warns, "spot_price_auto_product is deprecated and no "+
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"longer necessary for Packer builds. In future versions of "+
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"Packer, inclusion of spot_price_auto_product will error your "+
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"builds. Please take a look at our current documentation to "+
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"understand how Packer requests Spot instances.")
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}
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if b.config.Architecture == "" {
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b.config.Architecture = "x86_64"
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}
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valid := false
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for _, validArch := range []string{"x86_64", "arm64"} {
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if validArch == b.config.Architecture {
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valid = true
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break
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}
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}
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if !valid {
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errs = packer.MultiErrorAppend(errs, errors.New(`The only valid ami_architecture values are "x86_64" and "arm64"`))
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}
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if errs != nil && len(errs.Errors) > 0 {
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return warns, errs
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}
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packer.LogSecretFilter.Set(b.config.AccessKey, b.config.SecretKey, b.config.Token)
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return warns, nil
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}
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func (b *Builder) Run(ctx context.Context, ui packer.Ui, hook packer.Hook) (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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iam := iam.New(session)
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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("access_config", &b.config.AccessConfig)
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state.Put("ami_config", &b.config.AMIConfig)
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state.Put("ec2", ec2conn)
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state.Put("iam", iam)
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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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LaunchMappings: b.config.LaunchMappings,
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BlockDurationMinutes: b.config.BlockDurationMinutes,
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Ctx: b.config.ctx,
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Comm: &b.config.RunConfig.Comm,
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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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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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SpotInstanceTypes: b.config.SpotInstanceTypes,
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SpotTags: b.config.SpotTags,
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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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LaunchMappings: b.config.LaunchMappings,
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Comm: &b.config.RunConfig.Comm,
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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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EnableT2Unlimited: b.config.EnableT2Unlimited,
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ExpectedRootDevice: "ebs",
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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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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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amiDevices := b.config.AMIMappings.BuildEC2BlockDeviceMappings()
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launchDevices := b.config.LaunchMappings.BuildEC2BlockDeviceMappings()
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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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VpcId: b.config.VpcId,
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SubnetId: b.config.SubnetId,
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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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AMIVirtType: b.config.AMIVirtType,
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},
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&awscommon.StepNetworkInfo{
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VpcId: b.config.VpcId,
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VpcFilter: b.config.VpcFilter,
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SecurityGroupIds: b.config.SecurityGroupIds,
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SecurityGroupFilter: b.config.SecurityGroupFilter,
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SubnetId: b.config.SubnetId,
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SubnetFilter: b.config.SubnetFilter,
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AvailabilityZone: b.config.AvailabilityZone,
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},
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&awscommon.StepKeyPair{
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Debug: b.config.PackerDebug,
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Comm: &b.config.RunConfig.Comm,
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DebugKeyPath: fmt.Sprintf("ec2_%s.pem", b.config.PackerBuildName),
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},
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&awscommon.StepSecurityGroup{
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SecurityGroupFilter: b.config.SecurityGroupFilter,
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SecurityGroupIds: b.config.SecurityGroupIds,
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CommConfig: &b.config.RunConfig.Comm,
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TemporarySGSourceCidrs: b.config.TemporarySGSourceCidrs,
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},
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&awscommon.StepIamInstanceProfile{
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IamInstanceProfile: b.config.IamInstanceProfile,
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SkipProfileValidation: b.config.SkipProfileValidation,
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TemporaryIamInstanceProfilePolicyDocument: b.config.TemporaryIamInstanceProfilePolicyDocument,
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},
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&awscommon.StepCleanupVolumes{
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LaunchMappings: b.config.LaunchMappings.Common(),
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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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BuildName: b.config.PackerBuildName,
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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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b.config.Comm.SSHHost,
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),
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SSHConfig: b.config.RunConfig.Comm.SSHConfigFunc(),
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},
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&common.StepProvision{},
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&common.StepCleanupTempKeys{
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Comm: &b.config.RunConfig.Comm,
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},
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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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Skip: b.config.IsSpotInstance(),
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EnableAMISriovNetSupport: b.config.AMISriovNetSupport,
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EnableAMIENASupport: b.config.AMIENASupport,
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},
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&StepSnapshotVolumes{
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LaunchDevices: launchDevices,
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SnapshotOmitMap: b.config.LaunchMappings.GetOmissions(),
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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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AMIDevices: amiDevices,
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LaunchDevices: launchDevices,
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EnableAMISriovNetSupport: b.config.AMISriovNetSupport,
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EnableAMIENASupport: b.config.AMIENASupport,
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Architecture: b.config.Architecture,
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LaunchOmitMap: b.config.LaunchMappings.GetOmissions(),
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AMISkipBuildRegion: b.config.AMISkipBuildRegion,
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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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AMIKmsKeyId: b.config.AMIKmsKeyId,
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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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OriginalRegion: *ec2conn.Config.Region,
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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(ctx, 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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