305 lines
9.3 KiB
Go
305 lines
9.3 KiB
Go
// The instance package contains a packer.Builder implementation that builds
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// AMIs for Amazon EC2 backed by instance storage, as opposed to EBS storage.
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package instance
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import (
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"errors"
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"fmt"
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"log"
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"os"
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"strings"
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"github.com/aws/aws-sdk-go/aws/session"
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"github.com/aws/aws-sdk-go/service/ec2"
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"github.com/mitchellh/multistep"
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awscommon "github.com/mitchellh/packer/builder/amazon/common"
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"github.com/mitchellh/packer/common"
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"github.com/mitchellh/packer/helper/communicator"
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"github.com/mitchellh/packer/helper/config"
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"github.com/mitchellh/packer/packer"
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"github.com/mitchellh/packer/template/interpolate"
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)
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// The unique ID for this builder
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const BuilderId = "mitchellh.amazon.instance"
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// Config is the configuration that is chained through the steps and
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// settable from the template.
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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.AMIConfig `mapstructure:",squash"`
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awscommon.BlockDevices `mapstructure:",squash"`
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awscommon.RunConfig `mapstructure:",squash"`
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AccountId string `mapstructure:"account_id"`
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BundleDestination string `mapstructure:"bundle_destination"`
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BundlePrefix string `mapstructure:"bundle_prefix"`
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BundleUploadCommand string `mapstructure:"bundle_upload_command"`
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BundleVolCommand string `mapstructure:"bundle_vol_command"`
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S3Bucket string `mapstructure:"s3_bucket"`
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X509CertPath string `mapstructure:"x509_cert_path"`
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X509KeyPath string `mapstructure:"x509_key_path"`
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X509UploadPath string `mapstructure:"x509_upload_path"`
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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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configs := make([]interface{}, len(raws)+1)
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configs[0] = map[string]interface{}{
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"bundle_prefix": "image-{{timestamp}}",
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}
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copy(configs[1:], raws)
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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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"bundle_upload_command",
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"bundle_vol_command",
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},
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},
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}, configs...)
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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.BundleDestination == "" {
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b.config.BundleDestination = "/tmp"
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}
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if b.config.BundleUploadCommand == "" {
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if b.config.IamInstanceProfile != "" {
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b.config.BundleUploadCommand = "sudo -i -n ec2-upload-bundle " +
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"-b {{.BucketName}} " +
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"-m {{.ManifestPath}} " +
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"-d {{.BundleDirectory}} " +
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"--batch " +
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"--region {{.Region}} " +
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"--retry"
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} else {
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b.config.BundleUploadCommand = "sudo -i -n ec2-upload-bundle " +
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"-b {{.BucketName}} " +
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"-m {{.ManifestPath}} " +
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"-a {{.AccessKey}} " +
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"-s {{.SecretKey}} " +
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"-d {{.BundleDirectory}} " +
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"--batch " +
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"--region {{.Region}} " +
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"--retry"
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}
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}
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if b.config.BundleVolCommand == "" {
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b.config.BundleVolCommand = "sudo -i -n ec2-bundle-vol " +
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"-k {{.KeyPath}} " +
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"-u {{.AccountId}} " +
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"-c {{.CertPath}} " +
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"-r {{.Architecture}} " +
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"-e {{.PrivatePath}}/* " +
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"-d {{.Destination}} " +
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"-p {{.Prefix}} " +
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"--batch " +
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"--no-filter"
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}
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if b.config.X509UploadPath == "" {
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b.config.X509UploadPath = "/tmp"
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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.BlockDevices.Prepare(&b.config.ctx)...)
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errs = packer.MultiErrorAppend(errs, b.config.AMIConfig.Prepare(&b.config.ctx)...)
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errs = packer.MultiErrorAppend(errs, b.config.RunConfig.Prepare(&b.config.ctx)...)
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if b.config.AccountId == "" {
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errs = packer.MultiErrorAppend(errs, errors.New("account_id is required"))
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} else {
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b.config.AccountId = strings.Replace(b.config.AccountId, "-", "", -1)
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}
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if b.config.S3Bucket == "" {
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errs = packer.MultiErrorAppend(errs, errors.New("s3_bucket is required"))
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}
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if b.config.X509CertPath == "" {
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errs = packer.MultiErrorAppend(errs, errors.New("x509_cert_path is required"))
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} else if _, err := os.Stat(b.config.X509CertPath); err != nil {
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errs = packer.MultiErrorAppend(
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errs, fmt.Errorf("x509_cert_path points to bad file: %s", err))
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}
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if b.config.X509KeyPath == "" {
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errs = packer.MultiErrorAppend(errs, errors.New("x509_key_path is required"))
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} else if _, err := os.Stat(b.config.X509KeyPath); err != nil {
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errs = packer.MultiErrorAppend(
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errs, fmt.Errorf("x509_key_path points to bad file: %s", err))
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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))
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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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config, err := b.config.Config()
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if err != nil {
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return nil, err
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}
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session, err := session.NewSession(config)
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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 AZ, try to determine the AZ automatically
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if b.config.SubnetId != "" && b.config.AvailabilityZone == "" {
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log.Printf("[INFO] Finding AZ 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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b.config.AvailabilityZone = *resp.Subnets[0].AvailabilityZone
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log.Printf("[INFO] AZ found: '%s'", b.config.AvailabilityZone)
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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("hook", hook)
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state.Put("ui", ui)
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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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EnhancedNetworking: b.config.AMIEnhancedNetworking,
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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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PrivateKeyFile: b.config.RunConfig.Comm.SSHPrivateKey,
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TemporaryKeyPairName: b.config.TemporaryKeyPairName,
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},
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&awscommon.StepSecurityGroup{
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CommConfig: &b.config.RunConfig.Comm,
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SecurityGroupIds: b.config.SecurityGroupIds,
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VpcId: b.config.VpcId,
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},
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&awscommon.StepRunSourceInstance{
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Debug: b.config.PackerDebug,
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SpotPrice: b.config.SpotPrice,
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SpotPriceProduct: b.config.SpotPriceAutoProduct,
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InstanceType: b.config.InstanceType,
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IamInstanceProfile: b.config.IamInstanceProfile,
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UserData: b.config.UserData,
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UserDataFile: b.config.UserDataFile,
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SourceAMI: b.config.SourceAmi,
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SubnetId: b.config.SubnetId,
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AssociatePublicIpAddress: b.config.AssociatePublicIpAddress,
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EbsOptimized: b.config.EbsOptimized,
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AvailabilityZone: b.config.AvailabilityZone,
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BlockDevices: b.config.BlockDevices,
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Tags: b.config.RunTags,
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},
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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.SSHPrivateIp),
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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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&StepUploadX509Cert{},
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&StepBundleVolume{
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Debug: b.config.PackerDebug,
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},
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&StepUploadBundle{
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Debug: b.config.PackerDebug,
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},
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&awscommon.StepDeregisterAMI{
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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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},
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&StepRegisterAMI{},
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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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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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},
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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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},
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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 there are no AMIs, then just return
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if _, ok := state.GetOk("amis"); !ok {
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return nil, nil
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}
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// Build the artifact and return it
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artifact := &awscommon.Artifact{
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Amis: state.Get("amis").(map[string]string),
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BuilderIdValue: BuilderId,
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Conn: ec2conn,
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}
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return artifact, 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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