Merge pull request #2962 from dave2/postprocess_amazon_ova
New post-processor: amazon-import
This commit is contained in:
Chris Bednarski
commit
765ec5cf39
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@ -8,6 +8,7 @@ import (
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"os"
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"strconv"
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"time"
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"strings"
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"github.com/aws/aws-sdk-go/aws/awserr"
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"github.com/aws/aws-sdk-go/service/ec2"
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@ -128,6 +129,34 @@ func SpotRequestStateRefreshFunc(conn *ec2.EC2, spotRequestId string) StateRefre
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}
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}
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func ImportImageRefreshFunc(conn *ec2.EC2, importTaskId string) StateRefreshFunc {
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return func() (interface{}, string, error) {
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resp, err := conn.DescribeImportImageTasks(&ec2.DescribeImportImageTasksInput{
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ImportTaskIds: []*string{
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&importTaskId,
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},
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},
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)
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if err != nil {
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if ec2err, ok := err.(awserr.Error); ok && strings.HasPrefix(ec2err.Code(),"InvalidConversionTaskId") {
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resp = nil
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} else if isTransientNetworkError(err) {
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resp = nil
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} else {
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log.Printf("Error on ImportImageRefresh: %s", err)
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return nil, "", err
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}
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}
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if resp == nil || len(resp.ImportImageTasks) == 0 {
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return nil, "", nil
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}
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i := resp.ImportImageTasks[0]
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return i, *i.Status, nil
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}
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}
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// WaitForState watches an object and waits for it to achieve a certain
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// state.
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func WaitForState(conf *StateChangeConf) (i interface{}, err error) {
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@ -0,0 +1,288 @@
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package amazonimport
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import (
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"fmt"
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"strings"
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"os"
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"log"
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"github.com/aws/aws-sdk-go/aws"
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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/aws/aws-sdk-go/service/s3/s3manager"
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"github.com/aws/aws-sdk-go/service/s3"
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// This is bad, it should be pulled out into a common folder across
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// both builders and post-processors
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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/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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const BuilderId = "packer.post-processor.amazon-import"
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// Configuration of this post processor
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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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// Variables specific to this post processor
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S3Bucket string `mapstructure:"s3_bucket_name"`
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S3Key string `mapstructure:"s3_key_name"`
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SkipClean bool `mapstructure:"skip_clean"`
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Tags map[string]string `mapstructure:"tags"`
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ctx interpolate.Context
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}
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type PostProcessor struct {
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config Config
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}
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// Entry point for configuration parisng when we've defined
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func (p *PostProcessor) Configure(raws ...interface{}) error {
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p.config.ctx.Funcs = awscommon.TemplateFuncs
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err := config.Decode(&p.config, &config.DecodeOpts{
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Interpolate: true,
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InterpolateContext: &p.config.ctx,
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InterpolateFilter: &interpolate.RenderFilter{
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Exclude: []string{
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"s3_key_name",
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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 err
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}
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// Set defaults
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if p.config.S3Key == "" {
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p.config.S3Key = "packer-import-{{timestamp}}.ova"
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}
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errs := new(packer.MultiError)
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// Check and render s3_key_name
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if err = interpolate.Validate(p.config.S3Key, &p.config.ctx); err != nil {
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errs = packer.MultiErrorAppend(
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errs, fmt.Errorf("Error parsing s3_key_name template: %s", err))
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}
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// Check we have AWS access variables defined somewhere
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errs = packer.MultiErrorAppend(errs, p.config.AccessConfig.Prepare(&p.config.ctx)...)
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// define all our required paramaters
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templates := map[string]*string{
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"s3_bucket_name": &p.config.S3Bucket,
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}
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// Check out required params are defined
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for key, ptr := range templates {
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if *ptr == "" {
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errs = packer.MultiErrorAppend(
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errs, fmt.Errorf("%s must be set", key))
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}
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}
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// Anything which flagged return back up the stack
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if len(errs.Errors) > 0 {
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return errs
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}
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return nil
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}
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func (p *PostProcessor) PostProcess(ui packer.Ui, artifact packer.Artifact) (packer.Artifact, bool, error) {
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var err error
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config, err := p.config.Config()
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if err != nil {
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return nil, false, err
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}
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// Render this key since we didn't in the configure phase
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p.config.S3Key, err = interpolate.Render(p.config.S3Key, &p.config.ctx)
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if err != nil {
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return nil, false, fmt.Errorf("Error rendering s3_key_name template: %s", err)
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}
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log.Printf("Rendered s3_key_name as %s", p.config.S3Key)
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log.Println("Looking for OVA in artifact")
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// Locate the files output from the builder
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source := ""
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for _, path := range artifact.Files() {
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if strings.HasSuffix(path, ".ova") {
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source = path
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break
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}
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}
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// Hope we found something useful
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if source == "" {
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return nil, false, fmt.Errorf("No OVA file found in artifact from builder")
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}
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// Set up the AWS session
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log.Println("Creating AWS session")
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session := session.New(config)
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// open the source file
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log.Printf("Opening file %s to upload", source)
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file, err := os.Open(source)
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if err != nil {
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return nil, false, fmt.Errorf("Failed to open %s: %s", source, err)
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}
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ui.Message(fmt.Sprintf("Uploading %s to s3://%s/%s", source, p.config.S3Bucket, p.config.S3Key))
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// Copy the OVA file into the S3 bucket specified
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uploader := s3manager.NewUploader(session)
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_, err = uploader.Upload(&s3manager.UploadInput{
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Body: file,
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Bucket: &p.config.S3Bucket,
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Key: &p.config.S3Key,
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})
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if err != nil {
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return nil, false, fmt.Errorf("Failed to upload %s: %s", source, err)
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}
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// May as well stop holding this open now
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file.Close()
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ui.Message(fmt.Sprintf("Completed upload of %s to s3://%s/%s", source, p.config.S3Bucket, p.config.S3Key))
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// Call EC2 image import process
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log.Printf("Calling EC2 to import from s3://%s/%s", p.config.S3Bucket, p.config.S3Key)
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ec2conn := ec2.New(session)
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import_start, err := ec2conn.ImportImage(&ec2.ImportImageInput{
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DiskContainers: []*ec2.ImageDiskContainer{
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{
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UserBucket: &ec2.UserBucket{
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S3Bucket: &p.config.S3Bucket,
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S3Key: &p.config.S3Key,
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},
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},
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},
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})
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if err != nil {
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return nil, false, fmt.Errorf("Failed to start import from s3://%s/%s: %s", p.config.S3Bucket, p.config.S3Key, err)
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}
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ui.Message(fmt.Sprintf("Started import of s3://%s/%s, task id %s", p.config.S3Bucket, p.config.S3Key, *import_start.ImportTaskId))
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// Wait for import process to complete, this takess a while
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ui.Message(fmt.Sprintf("Waiting for task %s to complete (may take a while)", *import_start.ImportTaskId))
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stateChange := awscommon.StateChangeConf{
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Pending: []string{"pending","active"},
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Refresh: awscommon.ImportImageRefreshFunc(ec2conn, *import_start.ImportTaskId),
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Target: "completed",
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}
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// Actually do the wait for state change
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// We ignore errors out of this and check job state in AWS API
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awscommon.WaitForState(&stateChange)
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// Retrieve what the outcome was for the import task
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import_result, err := ec2conn.DescribeImportImageTasks(&ec2.DescribeImportImageTasksInput{
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ImportTaskIds: []*string{
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import_start.ImportTaskId,
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},
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})
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if err != nil {
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return nil, false, fmt.Errorf("Failed to find import task %s: %s", *import_start.ImportTaskId, err)
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}
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// Check it was actually completed
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if *import_result.ImportImageTasks[0].Status != "completed" {
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// The most useful error message is from the job itself
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return nil, false, fmt.Errorf("Import task %s failed: %s", *import_start.ImportTaskId, *import_result.ImportImageTasks[0].StatusMessage)
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}
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ui.Message(fmt.Sprintf("Import task %s complete", *import_start.ImportTaskId))
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// Pull AMI ID out of the completed job
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createdami := *import_result.ImportImageTasks[0].ImageId
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// If we have tags, then apply them now to both the AMI and snaps
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// created by the import
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if len(p.config.Tags) > 0 {
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var ec2Tags []*ec2.Tag;
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log.Printf("Repacking tags into AWS format")
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for key, value := range p.config.Tags {
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ui.Message(fmt.Sprintf("Adding tag \"%s\": \"%s\"", key, value))
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ec2Tags = append(ec2Tags, &ec2.Tag{
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Key: aws.String(key),
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Value: aws.String(value),
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})
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}
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resourceIds := []*string{&createdami}
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log.Printf("Getting details of %s", createdami)
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imageResp, err := ec2conn.DescribeImages(&ec2.DescribeImagesInput{
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ImageIds: resourceIds,
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})
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if err != nil {
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return nil, false, fmt.Errorf("Failed to retrieve details for AMI %s: %s", createdami, err)
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}
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if len(imageResp.Images) == 0 {
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return nil, false, fmt.Errorf("AMI %s has no images", createdami)
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}
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image := imageResp.Images[0]
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log.Printf("Walking block device mappings for %s to find snapshots", createdami)
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for _, device := range image.BlockDeviceMappings {
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if device.Ebs != nil && device.Ebs.SnapshotId != nil {
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ui.Message(fmt.Sprintf("Tagging snapshot %s", *device.Ebs.SnapshotId))
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resourceIds = append(resourceIds, device.Ebs.SnapshotId)
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}
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}
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ui.Message(fmt.Sprintf("Tagging AMI %s", createdami))
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_, err = ec2conn.CreateTags(&ec2.CreateTagsInput{
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Resources: resourceIds,
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Tags: ec2Tags,
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})
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if err != nil {
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return nil, false, fmt.Errorf("Failed to add tags to resources %#v: %s", resourceIds, err)
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}
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}
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// Add the reported AMI ID to the artifact list
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log.Printf("Adding created AMI ID %s in region %s to output artifacts", createdami, *config.Region)
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artifact = &awscommon.Artifact{
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Amis: map[string]string{
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*config.Region: createdami,
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},
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BuilderIdValue: BuilderId,
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Conn: ec2conn,
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}
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if !p.config.SkipClean {
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ui.Message(fmt.Sprintf("Deleting import source s3://%s/%s", p.config.S3Bucket, p.config.S3Key))
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s3conn := s3.New(session)
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_, err = s3conn.DeleteObject(&s3.DeleteObjectInput{
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Bucket: &p.config.S3Bucket,
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Key: &p.config.S3Key,
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})
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if err != nil {
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return nil, false, fmt.Errorf("Failed to delete s3://%s/%s: %s", p.config.S3Bucket, p.config.S3Key, err)
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}
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}
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return artifact, false, nil
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}
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@ -0,0 +1,77 @@
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---
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description: |
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The Packer Amazon Import post-processor takes an OVA artifact from various builders and
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imports it to an AMI available to Amazon Web Services EC2.
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layout: docs
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page_title: 'Amazon Import Post-Processor'
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...
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# Amazon Import Post-Processor
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Type: `amazon-import`
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The Packer Amazon Import post-processor takes an OVA artifact from various builder and imports it to an AMI available to Amazon Web Services EC2.
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\~> This post-processor is for advanced users. It depends on specific IAM roles inside AWS and is best used with images that operate with the EC2 configuration model (eg, cloud-init for Linux systems). Please ensure you read the [prerequisites for import](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/VMImportPrerequisites.html) before using this post-processor.
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## How Does it Work?
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The import process operates making a temporary copy of the OVA to an S3 bucket, and calling an import task in EC2 on the OVA file. Once completed, an AMI is returned containing the converted virtual machine. The temporary OVA copy in S3 can be discarded after the import is complete.
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The import process itself run by AWS includes modifications to the image uploaded, to allow it to boot and operate in the AWS EC2 environment. However, not all modifications required to make the machine run well in EC2 are performed. Take care around console output from the machine, as debugging can be very difficult without it. You may also want to include tools suitable for instances in EC2 such as cloud-init for Linux.
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Further information about the import process can be found in AWS's [EC2 Import/Export Instance documentation](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instances_of_your_vm.html).
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## Configuration
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There are some configuration options available for the post-processor. They are
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segmented below into three categories: required and optional parameters.
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Within each category, the available configuration keys are alphabetized.
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Required:
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- `access_key` (string) - The access key used to communicate with AWS. [Learn
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how to set this.](/docs/builders/amazon.html#specifying-amazon-credentials)
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- `region` (string) - The name of the region, such as "us-east-1" in which to upload the OVA file to S3 and create the AMI. A list of valid regions can be obtained with AWS CLI tools or by consulting the AWS website.
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- `s3_bucket_name` (string) - The name of the S3 bucket where the OVA file will be copied to for import. This bucket must exist when the post-processor is run.
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- `secret_key` (string) - The secret key used to communicate with AWS. [Learn
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how to set this.](/docs/builders/amazon.html#specifying-amazon-credentials)
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Optional:
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- `s3_key_name` (string) - The name of the key in `s3_bucket_name` where the OVA file will be copied to for import. If not specified, this will default to "packer-import-{{timestamp}}.ova". This key (ie, the uploaded OVA) will be removed after import, unless `skip_clean` is true.
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- `skip_clean` (boolean) - Whether we should skip removing the OVA file uploaded to S3 after the import process has completed. "true" means that we should leave it in the S3 bucket, "false" means to clean it out. Defaults to "false".
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- `tags` (object of key/value strings) - Tags applied to the created AMI and
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relevant snapshots.
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## Basic Example
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Here is a basic example. This assumes that the builder has produced an OVA artifact for us to work with, and IAM roles for import exist in the AWS account being imported into.
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``` {.javascript}
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{
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"type": "amazon-import",
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"access_key": "YOUR KEY HERE",
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"secret_key": "YOUR SECRET KEY HERE",
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"region": "us-east-1",
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"s3_bucket_name": "importbucket",
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"tags": {
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"Description": "packer amazon-import {{timestamp}}"
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}
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}
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```
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> **Note:** Packer can also read the access key and secret access key from
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environmental variables. See the configuration reference in the section above
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for more information on what environmental variables Packer will look for.
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This will take the OVA generated by a builder and upload it to S3. In this case, an existing bucket called "importbucket" in the "us-east-1" region will be where the copy is placed. The key name of the copy will be a default name generated by packer.
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Once uploaded, the import process will start, creating an AMI in the "us-east-1" region with a "Description" tag applied to both the AMI and the snapshots associated with it. Note: the import process does not allow you to name the AMI, the name is automatically generated by AWS.
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After tagging is completed, the OVA uploaded to S3 will be removed.
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