119 lines
3.2 KiB
Go
119 lines
3.2 KiB
Go
package common
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import (
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"fmt"
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"log"
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"sort"
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"time"
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"github.com/aws/aws-sdk-go/service/ec2"
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"github.com/hashicorp/packer/helper/multistep"
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"github.com/hashicorp/packer/packer"
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)
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// StepSourceAMIInfo extracts critical information from the source AMI
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// that is used throughout the AMI creation process.
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//
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// Produces:
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// source_image *ec2.Image - the source AMI info
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type StepSourceAMIInfo struct {
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SourceAmi string
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EnableAMISriovNetSupport bool
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EnableAMIENASupport bool
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AmiFilters AmiFilterOptions
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}
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// Build a slice of AMI filter options from the filters provided.
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func buildAmiFilters(input map[*string]*string) []*ec2.Filter {
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var filters []*ec2.Filter
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for k, v := range input {
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filters = append(filters, &ec2.Filter{
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Name: k,
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Values: []*string{v},
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})
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}
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return filters
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}
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type imageSort []*ec2.Image
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func (a imageSort) Len() int { return len(a) }
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func (a imageSort) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
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func (a imageSort) Less(i, j int) bool {
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itime, _ := time.Parse(time.RFC3339, *a[i].CreationDate)
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jtime, _ := time.Parse(time.RFC3339, *a[j].CreationDate)
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return itime.Unix() < jtime.Unix()
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}
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// Returns the most recent AMI out of a slice of images.
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func mostRecentAmi(images []*ec2.Image) *ec2.Image {
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sortedImages := images
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sort.Sort(imageSort(sortedImages))
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return sortedImages[len(sortedImages)-1]
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}
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func (s *StepSourceAMIInfo) Run(_ context.Context, state multistep.StateBag) multistep.StepAction {
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ec2conn := state.Get("ec2").(*ec2.EC2)
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ui := state.Get("ui").(packer.Ui)
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params := &ec2.DescribeImagesInput{}
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if s.SourceAmi != "" {
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params.ImageIds = []*string{&s.SourceAmi}
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}
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// We have filters to apply
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if len(s.AmiFilters.Filters) > 0 {
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params.Filters = buildAmiFilters(s.AmiFilters.Filters)
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}
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if len(s.AmiFilters.Owners) > 0 {
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params.Owners = s.AmiFilters.Owners
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}
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log.Printf("Using AMI Filters %v", params)
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imageResp, err := ec2conn.DescribeImages(params)
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if err != nil {
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err := fmt.Errorf("Error querying AMI: %s", err)
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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if len(imageResp.Images) == 0 {
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err := fmt.Errorf("No AMI was found matching filters: %v", params)
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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if len(imageResp.Images) > 1 && !s.AmiFilters.MostRecent {
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err := fmt.Errorf("Your query returned more than one result. Please try a more specific search, or set most_recent to true.")
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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var image *ec2.Image
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if s.AmiFilters.MostRecent {
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image = mostRecentAmi(imageResp.Images)
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} else {
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image = imageResp.Images[0]
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}
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ui.Message(fmt.Sprintf("Found Image ID: %s", *image.ImageId))
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// Enhanced Networking can only be enabled on HVM AMIs.
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// See http://goo.gl/icuXh5
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if (s.EnableAMIENASupport || s.EnableAMISriovNetSupport) && *image.VirtualizationType != "hvm" {
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err := fmt.Errorf("Cannot enable enhanced networking, source AMI '%s' is not HVM", s.SourceAmi)
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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state.Put("source_image", image)
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return multistep.ActionContinue
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}
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func (s *StepSourceAMIInfo) Cleanup(multistep.StateBag) {}
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