372 lines
12 KiB
Go
372 lines
12 KiB
Go
package common
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import (
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"context"
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"encoding/base64"
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"fmt"
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"io/ioutil"
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"log"
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"time"
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"github.com/aws/aws-sdk-go/aws"
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"github.com/aws/aws-sdk-go/service/ec2"
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"github.com/hashicorp/packer/common/retry"
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"github.com/hashicorp/packer/helper/communicator"
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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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type StepRunSourceInstance struct {
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AssociatePublicIpAddress bool
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LaunchMappings EC2BlockDeviceMappingsBuilder
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Comm *communicator.Config
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Ctx interpolate.Context
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Debug bool
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EbsOptimized bool
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EnableT2Unlimited bool
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ExpectedRootDevice string
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InstanceInitiatedShutdownBehavior string
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InstanceType string
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IsRestricted bool
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SourceAMI string
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Tags TagMap
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UserData string
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UserDataFile string
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VolumeTags TagMap
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NoEphemeral bool
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instanceId string
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}
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func (s *StepRunSourceInstance) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
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ec2conn := state.Get("ec2").(*ec2.EC2)
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securityGroupIds := aws.StringSlice(state.Get("securityGroupIds").([]string))
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iamInstanceProfile := aws.String(state.Get("iamInstanceProfile").(string))
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ui := state.Get("ui").(packer.Ui)
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userData := s.UserData
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if s.UserDataFile != "" {
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contents, err := ioutil.ReadFile(s.UserDataFile)
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if err != nil {
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state.Put("error", fmt.Errorf("Problem reading user data file: %s", err))
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return multistep.ActionHalt
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}
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userData = string(contents)
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}
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// Test if it is encoded already, and if not, encode it
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if _, err := base64.StdEncoding.DecodeString(userData); err != nil {
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log.Printf("[DEBUG] base64 encoding user data...")
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userData = base64.StdEncoding.EncodeToString([]byte(userData))
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}
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ui.Say("Launching a source AWS instance...")
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image, ok := state.Get("source_image").(*ec2.Image)
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if !ok {
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state.Put("error", fmt.Errorf("source_image type assertion failed"))
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return multistep.ActionHalt
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}
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s.SourceAMI = *image.ImageId
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if s.ExpectedRootDevice != "" && *image.RootDeviceType != s.ExpectedRootDevice {
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state.Put("error", fmt.Errorf(
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"The provided source AMI has an invalid root device type.\n"+
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"Expected '%s', got '%s'.",
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s.ExpectedRootDevice, *image.RootDeviceType))
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return multistep.ActionHalt
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}
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var instanceId string
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ui.Say("Adding tags to source instance")
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if _, exists := s.Tags["Name"]; !exists {
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s.Tags["Name"] = "Packer Builder"
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}
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ec2Tags, err := s.Tags.EC2Tags(s.Ctx, *ec2conn.Config.Region, state)
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if err != nil {
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err := fmt.Errorf("Error tagging source instance: %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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volTags, err := s.VolumeTags.EC2Tags(s.Ctx, *ec2conn.Config.Region, state)
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if err != nil {
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err := fmt.Errorf("Error tagging volumes: %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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az := state.Get("availability_zone").(string)
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runOpts := &ec2.RunInstancesInput{
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ImageId: &s.SourceAMI,
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InstanceType: &s.InstanceType,
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UserData: &userData,
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MaxCount: aws.Int64(1),
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MinCount: aws.Int64(1),
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IamInstanceProfile: &ec2.IamInstanceProfileSpecification{Name: iamInstanceProfile},
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BlockDeviceMappings: s.LaunchMappings.BuildEC2BlockDeviceMappings(),
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Placement: &ec2.Placement{AvailabilityZone: &az},
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EbsOptimized: &s.EbsOptimized,
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}
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if s.NoEphemeral {
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// This is only relevant for windows guests. Ephemeral drives by
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// default are assigned to drive names xvdca-xvdcz.
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// When vms are launched from the AWS console, they're automatically
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// removed from the block devices if the user hasn't said to use them,
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// but the SDK does not perform this cleanup. The following code just
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// manually removes the ephemeral drives from the mapping so that they
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// don't clutter up console views and cause confusion.
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log.Printf("no_ephemeral was set, so creating drives xvdca-xvdcz as empty mappings")
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DefaultEphemeralDeviceLetters := "abcdefghijklmnopqrstuvwxyz"
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for _, letter := range DefaultEphemeralDeviceLetters {
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bd := &ec2.BlockDeviceMapping{
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DeviceName: aws.String("xvdc" + string(letter)),
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NoDevice: aws.String(""),
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}
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runOpts.BlockDeviceMappings = append(runOpts.BlockDeviceMappings, bd)
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}
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}
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if s.EnableT2Unlimited {
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creditOption := "unlimited"
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runOpts.CreditSpecification = &ec2.CreditSpecificationRequest{CpuCredits: &creditOption}
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}
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// Collect tags for tagging on resource creation
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var tagSpecs []*ec2.TagSpecification
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if len(ec2Tags) > 0 {
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runTags := &ec2.TagSpecification{
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ResourceType: aws.String("instance"),
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Tags: ec2Tags,
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}
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tagSpecs = append(tagSpecs, runTags)
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}
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if len(volTags) > 0 {
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runVolTags := &ec2.TagSpecification{
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ResourceType: aws.String("volume"),
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Tags: volTags,
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}
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tagSpecs = append(tagSpecs, runVolTags)
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}
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// If our region supports it, set tag specifications
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if len(tagSpecs) > 0 && !s.IsRestricted {
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runOpts.SetTagSpecifications(tagSpecs)
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ec2Tags.Report(ui)
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volTags.Report(ui)
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}
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if s.Comm.SSHKeyPairName != "" {
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runOpts.KeyName = &s.Comm.SSHKeyPairName
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}
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subnetId := state.Get("subnet_id").(string)
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if subnetId != "" && s.AssociatePublicIpAddress {
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runOpts.NetworkInterfaces = []*ec2.InstanceNetworkInterfaceSpecification{
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{
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DeviceIndex: aws.Int64(0),
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AssociatePublicIpAddress: &s.AssociatePublicIpAddress,
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SubnetId: aws.String(subnetId),
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Groups: securityGroupIds,
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DeleteOnTermination: aws.Bool(true),
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},
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}
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} else {
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runOpts.SubnetId = aws.String(subnetId)
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runOpts.SecurityGroupIds = securityGroupIds
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}
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if s.ExpectedRootDevice == "ebs" {
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runOpts.InstanceInitiatedShutdownBehavior = &s.InstanceInitiatedShutdownBehavior
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}
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var runResp *ec2.Reservation
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err = retry.Config{
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Tries: 11,
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ShouldRetry: func(err error) bool {
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if isAWSErr(err, "InvalidParameterValue", "iamInstanceProfile") {
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return true
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}
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return false
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},
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RetryDelay: (&retry.Backoff{InitialBackoff: 200 * time.Millisecond, MaxBackoff: 30 * time.Second, Multiplier: 2}).Linear,
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}.Run(ctx, func(ctx context.Context) error {
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runResp, err = ec2conn.RunInstances(runOpts)
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return err
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})
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if isAWSErr(err, "VPCIdNotSpecified", "No default VPC for this user") && subnetId == "" {
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err := fmt.Errorf("Error launching source instance: a valid Subnet Id was not specified")
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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 err != nil {
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err := fmt.Errorf("Error launching source instance: %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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instanceId = *runResp.Instances[0].InstanceId
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// Set the instance ID so that the cleanup works properly
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s.instanceId = instanceId
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ui.Message(fmt.Sprintf("Instance ID: %s", instanceId))
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ui.Say(fmt.Sprintf("Waiting for instance (%v) to become ready...", instanceId))
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describeInstance := &ec2.DescribeInstancesInput{
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InstanceIds: []*string{aws.String(instanceId)},
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}
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if err := WaitUntilInstanceRunning(ctx, ec2conn, instanceId); err != nil {
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err := fmt.Errorf("Error waiting for instance (%s) to become ready: %s", instanceId, 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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// there's a race condition that can happen because of AWS's eventual
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// consistency where even though the wait is complete, the describe call
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// will fail. Retry a couple of times to try to mitigate that race.
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var r *ec2.DescribeInstancesOutput
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err = retry.Config{Tries: 11, ShouldRetry: func(err error) bool {
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if isAWSErr(err, "InvalidInstanceID.NotFound", "") {
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return true
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}
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return false
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},
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RetryDelay: (&retry.Backoff{InitialBackoff: 200 * time.Millisecond, MaxBackoff: 30 * time.Second, Multiplier: 2}).Linear,
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}.Run(ctx, func(ctx context.Context) error {
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r, err = ec2conn.DescribeInstances(describeInstance)
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return err
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})
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if err != nil || len(r.Reservations) == 0 || len(r.Reservations[0].Instances) == 0 {
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err := fmt.Errorf("Error finding source instance.")
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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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instance := r.Reservations[0].Instances[0]
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if s.Debug {
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if instance.PublicDnsName != nil && *instance.PublicDnsName != "" {
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ui.Message(fmt.Sprintf("Public DNS: %s", *instance.PublicDnsName))
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}
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if instance.PublicIpAddress != nil && *instance.PublicIpAddress != "" {
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ui.Message(fmt.Sprintf("Public IP: %s", *instance.PublicIpAddress))
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}
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if instance.PrivateIpAddress != nil && *instance.PrivateIpAddress != "" {
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ui.Message(fmt.Sprintf("Private IP: %s", *instance.PrivateIpAddress))
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}
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}
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state.Put("instance", instance)
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// instance_id is the generic term used so that users can have access to the
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// instance id inside of the provisioners, used in step_provision.
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state.Put("instance_id", instance.InstanceId)
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// If we're in a region that doesn't support tagging on instance creation,
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// do that now.
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if s.IsRestricted {
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ec2Tags.Report(ui)
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// Retry creating tags for about 2.5 minutes
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err = retry.Config{Tries: 11, ShouldRetry: func(error) bool {
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if isAWSErr(err, "InvalidInstanceID.NotFound", "") {
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return true
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}
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return false
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},
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RetryDelay: (&retry.Backoff{InitialBackoff: 200 * time.Millisecond, MaxBackoff: 30 * time.Second, Multiplier: 2}).Linear,
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}.Run(ctx, func(ctx context.Context) error {
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_, err := ec2conn.CreateTags(&ec2.CreateTagsInput{
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Tags: ec2Tags,
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Resources: []*string{instance.InstanceId},
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})
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return err
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})
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if err != nil {
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err := fmt.Errorf("Error tagging source instance: %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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// Now tag volumes
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volumeIds := make([]*string, 0)
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for _, v := range instance.BlockDeviceMappings {
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if ebs := v.Ebs; ebs != nil {
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volumeIds = append(volumeIds, ebs.VolumeId)
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}
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}
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if len(volumeIds) > 0 && s.VolumeTags.IsSet() {
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ui.Say("Adding tags to source EBS Volumes")
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volumeTags, err := s.VolumeTags.EC2Tags(s.Ctx, *ec2conn.Config.Region, state)
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if err != nil {
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err := fmt.Errorf("Error tagging source EBS Volumes on %s: %s", *instance.InstanceId, 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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volumeTags.Report(ui)
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_, err = ec2conn.CreateTags(&ec2.CreateTagsInput{
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Resources: volumeIds,
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Tags: volumeTags,
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})
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if err != nil {
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err := fmt.Errorf("Error tagging source EBS Volumes on %s: %s", *instance.InstanceId, 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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}
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}
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return multistep.ActionContinue
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}
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func (s *StepRunSourceInstance) Cleanup(state multistep.StateBag) {
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ec2conn := state.Get("ec2").(*ec2.EC2)
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ui := state.Get("ui").(packer.Ui)
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// Terminate the source instance if it exists
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if s.instanceId != "" {
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ui.Say("Terminating the source AWS instance...")
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if _, err := ec2conn.TerminateInstances(&ec2.TerminateInstancesInput{InstanceIds: []*string{&s.instanceId}}); err != nil {
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ui.Error(fmt.Sprintf("Error terminating instance, may still be around: %s", err))
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return
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}
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if err := WaitUntilInstanceTerminated(aws.BackgroundContext(), ec2conn, s.instanceId); err != nil {
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ui.Error(err.Error())
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}
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}
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}
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