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step_run_source_instance.go
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step_run_source_instance.go
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package common
import (
"encoding/base64"
"fmt"
"io/ioutil"
"log"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/service/ec2"
"github.com/hashicorp/packer/packer"
"github.com/hashicorp/packer/template/interpolate"
"github.com/mitchellh/multistep"
)
type StepRunSourceInstance struct {
AssociatePublicIpAddress bool
AvailabilityZone string
BlockDevices BlockDevices
Debug bool
EbsOptimized bool
ExpectedRootDevice string
IamInstanceProfile string
InstanceInitiatedShutdownBehavior string
InstanceType string
SourceAMI string
SubnetId string
Tags map[string]string
VolumeTags map[string]string
UserData string
UserDataFile string
Ctx interpolate.Context
instanceId string
}
func (s *StepRunSourceInstance) Run(state multistep.StateBag) multistep.StepAction {
ec2conn := state.Get("ec2").(*ec2.EC2)
var keyName string
if name, ok := state.GetOk("keyPair"); ok {
keyName = name.(string)
}
securityGroupIds := aws.StringSlice(state.Get("securityGroupIds").([]string))
ui := state.Get("ui").(packer.Ui)
userData := s.UserData
if s.UserDataFile != "" {
contents, err := ioutil.ReadFile(s.UserDataFile)
if err != nil {
state.Put("error", fmt.Errorf("Problem reading user data file: %s", err))
return multistep.ActionHalt
}
userData = string(contents)
}
// Test if it is encoded already, and if not, encode it
if _, err := base64.StdEncoding.DecodeString(userData); err != nil {
log.Printf("[DEBUG] base64 encoding user data...")
userData = base64.StdEncoding.EncodeToString([]byte(userData))
}
ui.Say("Launching a source AWS instance...")
image, ok := state.Get("source_image").(*ec2.Image)
if !ok {
state.Put("error", fmt.Errorf("source_image type assertion failed"))
return multistep.ActionHalt
}
s.SourceAMI = *image.ImageId
if s.ExpectedRootDevice != "" && *image.RootDeviceType != s.ExpectedRootDevice {
state.Put("error", fmt.Errorf(
"The provided source AMI has an invalid root device type.\n"+
"Expected '%s', got '%s'.",
s.ExpectedRootDevice, *image.RootDeviceType))
return multistep.ActionHalt
}
var instanceId string
ui.Say("Adding tags to source instance")
if _, exists := s.Tags["Name"]; !exists {
s.Tags["Name"] = "Packer Builder"
}
ec2Tags, err := ConvertToEC2Tags(s.Tags, *ec2conn.Config.Region, s.SourceAMI, s.Ctx)
if err != nil {
err := fmt.Errorf("Error tagging source instance: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
ReportTags(ui, ec2Tags)
volTags, err := ConvertToEC2Tags(s.VolumeTags, *ec2conn.Config.Region, s.SourceAMI, s.Ctx)
if err != nil {
err := fmt.Errorf("Error tagging volumes: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
runOpts := &ec2.RunInstancesInput{
ImageId: &s.SourceAMI,
InstanceType: &s.InstanceType,
UserData: &userData,
MaxCount: aws.Int64(1),
MinCount: aws.Int64(1),
IamInstanceProfile: &ec2.IamInstanceProfileSpecification{Name: &s.IamInstanceProfile},
BlockDeviceMappings: s.BlockDevices.BuildLaunchDevices(),
Placement: &ec2.Placement{AvailabilityZone: &s.AvailabilityZone},
EbsOptimized: &s.EbsOptimized,
}
var tagSpecs []*ec2.TagSpecification
if len(ec2Tags) > 0 {
runTags := &ec2.TagSpecification{
ResourceType: aws.String("instance"),
Tags: ec2Tags,
}
tagSpecs = append(tagSpecs, runTags)
}
if len(volTags) > 0 {
runVolTags := &ec2.TagSpecification{
ResourceType: aws.String("volume"),
Tags: volTags,
}
tagSpecs = append(tagSpecs, runVolTags)
}
if len(tagSpecs) > 0 {
runOpts.SetTagSpecifications(tagSpecs)
}
if keyName != "" {
runOpts.KeyName = &keyName
}
if s.SubnetId != "" && s.AssociatePublicIpAddress {
runOpts.NetworkInterfaces = []*ec2.InstanceNetworkInterfaceSpecification{
{
DeviceIndex: aws.Int64(0),
AssociatePublicIpAddress: &s.AssociatePublicIpAddress,
SubnetId: &s.SubnetId,
Groups: securityGroupIds,
DeleteOnTermination: aws.Bool(true),
},
}
} else {
runOpts.SubnetId = &s.SubnetId
runOpts.SecurityGroupIds = securityGroupIds
}
if s.ExpectedRootDevice == "ebs" {
runOpts.InstanceInitiatedShutdownBehavior = &s.InstanceInitiatedShutdownBehavior
}
runResp, err := ec2conn.RunInstances(runOpts)
if err != nil {
err := fmt.Errorf("Error launching source instance: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
instanceId = *runResp.Instances[0].InstanceId
// Set the instance ID so that the cleanup works properly
s.instanceId = instanceId
ui.Message(fmt.Sprintf("Instance ID: %s", instanceId))
ui.Say(fmt.Sprintf("Waiting for instance (%v) to become ready...", instanceId))
describeInstanceStatus := &ec2.DescribeInstanceStatusInput{
InstanceIds: []*string{aws.String(instanceId)},
}
if err := ec2conn.WaitUntilInstanceStatusOk(describeInstanceStatus); err != nil {
err := fmt.Errorf("Error waiting for instance (%s) to become ready: %s", instanceId, err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
r, err := ec2conn.DescribeInstances(&ec2.DescribeInstancesInput{
InstanceIds: []*string{aws.String(instanceId)},
})
if err != nil || len(r.Reservations) == 0 || len(r.Reservations[0].Instances) == 0 {
err := fmt.Errorf("Error finding source instance.")
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
instance := r.Reservations[0].Instances[0]
if s.Debug {
if instance.PublicDnsName != nil && *instance.PublicDnsName != "" {
ui.Message(fmt.Sprintf("Public DNS: %s", *instance.PublicDnsName))
}
if instance.PublicIpAddress != nil && *instance.PublicIpAddress != "" {
ui.Message(fmt.Sprintf("Public IP: %s", *instance.PublicIpAddress))
}
if instance.PrivateIpAddress != nil && *instance.PrivateIpAddress != "" {
ui.Message(fmt.Sprintf("Private IP: %s", *instance.PrivateIpAddress))
}
}
state.Put("instance", instance)
return multistep.ActionContinue
}
func (s *StepRunSourceInstance) Cleanup(state multistep.StateBag) {
ec2conn := state.Get("ec2").(*ec2.EC2)
ui := state.Get("ui").(packer.Ui)
// Terminate the source instance if it exists
if s.instanceId != "" {
ui.Say("Terminating the source AWS instance...")
if _, err := ec2conn.TerminateInstances(&ec2.TerminateInstancesInput{InstanceIds: []*string{&s.instanceId}}); err != nil {
ui.Error(fmt.Sprintf("Error terminating instance, may still be around: %s", err))
return
}
stateChange := StateChangeConf{
Pending: []string{"pending", "running", "shutting-down", "stopped", "stopping"},
Refresh: InstanceStateRefreshFunc(ec2conn, s.instanceId),
Target: "terminated",
}
_, err := WaitForState(&stateChange)
if err != nil {
ui.Error(err.Error())
}
}
}