packer-cn/builder/amazon/common/step_run_source_instance.go

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package common
import (
"fmt"
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"github.com/mitchellh/goamz/ec2"
"github.com/mitchellh/multistep"
"github.com/mitchellh/packer/packer"
"io/ioutil"
)
type StepRunSourceInstance struct {
AssociatePublicIpAddress bool
AvailabilityZone string
BlockDevices BlockDevices
Debug bool
ExpectedRootDevice string
InstanceType string
IamInstanceProfile string
SourceAMI string
SubnetId string
Tags map[string]string
UserData string
UserDataFile string
instance *ec2.Instance
}
func (s *StepRunSourceInstance) Run(state multistep.StateBag) multistep.StepAction {
ec2conn := state.Get("ec2").(*ec2.EC2)
keyName := state.Get("keyPair").(string)
securityGroupIds := 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)
}
securityGroups := make([]ec2.SecurityGroup, len(securityGroupIds))
for n, securityGroupId := range securityGroupIds {
securityGroups[n] = ec2.SecurityGroup{Id: securityGroupId}
}
runOpts := &ec2.RunInstances{
KeyName: keyName,
ImageId: s.SourceAMI,
InstanceType: s.InstanceType,
UserData: []byte(userData),
MinCount: 0,
MaxCount: 0,
SecurityGroups: securityGroups,
IamInstanceProfile: s.IamInstanceProfile,
SubnetId: s.SubnetId,
AssociatePublicIpAddress: s.AssociatePublicIpAddress,
BlockDevices: s.BlockDevices.BuildLaunchDevices(),
AvailZone: s.AvailabilityZone,
}
ui.Say("Launching a source AWS instance...")
imageResp, err := ec2conn.Images([]string{s.SourceAMI}, ec2.NewFilter())
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if err != nil {
state.Put("error", fmt.Errorf("There was a problem with the source AMI: %s", err))
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return multistep.ActionHalt
}
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if len(imageResp.Images) != 1 {
state.Put("error", fmt.Errorf("The source AMI '%s' could not be found.", s.SourceAMI))
return multistep.ActionHalt
}
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if s.ExpectedRootDevice != "" && imageResp.Images[0].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, imageResp.Images[0].RootDeviceType))
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return multistep.ActionHalt
}
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
}
s.instance = &runResp.Instances[0]
ui.Message(fmt.Sprintf("Instance ID: %s", s.instance.InstanceId))
ec2Tags := make([]ec2.Tag, 1, len(s.Tags)+1)
ec2Tags[0] = ec2.Tag{"Name", "Packer Builder"}
for k, v := range s.Tags {
ec2Tags = append(ec2Tags, ec2.Tag{k, v})
}
_, err = ec2conn.CreateTags([]string{s.instance.InstanceId}, ec2Tags)
if err != nil {
ui.Message(
fmt.Sprintf("Failed to tag a Name on the builder instance: %s", err))
}
ui.Say(fmt.Sprintf("Waiting for instance (%s) to become ready...", s.instance.InstanceId))
stateChange := StateChangeConf{
Pending: []string{"pending"},
Target: "running",
Refresh: InstanceStateRefreshFunc(ec2conn, s.instance),
StepState: state,
}
latestInstance, err := WaitForState(&stateChange)
if err != nil {
err := fmt.Errorf("Error waiting for instance (%s) to become ready: %s", s.instance.InstanceId, err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
s.instance = latestInstance.(*ec2.Instance)
if s.Debug {
if s.instance.DNSName != "" {
ui.Message(fmt.Sprintf("Public DNS: %s", s.instance.DNSName))
}
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if s.instance.PublicIpAddress != "" {
ui.Message(fmt.Sprintf("Public IP: %s", s.instance.PublicIpAddress))
}
if s.instance.PrivateIpAddress != "" {
ui.Message(fmt.Sprintf("Private IP: %s", s.instance.PrivateIpAddress))
}
}
state.Put("instance", s.instance)
return multistep.ActionContinue
}
func (s *StepRunSourceInstance) Cleanup(state multistep.StateBag) {
if s.instance == nil {
return
}
ec2conn := state.Get("ec2").(*ec2.EC2)
ui := state.Get("ui").(packer.Ui)
ui.Say("Terminating the source AWS instance...")
if _, err := ec2conn.TerminateInstances([]string{s.instance.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.instance),
Target: "terminated",
}
WaitForState(&stateChange)
}