// SSHAddress returns a function that can be given to the SSH communicator
// for determining the SSH address based on the instance DNS name.
func SSHAddress(e ec2.EC2, port int) func(multistep.StateBag) (string, error) {
return func(state multistep.StateBag) (string, error) {
for j := 0; j < 2; j++ {
var host string
i := state.Get("instance").(*ec2.Instance)
if i.DNSName != "" {
host = i.DNSName
} else if i.VpcId != "" {
host = i.PrivateIpAddress
}
if host != "" {
return fmt.Sprintf("%s:%d", host, port), nil
}
r, err := e.Instances([]string{i.InstanceId}, ec2.NewFilter())
if err != nil {
return "", err
}
if len(r.Reservations) == 0 || len(r.Reservations[0].Instances) == 0 {
return "", fmt.Errorf("instance not found: %s", i.InstanceId)
}
state.Put("instance", &r.Reservations[0].Instances[0])
time.Sleep(1 * time.Second)
}
return "", errors.New("couldn't determine IP address for instance")
}
}
// InstanceStateRefreshFunc returns a StateRefreshFunc that is used to watch
// an EC2 instance.
func InstanceStateRefreshFunc(conn ec2.EC2, i *ec2.Instance) StateRefreshFunc {
return func() (interface{}, string, error) {
resp, err := conn.Instances([]string{i.InstanceId}, ec2.NewFilter())
if err != nil {
if ec2err, ok := err.(*ec2.Error); ok && ec2err.Code == "InvalidInstanceID.NotFound" {
// Set this to nil as if we didn't find anything.
resp = nil
} else {
log.Printf("Error on InstanceStateRefresh: %s", err)
return nil, "", err
}
}
if resp == nil || len(resp.Reservations) == 0 || len(resp.Reservations[0].Instances) == 0 {
// Sometimes AWS just has consistency issues and doesn't see
// our instance yet. Return an empty state.
return nil, "", nil
}
i = &resp.Reservations[0].Instances[0]
return i, i.State.Name, nil
}
}