// 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 } }