Have nodeup retry kops-controller bootstrapping sooner if DNS isn't s…

…etup

upup/pkg/fi/nodeup/nodetasks/bootstrap_client.go

@@ -27,13 +27,16 @@ import (
 	"encoding/pem"
 	"fmt"
 	"io/ioutil"
+	"net"
 	"net/http"
 	"net/url"
 	"path"
+	"time"
 
 	"k8s.io/kops/pkg/apis/nodeup"
 	"k8s.io/kops/pkg/pki"
 	"k8s.io/kops/upup/pkg/fi"
+	"k8s.io/kops/upup/pkg/fi/cloudup"
 )
 
 type BootstrapClientTask struct {
@@ -146,6 +149,7 @@ func (b *KopsBootstrapClient) QueryBootstrap(ctx context.Context, req *nodeup.Bo
 		certPool.AppendCertsFromPEM(b.CA)
 
 		b.httpClient = &http.Client{
+			Timeout: time.Duration(15) * time.Second,
 			Transport: &http.Transport{
 				TLSClientConfig: &tls.Config{
 					RootCAs:    certPool,
@@ -155,6 +159,19 @@ func (b *KopsBootstrapClient) QueryBootstrap(ctx context.Context, req *nodeup.Bo
 		}
 	}
 
+	if ips, err := net.LookupIP(b.BaseURL.Host); err != nil {
+		if dnsErr, ok := err.(*net.DNSError); ok && dnsErr.IsNotFound {
+			return nil, fi.NewTryAgainLaterError("kops-controller DNS not setup yet")
+		}
+		return nil, err
+	} else {
+		for _, ip := range ips {
+			if ip.String() == cloudup.PlaceholderIP {
+				return nil, fi.NewTryAgainLaterError("kops-controller DNS not setup yet")
+			}
+		}
+	}
+
 	reqBytes, err := json.Marshal(req)
 	if err != nil {
 		return nil, err