Bug 2048451: Fix proxy dial to pick all proxies

go.mod

@@ -67,7 +67,6 @@ require (
 	github.com/vmware/govmomi v0.24.0
 	golang.org/x/crypto v0.0.0-20211202192323-5770296d904e
 	golang.org/x/lint v0.0.0-20210508222113-6edffad5e616
-	golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd
 	golang.org/x/oauth2 v0.0.0-20210819190943-2bc19b11175f
 	golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e
 	google.golang.org/api v0.44.0
@@ -189,6 +188,7 @@ require (
 	github.com/prometheus/client_model v0.2.0 // indirect
 	github.com/prometheus/procfs v0.6.0 // indirect
 	github.com/satori/go.uuid v1.2.0 // indirect
+	golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd // indirect
 )
 
 // OpenShift Forks

pkg/asset/installconfig/aws/validation.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"net"
+	"net/http"
 	"net/url"
 	"sort"
 	"strings"
@@ -14,7 +15,6 @@ import (
 	"github.com/aws/aws-sdk-go/service/ec2"
 	"github.com/aws/aws-sdk-go/service/route53"
 	"github.com/pkg/errors"
-	"golang.org/x/net/proxy"
 	utilerrors "k8s.io/apimachinery/pkg/util/errors"
 	"k8s.io/apimachinery/pkg/util/sets"
 	"k8s.io/apimachinery/pkg/util/validation/field"
@@ -321,20 +321,12 @@ func validateEndpointAccessibility(endpointURL string) error {
 	if endpointURL == "e2e.local" {
 		return nil
 	}
-	URL, err := url.Parse(endpointURL)
+	_, err := url.Parse(endpointURL)
 	if err != nil {
 		return err
 	}
-	port := URL.Port()
-	if port == "" {
-		port = "https"
-	}
-	conn, err := proxy.Dial(context.Background(), "tcp", net.JoinHostPort(URL.Hostname(), port))
-	if err != nil {
-		return err
-	}
-	conn.Close()
-	return nil
+	_, err = http.Head(endpointURL)
+	return err
 }
 
 var requiredServices = []string{

pkg/asset/installconfig/aws/validation_test.go

@@ -2,6 +2,7 @@ package aws
 
 import (
 	"context"
+	"os"
 	"testing"
 
 	"github.com/aws/aws-sdk-go/service/route53"
@@ -122,6 +123,16 @@ func validServiceEndpoints() []aws.ServiceEndpoint {
 	}}
 }
 
+func invalidServiceEndpoint() []aws.ServiceEndpoint {
+	return []aws.ServiceEndpoint{{
+		Name: "testing",
+		URL:  "testing",
+	}, {
+		Name: "test",
+		URL:  "http://testing.non",
+	}}
+}
+
 func validInstanceTypes() map[string]InstanceType {
 	return map[string]InstanceType{
 		"t2.small": {
@@ -146,6 +157,7 @@ func TestValidate(t *testing.T) {
 		privateSubnets map[string]Subnet
 		publicSubnets  map[string]Subnet
 		instanceTypes  map[string]InstanceType
+		proxy          string
 		expectErr      string
 	}{{
 		name: "valid no byo",
@@ -570,6 +582,46 @@ func TestValidate(t *testing.T) {
 		privateSubnets: validPrivateSubnets(),
 		publicSubnets:  validPublicSubnets(),
 		expectErr:      `^platform\.aws\.amiID: Required value: AMI must be provided$`,
+	}, {
+		name: "invalid endpoint URL",
+		installConfig: func() *types.InstallConfig {
+			c := validInstallConfig()
+			c.Platform.AWS.Region = "us-east-1"
+			c.Platform.AWS.ServiceEndpoints = invalidServiceEndpoint()
+			c.Platform.AWS.AMIID = "custom-ami"
+			return c
+		}(),
+		availZones:     validAvailZones(),
+		privateSubnets: validPrivateSubnets(),
+		publicSubnets:  validPublicSubnets(),
+		expectErr:      `^\Q[platform.aws.serviceEndpoints[0].url: Invalid value: "testing": Head "testing": unsupported protocol scheme "", platform.aws.serviceEndpoints[1].url: Invalid value: "http://testing.non": Head "http://testing.non": dial tcp: lookup testing.non\E.*: no such host\]$`,
+	}, {
+		name: "invalid proxy URL but valid URL",
+		installConfig: func() *types.InstallConfig {
+			c := validInstallConfig()
+			c.Platform.AWS.Region = "us-east-1"
+			c.Platform.AWS.AMIID = "custom-ami"
+			c.Platform.AWS.ServiceEndpoints = []aws.ServiceEndpoint{{Name: "test", URL: "http://testing.com"}}
+			return c
+		}(),
+		availZones:     validAvailZones(),
+		privateSubnets: validPrivateSubnets(),
+		publicSubnets:  validPublicSubnets(),
+		proxy:          "proxy",
+	}, {
+		name: "invalid proxy URL and invalid URL",
+		installConfig: func() *types.InstallConfig {
+			c := validInstallConfig()
+			c.Platform.AWS.Region = "us-east-1"
+			c.Platform.AWS.AMIID = "custom-ami"
+			c.Platform.AWS.ServiceEndpoints = []aws.ServiceEndpoint{{Name: "test", URL: "http://test"}}
+			return c
+		}(),
+		availZones:     validAvailZones(),
+		privateSubnets: validPrivateSubnets(),
+		publicSubnets:  validPublicSubnets(),
+		proxy:          "http://proxy.com",
+		expectErr:      `^\Qplatform.aws.serviceEndpoints[0].url: Invalid value: "http://test": Head "http://test": dial tcp: lookup test\E.*: no such host$`,
 	}}
 
 	for _, test := range tests {
@@ -580,6 +632,11 @@ func TestValidate(t *testing.T) {
 				publicSubnets:     test.publicSubnets,
 				instanceTypes:     test.instanceTypes,
 			}
+			if test.proxy != "" {
+				os.Setenv("HTTP_PROXY", test.proxy)
+			} else {
+				os.Unsetenv("HTTP_PROXY")
+			}
 			err := Validate(context.TODO(), meta, test.installConfig)
 			if test.expectErr == "" {
 				assert.NoError(t, err)