Integration: Change to grpc.NewClient

Fun times: In grpc 1.63 grpc.Dial and a few of the options we use (WithBlock) are
deprecated in favor of the no-IO variant NewClient. The uses in the integration tests
should be easy to swap however as they don't use WithBlock anyways, so that's what this
change aims to do. This also removes some context.WithTimeout's as I don't see anywhere
the context is actually used in Dial if you don't also specify WithBlock (and it's
especially not used now with NewClient as it doesn't even take in a context).

Signed-off-by: Danny Canter <danny@dcantah.dev>

integration/main_test.go

@@ -656,9 +656,7 @@ func RawRuntimeClient() (runtime.RuntimeServiceClient, error) {
 	if err != nil {
 		return nil, fmt.Errorf("failed to get dialer: %w", err)
 	}
-	ctx, cancel := context.WithTimeout(context.Background(), timeout)
+	conn, err := grpc.NewClient(addr,
-	defer cancel()
-	conn, err := grpc.DialContext(ctx, addr,
 		grpc.WithTransportCredentials(insecure.NewCredentials()),
 		grpc.WithContextDialer(dialer),
 	)

integration/remote/remote_image.go

@@ -33,7 +33,6 @@ limitations under the License.
 package remote
 
 import (
-	"context"
 	"errors"
 	"fmt"
 	"time"
@@ -62,10 +61,7 @@ func NewImageService(endpoint string, connectionTimeout time.Duration) (internal
 		return nil, err
 	}
 
-	ctx, cancel := context.WithTimeout(context.Background(), connectionTimeout)
+	conn, err := grpc.NewClient(addr,
-	defer cancel()
-
-	conn, err := grpc.DialContext(ctx, addr,
 		grpc.WithTransportCredentials(insecure.NewCredentials()),
 		grpc.WithContextDialer(dialer),
 		grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(maxMsgSize)),

integration/remote/remote_runtime.go

@@ -70,10 +70,8 @@ func NewRuntimeService(endpoint string, connectionTimeout time.Duration) (intern
 	if err != nil {
 		return nil, err
 	}
-	ctx, cancel := context.WithTimeout(context.Background(), connectionTimeout)
-	defer cancel()
 
-	conn, err := grpc.DialContext(ctx, addr,
+	conn, err := grpc.NewClient(addr,
 		grpc.WithTransportCredentials(insecure.NewCredentials()),
 		grpc.WithContextDialer(dialer),
 		grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(maxMsgSize)),

integration/remote/util/util_unix.go

@@ -36,6 +36,7 @@ package util
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"net"
 	"net/url"
@@ -99,10 +100,16 @@ func GetAddressAndDialer(endpoint string) (string, func(ctx context.Context, add
 		return "", nil, err
 	}
 	if protocol != unixProtocol {
-		return "", nil, fmt.Errorf("only support unix socket endpoint")
+		return "", nil, errors.New("only support unix socket endpoint")
 	}
 
-	return addr, dial, nil
+	// Use passthrough as the scheme so it allows us to use our custom dialer:
+	//
+	// "grpc.Dial uses "passthrough" as the default name resolver for backward compatibility while grpc.NewClient
+	// uses "dns" as its default name resolver. This subtle difference is important to legacy systems that also
+	// specified a custom dialer and expected it to receive the target string directly."
+	// https://github.com/grpc/grpc-go/blob/master/Documentation/anti-patterns.md#the-wrong-way-grpcdial
+	return fmt.Sprintf("passthrough:///%s", addr), dial, nil
 }
 
 func dial(ctx context.Context, addr string) (net.Conn, error) {

integration/remote/util/util_windows.go

@@ -34,6 +34,7 @@ package util
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"net"
 	"net/url"
@@ -75,6 +76,13 @@ func GetAddressAndDialer(endpoint string) (string, func(ctx context.Context, add
 		return "", nil, err
 	}
 
+	// Use passthrough as the scheme so it allows us to use our custom dialer:
+	//
+	// "grpc.Dial uses "passthrough" as the default name resolver for backward compatibility while grpc.NewClient
+	// uses "dns" as its default name resolver. This subtle difference is important to legacy systems that also
+	// specified a custom dialer and expected it to receive the target string directly."
+	// https://github.com/grpc/grpc-go/blob/master/Documentation/anti-patterns.md#the-wrong-way-grpcdial
+	addr = fmt.Sprintf("passthrough:///%s", addr)
 	if protocol == tcpProtocol {
 		return addr, tcpDial, nil
 	}
@@ -83,7 +91,7 @@ func GetAddressAndDialer(endpoint string) (string, func(ctx context.Context, add
 		return addr, npipeDial, nil
 	}
 
-	return "", nil, fmt.Errorf("only support tcp and npipe endpoint")
+	return "", nil, errors.New("only support tcp and npipe endpoint")
 }
 
 func tcpDial(ctx context.Context, addr string) (net.Conn, error) {