Increase the socket timeout for remote connections to Docker daemon

The default socket timeout with HttpClient 5 is not long enough
in some cases where Docker images are built that require the
GraalVM native image compiler to run in a buildpack. This commit
increases the timeout to 30 minutes.

Fixes gh-37665

Co-authored-by: Scott Frederick <sfrederick@vmware.com>"

spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/docker/transport/RemoteHttpClientTransport.java

@@ -17,17 +17,19 @@
 package org.springframework.boot.buildpack.platform.docker.transport;
 
 import java.net.URISyntaxException;
+import java.util.concurrent.TimeUnit;
 
 import javax.net.ssl.SSLContext;
 
 import org.apache.hc.client5.http.classic.HttpClient;
 import org.apache.hc.client5.http.impl.classic.HttpClientBuilder;
 import org.apache.hc.client5.http.impl.classic.HttpClients;
-import org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManager;
 import org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManagerBuilder;
 import org.apache.hc.client5.http.socket.LayeredConnectionSocketFactory;
 import org.apache.hc.client5.http.ssl.SSLConnectionSocketFactory;
 import org.apache.hc.core5.http.HttpHost;
+import org.apache.hc.core5.http.io.SocketConfig;
+import org.apache.hc.core5.util.Timeout;
 
 import org.springframework.boot.buildpack.platform.docker.configuration.DockerHost;
 import org.springframework.boot.buildpack.platform.docker.configuration.ResolvedDockerHost;
@@ -42,6 +44,8 @@
  */
 final class RemoteHttpClientTransport extends HttpClientTransport {
 
+	private static final Timeout SOCKET_TIMEOUT = Timeout.of(30, TimeUnit.MINUTES);
+
 	private RemoteHttpClientTransport(HttpClient client, HttpHost host) {
 		super(client, host);
 	}
@@ -65,13 +69,15 @@ static RemoteHttpClientTransport createIfPossible(ResolvedDockerHost dockerHost,
 
 	private static RemoteHttpClientTransport create(DockerHost host, SslContextFactory sslContextFactory,
 			HttpHost tcpHost) {
-		HttpClientBuilder builder = HttpClients.custom();
+		SocketConfig socketConfig = SocketConfig.copy(SocketConfig.DEFAULT).setSoTimeout(SOCKET_TIMEOUT).build();
+		PoolingHttpClientConnectionManagerBuilder connectionManagerBuilder = PoolingHttpClientConnectionManagerBuilder
+			.create()
+			.setDefaultSocketConfig(socketConfig);
 		if (host.isSecure()) {
-			PoolingHttpClientConnectionManager connectionManager = PoolingHttpClientConnectionManagerBuilder.create()
-				.setSSLSocketFactory(getSecureConnectionSocketFactory(host, sslContextFactory))
-				.build();
-			builder.setConnectionManager(connectionManager);
+			connectionManagerBuilder.setSSLSocketFactory(getSecureConnectionSocketFactory(host, sslContextFactory));
 		}
+		HttpClientBuilder builder = HttpClients.custom();
+		builder.setConnectionManager(connectionManagerBuilder.build());
 		String scheme = host.isSecure() ? "https" : "http";
 		HttpHost httpHost = new HttpHost(scheme, tcpHost.getHostName(), tcpHost.getPort());
 		return new RemoteHttpClientTransport(builder.build(), httpHost);