Add the session header to every Docker request (#5145)

To improve tracing and other operations, we add current session's id
to every Docker request that we are making.

Author: bsideup

core/src/main/java/org/testcontainers/dockerclient/DockerClientProviderStrategy.java

@@ -20,10 +20,12 @@
 import org.rnorth.ducttape.ratelimits.RateLimiter;
 import org.rnorth.ducttape.ratelimits.RateLimiterBuilder;
 import org.rnorth.ducttape.unreliables.Unreliables;
+import org.testcontainers.DockerClientFactory;
 import org.testcontainers.utility.TestcontainersConfiguration;
 
 import java.net.URI;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.Comparator;
 import java.util.HashSet;
 import java.util.List;
@@ -282,7 +284,10 @@ public static DockerClient getClientForConfig(TransportConfig transportConfig) {
                     .withDockerHost(transportConfig.getDockerHost().toString())
                     .build()
             ),
-            dockerHttpClient
+            new HeadersAddingDockerHttpClient(
+                dockerHttpClient,
+                Collections.singletonMap("x-tc-sid", DockerClientFactory.SESSION_ID)
+            )
         );
     }
 

core/src/main/java/org/testcontainers/dockerclient/HeadersAddingDockerHttpClient.java

@@ -0,0 +1,27 @@
+package org.testcontainers.dockerclient;
+
+import com.github.dockerjava.transport.DockerHttpClient;
+import lombok.RequiredArgsConstructor;
+import lombok.ToString;
+import lombok.experimental.Delegate;
+
+import java.io.Closeable;
+import java.util.Map;
+
+@RequiredArgsConstructor
+@ToString
+class HeadersAddingDockerHttpClient implements DockerHttpClient {
+
+    @Delegate(types = Closeable.class)
+    final DockerHttpClient delegate;
+
+    final Map<String, String> headers;
+
+    @Override
+    public Response execute(Request request) {
+        request = Request.builder().from(request)
+            .putAllHeaders(headers)
+            .build();
+        return delegate.execute(request);
+    }
+}