[improve][broker] Support X-Forwarded-For and HA Proxy Protocol for r…

…esolving original client IP of http/https requests (apache#22524)

(cherry picked from commit 4a88721)

conf/broker.conf

@@ -84,6 +84,16 @@ advertisedAddress=
 # Enable or disable the HAProxy protocol.
 haProxyProtocolEnabled=false
 
+# Enable or disable the use of HA proxy protocol for resolving the client IP for http/https requests.
+webServiceHaProxyProtocolEnabled=false
+
+# Trust X-Forwarded-For header for resolving the client IP for http/https requests. Default is false.
+webServiceTrustXForwardedFor=false
+
+# Add detailed client/remote and server/local addresses and ports to http/https request logging.
+# Defaults to true when either webServiceHaProxyProtocolEnabled or webServiceTrustXForwardedFor is enabled.
+webServiceLogDetailedAddresses=
+
 # Number of threads to config Netty Acceptor. Default is 1
 numAcceptorThreads=
 

conf/functions_worker.yml

@@ -27,6 +27,16 @@ workerHostname: localhost
 workerPort: 6750
 workerPortTls: 6751
 
+# Enable or disable the use of HA proxy protocol for resolving the client IP for http/https requests.
+webServiceHaProxyProtocolEnabled: false
+
+# Trust X-Forwarded-For header for resolving the client IP for http/https requests. Default is false.
+webServiceTrustXForwardedFor: false
+
+# Add detailed client/remote and server/local addresses and ports to http/https request logging.
+# Defaults to true when either webServiceHaProxyProtocolEnabled or webServiceTrustXForwardedFor is enabled.
+webServiceLogDetailedAddresses: null
+
 # The Configuration metadata store url
 # Examples:
 # * zk:my-zk-1:2181,my-zk-2:2181,my-zk-3:2181

conf/proxy.conf

@@ -60,6 +60,16 @@ advertisedAddress=
 # Enable or disable the HAProxy protocol.
 haProxyProtocolEnabled=false
 
+# Enable or disable the use of HA proxy protocol for resolving the client IP for http/https requests.
+webServiceHaProxyProtocolEnabled=false
+
+# Trust X-Forwarded-For header for resolving the client IP for http/https requests. Default is false.
+webServiceTrustXForwardedFor=false
+
+# Add detailed client/remote and server/local addresses and ports to http/https request logging.
+# Defaults to true when either webServiceHaProxyProtocolEnabled or webServiceTrustXForwardedFor is enabled.
+webServiceLogDetailedAddresses=
+
 # Enables zero-copy transport of data across network interfaces using the splice system call.
 # Zero copy mode cannot be used when TLS is enabled or when proxyLogLevel is > 0.
 proxyZeroCopyModeEnabled=true

conf/standalone.conf

@@ -50,6 +50,16 @@ advertisedAddress=
 # Enable or disable the HAProxy protocol.
 haProxyProtocolEnabled=false
 
+# Enable or disable the use of HA proxy protocol for resolving the client IP for http/https requests.
+webServiceHaProxyProtocolEnabled=false
+
+# Trust X-Forwarded-For header for resolving the client IP for http/https requests. Default is false.
+webServiceTrustXForwardedFor=false
+
+# Add detailed client/remote and server/local addresses and ports to http/https request logging.
+# Defaults to true when either webServiceHaProxyProtocolEnabled or webServiceTrustXForwardedFor is enabled.
+webServiceLogDetailedAddresses=
+
 # Number of threads to use for Netty IO. Default is set to 2 * Runtime.getRuntime().availableProcessors()
 numIOThreads=
 

conf/websocket.conf

@@ -46,6 +46,16 @@ statusFilePath=
 # Hostname or IP address the service binds on, default is 0.0.0.0.
 bindAddress=0.0.0.0
 
+# Enable or disable the use of HA proxy protocol for resolving the client IP for http/https requests.
+webServiceHaProxyProtocolEnabled=false
+
+# Trust X-Forwarded-For header for resolving the client IP for http/https requests. Default is false.
+webServiceTrustXForwardedFor=false
+
+# Add detailed client/remote and server/local addresses and ports to http/https request logging.
+# Defaults to true when either webServiceHaProxyProtocolEnabled or webServiceTrustXForwardedFor is enabled.
+webServiceLogDetailedAddresses=
+
 # Name of the pulsar cluster to connect to
 clusterName=
 

pom.xml

@@ -254,6 +254,7 @@ flexible messaging model and an intuitive client API.</description>
     <jettison.version>1.5.4</jettison.version>
     <woodstox.version>5.4.0</woodstox.version>
     <wiremock.version>2.33.2</wiremock.version>
+    <consolecaptor.version>1.0.3</consolecaptor.version>
 
     <!-- Plugin dependencies -->
     <protobuf-maven-plugin.version>0.6.1</protobuf-maven-plugin.version>

pulsar-broker-common/src/main/java/org/apache/pulsar/broker/ServiceConfiguration.java

@@ -247,6 +247,22 @@ public class ServiceConfiguration implements PulsarConfiguration {
             doc = "Enable or disable the proxy protocol.")
     private boolean haProxyProtocolEnabled;
 
+    @FieldContext(category = CATEGORY_SERVER,
+            doc = "Enable or disable the use of HA proxy protocol for resolving the client IP for http/https "
+                    + "requests. Default is false.")
+    private boolean webServiceHaProxyProtocolEnabled = false;
+
+    @FieldContext(category = CATEGORY_SERVER, doc =
+            "Trust X-Forwarded-For header for resolving the client IP for http/https requests.\n"
+                    + "Default is false.")
+    private boolean webServiceTrustXForwardedFor = false;
+
+    @FieldContext(category = CATEGORY_SERVER, doc =
+            "Add detailed client/remote and server/local addresses and ports to http/https request logging.\n"
+                    + "Defaults to true when either webServiceHaProxyProtocolEnabled or webServiceTrustXForwardedFor "
+                    + "is enabled.")
+    private Boolean webServiceLogDetailedAddresses;
+
     @FieldContext(
             category = CATEGORY_SERVER,
             doc = "Number of threads to use for Netty Acceptor."

pulsar-broker-common/src/main/java/org/apache/pulsar/broker/web/JettyRequestLogFactory.java

@@ -18,9 +18,23 @@
  */
 package org.apache.pulsar.broker.web;
 
+import java.net.InetSocketAddress;
 import java.util.TimeZone;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.atomic.AtomicInteger;
+import lombok.extern.slf4j.Slf4j;
+import org.eclipse.jetty.io.Connection;
+import org.eclipse.jetty.io.EndPoint;
+import org.eclipse.jetty.server.Connector;
 import org.eclipse.jetty.server.CustomRequestLog;
+import org.eclipse.jetty.server.ProxyConnectionFactory;
+import org.eclipse.jetty.server.Request;
+import org.eclipse.jetty.server.RequestLog;
+import org.eclipse.jetty.server.Response;
+import org.eclipse.jetty.server.Server;
 import org.eclipse.jetty.server.Slf4jRequestLogWriter;
+import org.eclipse.jetty.util.HostPort;
+import org.eclipse.jetty.util.component.ContainerLifeCycle;
 
 /**
  * Class to standardize initialization of a Jetty request logger for all pulsar components.
@@ -58,7 +72,184 @@ public class JettyRequestLogFactory {
      * Build a new Jetty request logger using the format defined in this class.
      * @return a request logger
      */
-    public static CustomRequestLog createRequestLogger() {
-        return new CustomRequestLog(new Slf4jRequestLogWriter(), LOG_FORMAT);
+    public static RequestLog createRequestLogger() {
+        return createRequestLogger(false, null);
+    }
+
+    /**
+     * Build a new Jetty request logger using the format defined in this class.
+     * @param showDetailedAddresses whether to show detailed addresses and ports in logs
+     * @return a request logger
+     */
+    public static RequestLog createRequestLogger(boolean showDetailedAddresses, Server server) {
+        if (!showDetailedAddresses) {
+            return new CustomRequestLog(new Slf4jRequestLogWriter(), LOG_FORMAT);
+        } else {
+            return new OriginalClientIPRequestLog(server);
+        }
+    }
+
+    /**
+     * Logs the original and real remote (client) and local (server) IP addresses
+     * when detailed addresses are enabled.
+     * Tracks the real addresses of remote and local using a registered Connection.Listener
+     * when detailed addresses are enabled.
+     * This is necessary when Proxy Protocol is used to pass the original client IP.
+     */
+    @Slf4j
+    private static class OriginalClientIPRequestLog extends ContainerLifeCycle implements RequestLog {
+        private final ThreadLocal<StringBuilder> requestLogStringBuilder = ThreadLocal.withInitial(StringBuilder::new);
+        private final CustomRequestLog delegate;
+        private final Slf4jRequestLogWriter delegateLogWriter;
+
+        OriginalClientIPRequestLog(Server server) {
+            delegate = new CustomRequestLog(this::write, LOG_FORMAT);
+            addBean(delegate);
+            delegateLogWriter = new Slf4jRequestLogWriter();
+            addBean(delegateLogWriter);
+            if (server != null) {
+                for (Connector connector : server.getConnectors()) {
+                    // adding the listener is only necessary for connectors that use ProxyConnectionFactory
+                    if (connector.getDefaultConnectionFactory() instanceof ProxyConnectionFactory) {
+                        connector.addBean(proxyProtocolOriginalEndpointListener);
+                    }
+                }
+            }
+        }
+
+        void write(String requestEntry) {
+            StringBuilder sb = requestLogStringBuilder.get();
+            sb.setLength(0);
+            sb.append(requestEntry);
+        }
+
+        @Override
+        public void log(Request request, Response response) {
+            delegate.log(request, response);
+            StringBuilder sb = requestLogStringBuilder.get();
+            sb.append(" [R:");
+            sb.append(request.getRemoteHost());
+            sb.append(':');
+            sb.append(request.getRemotePort());
+            InetSocketAddress realRemoteAddress = lookupRealAddress(request.getHttpChannel().getRemoteAddress());
+            if (realRemoteAddress != null) {
+                String realRemoteHost = HostPort.normalizeHost(realRemoteAddress.getHostString());
+                int realRemotePort = realRemoteAddress.getPort();
+                if (!realRemoteHost.equals(request.getRemoteHost()) || realRemotePort != request.getRemotePort()) {
+                    sb.append(" via ");
+                    sb.append(realRemoteHost);
+                    sb.append(':');
+                    sb.append(realRemotePort);
+                }
+            }
+            sb.append("]->[L:");
+            InetSocketAddress realLocalAddress = lookupRealAddress(request.getHttpChannel().getLocalAddress());
+            if (realLocalAddress != null) {
+                String realLocalHost = HostPort.normalizeHost(realLocalAddress.getHostString());
+                int realLocalPort = realLocalAddress.getPort();
+                sb.append(realLocalHost);
+                sb.append(':');
+                sb.append(realLocalPort);
+                if (!realLocalHost.equals(request.getLocalAddr()) || realLocalPort != request.getLocalPort()) {
+                    sb.append(" dst ");
+                    sb.append(request.getLocalAddr());
+                    sb.append(':');
+                    sb.append(request.getLocalPort());
+                }
+            } else {
+                sb.append(request.getLocalAddr());
+                sb.append(':');
+                sb.append(request.getLocalPort());
+            }
+            sb.append(']');
+            try {
+                delegateLogWriter.write(sb.toString());
+            } catch (Exception e) {
+                log.warn("Failed to write request log", e);
+            }
+        }
+
+        private InetSocketAddress lookupRealAddress(InetSocketAddress socketAddress) {
+            if (socketAddress == null) {
+                return null;
+            }
+            if (proxyProtocolRealAddressMapping.isEmpty()) {
+                return socketAddress;
+            }
+            AddressEntry entry = proxyProtocolRealAddressMapping.get(new AddressKey(socketAddress.getHostString(),
+                    socketAddress.getPort()));
+            if (entry != null) {
+                return entry.realAddress;
+            } else {
+                return socketAddress;
+            }
+        }
+
+        private final Connection.Listener proxyProtocolOriginalEndpointListener =
+                new ProxyProtocolOriginalEndpointListener();
+
+        private final ConcurrentHashMap<AddressKey, AddressEntry> proxyProtocolRealAddressMapping =
+                new ConcurrentHashMap<>();
+
+        // Use a record as key since InetSocketAddress hash code changes if the address gets resolved
+        record AddressKey(String hostString, int port) {
+
+        }
+
+        record AddressEntry(InetSocketAddress realAddress, AtomicInteger referenceCount) {
+
+        }
+
+        // Tracks the real addresses of remote and local when detailed addresses are enabled.
+        // This is necessary when Proxy Protocol is used to pass the original client IP.
+        // The Proxy Protocol implementation in Jetty wraps the original endpoint with a ProxyEndPoint
+        // and the real endpoint information isn't available in the request object.
+        // This listener is added to all connectors to track the real addresses of the client and server.
+        class ProxyProtocolOriginalEndpointListener implements Connection.Listener {
+            @Override
+            public void onOpened(Connection connection) {
+                handleConnection(connection, true);
+            }
+
+            @Override
+            public void onClosed(Connection connection) {
+                handleConnection(connection, false);
+            }
+
+            private void handleConnection(Connection connection, boolean increment) {
+                if (connection.getEndPoint() instanceof ProxyConnectionFactory.ProxyEndPoint) {
+                    ProxyConnectionFactory.ProxyEndPoint proxyEndPoint =
+                            (ProxyConnectionFactory.ProxyEndPoint) connection.getEndPoint();
+                    EndPoint originalEndpoint = proxyEndPoint.unwrap();
+                    mapAddress(proxyEndPoint.getLocalAddress(), originalEndpoint.getLocalAddress(), increment);
+                    mapAddress(proxyEndPoint.getRemoteAddress(), originalEndpoint.getRemoteAddress(), increment);
+                }
+            }
+
+            private void mapAddress(InetSocketAddress current, InetSocketAddress real, boolean increment) {
+                // don't add the mapping if the current address is the same as the real address
+                if (real != null && current != null && current.equals(real)) {
+                    return;
+                }
+                AddressKey key = new AddressKey(current.getHostString(), current.getPort());
+                proxyProtocolRealAddressMapping.compute(key, (__, entry) -> {
+                    if (entry == null) {
+                        if (increment) {
+                            entry = new AddressEntry(real, new AtomicInteger(1));
+                        }
+                    } else {
+                        if (increment) {
+                            entry.referenceCount.incrementAndGet();
+                        } else {
+                            if (entry.referenceCount.decrementAndGet() == 0) {
+                                // remove the entry if the reference count drops to 0
+                                entry = null;
+                            }
+                        }
+                    }
+                    return entry;
+                });
+            }
+        }
     }
 }

pulsar-broker/pom.xml

@@ -158,6 +158,13 @@
       <scope>test</scope>
     </dependency>
 
+    <dependency>
+      <groupId>io.github.hakky54</groupId>
+      <artifactId>consolecaptor</artifactId>
+      <version>${consolecaptor.version}</version>
+      <scope>test</scope>
+    </dependency>
+
     <!-- zookeeper server -->
     <dependency>
        <groupId>io.dropwizard.metrics</groupId>