<!DOCTYPE html><html lang="en"><head><meta charSet="utf-8"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><title>The Pulsar proxy · Apache Pulsar</title><meta name="viewport" content="width=device-width, initial-scale=1.0"/><meta name="generator" content="Docusaurus"/><meta name="description" content="The [Pulsar proxy](/docs/en/2.3.2/concepts-architecture-overview#pulsar-proxy) is an optional gateway that you can run in front of the brokers in a Pulsar cluster. We recommend running a Pulsar proxy in cases when direction connections between clients and Pulsar brokers are either infeasible, undesirable, or both, for example when running Pulsar in a cloud environment or on [Kubernetes](https://kubernetes.io) or an analogous platform."/><meta name="docsearch:version" content="2.3.2"/><meta name="docsearch:language" content="en"/><meta property="og:title" content="The Pulsar proxy · Apache Pulsar"/><meta property="og:type" content="website"/><meta property="og:url" content="https://pulsar.apache.org/"/><meta property="og:description" content="The [Pulsar proxy](/docs/en/2.3.2/concepts-architecture-overview#pulsar-proxy) is an optional gateway that you can run in front of the brokers in a Pulsar cluster. We recommend running a Pulsar proxy in cases when direction connections between clients and Pulsar brokers are either infeasible, undesirable, or both, for example when running Pulsar in a cloud environment or on [Kubernetes](https://kubernetes.io) or an analogous platform."/><meta name="twitter:card" content="summary"/><meta name="twitter:image" content="https://pulsar.apache.org/img/pulsar.svg"/><link rel="shortcut icon" href="/img/pulsar.ico"/><link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/styles/atom-one-dark.min.css"/><link rel="alternate" type="application/atom+xml" href="https://pulsar.apache.org/blog/atom.xml" title="Apache Pulsar Blog ATOM Feed"/><link rel="alternate" type="application/rss+xml" href="https://pulsar.apache.org/blog/feed.xml" title="Apache Pulsar Blog RSS Feed"/><link rel="stylesheet" href="/css/code-blocks-buttons.css"/><script type="text/javascript" src="https://buttons.github.io/buttons.js"></script><script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.0/clipboard.min.js"></script><script type="text/javascript" src="/js/custom.js"></script><script src="/js/scrollSpy.js"></script><link rel="stylesheet" href="/css/main.css"/><script src="/js/codetabs.js"></script></head><body class="sideNavVisible separateOnPageNav"><div class="fixedHeaderContainer"><div class="headerWrapper wrapper"><header><a href="/en"><img class="logo" src="/img/pulsar.svg" alt="Apache Pulsar"/></a><a href="/en/versions"><h3>2.3.2</h3></a><div class="navigationWrapper navigationSlider"><nav class="slidingNav"><ul class="nav-site nav-site-internal"><li class="siteNavGroupActive"><a href="/docs/en/2.3.2/getting-started-standalone" target="_self">Docs</a></li><li class=""><a href="/en/download" target="_self">Download</a></li><li class="siteNavGroupActive"><a href="/docs/en/2.3.2/client-libraries" target="_self">Clients</a></li><li class=""><a href="#restapis" target="_self">REST APIs</a></li><li class=""><a href="#cli" target="_self">Cli</a></li><li class=""><a href="/blog/" target="_self">Blog</a></li><li class=""><a href="#community" target="_self">Community</a></li><li class=""><a href="#apache" target="_self">Apache</a></li><li class=""><a href="https://pulsar-next.staged.apache.org/" target="_self">New Website (Beta)</a></li><span><li><a id="languages-menu" href="#"><img class="languages-icon" src="/img/language.svg" alt="Languages icon"/>English</a><div id="languages-dropdown" class="hide"><ul id="languages-dropdown-items"><li><a href="/docs/ja/2.3.2/administration-proxy">日本語</a></li><li><a href="/docs/fr/2.3.2/administration-proxy">Français</a></li><li><a href="/docs/ko/2.3.2/administration-proxy">한국어</a></li><li><a href="/docs/zh-CN/2.3.2/administration-proxy">中文</a></li><li><a href="/docs/zh-TW/2.3.2/administration-proxy">繁體中文</a></li><li><a href="https://crowdin.com/project/apache-pulsar" target="_blank" rel="noreferrer noopener">Help Translate</a></li></ul></div></li><script>
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<h2><a class="anchor" aria-hidden="true" id="configuring-the-proxy"></a><a href="#configuring-the-proxy" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Configuring the proxy</h2>
<p>The proxy must have some way to find the addresses of the brokers of the cluster. You can do this by either configuring the proxy to connect directly to service discovery or by specifying a broker URL in the configuration.</p>
<h3><a class="anchor" aria-hidden="true" id="option-1-using-service-discovery"></a><a href="#option-1-using-service-discovery" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Option 1: Using service discovery</h3>
<p>Pulsar uses <a href="https://zookeeper.apache.org">ZooKeeper</a> for service discovery. To connect the proxy to ZooKeeper, specify the following in <code>conf/proxy.conf</code>.</p>
<pre><code class="hljs css language-properties"><span class="hljs-attr">zookeeperServers</span>=<span class="hljs-string">zk-0,zk-1,zk-2</span>
<span class="hljs-attr">configurationStoreServers</span>=<span class="hljs-string">zk-0:2184,zk-remote:2184</span>
</code></pre>
<blockquote>
<p>If using service discovery, the network ACL must allow the proxy to talk to the ZooKeeper nodes on the zookeeper client port, which is usually 2181, and on the configuration store client port, which is 2184 by default. Opening the network ACLs means that if someone compromises a proxy, they have full access to ZooKeeper. For this reason, it is more secure to use broker URLs to configure the proxy.</p>
</blockquote>
<h3><a class="anchor" aria-hidden="true" id="option-2-using-broker-urls"></a><a href="#option-2-using-broker-urls" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Option 2: Using broker URLs</h3>
<p>The more secure method of configuring the proxy is to specify a URL to connect to the brokers.</p>
<blockquote>
<p><a href="security-authorization#enabling-authorization-and-assigning-superusers">Authorization</a> at the proxy requires access to ZooKeeper, so if you are using this broker URLs to connect to the brokers, Proxy level authorization should be disabled. Brokers will still authorize requests after the proxy forwards them.</p>
</blockquote>
<p>You can configure the broker URLs in <code>conf/proxy.conf</code> as follows.</p>
<pre><code class="hljs css language-properties"><span class="hljs-attr">brokerServiceURL</span>=<span class="hljs-string">pulsar://brokers.example.com:6650</span>
<span class="hljs-attr">brokerWebServiceURL</span>=<span class="hljs-string">http://brokers.example.com:8080</span>
<span class="hljs-attr">functionWorkerWebServiceURL</span>=<span class="hljs-string">http://function-workers.example.com:8080</span>
</code></pre>
<p>Or if using TLS:</p>
<pre><code class="hljs css language-properties"><span class="hljs-attr">brokerServiceURLTLS</span>=<span class="hljs-string">pulsar+ssl://brokers.example.com:6651</span>
<span class="hljs-attr">brokerWebServiceURLTLS</span>=<span class="hljs-string">https://brokers.example.com:8443</span>
<span class="hljs-attr">functionWorkerWebServiceURL</span>=<span class="hljs-string">https://function-workers.example.com:8443</span>
</code></pre>
<p>The hostname in the URLs provided should be a DNS entry which points to multiple brokers or a Virtual IP which is backed by multiple broker IP addresses so that the proxy does not lose connectivity to the pulsar cluster if a single broker becomes unavailable.</p>
<p>The ports to connect to the brokers (6650 &amp; 8080, or in the case of TLS, 6651 &amp; 8443) should be open in the network ACLs.</p>
<p>Note that if you are not using functions, then <code>functionWorkerWebServiceURL</code> does not need to be configured.</p>
<h2><a class="anchor" aria-hidden="true" id="starting-the-proxy"></a><a href="#starting-the-proxy" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Starting the proxy</h2>
<p>To start the proxy:</p>
<pre><code class="hljs css language-bash">$ <span class="hljs-built_in">cd</span> /path/to/pulsar/directory
$ bin/pulsar proxy
</code></pre>
<blockquote>
<p>You can run as many instances of the Pulsar proxy in a cluster as you would like.</p>
</blockquote>
<h2><a class="anchor" aria-hidden="true" id="stopping-the-proxy"></a><a href="#stopping-the-proxy" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Stopping the proxy</h2>
<p>The Pulsar proxy runs by default in the foreground. To stop the proxy, simply stop the process in which it's running.</p>
<h2><a class="anchor" aria-hidden="true" id="proxy-frontends"></a><a href="#proxy-frontends" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Proxy frontends</h2>
<p>We recommend running the Pulsar proxy behind some kind of load-distributing frontend, such as an <a href="https://www.digitalocean.com/community/tutorials/an-introduction-to-haproxy-and-load-balancing-concepts">HAProxy</a> load balancer.</p>
<h2><a class="anchor" aria-hidden="true" id="using-pulsar-clients-with-the-proxy"></a><a href="#using-pulsar-clients-with-the-proxy" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Using Pulsar clients with the proxy</h2>
<p>Once your Pulsar proxy is up and running, preferably behind a load-distributing <a href="#proxy-frontends">frontend</a>, clients can connect to the proxy via whichever address is used by the frontend. If the address were the DNS address <code>pulsar.cluster.default</code>, for example, then the connection URL for clients would be <code>pulsar://pulsar.cluster.default:6650</code>.</p>
<h2><a class="anchor" aria-hidden="true" id="proxy-configuration"></a><a href="#proxy-configuration" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Proxy configuration</h2>
<p>The Pulsar proxy can be configured using the <a href="/docs/en/2.3.2/reference-configuration#proxy"><code>proxy.conf</code></a> configuration file. The following parameters are available in that file:</p>
<table>
<thead>
<tr><th>Name</th><th>Description</th><th>Default</th></tr>
</thead>
<tbody>
<tr><td>zookeeperServers</td><td>The ZooKeeper quorum connection string (as a comma-separated list)</td><td></td></tr>
<tr><td>configurationStoreServers</td><td>Configuration store connection string (as a comma-separated list)</td><td></td></tr>
<tr><td>zookeeperSessionTimeoutMs</td><td>ZooKeeper session timeout (in milliseconds)</td><td>30000</td></tr>
<tr><td>servicePort</td><td>The port to use for server binary Protobuf requests</td><td>6650</td></tr>
<tr><td>servicePortTls</td><td>The port to use to server binary Protobuf TLS requests</td><td>6651</td></tr>
<tr><td>statusFilePath</td><td>Path for the file used to determine the rotation status for the proxy instance when responding to service discovery health checks</td><td></td></tr>
<tr><td>authenticationEnabled</td><td>Whether authentication is enabled for the Pulsar proxy</td><td>false</td></tr>
<tr><td>authenticationProviders</td><td>Authentication provider name list (a comma-separated list of class names)</td><td></td></tr>
<tr><td>authorizationEnabled</td><td>Whether authorization is enforced by the Pulsar proxy</td><td>false</td></tr>
<tr><td>authorizationProvider</td><td>Authorization provider as a fully qualified class name</td><td>org.apache.pulsar.broker.authorization.PulsarAuthorizationProvider</td></tr>
<tr><td>brokerClientAuthenticationPlugin</td><td>The authentication plugin used by the Pulsar proxy to authenticate with Pulsar brokers</td><td></td></tr>
<tr><td>brokerClientAuthenticationParameters</td><td>The authentication parameters used by the Pulsar proxy to authenticate with Pulsar brokers</td><td></td></tr>
<tr><td>brokerClientTrustCertsFilePath</td><td>The path to trusted certificates used by the Pulsar proxy to authenticate with Pulsar brokers</td><td></td></tr>
<tr><td>superUserRoles</td><td>Role names that are treated as “super-users,” meaning that they will be able to perform all admin</td><td></td></tr>
<tr><td>forwardAuthorizationCredentials</td><td>Whether client authorization credentials are forwarded to the broker for re-authorization. Authentication must be enabled via authenticationEnabled=true for this to take effect.</td><td>false</td></tr>
<tr><td>maxConcurrentInboundConnections</td><td>Max concurrent inbound connections. The proxy will reject requests beyond that.</td><td>10000</td></tr>
<tr><td>maxConcurrentLookupRequests</td><td>Max concurrent outbound connections. The proxy will error out requests beyond that.</td><td>50000</td></tr>
<tr><td>tlsEnabledInProxy</td><td>Whether TLS is enabled for the proxy</td><td>false</td></tr>
<tr><td>tlsEnabledWithBroker</td><td>Whether TLS is enabled when communicating with Pulsar brokers</td><td>false</td></tr>
<tr><td>tlsCertificateFilePath</td><td>Path for the TLS certificate file</td><td></td></tr>
<tr><td>tlsKeyFilePath</td><td>Path for the TLS private key file</td><td></td></tr>
<tr><td>tlsTrustCertsFilePath</td><td>Path for the trusted TLS certificate pem file</td><td></td></tr>
<tr><td>tlsHostnameVerificationEnabled</td><td>Whether the hostname is validated when the proxy creates a TLS connection with brokers</td><td>false</td></tr>
<tr><td>tlsRequireTrustedClientCertOnConnect</td><td>Whether client certificates are required for TLS. Connections are rejected if the client certificate isn’t trusted.</td><td>false</td></tr>
</tbody>
</table>
</span></div></article></div><div class="docs-prevnext"><a class="docs-prev button" href="/docs/en/2.3.2/administration-load-balance"><span class="arrow-prev">← </span><span>Load balance</span></a><a class="docs-next button" href="/docs/en/2.3.2/security-overview"><span>Overview</span><span class="arrow-next"> →</span></a></div></div></div><nav class="onPageNav"><ul class="toc-headings"><li><a href="#configuring-the-proxy">Configuring the proxy</a><ul class="toc-headings"><li><a href="#option-1-using-service-discovery">Option 1: Using service discovery</a></li><li><a href="#option-2-using-broker-urls">Option 2: Using broker URLs</a></li></ul></li><li><a href="#starting-the-proxy">Starting the proxy</a></li><li><a href="#stopping-the-proxy">Stopping the proxy</a></li><li><a href="#proxy-frontends">Proxy frontends</a></li><li><a href="#using-pulsar-clients-with-the-proxy">Using Pulsar clients with the proxy</a></li><li><a href="#proxy-configuration">Proxy configuration</a></li></ul></nav></div><footer class="nav-footer" id="footer"><section class="copyright">Copyright © 2022 The Apache Software Foundation. All Rights Reserved. Apache, Apache Pulsar and the Apache feather logo are trademarks of The Apache Software Foundation.</section><span><script>
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