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@@ -1504,6 +1504,32 @@
</li>
<li class="chapter " data-level="5.3.5" data-path="../nats_tools/nsc/revocation.html">
<a href="../nats_tools/nsc/revocation.html">
Revocation
</a>
</li>
<li class="chapter " data-level="5.3.6" data-path="../nats_tools/nsc/managed.html">
<a href="../nats_tools/nsc/managed.html">
Managed Operators
</a>
</li>
@@ -2556,11 +2582,12 @@
<p>To monitor the NATS messaging system, <code>nats-server</code> provides a lightweight HTTP server on a dedicated monitoring port.
The monitoring server provides several endpoints, providing statistics and other information about the following:</p>
<ul>
<li><a href="#General-Information">General Server Information</a></li>
<li><a href="#Connection-Information">Connections</a></li>
<li><a href="#Route-Information">Routing</a></li>
<li><a href="#Subscription-Routing-Information">Subscription Routing</a></li>
<li><a href="#Gateway-Information">Gateways</a></li>
<li><a href="#general-information">General Server Information</a></li>
<li><a href="#connection-information">Connections</a></li>
<li><a href="#route-information">Routing</a></li>
<li><a href="#gateway-information">Gateways</a></li>
<li><a href="#leaf-nodes-information">Leaf Nodes</a></li>
<li><a href="#subscription-routing-information">Subscription Routing</a></li>
</ul>
<p>All endpoints return a JSON object.</p>
<p>The NATS monitoring endpoints support JSONP and CORS, making it easy to create single page monitoring web applications.</p>
@@ -2569,11 +2596,11 @@ The monitoring server provides several endpoints, providing statistics and other
<pre class="language-"><code>-m, --http_port PORT HTTP PORT for monitoring
-ms,--https_port PORT Use HTTPS PORT for monitoring
</code></pre><p>Example:</p>
<pre class="language-"><code class="lang-sh">$ nats-server -m 8222
<span class="token punctuation">[</span>4528<span class="token punctuation">]</span> 2019/06/01 20:09:58.572939 <span class="token punctuation">[</span>INF<span class="token punctuation">]</span> Starting nats-server version 2.0.0
<span class="token punctuation">[</span>4528<span class="token punctuation">]</span> 2019/06/01 20:09:58.573007 <span class="token punctuation">[</span>INF<span class="token punctuation">]</span> Starting http monitor on port 8222
<span class="token punctuation">[</span>4528<span class="token punctuation">]</span> 2019/06/01 20:09:58.573071 <span class="token punctuation">[</span>INF<span class="token punctuation">]</span> Listening <span class="token keyword">for</span> client connections on 0.0.0.0:4222
<span class="token punctuation">[</span>4528<span class="token punctuation">]</span> 2019/06/01 20:09:58.573090 <span class="token punctuation">[</span>INF<span class="token punctuation">]</span> nats-server is ready<span class="token operator">&lt;</span>/td<span class="token operator">&gt;</span>
<pre class="language-"><code class="lang-sh">$ nats-server -m <span class="token number">8222</span>
<span class="token punctuation">[</span><span class="token number">4528</span><span class="token punctuation">]</span> <span class="token number">2019</span>/06/01 <span class="token number">20</span>:09:58.572939 <span class="token punctuation">[</span>INF<span class="token punctuation">]</span> Starting nats-server version <span class="token number">2.0</span>.0
<span class="token punctuation">[</span><span class="token number">4528</span><span class="token punctuation">]</span> <span class="token number">2019</span>/06/01 <span class="token number">20</span>:09:58.573007 <span class="token punctuation">[</span>INF<span class="token punctuation">]</span> Starting http monitor on port <span class="token number">8222</span>
<span class="token punctuation">[</span><span class="token number">4528</span><span class="token punctuation">]</span> <span class="token number">2019</span>/06/01 <span class="token number">20</span>:09:58.573071 <span class="token punctuation">[</span>INF<span class="token punctuation">]</span> Listening <span class="token keyword">for</span> client connections on <span class="token number">0.0</span>.0.0:4222
<span class="token punctuation">[</span><span class="token number">4528</span><span class="token punctuation">]</span> <span class="token number">2019</span>/06/01 <span class="token number">20</span>:09:58.573090 <span class="token punctuation">[</span>INF<span class="token punctuation">]</span> nats-server is ready<span class="token operator">&lt;</span>/td<span class="token operator">&gt;</span>
</code></pre>
<p>To test, run <code>nats-server -m 8222</code>, then go to <a href="http://demo.nats.io:8222/" target="_blank">http://demo.nats.io:8222/</a></p>
<h3 id="enable-monitoring-from-the-configuration-file"><a name="enable-monitoring-from-the-configuration-file" class="plugin-anchor" href="#enable-monitoring-from-the-configuration-file"><i class="fa fa-link" aria-hidden="true"></i></a>Enable monitoring from the configuration file</h3>
@@ -2643,6 +2670,7 @@ and tooling.</p>
<span class="token property">&quot;total_connections&quot;</span><span class="token operator">:</span> <span class="token number">0</span><span class="token punctuation">,</span>
<span class="token property">&quot;routes&quot;</span><span class="token operator">:</span> <span class="token number">0</span><span class="token punctuation">,</span>
<span class="token property">&quot;remotes&quot;</span><span class="token operator">:</span> <span class="token number">0</span><span class="token punctuation">,</span>
<span class="token property">&quot;leafnodes&quot;</span><span class="token operator">:</span> <span class="token number">0</span><span class="token punctuation">,</span>
<span class="token property">&quot;in_msgs&quot;</span><span class="token operator">:</span> <span class="token number">0</span><span class="token punctuation">,</span>
<span class="token property">&quot;out_msgs&quot;</span><span class="token operator">:</span> <span class="token number">0</span><span class="token punctuation">,</span>
<span class="token property">&quot;in_bytes&quot;</span><span class="token operator">:</span> <span class="token number">0</span><span class="token punctuation">,</span>
@@ -2920,75 +2948,6 @@ Routes are expected to be low, so there is no paging mechanism with this endpoin
<span class="token punctuation">]</span>
<span class="token punctuation">}</span>
</code></pre>
<h3 id="subscription-routing-information"><a name="subscription-routing-information" class="plugin-anchor" href="#subscription-routing-information"><i class="fa fa-link" aria-hidden="true"></i></a>Subscription Routing Information</h3>
<p>The <code>/subz</code> endpoint reports detailed information about the current subscriptions and the routing data structure. It is not normally used.</p>
<p><strong>Endpoint:</strong> <code>http://server:port/subz</code></p>
<table>
<thead>
<tr>
<th style="text-align:left">Result</th>
<th style="text-align:left">Return Code</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align:left">Success</td>
<td style="text-align:left">200 (OK)</td>
</tr>
<tr>
<td style="text-align:left">Error</td>
<td style="text-align:left">400 (Bad Request)</td>
</tr>
</tbody>
</table>
<h4 id="arguments"><a name="arguments" class="plugin-anchor" href="#arguments"><i class="fa fa-link" aria-hidden="true"></i></a>Arguments</h4>
<table>
<thead>
<tr>
<th style="text-align:left">Argument</th>
<th style="text-align:left">Values</th>
<th style="text-align:left">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align:left">subs</td>
<td style="text-align:left">true, 1, false, 0</td>
<td style="text-align:left">Include subscriptions. Default is false.</td>
</tr>
<tr>
<td style="text-align:left">offset</td>
<td style="text-align:left">integer &gt; 0</td>
<td style="text-align:left">Pagination offset. Default is 0.</td>
</tr>
<tr>
<td style="text-align:left">limit</td>
<td style="text-align:left">integer &gt; 0</td>
<td style="text-align:left">Number of results to return. Default is 1024.</td>
</tr>
<tr>
<td style="text-align:left">test</td>
<td style="text-align:left">subject</td>
<td style="text-align:left">Test whether a subsciption exists.</td>
</tr>
</tbody>
</table>
<h4 id="example"><a name="example" class="plugin-anchor" href="#example"><i class="fa fa-link" aria-hidden="true"></i></a>Example</h4>
<ul>
<li>Get subscription routing information: <a href="http://demo.nats.io:8222/subsz" target="_blank">http://demo.nats.io:8222/subsz</a></li>
</ul>
<h4 id="response"><a name="response" class="plugin-anchor" href="#response"><i class="fa fa-link" aria-hidden="true"></i></a>Response</h4>
<pre class="language-"><code class="lang-json"><span class="token punctuation">{</span>
<span class="token property">&quot;num_subscriptions&quot;</span><span class="token operator">:</span> <span class="token number">2</span><span class="token punctuation">,</span>
<span class="token property">&quot;num_cache&quot;</span><span class="token operator">:</span> <span class="token number">0</span><span class="token punctuation">,</span>
<span class="token property">&quot;num_inserts&quot;</span><span class="token operator">:</span> <span class="token number">2</span><span class="token punctuation">,</span>
<span class="token property">&quot;num_removes&quot;</span><span class="token operator">:</span> <span class="token number">0</span><span class="token punctuation">,</span>
<span class="token property">&quot;num_matches&quot;</span><span class="token operator">:</span> <span class="token number">0</span><span class="token punctuation">,</span>
<span class="token property">&quot;cache_hit_rate&quot;</span><span class="token operator">:</span> <span class="token number">0</span><span class="token punctuation">,</span>
<span class="token property">&quot;max_fanout&quot;</span><span class="token operator">:</span> <span class="token number">0</span><span class="token punctuation">,</span>
<span class="token property">&quot;avg_fanout&quot;</span><span class="token operator">:</span> <span class="token number">0</span>
<span class="token punctuation">}</span>
</code></pre>
<h3 id="gateway-information"><a name="gateway-information" class="plugin-anchor" href="#gateway-information"><i class="fa fa-link" aria-hidden="true"></i></a>Gateway Information</h3>
<p>The <code>/gatewayz</code> endpoint reports information about gateways used to create a NATS supercluster.
Like routes, the number of gateways are expected to be low, so there is no paging mechanism with this endpoint.</p>
@@ -3154,6 +3113,141 @@ Like routes, the number of gateways are expected to be low, so there is no pagin
<span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre>
<h3 id="leaf-nodes-information"><a name="leaf-nodes-information" class="plugin-anchor" href="#leaf-nodes-information"><i class="fa fa-link" aria-hidden="true"></i></a>Leaf Nodes Information</h3>
<p>The <code>/leafz</code> endpoint reports detailed information about the leaf node connections.</p>
<p><strong>Endpoint:</strong> <code>http://server:port/leafz</code></p>
<table>
<thead>
<tr>
<th style="text-align:left">Result</th>
<th style="text-align:left">Return Code</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align:left">Success</td>
<td style="text-align:left">200 (OK)</td>
</tr>
<tr>
<td style="text-align:left">Error</td>
<td style="text-align:left">400 (Bad Request)</td>
</tr>
</tbody>
</table>
<h4 id="arguments"><a name="arguments" class="plugin-anchor" href="#arguments"><i class="fa fa-link" aria-hidden="true"></i></a>Arguments</h4>
<table>
<thead>
<tr>
<th style="text-align:left">Argument</th>
<th style="text-align:left">Values</th>
<th style="text-align:left">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align:left">subs</td>
<td style="text-align:left">true, 1, false, 0</td>
<td style="text-align:left">Include internal subscriptions. Default is false.</td>
</tr>
</tbody>
</table>
<p>As noted above, the <code>leafz</code> endpoint does support the <code>subs</code> argument from the <code>/connz</code> endpoint. For example: <a href="http://demo.nats.io:8222/leafz?subs=1" target="_blank">http://demo.nats.io:8222/leafz?subs=1</a></p>
<h4 id="example"><a name="example" class="plugin-anchor" href="#example"><i class="fa fa-link" aria-hidden="true"></i></a>Example</h4>
<ul>
<li>Get leaf nodes information: <a href="http://demo.nats.io:8222/leafz?subs=1" target="_blank">http://demo.nats.io:8222/leafz?subs=1</a></li>
</ul>
<h4 id="response"><a name="response" class="plugin-anchor" href="#response"><i class="fa fa-link" aria-hidden="true"></i></a>Response</h4>
<pre class="language-"><code class="lang-json"><span class="token punctuation">{</span>
<span class="token property">&quot;server_id&quot;</span><span class="token operator">:</span> <span class="token string">&quot;NC2FJCRMPBE5RI5OSRN7TKUCWQONCKNXHKJXCJIDVSAZ6727M7MQFVT3&quot;</span><span class="token punctuation">,</span>
<span class="token property">&quot;now&quot;</span><span class="token operator">:</span> <span class="token string">&quot;2019-08-27T09:07:05.841132-06:00&quot;</span><span class="token punctuation">,</span>
<span class="token property">&quot;leafnodes&quot;</span><span class="token operator">:</span> <span class="token number">1</span><span class="token punctuation">,</span>
<span class="token property">&quot;leafs&quot;</span><span class="token operator">:</span> <span class="token punctuation">[</span>
<span class="token punctuation">{</span>
<span class="token property">&quot;account&quot;</span><span class="token operator">:</span> <span class="token string">&quot;$G&quot;</span><span class="token punctuation">,</span>
<span class="token property">&quot;ip&quot;</span><span class="token operator">:</span> <span class="token string">&quot;127.0.0.1&quot;</span><span class="token punctuation">,</span>
<span class="token property">&quot;port&quot;</span><span class="token operator">:</span> <span class="token number">6223</span><span class="token punctuation">,</span>
<span class="token property">&quot;rtt&quot;</span><span class="token operator">:</span> <span class="token string">&quot;200&#xB5;s&quot;</span><span class="token punctuation">,</span>
<span class="token property">&quot;in_msgs&quot;</span><span class="token operator">:</span> <span class="token number">0</span><span class="token punctuation">,</span>
<span class="token property">&quot;out_msgs&quot;</span><span class="token operator">:</span> <span class="token number">10000</span><span class="token punctuation">,</span>
<span class="token property">&quot;in_bytes&quot;</span><span class="token operator">:</span> <span class="token number">0</span><span class="token punctuation">,</span>
<span class="token property">&quot;out_bytes&quot;</span><span class="token operator">:</span> <span class="token number">1280000</span><span class="token punctuation">,</span>
<span class="token property">&quot;subscriptions&quot;</span><span class="token operator">:</span> <span class="token number">1</span><span class="token punctuation">,</span>
<span class="token property">&quot;subscriptions_list&quot;</span><span class="token operator">:</span> <span class="token punctuation">[</span>
<span class="token string">&quot;foo&quot;</span>
<span class="token punctuation">]</span>
<span class="token punctuation">}</span>
<span class="token punctuation">]</span>
<span class="token punctuation">}</span>
</code></pre>
<h3 id="subscription-routing-information"><a name="subscription-routing-information" class="plugin-anchor" href="#subscription-routing-information"><i class="fa fa-link" aria-hidden="true"></i></a>Subscription Routing Information</h3>
<p>The <code>/subz</code> endpoint reports detailed information about the current subscriptions and the routing data structure. It is not normally used.</p>
<p><strong>Endpoint:</strong> <code>http://server:port/subz</code></p>
<table>
<thead>
<tr>
<th style="text-align:left">Result</th>
<th style="text-align:left">Return Code</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align:left">Success</td>
<td style="text-align:left">200 (OK)</td>
</tr>
<tr>
<td style="text-align:left">Error</td>
<td style="text-align:left">400 (Bad Request)</td>
</tr>
</tbody>
</table>
<h4 id="arguments"><a name="arguments" class="plugin-anchor" href="#arguments"><i class="fa fa-link" aria-hidden="true"></i></a>Arguments</h4>
<table>
<thead>
<tr>
<th style="text-align:left">Argument</th>
<th style="text-align:left">Values</th>
<th style="text-align:left">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align:left">subs</td>
<td style="text-align:left">true, 1, false, 0</td>
<td style="text-align:left">Include subscriptions. Default is false.</td>
</tr>
<tr>
<td style="text-align:left">offset</td>
<td style="text-align:left">integer &gt; 0</td>
<td style="text-align:left">Pagination offset. Default is 0.</td>
</tr>
<tr>
<td style="text-align:left">limit</td>
<td style="text-align:left">integer &gt; 0</td>
<td style="text-align:left">Number of results to return. Default is 1024.</td>
</tr>
<tr>
<td style="text-align:left">test</td>
<td style="text-align:left">subject</td>
<td style="text-align:left">Test whether a subsciption exists.</td>
</tr>
</tbody>
</table>
<h4 id="example"><a name="example" class="plugin-anchor" href="#example"><i class="fa fa-link" aria-hidden="true"></i></a>Example</h4>
<ul>
<li>Get subscription routing information: <a href="http://demo.nats.io:8222/subsz" target="_blank">http://demo.nats.io:8222/subsz</a></li>
</ul>
<h4 id="response"><a name="response" class="plugin-anchor" href="#response"><i class="fa fa-link" aria-hidden="true"></i></a>Response</h4>
<pre class="language-"><code class="lang-json"><span class="token punctuation">{</span>
<span class="token property">&quot;num_subscriptions&quot;</span><span class="token operator">:</span> <span class="token number">2</span><span class="token punctuation">,</span>
<span class="token property">&quot;num_cache&quot;</span><span class="token operator">:</span> <span class="token number">0</span><span class="token punctuation">,</span>
<span class="token property">&quot;num_inserts&quot;</span><span class="token operator">:</span> <span class="token number">2</span><span class="token punctuation">,</span>
<span class="token property">&quot;num_removes&quot;</span><span class="token operator">:</span> <span class="token number">0</span><span class="token punctuation">,</span>
<span class="token property">&quot;num_matches&quot;</span><span class="token operator">:</span> <span class="token number">0</span><span class="token punctuation">,</span>
<span class="token property">&quot;cache_hit_rate&quot;</span><span class="token operator">:</span> <span class="token number">0</span><span class="token punctuation">,</span>
<span class="token property">&quot;max_fanout&quot;</span><span class="token operator">:</span> <span class="token number">0</span><span class="token punctuation">,</span>
<span class="token property">&quot;avg_fanout&quot;</span><span class="token operator">:</span> <span class="token number">0</span>
<span class="token punctuation">}</span>
</code></pre>
<h2 id="creating-monitoring-applications"><a name="creating-monitoring-applications" class="plugin-anchor" href="#creating-monitoring-applications"><i class="fa fa-link" aria-hidden="true"></i></a>Creating Monitoring Applications</h2>
<p>NATS monitoring endpoints support <a href="https://en.wikipedia.org/wiki/JSONP" target="_blank">JSONP</a> and <a href="https://en.wikipedia.org/wiki/Cross-origin_resource_sharing#How_CORS_works" target="_blank">CORS</a>. You can easily create single page web applications for monitoring. To do this you simply pass the <code>callback</code> query parameter to any endpoint.</p>
<p>For example:</p>
@@ -3209,7 +3303,7 @@ Like routes, the number of gateways are expected to be low, so there is no pagin
<script>
var gitbook = gitbook || [];
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