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| <p>The <strong>Heron Explorer</strong> is a CLI tool that you can use to gain insight into a Heron installation, including:</p> |
| <ul> |
| <li>which clusters are currently running in the installation</li> |
| <li>information about a given topology's components (spouts and bolts)</li> |
| <li>metrics for a topology</li> |
| <li>the containers in which a topology is running</li> |
| <li>the topologies running in a given cluster, role, or environment</li> |
| </ul> |
| <blockquote> |
| <h4><a class="anchor" aria-hidden="true" id="the-heron-explorer-vs-heron-cli"></a><a href="#the-heron-explorer-vs-heron-cli" 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>The Heron Explorer vs. Heron CLI</h4> |
| <p>There are two important differences between the Heron Explorer and <a href="user-manuals-heron-cli">Heron CLI</a>. Unlike Heron CLI, the Heron Explorer (a) requires the <a href="user-manuals-heron-tracker-runbook">Heron Tracker</a> and (b) performs read-only, observation-oriented commands (rather than commands for actions like submitting, activating, and killing topologies).</p> |
| </blockquote> |
| <p>In order to use the Heron Explorer, the <a href="user-manuals-heron-tracker-runbook">Heron Tracker</a> will need to be running. If you've <a href="getting-started-local-single-node">installed the Tracker</a>, you can start it up using just one command:</p> |
| <pre><code class="hljs css language-shell"><span class="hljs-meta">$</span><span class="bash"> heron-tracker</span> |
| </code></pre> |
| <h2><a class="anchor" aria-hidden="true" id="installation"></a><a href="#installation" 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>Installation</h2> |
| <p>The Heron Explorer is installed automatically if you follow the Heron tools installation tutorial in the <a href="getting-started-local-single-node#step-1-download-the-heron-tools">Quick Start Guide</a>. |
| x</p> |
| <h2><a class="anchor" aria-hidden="true" id="commands"></a><a href="#commands" 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>Commands</h2> |
| <p>The commands available for the Heron Explorer are listed in the table below.</p> |
| <table> |
| <thead> |
| <tr><th style="text-align:left">Command</th><th style="text-align:left">Action</th><th style="text-align:left">Arguments</th></tr> |
| </thead> |
| <tbody> |
| <tr><td style="text-align:left"><a href="#clusters"><code>clusters</code></a></td><td style="text-align:left">Lists all currently available Heron clusters</td><td style="text-align:left">None</td></tr> |
| <tr><td style="text-align:left"><a href="#components"><code>components</code></a></td><td style="text-align:left">Displays information about a topology's spout and bolt components, including each component's inputs and outputs (if any) and parallelism</td><td style="text-align:left"><code>[cluster]/[role]/[env] [topology-name] [options]</code></td></tr> |
| <tr><td style="text-align:left"><a href="#metrics"><code>metrics</code></a></td><td style="text-align:left">Displays metrics for a topology</td><td style="text-align:left"><code>[cluster]/[role]/[env] [topology-name] [options]</code></td></tr> |
| <tr><td style="text-align:left"><a href="#containers"><code>containers</code></a></td><td style="text-align:left">Displays all of the containers in which a topology is running</td><td style="text-align:left"><code>[cluster]/[role]/[env] [topology-name] [options]</code></td></tr> |
| <tr><td style="text-align:left"><a href="#topologies"><code>topologies</code></a></td><td style="text-align:left">Displays all topologies currently running in the specified cluster, cluster/role, or cluster/role/env</td><td style="text-align:left"><code>[cluster]/[role]/[env] [topology-name] [options]</code></td></tr> |
| </tbody> |
| </table> |
| <p>In addition to these commands, you can get help output by running <code>heron-explorer help</code> and the current version of Heron Explorer by running <code>heron-explorer version</code>.</p> |
| <h2><a class="anchor" aria-hidden="true" id="cluster-role-and-environment"></a><a href="#cluster-role-and-environment" 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>Cluster, role, and environment</h2> |
| <p>To use a topology about which you'd like to gather information using Heron Explorer, you need to supply one of the following:</p> |
| <ul> |
| <li>the cluster name</li> |
| <li>the cluster name and role</li> |
| <li>the cluster name, role, and environment</li> |
| </ul> |
| <p>Here are three examples corresponding to the options above:</p> |
| <pre><code class="hljs css language-bash">$ heron-explorer topologies <span class="hljs-built_in">local</span> |
| $ heron-explorer topologies us-west/finance |
| $ heron-explorer topologies asia-1/iot/devel |
| </code></pre> |
| <h2><a class="anchor" aria-hidden="true" id="clusters"></a><a href="#clusters" 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>Clusters</h2> |
| <p>The <code>clusters</code> command lists all of the clusters running in the Heron installation. It takes no arguments.</p> |
| <p>Here's an example command and output:</p> |
| <pre><code class="hljs css language-bash">$ heron-explorer clusters |
| Available clusters: |
| <span class="hljs-built_in">local</span> |
| </code></pre> |
| <h2><a class="anchor" aria-hidden="true" id="components"></a><a href="#components" 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>Components</h2> |
| <p>The <code>components</code> command lists information about all of a topology's components (spouts and bolts), including:</p> |
| <ul> |
| <li>the type of the component (either <code>spout</code> or <code>bolt</code>)</li> |
| <li>the name of the component</li> |
| <li>the parallelism hint for the component</li> |
| <li>the inputs and outputs for the component</li> |
| </ul> |
| <p>Here's an example command and output:</p> |
| <pre><code class="hljs css language-bash">$ heron-explorer components \ |
| us-east/analytics/staging \ |
| ClickCounterTopology |
| <span class="hljs-built_in">type</span> name parallelism input output |
| ------ ------------- ------------- --------------------- ------------- |
| spout click-ingest 2 - click-counter |
| bolt click-counter 2 - click-ingest persist-to-db |
| </code></pre> |
| <h2><a class="anchor" aria-hidden="true" id="metrics"></a><a href="#metrics" 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>Metrics</h2> |
| <p>The <code>metrics</code> command lists a wide variety of metrics about each component in a topology:</p> |
| <ul> |
| <li>the container in which the component is running</li> |
| <li>the JVM uptime for the component (in seconds)</li> |
| <li>the JVM process CPU load for the component (as a %)</li> |
| <li>the total JVM memory used by the component (in megabytes)</li> |
| <li>the component's emit, ack, and fail counts</li> |
| </ul> |
| <p>Here's an example command:</p> |
| <pre><code class="hljs css language-bash">$ heron-explorer metrics \ |
| us-east/analytics/staging \ |
| ClickCounterTopology |
| </code></pre> |
| <p>And here's some example output:</p> |
| <pre><code class="hljs css language-bash"><span class="hljs-string">'click-ingest'</span> metrics: |
| container id jvm-uptime-secs jvm-process-cpu-load jvm-memory-used-mb emit-count ack-count fail-count |
| -------------------------- ----------------- ---------------------- -------------------- ------------ ----------- ------------ |
| container_1_click-ingest_1 1012 0.510003 83 2.81582e+07 0 0 |
| container_2_click-ingest_2 1012 0.467 71 2.34582e+07 0 0 |
| |
| <span class="hljs-string">'click-counter'</span> metrics: |
| container id jvm-uptime-secs jvm-process-cpu-load jvm-memory-used-mb emit-count ack-count fail-count |
| ---------------------------- ----------------- ---------------------- -------------------- ------------ ----------- ------------ |
| container_1_click-counter_1 1012 0.5201 83 2.81432e+07 0 0 |
| container_2_click-counter_2 1012 0.481 71 2.14896e+07 0 0 |
| </code></pre> |
| <h2><a class="anchor" aria-hidden="true" id="containers"></a><a href="#containers" 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>Containers</h2> |
| <p>The <code>containers</code> command lists all of the containers in which a topology is running, and provides the following information about each container:</p> |
| <ul> |
| <li>The ID of the container</li> |
| <li>The host on which the container is running as well as the port it's using</li> |
| <li>A process ID (pid) for the container</li> |
| <li>The number of bolts, spouts, and total component instances</li> |
| </ul> |
| <p>Here's an example command:</p> |
| <pre><code class="hljs css language-bash">$ heron-explorer containers \ |
| us-east/analytics/staging \ |
| ClickCounterTopology |
| </code></pre> |
| <p>And here's some example output:</p> |
| <pre><code class="hljs css language-bash"> container host port pid <span class="hljs-comment">#bolt #spout #instance</span> |
| ----------- ----------------- ------ ----- ------- -------- ----------- |
| 1 us-west.1.acme.com 62915 47893 1 1 1 |
| 2 us-west.2.acme.com 62147 14390 1 1 1 |
| </code></pre> |
| <h2><a class="anchor" aria-hidden="true" id="topologies"></a><a href="#topologies" 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>Topologies</h2> |
| <p>The <code>topologies</code> command lists all topologies for one of the following:</p> |
| <ul> |
| <li>cluster</li> |
| <li>cluster and role</li> |
| <li>cluster, role, and environment</li> |
| </ul> |
| <p>Here's an example command and output:</p> |
| <pre><code class="hljs css language-bash">$ heron-explorer \ |
| us-east/analytics/staging |
| Topologies running <span class="hljs-keyword">in</span> cluster <span class="hljs-string">'us-east/analytics/staging'</span> |
| role env topology |
| --------- ------- ------------------------- |
| analytics staging ClickCounterTopology |
| </code></pre> |
| </span></div></article></div><div class="docs-prevnext"><a class="docs-prev button" href="/docs/0.20.4-incubating/user-manuals-heron-cli"><span class="arrow-prev">← </span><span>Heron Client</span></a><a class="docs-next button" href="/docs/0.20.4-incubating/user-manuals-tracker-rest"><span>Heron Tracker REST API</span><span class="arrow-next"> →</span></a></div></div></div><nav class="onPageNav"><ul class="toc-headings"><li><a href="#installation">Installation</a></li><li><a href="#commands">Commands</a></li><li><a href="#cluster-role-and-environment">Cluster, role, and environment</a></li><li><a href="#clusters">Clusters</a></li><li><a href="#components">Components</a></li><li><a href="#metrics">Metrics</a></li><li><a href="#containers">Containers</a></li><li><a href="#topologies">Topologies</a></li></ul></nav></div><footer class="nav-footer" id="footer"><div class="apache-disclaimer">Apache Heron is an effort undergoing incubation at <a target="_blank" href="https://apache.org/">The Apache Software Foundation (ASF)</a> sponsored by the Apache Incubator PMC. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.<br/><br/>Apache®, the names of Apache projects, and the feather logo are either <a rel="external" href="https://www.apache.org/foundation/marks/list/">registered trademarks or trademarks</a> of the Apache Software Foundation in the United States and/or other countries.<br/><br/><div class="copyright-box">Copyright © 2022 the Apache Software Foundation, Apache Heron, Heron, |
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