Added: aurora/site/publish/documentation/0.18.0/features/custom-executors/index.html URL: http://svn.apache.org/viewvc/aurora/site/publish/documentation/0.18.0/features/custom-executors/index.html?rev=1799392&view=auto ============================================================================== --- aurora/site/publish/documentation/0.18.0/features/custom-executors/index.html (added) +++ aurora/site/publish/documentation/0.18.0/features/custom-executors/index.html Wed Jun 21 06:36:21 2017 @@ -0,0 +1,375 @@ +<!DOCTYPE html> +<html lang="en"> + <head> + <meta charset="utf-8"> + <meta name="viewport" content="width=device-width, initial-scale=1"> + <title>Apache Aurora</title> + <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css";> + <link href="/assets/css/main.css" rel="stylesheet"> + <!-- Analytics --> + <script type="text/javascript"> + var _gaq = _gaq || []; + _gaq.push(['_setAccount', 'UA-45879646-1']); + _gaq.push(['_setDomainName', 'apache.org']); + _gaq.push(['_trackPageview']); + + (function() { + var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; + ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; + var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); + })(); + </script> + </head> + <body> + <div class="container-fluid section-header"> + <div class="container"> + <div class="nav nav-bar"> + <a href="/"><img src="/assets/img/aurora_logo_dkbkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a> + <ul class="nav navbar-nav navbar-right"> + <li><a href="/documentation/latest/">Documentation</a></li> + <li><a href="/community/">Community</a></li> + <li><a href="/downloads/">Downloads</a></li> + <li><a href="/blog/">Blog</a></li> + </ul> + </div> + </div> +</div> + + <div class="container-fluid"> + <div class="container content"> + <div class="col-md-12 documentation"> +<h5 class="page-header text-uppercase">Documentation +<select onChange="window.location.href='/documentation/' + this.value + '/features/custom-executors/'" + value="0.18.0"> + <option value="0.18.0" + selected="selected"> + 0.18.0 + (latest) + </option> + <option value="0.17.0" + > + 0.17.0 + </option> + <option value="0.16.0" + > + 0.16.0 + </option> + <option value="0.15.0" + > + 0.15.0 + </option> + <option value="0.14.0" + > + 0.14.0 + </option> + <option value="0.13.0" + > + 0.13.0 + </option> + <option value="0.12.0" + > + 0.12.0 + </option> + <option value="0.11.0" + > + 0.11.0 + </option> + <option value="0.10.0" + > + 0.10.0 + </option> + <option value="0.9.0" + > + 0.9.0 + </option> + <option value="0.8.0" + > + 0.8.0 + </option> + <option value="0.7.0-incubating" + > + 0.7.0-incubating + </option> + <option value="0.6.0-incubating" + > + 0.6.0-incubating + </option> + <option value="0.5.0-incubating" + > + 0.5.0-incubating + </option> +</select> +</h5> +<h1 id="custom-executors">Custom Executors</h1> + +<p>If the need arises to use a Mesos executor other than the Thermos executor, the scheduler can be +configured to utilize a custom executor by specifying the <code>-custom_executor_config</code> flag. +The flag must be set to the path of a valid executor configuration file.</p> + +<p>The configuration file must be a valid <strong>JSON array</strong> and contain, at minimum, +one executor configuration including the name, command and resources fields and +must be pointed to by the <code>-custom_executor_config</code> flag when the scheduler is +started.</p> + +<h3 id="array-entry">Array Entry</h3> + +<table><thead> +<tr> +<th>Property</th> +<th>Description</th> +</tr> +</thead><tbody> +<tr> +<td>executor (required)</td> +<td>Description of executor.</td> +</tr> +<tr> +<td>task_prefix (required) )</td> +<td>Prefix given to tasks launched with this executor’s configuration.</td> +</tr> +<tr> +<td>volume_mounts (optional)</td> +<td>Volumes to be mounted in container running executor.</td> +</tr> +</tbody></table> + +<h4 id="executor">executor</h4> + +<table><thead> +<tr> +<th>Property</th> +<th>Description</th> +</tr> +</thead><tbody> +<tr> +<td>name (required)</td> +<td>Name of the executor.</td> +</tr> +<tr> +<td>command (required)</td> +<td>How to run the executor.</td> +</tr> +<tr> +<td>resources (required)</td> +<td>Overhead to use for each executor instance.</td> +</tr> +</tbody></table> + +<h4 id="command">command</h4> + +<table><thead> +<tr> +<th>Property</th> +<th>Description</th> +</tr> +</thead><tbody> +<tr> +<td>value (required)</td> +<td>The command to execute.</td> +</tr> +<tr> +<td>arguments (optional)</td> +<td>A list of arguments to pass to the command.</td> +</tr> +<tr> +<td>uris (optional)</td> +<td>List of resources to download into the task sandbox.</td> +</tr> +<tr> +<td>shell (optional)</td> +<td>Run executor via shell.</td> +</tr> +</tbody></table> + +<p>A note on the command property (from <a href="https://github.com/apache/mesos/blob/master/include/mesos/mesos.proto";>mesos.proto</a>):</p> +<pre class="highlight plaintext"><code>1) If 'shell == true', the command will be launched via shell + (i.e., /bin/sh -c 'value'). The 'value' specified will be + treated as the shell command. The 'arguments' will be ignored. +2) If 'shell == false', the command will be launched by passing + arguments to an executable. The 'value' specified will be + treated as the filename of the executable. The 'arguments' + will be treated as the arguments to the executable. This is + similar to how POSIX exec families launch processes (i.e., + execlp(value, arguments(0), arguments(1), ...)). +</code></pre> + +<h5 id="uris-list">uris (list)</h5> + +<ul> +<li>Follows the <a href="http://mesos.apache.org/documentation/latest/fetcher/";>Mesos Fetcher schema</a></li> +</ul> + +<table><thead> +<tr> +<th>Property</th> +<th>Description</th> +</tr> +</thead><tbody> +<tr> +<td>value (required)</td> +<td>Path to the resource needed in the sandbox.</td> +</tr> +<tr> +<td>executable (optional)</td> +<td>Change resource to be executable via chmod.</td> +</tr> +<tr> +<td>extract (optional)</td> +<td>Extract files from packed or compressed archives into the sandbox.</td> +</tr> +<tr> +<td>cache (optional)</td> +<td>Use caching mechanism provided by Mesos for resources.</td> +</tr> +</tbody></table> + +<h4 id="resources-list">resources (list)</h4> + +<table><thead> +<tr> +<th>Property</th> +<th>Description</th> +</tr> +</thead><tbody> +<tr> +<td>name (required)</td> +<td>Name of the resource: cpus or mem.</td> +</tr> +<tr> +<td>type (required)</td> +<td>Type of resource. Should always be SCALAR.</td> +</tr> +<tr> +<td>scalar (required)</td> +<td>Value in float for cpus or int for mem (in MBs)</td> +</tr> +</tbody></table> + +<h3 id="volume_mounts-list">volume_mounts (list)</h3> + +<table><thead> +<tr> +<th>Property</th> +<th>Description</th> +</tr> +</thead><tbody> +<tr> +<td>host_path (required)</td> +<td>Host path to mount inside the container.</td> +</tr> +<tr> +<td>container_path (required)</td> +<td>Path inside the container where <code>host_path</code> will be mounted.</td> +</tr> +<tr> +<td>mode (required)</td> +<td>Mode in which to mount the volume, Read-Write (RW) or Read-Only (RO).</td> +</tr> +</tbody></table> + +<p>A sample configuration is as follows:</p> +<pre class="highlight json"><code><span style="background-color: #f8f8f8">[</span><span style="color: #bbbbbb"> + </span><span style="background-color: #f8f8f8">{</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"executor"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="background-color: #f8f8f8">{</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"name"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="color: #d14">"myExecutor"</span><span style="background-color: #f8f8f8">,</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"command"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="background-color: #f8f8f8">{</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"value"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="color: #d14">"myExecutor.a"</span><span style="background-color: #f8f8f8">,</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"shell"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="color: #d14">"false"</span><span style="background-color: #f8f8f8">,</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"arguments"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="background-color: #f8f8f8">[</span><span style="color: #bbbbbb"> + </span><span style="color: #d14">"localhost:2181"</span><span style="background-color: #f8f8f8">,</span><span style="color: #bbbbbb"> + </span><span style="color: #d14">"-verbose"</span><span style="background-color: #f8f8f8">,</span><span style="color: #bbbbbb"> + </span><span style="color: #d14">"-config myConfiguration.config"</span><span style="color: #bbbbbb"> + </span><span style="background-color: #f8f8f8">],</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"uris"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="background-color: #f8f8f8">[</span><span style="color: #bbbbbb"> + </span><span style="background-color: #f8f8f8">{</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"value"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="color: #d14">"/dist/myExecutor.a"</span><span style="background-color: #f8f8f8">,</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"executable"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="color: #000000;font-weight: bold">true</span><span style="background-color: #f8f8f8">,</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"extract"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="color: #000000;font-weight: bold">false</span><span style="background-color: #f8f8f8">,</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"cache"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="color: #000000;font-weight: bold">true</span><span style="color: #bbbbbb"> + </span><span style="background-color: #f8f8f8">},</span><span style="color: #bbbbbb"> + </span><span style="background-color: #f8f8f8">{</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"value"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="color: #d14">"/home/user/myConfiguration.config"</span><span style="background-color: #f8f8f8">,</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"executable"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="color: #000000;font-weight: bold">false</span><span style="background-color: #f8f8f8">,</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"extract"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="color: #000000;font-weight: bold">false</span><span style="background-color: #f8f8f8">,</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"cache"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="color: #000000;font-weight: bold">false</span><span style="color: #bbbbbb"> + </span><span style="background-color: #f8f8f8">}</span><span style="color: #bbbbbb"> + </span><span style="background-color: #f8f8f8">]</span><span style="color: #bbbbbb"> + </span><span style="background-color: #f8f8f8">},</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"resources"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="background-color: #f8f8f8">[</span><span style="color: #bbbbbb"> + </span><span style="background-color: #f8f8f8">{</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"name"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="color: #d14">"cpus"</span><span style="background-color: #f8f8f8">,</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"type"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="color: #d14">"SCALAR"</span><span style="background-color: #f8f8f8">,</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"scalar"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="background-color: #f8f8f8">{</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"value"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="color: #009999">1.00</span><span style="color: #bbbbbb"> + </span><span style="background-color: #f8f8f8">}</span><span style="color: #bbbbbb"> + </span><span style="background-color: #f8f8f8">},</span><span style="color: #bbbbbb"> + </span><span style="background-color: #f8f8f8">{</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"name"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="color: #d14">"mem"</span><span style="background-color: #f8f8f8">,</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"type"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="color: #d14">"SCALAR"</span><span style="background-color: #f8f8f8">,</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"scalar"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="background-color: #f8f8f8">{</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"value"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="color: #009999">512</span><span style="color: #bbbbbb"> + </span><span style="background-color: #f8f8f8">}</span><span style="color: #bbbbbb"> + </span><span style="background-color: #f8f8f8">}</span><span style="color: #bbbbbb"> + </span><span style="background-color: #f8f8f8">]</span><span style="color: #bbbbbb"> + </span><span style="background-color: #f8f8f8">},</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"volume_mounts"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="background-color: #f8f8f8">[</span><span style="color: #bbbbbb"> + </span><span style="background-color: #f8f8f8">{</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"mode"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="color: #d14">"RO"</span><span style="background-color: #f8f8f8">,</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"container_path"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="color: #d14">"/path/on/container"</span><span style="background-color: #f8f8f8">,</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"host_path"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="color: #d14">"/path/to/host/directory"</span><span style="color: #bbbbbb"> + </span><span style="background-color: #f8f8f8">},</span><span style="color: #bbbbbb"> + </span><span style="background-color: #f8f8f8">{</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"mode"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="color: #d14">"RW"</span><span style="background-color: #f8f8f8">,</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"container_path"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="color: #d14">"/container"</span><span style="background-color: #f8f8f8">,</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"host_path"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="color: #d14">"/host"</span><span style="color: #bbbbbb"> + </span><span style="background-color: #f8f8f8">}</span><span style="color: #bbbbbb"> + </span><span style="background-color: #f8f8f8">],</span><span style="color: #bbbbbb"> + </span><span style="color: #000080">"task_prefix"</span><span style="background-color: #f8f8f8">:</span><span style="color: #bbbbbb"> </span><span style="color: #d14">"my-executor-"</span><span style="color: #bbbbbb"> + </span><span style="background-color: #f8f8f8">}</span><span style="color: #bbbbbb"> +</span><span style="background-color: #f8f8f8">]</span><span style="color: #bbbbbb"> +</span></code></pre> + +<p>It should be noted that if you do not use Thermos or a Thermos based executor, links in the scheduler’s +Web UI for tasks will not work (at least for the time being). +Some information about launched tasks can still be accessed via the Mesos Web UI or via the Aurora Client.</p> + +<h3 id="using-a-custom-executor">Using a custom executor</h3> + +<p>At this time, it is not currently possible create a job that runs on a custom executor using the default +Aurora client. To allow the scheduler to pick the correct executor, the <code>JobConfiguration.TaskConfig.ExecutorConfig.name</code> +field must be set to match the name used in the custom executor configuration blob. (e.g. to run a job using myExecutor, +<code>JobConfiguration.TaskConfig.ExecutorConfig.name</code> must be set to <code>myExecutor</code>). While support for modifying +this field in Pystachio created, the easiest way to launch jobs with custom executors is to use +an existing custom Client such as <a href="https://github.com/rdelval/gorealis";>gorealis</a>.</p> + +</div> + + </div> + </div> + <div class="container-fluid section-footer buffer"> + <div class="container"> + <div class="row"> + <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3> + <ul> + <li><a href="/downloads/">Downloads</a></li> + <li><a href="/community/">Mailing Lists</a></li> + <li><a href="http://issues.apache.org/jira/browse/AURORA";>Issue Tracking</a></li> + <li><a href="/documentation/latest/contributing/">How To Contribute</a></li> + </ul> + </div> + <div class="col-md-2"><h3>The ASF</h3> + <ul> + <li><a href="http://www.apache.org/licenses/";>License</a></li> + <li><a href="http://www.apache.org/foundation/sponsorship.html";>Sponsorship</a></li> + <li><a href="http://www.apache.org/foundation/thanks.html";>Thanks</a></li> + <li><a href="http://www.apache.org/security/";>Security</a></li> + </ul> + </div> + <div class="col-md-6"> + <p class="disclaimer">© 2014-2017 <a href="http://www.apache.org/";>Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/";>Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/";>Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/";>Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p> + </div> + </div> + </div> + + </body> +</html>
Added: aurora/site/publish/documentation/0.18.0/features/job-updates/index.html URL: http://svn.apache.org/viewvc/aurora/site/publish/documentation/0.18.0/features/job-updates/index.html?rev=1799392&view=auto ============================================================================== --- aurora/site/publish/documentation/0.18.0/features/job-updates/index.html (added) +++ aurora/site/publish/documentation/0.18.0/features/job-updates/index.html Wed Jun 21 06:36:21 2017 @@ -0,0 +1,239 @@ +<!DOCTYPE html> +<html lang="en"> + <head> + <meta charset="utf-8"> + <meta name="viewport" content="width=device-width, initial-scale=1"> + <title>Apache Aurora</title> + <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css";> + <link href="/assets/css/main.css" rel="stylesheet"> + <!-- Analytics --> + <script type="text/javascript"> + var _gaq = _gaq || []; + _gaq.push(['_setAccount', 'UA-45879646-1']); + _gaq.push(['_setDomainName', 'apache.org']); + _gaq.push(['_trackPageview']); + + (function() { + var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; + ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; + var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); + })(); + </script> + </head> + <body> + <div class="container-fluid section-header"> + <div class="container"> + <div class="nav nav-bar"> + <a href="/"><img src="/assets/img/aurora_logo_dkbkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a> + <ul class="nav navbar-nav navbar-right"> + <li><a href="/documentation/latest/">Documentation</a></li> + <li><a href="/community/">Community</a></li> + <li><a href="/downloads/">Downloads</a></li> + <li><a href="/blog/">Blog</a></li> + </ul> + </div> + </div> +</div> + + <div class="container-fluid"> + <div class="container content"> + <div class="col-md-12 documentation"> +<h5 class="page-header text-uppercase">Documentation +<select onChange="window.location.href='/documentation/' + this.value + '/features/job-updates/'" + value="0.18.0"> + <option value="0.18.0" + selected="selected"> + 0.18.0 + (latest) + </option> + <option value="0.17.0" + > + 0.17.0 + </option> + <option value="0.16.0" + > + 0.16.0 + </option> + <option value="0.15.0" + > + 0.15.0 + </option> + <option value="0.14.0" + > + 0.14.0 + </option> + <option value="0.13.0" + > + 0.13.0 + </option> + <option value="0.12.0" + > + 0.12.0 + </option> + <option value="0.11.0" + > + 0.11.0 + </option> + <option value="0.10.0" + > + 0.10.0 + </option> + <option value="0.9.0" + > + 0.9.0 + </option> + <option value="0.8.0" + > + 0.8.0 + </option> + <option value="0.7.0-incubating" + > + 0.7.0-incubating + </option> + <option value="0.6.0-incubating" + > + 0.6.0-incubating + </option> + <option value="0.5.0-incubating" + > + 0.5.0-incubating + </option> +</select> +</h5> +<h1 id="aurora-job-updates">Aurora Job Updates</h1> + +<p><code>Job</code> configurations can be updated at any point in their lifecycle. +Usually updates are done incrementally using a process called a <em>rolling +upgrade</em>, in which Tasks are upgraded in small groups, one group at a +time. Updates are done using various Aurora Client commands.</p> + +<h2 id="rolling-job-updates">Rolling Job Updates</h2> + +<p>There are several sub-commands to manage job updates:</p> +<pre class="highlight plaintext"><code>aurora update start <job key> <configuration file> +aurora update info <job key> +aurora update pause <job key> +aurora update resume <job key> +aurora update abort <job key> +aurora update list <cluster> +</code></pre> + +<p>When you <code>start</code> a job update, the command will return once it has sent the +instructions to the scheduler. At that point, you may view detailed +progress for the update with the <code>info</code> subcommand, in addition to viewing +graphical progress in the web browser. You may also get a full listing of +in-progress updates in a cluster with <code>list</code>.</p> + +<p>Once an update has been started, you can <code>pause</code> to keep the update but halt +progress. This can be useful for doing things like debug a partially-updated +job to determine whether you would like to proceed. You can <code>resume</code> to +proceed.</p> + +<p>You may <code>abort</code> a job update regardless of the state it is in. This will +instruct the scheduler to completely abandon the job update and leave the job +in the current (possibly partially-updated) state.</p> + +<p>For a configuration update, the Aurora Scheduler calculates required changes +by examining the current job config state and the new desired job config. +It then starts a <em>rolling batched update process</em> by going through every batch +and performing these operations, in order:</p> + +<ul> +<li>If an instance is not present in the scheduler but is present in +the new config, then the instance is created.</li> +<li>If an instance is present in both the scheduler and the new config, then +the scheduler diffs both task configs. If it detects any changes, it +performs an instance update by killing the old config instance and adds +the new config instance.</li> +<li>If an instance is present in the scheduler but isn’t in the new config, +then that instance is killed.</li> +</ul> + +<p>The Aurora Scheduler continues through the instance list until all tasks are +updated and in <code>RUNNING</code>. If the scheduler determines the update is not going +well (based on the criteria specified in the UpdateConfig), it cancels the update.</p> + +<p>Update cancellation runs a procedure similar to the described above +update sequence, but in reverse order. New instance configs are swapped +with old instance configs and batch updates proceed backwards +from the point where the update failed. E.g.; (0,1,2) (3,4,5) (6,7, +8-FAIL) results in a rollback in order (8,7,6) (5,4,3) (2,1,0).</p> + +<p>For details on how to control a job update, please see the +<a href="../../reference/configuration/#updateconfig-objects">UpdateConfig</a> configuration object.</p> + +<h2 id="coordinated-job-updates">Coordinated Job Updates</h2> + +<p>Some Aurora services may benefit from having more control over updates by explicitly +acknowledging (“heartbeating”) job update progress. This may be helpful for mission-critical +service updates where explicit job health monitoring is vital during the entire job update +lifecycle. Such job updates would rely on an external service (or a custom client) periodically +pulsing an active coordinated job update via a +<a href="https://github.com/apache/aurora/blob/rel/0.18.0/api/src/main/thrift/org/apache/aurora/gen/api.thrift";>pulseJobUpdate RPC</a>.</p> + +<p>A coordinated update is defined by setting a positive +<a href="../../reference/configuration/#updateconfig-objects">pulse<em>interval</em>secs</a> value in job configuration +file. If no pulses are received within specified interval the update will be blocked. A blocked +update is unable to continue rolling forward (or rolling back) but retains its active status. +It may only be unblocked by a fresh <code>pulseJobUpdate</code> call.</p> + +<p>NOTE: A coordinated update starts in <code>ROLL_FORWARD_AWAITING_PULSE</code> state and will not make any +progress until the first pulse arrives. However, a paused update (<code>ROLL_FORWARD_PAUSED</code> or +<code>ROLL_BACK_PAUSED</code>) is still considered active and upon resuming will immediately make progress +provided the pulse interval has not expired.</p> + +<h2 id="canary-deployments">Canary Deployments</h2> + +<p>Canary deployments are a pattern for rolling out updates to a subset of job instances, +in order to test different code versions alongside the actual production job. +It is a risk-mitigation strategy for job owners and commonly used in a form where +job instance 0 runs with a different configuration than the instances 1-N.</p> + +<p>For example, consider a job with 4 instances that each +request 1 core of cpu, 1 GB of RAM, and 1 GB of disk space as specified +in the configuration file <code>hello_world.aurora</code>. If you want to +update it so it requests 2 GB of RAM instead of 1. You can create a new +configuration file to do that called <code>new_hello_world.aurora</code> and +issue</p> +<pre class="highlight plaintext"><code>aurora update start <job_key_value>/0-1 new_hello_world.aurora +</code></pre> + +<p>This results in instances 0 and 1 having 1 cpu, 2 GB of RAM, and 1 GB of disk space, +while instances 2 and 3 have 1 cpu, 1 GB of RAM, and 1 GB of disk space. If instance 3 +dies and restarts, it restarts with 1 cpu, 1 GB RAM, and 1 GB disk space.</p> + +<p>So that means there are two simultaneous task configurations for the same job +at the same time, just valid for different ranges of instances. While this isn’t a recommended +pattern, it is valid and supported by the Aurora scheduler.</p> + +</div> + + </div> + </div> + <div class="container-fluid section-footer buffer"> + <div class="container"> + <div class="row"> + <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3> + <ul> + <li><a href="/downloads/">Downloads</a></li> + <li><a href="/community/">Mailing Lists</a></li> + <li><a href="http://issues.apache.org/jira/browse/AURORA";>Issue Tracking</a></li> + <li><a href="/documentation/latest/contributing/">How To Contribute</a></li> + </ul> + </div> + <div class="col-md-2"><h3>The ASF</h3> + <ul> + <li><a href="http://www.apache.org/licenses/";>License</a></li> + <li><a href="http://www.apache.org/foundation/sponsorship.html";>Sponsorship</a></li> + <li><a href="http://www.apache.org/foundation/thanks.html";>Thanks</a></li> + <li><a href="http://www.apache.org/security/";>Security</a></li> + </ul> + </div> + <div class="col-md-6"> + <p class="disclaimer">© 2014-2017 <a href="http://www.apache.org/";>Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/";>Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/";>Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/";>Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p> + </div> + </div> + </div> + + </body> +</html> Added: aurora/site/publish/documentation/0.18.0/features/mesos-fetcher/index.html URL: http://svn.apache.org/viewvc/aurora/site/publish/documentation/0.18.0/features/mesos-fetcher/index.html?rev=1799392&view=auto ============================================================================== --- aurora/site/publish/documentation/0.18.0/features/mesos-fetcher/index.html (added) +++ aurora/site/publish/documentation/0.18.0/features/mesos-fetcher/index.html Wed Jun 21 06:36:21 2017 @@ -0,0 +1,193 @@ +<!DOCTYPE html> +<html lang="en"> + <head> + <meta charset="utf-8"> + <meta name="viewport" content="width=device-width, initial-scale=1"> + <title>Apache Aurora</title> + <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css";> + <link href="/assets/css/main.css" rel="stylesheet"> + <!-- Analytics --> + <script type="text/javascript"> + var _gaq = _gaq || []; + _gaq.push(['_setAccount', 'UA-45879646-1']); + _gaq.push(['_setDomainName', 'apache.org']); + _gaq.push(['_trackPageview']); + + (function() { + var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; + ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; + var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); + })(); + </script> + </head> + <body> + <div class="container-fluid section-header"> + <div class="container"> + <div class="nav nav-bar"> + <a href="/"><img src="/assets/img/aurora_logo_dkbkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a> + <ul class="nav navbar-nav navbar-right"> + <li><a href="/documentation/latest/">Documentation</a></li> + <li><a href="/community/">Community</a></li> + <li><a href="/downloads/">Downloads</a></li> + <li><a href="/blog/">Blog</a></li> + </ul> + </div> + </div> +</div> + + <div class="container-fluid"> + <div class="container content"> + <div class="col-md-12 documentation"> +<h5 class="page-header text-uppercase">Documentation +<select onChange="window.location.href='/documentation/' + this.value + '/features/mesos-fetcher/'" + value="0.18.0"> + <option value="0.18.0" + selected="selected"> + 0.18.0 + (latest) + </option> + <option value="0.17.0" + > + 0.17.0 + </option> + <option value="0.16.0" + > + 0.16.0 + </option> + <option value="0.15.0" + > + 0.15.0 + </option> + <option value="0.14.0" + > + 0.14.0 + </option> + <option value="0.13.0" + > + 0.13.0 + </option> + <option value="0.12.0" + > + 0.12.0 + </option> + <option value="0.11.0" + > + 0.11.0 + </option> + <option value="0.10.0" + > + 0.10.0 + </option> + <option value="0.9.0" + > + 0.9.0 + </option> + <option value="0.8.0" + > + 0.8.0 + </option> + <option value="0.7.0-incubating" + > + 0.7.0-incubating + </option> + <option value="0.6.0-incubating" + > + 0.6.0-incubating + </option> + <option value="0.5.0-incubating" + > + 0.5.0-incubating + </option> +</select> +</h5> +<h1 id="mesos-fetcher">Mesos Fetcher</h1> + +<p>Mesos has support for downloading resources into the sandbox through the +use of the <a href="http://mesos.apache.org/documentation/latest/fetcher/";>Mesos Fetcher</a></p> + +<p>Aurora supports passing URIs to the Mesos Fetcher dynamically by including +a list of URIs in job submissions.</p> + +<h2 id="how-to-use">How to use</h2> + +<p>The scheduler flag <code>-enable_mesos_fetcher</code> must be set to true.</p> + +<p>Currently only the scheduler side of this feature has been implemented +so a modification to the existing client, or a custom Thrift client are required +to make use of this feature.</p> + +<p>If using a custom Thrift client, the list of URIs must be included in TaskConfig +as the <code>mesosFetcherUris</code> field.</p> + +<p>Each Mesos Fetcher URI has the following data members:</p> + +<table><thead> +<tr> +<th>Property</th> +<th>Description</th> +</tr> +</thead><tbody> +<tr> +<td>value (required)</td> +<td>Path to the resource needed in the sandbox.</td> +</tr> +<tr> +<td>extract (optional)</td> +<td>Extract files from packed or compressed archives into the sandbox.</td> +</tr> +<tr> +<td>cache (optional)</td> +<td>Use caching mechanism provided by Mesos for resources.</td> +</tr> +</tbody></table> + +<p>Note that this structure is very similar to the one provided for downloading +resources needed for a <a href="../../operations/configuration/">custom executor</a>.</p> + +<p>This is because both features use the Mesos fetcher to retrieve resources into +the sandbox. However, one, the custom executor feature, has a static set of URIs +set in the server side, and the other, the Mesos Fetcher feature, is a dynamic set +of URIs set at the time of job submission.</p> + +<h2 id="security-implications">Security Implications</h2> + +<p>There are security implications that must be taken into account when enabling this feature. +<strong>Enabling this feature may potentially enable any job submitting user to perform a privilege escalation.</strong></p> + +<p>Until a more through solution is created, one step that has been taken to mitigate this issue +is to statically mark every user submitted URI as non-executable. This is in contrast to the set of URIs +set in the custom executor feature which may mark any URI as executable.</p> + +<p>If the need arises to mark a downloaded URI as executable, please consider using the custom executor feature.</p> + +</div> + + </div> + </div> + <div class="container-fluid section-footer buffer"> + <div class="container"> + <div class="row"> + <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3> + <ul> + <li><a href="/downloads/">Downloads</a></li> + <li><a href="/community/">Mailing Lists</a></li> + <li><a href="http://issues.apache.org/jira/browse/AURORA";>Issue Tracking</a></li> + <li><a href="/documentation/latest/contributing/">How To Contribute</a></li> + </ul> + </div> + <div class="col-md-2"><h3>The ASF</h3> + <ul> + <li><a href="http://www.apache.org/licenses/";>License</a></li> + <li><a href="http://www.apache.org/foundation/sponsorship.html";>Sponsorship</a></li> + <li><a href="http://www.apache.org/foundation/thanks.html";>Thanks</a></li> + <li><a href="http://www.apache.org/security/";>Security</a></li> + </ul> + </div> + <div class="col-md-6"> + <p class="disclaimer">© 2014-2017 <a href="http://www.apache.org/";>Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/";>Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/";>Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/";>Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p> + </div> + </div> + </div> + + </body> +</html> Added: aurora/site/publish/documentation/0.18.0/features/multitenancy/index.html URL: http://svn.apache.org/viewvc/aurora/site/publish/documentation/0.18.0/features/multitenancy/index.html?rev=1799392&view=auto ============================================================================== --- aurora/site/publish/documentation/0.18.0/features/multitenancy/index.html (added) +++ aurora/site/publish/documentation/0.18.0/features/multitenancy/index.html Wed Jun 21 06:36:21 2017 @@ -0,0 +1,214 @@ +<!DOCTYPE html> +<html lang="en"> + <head> + <meta charset="utf-8"> + <meta name="viewport" content="width=device-width, initial-scale=1"> + <title>Apache Aurora</title> + <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css";> + <link href="/assets/css/main.css" rel="stylesheet"> + <!-- Analytics --> + <script type="text/javascript"> + var _gaq = _gaq || []; + _gaq.push(['_setAccount', 'UA-45879646-1']); + _gaq.push(['_setDomainName', 'apache.org']); + _gaq.push(['_trackPageview']); + + (function() { + var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; + ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; + var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); + })(); + </script> + </head> + <body> + <div class="container-fluid section-header"> + <div class="container"> + <div class="nav nav-bar"> + <a href="/"><img src="/assets/img/aurora_logo_dkbkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a> + <ul class="nav navbar-nav navbar-right"> + <li><a href="/documentation/latest/">Documentation</a></li> + <li><a href="/community/">Community</a></li> + <li><a href="/downloads/">Downloads</a></li> + <li><a href="/blog/">Blog</a></li> + </ul> + </div> + </div> +</div> + + <div class="container-fluid"> + <div class="container content"> + <div class="col-md-12 documentation"> +<h5 class="page-header text-uppercase">Documentation +<select onChange="window.location.href='/documentation/' + this.value + '/features/multitenancy/'" + value="0.18.0"> + <option value="0.18.0" + selected="selected"> + 0.18.0 + (latest) + </option> + <option value="0.17.0" + > + 0.17.0 + </option> + <option value="0.16.0" + > + 0.16.0 + </option> + <option value="0.15.0" + > + 0.15.0 + </option> + <option value="0.14.0" + > + 0.14.0 + </option> + <option value="0.13.0" + > + 0.13.0 + </option> + <option value="0.12.0" + > + 0.12.0 + </option> + <option value="0.11.0" + > + 0.11.0 + </option> + <option value="0.10.0" + > + 0.10.0 + </option> + <option value="0.9.0" + > + 0.9.0 + </option> + <option value="0.8.0" + > + 0.8.0 + </option> + <option value="0.7.0-incubating" + > + 0.7.0-incubating + </option> + <option value="0.6.0-incubating" + > + 0.6.0-incubating + </option> + <option value="0.5.0-incubating" + > + 0.5.0-incubating + </option> +</select> +</h5> +<h1 id="multitenancy">Multitenancy</h1> + +<p>Aurora is a multi-tenant system that can run jobs of multiple clients/tenants. +Going beyond the <a href="../resource-isolation/">resource isolation on an individual host</a>, it is +crucial to prevent those jobs from stepping on each others toes.</p> + +<h2 id="job-namespaces">Job Namespaces</h2> + +<p>The namespace for jobs in Aurora follows a hierarchical structure. This is meant to make it easier +to differentiate between different jobs. A job key consists of four parts. The four parts are +<code><cluster>/<role>/<environment>/<jobname></code> in that order:</p> + +<ul> +<li>Cluster refers to the name of a particular Aurora installation.</li> +<li>Role names are user accounts.</li> +<li>Environment names are namespaces.</li> +<li>Jobname is the custom name of your job.</li> +</ul> + +<p>Role names correspond to user accounts. They are used for +<a href="../../operations/security/">authentication</a>, as the linux user used to run jobs, and for the +assignment of <a href="#preemption">quota</a>. If you don’t know what accounts are available, contact your +sysadmin.</p> + +<p>The environment component in the job key, serves as a namespace. The values for +environment are validated in the client and the scheduler so as to allow any of <code>devel</code>, <code>test</code>, +<code>production</code>, and any value matching the regular expression <code>staging[0-9]*</code>.</p> + +<p>None of the values imply any difference in the scheduling behavior. Conventionally, the +“environment” is set so as to indicate a certain level of stability in the behavior of the job +by ensuring that an appropriate level of testing has been performed on the application code. e.g. +in the case of a typical Job, releases may progress through the following phases in order of +increasing level of stability: <code>devel</code>, <code>test</code>, <code>staging</code>, <code>production</code>.</p> + +<h2 id="configuration-tiers">Configuration Tiers</h2> + +<p>Tier is a predefined bundle of task configuration options. Aurora schedules tasks and assigns them +resources based on their tier assignment. The default scheduler tier configuration allows for +3 tiers:</p> + +<ul> +<li><code>revocable</code>: The <code>revocable</code> tier requires the task to run with <a href="../resource-isolation/#oversubscription">revocable</a> +resources.</li> +<li><code>preemptible</code>: Setting the taskâs tier to <code>preemptible</code> allows for the possibility of that task +being <a href="#preemption">preempted</a> by other tasks when cluster is running low on resources.</li> +<li><code>preferred</code>: The <code>preferred</code> tier prevents the task from using <a href="../resource-isolation/#oversubscription">revocable</a> +resources and from being <a href="#preemption">preempted</a>.</li> +</ul> + +<p>Since it is possible that a cluster is configured with a custom tier configuration, users should +consult their cluster administrator to be informed of the tiers supported by the cluster. Attempts +to schedule jobs with an unsupported tier will be rejected by the scheduler.</p> + +<h2 id="preemption">Preemption</h2> + +<p>In order to guarantee that important production jobs are always running, Aurora supports +preemption.</p> + +<p>Let’s consider we have a pending job that is candidate for scheduling but resource shortage pressure +prevents this. Active tasks can become the victim of preemption, if:</p> + +<ul> +<li>both candidate and victim are owned by the same role and the +<a href="../../reference/configuration/#job-objects">priority</a> of a victim is lower than the +<a href="../../reference/configuration/#job-objects">priority</a> of the candidate.</li> +<li>OR a victim is a <code>preemptible</code> or <code>revocable</code> <a href="#configuration-tiers">tier</a> task and the candidate +is a <code>preferred</code> <a href="#configuration-tiers">tier</a> task.</li> +</ul> + +<p>In other words, tasks from <code>preferred</code> <a href="../../reference/configuration/#job-objects">tier</a> jobs may +preempt tasks from any <code>preemptible</code> or <code>revocable</code> job. However, a <code>preferred</code> task may only be +preempted by tasks from <code>preferred</code> jobs in the same role with higher <a href="../../reference/configuration/#job-objects">priority</a>.</p> + +<p>Aurora requires resource quotas for <a href="../../reference/configuration/#job-objects">production non-dedicated jobs</a>. +Quota is enforced at the job role level and when set, defines a non-preemptible pool of compute resources within +that role. All job types (service, adhoc or cron) require role resource quota unless a job has +<a href="../constraints/#dedicated-attribute">dedicated constraint set</a>.</p> + +<p>To grant quota to a particular role in production, an operator can use the command +<code>aurora_admin set_quota</code>.</p> + +</div> + + </div> + </div> + <div class="container-fluid section-footer buffer"> + <div class="container"> + <div class="row"> + <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3> + <ul> + <li><a href="/downloads/">Downloads</a></li> + <li><a href="/community/">Mailing Lists</a></li> + <li><a href="http://issues.apache.org/jira/browse/AURORA";>Issue Tracking</a></li> + <li><a href="/documentation/latest/contributing/">How To Contribute</a></li> + </ul> + </div> + <div class="col-md-2"><h3>The ASF</h3> + <ul> + <li><a href="http://www.apache.org/licenses/";>License</a></li> + <li><a href="http://www.apache.org/foundation/sponsorship.html";>Sponsorship</a></li> + <li><a href="http://www.apache.org/foundation/thanks.html";>Thanks</a></li> + <li><a href="http://www.apache.org/security/";>Security</a></li> + </ul> + </div> + <div class="col-md-6"> + <p class="disclaimer">© 2014-2017 <a href="http://www.apache.org/";>Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/";>Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/";>Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/";>Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p> + </div> + </div> + </div> + + </body> +</html> Added: aurora/site/publish/documentation/0.18.0/features/resource-isolation/index.html URL: http://svn.apache.org/viewvc/aurora/site/publish/documentation/0.18.0/features/resource-isolation/index.html?rev=1799392&view=auto ============================================================================== --- aurora/site/publish/documentation/0.18.0/features/resource-isolation/index.html (added) +++ aurora/site/publish/documentation/0.18.0/features/resource-isolation/index.html Wed Jun 21 06:36:21 2017 @@ -0,0 +1,312 @@ +<!DOCTYPE html> +<html lang="en"> + <head> + <meta charset="utf-8"> + <meta name="viewport" content="width=device-width, initial-scale=1"> + <title>Apache Aurora</title> + <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css";> + <link href="/assets/css/main.css" rel="stylesheet"> + <!-- Analytics --> + <script type="text/javascript"> + var _gaq = _gaq || []; + _gaq.push(['_setAccount', 'UA-45879646-1']); + _gaq.push(['_setDomainName', 'apache.org']); + _gaq.push(['_trackPageview']); + + (function() { + var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; + ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; + var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); + })(); + </script> + </head> + <body> + <div class="container-fluid section-header"> + <div class="container"> + <div class="nav nav-bar"> + <a href="/"><img src="/assets/img/aurora_logo_dkbkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a> + <ul class="nav navbar-nav navbar-right"> + <li><a href="/documentation/latest/">Documentation</a></li> + <li><a href="/community/">Community</a></li> + <li><a href="/downloads/">Downloads</a></li> + <li><a href="/blog/">Blog</a></li> + </ul> + </div> + </div> +</div> + + <div class="container-fluid"> + <div class="container content"> + <div class="col-md-12 documentation"> +<h5 class="page-header text-uppercase">Documentation +<select onChange="window.location.href='/documentation/' + this.value + '/features/resource-isolation/'" + value="0.18.0"> + <option value="0.18.0" + selected="selected"> + 0.18.0 + (latest) + </option> + <option value="0.17.0" + > + 0.17.0 + </option> + <option value="0.16.0" + > + 0.16.0 + </option> + <option value="0.15.0" + > + 0.15.0 + </option> + <option value="0.14.0" + > + 0.14.0 + </option> + <option value="0.13.0" + > + 0.13.0 + </option> + <option value="0.12.0" + > + 0.12.0 + </option> + <option value="0.11.0" + > + 0.11.0 + </option> + <option value="0.10.0" + > + 0.10.0 + </option> + <option value="0.9.0" + > + 0.9.0 + </option> + <option value="0.8.0" + > + 0.8.0 + </option> + <option value="0.7.0-incubating" + > + 0.7.0-incubating + </option> + <option value="0.6.0-incubating" + > + 0.6.0-incubating + </option> + <option value="0.5.0-incubating" + > + 0.5.0-incubating + </option> +</select> +</h5> +<h1 id="resources-isolation-and-sizing">Resources Isolation and Sizing</h1> + +<p>This document assumes Aurora and Mesos have been configured +using our <a href="../../operations/configuration/#resource-isolation">recommended resource isolation settings</a>.</p> + +<ul> +<li><a href="#isolation">Isolation</a></li> +<li><a href="#sizing">Sizing</a></li> +<li><a href="#oversubscription">Oversubscription</a></li> +</ul> + +<h2 id="isolation">Isolation</h2> + +<p>Aurora is a multi-tenant system; a single software instance runs on a +server, serving multiple clients/tenants. To share resources among +tenants, it leverages Mesos for isolation of:</p> + +<ul> +<li>CPU</li> +<li>GPU</li> +<li>memory</li> +<li>disk space</li> +<li>ports</li> +</ul> + +<p>CPU is a soft limit, and handled differently from memory and disk space. +Too low a CPU value results in throttling your application and +slowing it down. Memory and disk space are both hard limits; when your +application goes over these values, it’s killed.</p> + +<h3 id="cpu-isolation">CPU Isolation</h3> + +<p>Mesos can be configured to use a quota based CPU scheduler (the <em>Completely</em> +<em>Fair Scheduler</em>) to provide consistent and predictable performance. +This is effectively a guarantee of resources – you receive at least what +you requested, but also no more than you’ve requested.</p> + +<p>The scheduler gives applications a CPU quota for every 100 ms interval. +When an application uses its quota for an interval, it is throttled for +the rest of the 100 ms. Usage resets for each interval and unused +quota does not carry over.</p> + +<p>For example, an application specifying 4.0 CPU has access to 400 ms of +CPU time every 100 ms. This CPU quota can be used in different ways, +depending on the application and available resources. Consider the +scenarios shown in this diagram.</p> + +<p><img alt="CPU Availability" src="../../images/CPUavailability.png" /></p> + +<ul> +<li><p><em>Scenario A</em>: the application can use up to 4 cores continuously for +every 100 ms interval. It is never throttled and starts processing +new requests immediately.</p></li> +<li><p><em>Scenario B</em> : the application uses up to 8 cores (depending on +availability) but is throttled after 50 ms. The CPU quota resets at the +start of each new 100 ms interval.</p></li> +<li><p><em>Scenario C</em> : is like Scenario A, but there is a garbage collection +event in the second interval that consumes all CPU quota. The +application throttles for the remaining 75 ms of that interval and +cannot service requests until the next interval. In this example, the +garbage collection finished in one interval but, depending on how much +garbage needs collecting, it may take more than one interval and further +delay service of requests.</p></li> +</ul> + +<p><em>Technical Note</em>: Mesos considers logical cores, also known as +hyperthreading or SMT cores, as the unit of CPU.</p> + +<h3 id="memory-isolation">Memory Isolation</h3> + +<p>Mesos uses dedicated memory allocation. Your application always has +access to the amount of memory specified in your configuration. The +application’s memory use is defined as the sum of the resident set size +(RSS) of all processes in a shard. Each shard is considered +independently.</p> + +<p>In other words, say you specified a memory size of 10GB. Each shard +would receive 10GB of memory. If an individual shard’s memory demands +exceed 10GB, that shard is killed, but the other shards continue +working.</p> + +<p><em>Technical note</em>: Total memory size is not enforced at allocation time, +so your application can request more than its allocation without getting +an ENOMEM. However, it will be killed shortly after.</p> + +<h3 id="disk-space">Disk Space</h3> + +<p>Disk space used by your application is defined as the sum of the files’ +disk space in your application’s directory, including the <code>stdout</code> and +<code>stderr</code> logged from your application. Each shard is considered +independently. You should use off-node storage for your application’s +data whenever possible.</p> + +<p>In other words, say you specified disk space size of 100MB. Each shard +would receive 100MB of disk space. If an individual shard’s disk space +demands exceed 100MB, that shard is killed, but the other shards +continue working.</p> + +<p>After your application finishes running, its allocated disk space is +reclaimed. Thus, your job’s final action should move any disk content +that you want to keep, such as logs, to your home file system or other +less transitory storage. Disk reclamation takes place an undefined +period after the application finish time; until then, the disk contents +are still available but you shouldn’t count on them being so.</p> + +<p><em>Technical note</em> : Disk space is not enforced at write so your +application can write above its quota without getting an ENOSPC, but it +will be killed shortly after. This is subject to change.</p> + +<h3 id="gpu-isolation">GPU Isolation</h3> + +<p>GPU isolation will be supported for Nvidia devices starting from Mesos 1.0. +Access to the allocated units will be exclusive with no sharing between tasks +allowed (e.g. no fractional GPU allocation). For more details, see the +<a href="https://docs.google.com/document/d/10GJ1A80x4nIEo8kfdeo9B11PIbS1xJrrB4Z373Ifkpo/edit#heading=h.w84lz7p4eexl";>Mesos design document</a> +and the <a href="http://mesos.apache.org/documentation/latest/configuration/";>Mesos agent configuration</a>.</p> + +<h3 id="other-resources">Other Resources</h3> + +<p>Other resources, such as network bandwidth, do not have any performance +guarantees. For some resources, such as memory bandwidth, there are no +practical sharing methods so some application combinations collocated on +the same host may cause contention.</p> + +<h2 id="sizing">Sizing</h2> + +<h3 id="cpu-sizing">CPU Sizing</h3> + +<p>To correctly size Aurora-run Mesos tasks, specify a per-shard CPU value +that lets the task run at its desired performance when at peak load +distributed across all shards. Include reserve capacity of at least 50%, +possibly more, depending on how critical your service is (or how +confident you are about your original estimate : -)), ideally by +increasing the number of shards to also improve resiliency. When running +your application, observe its CPU stats over time. If consistently at or +near your quota during peak load, you should consider increasing either +per-shard CPU or the number of shards.</p> + +<h2 id="memory-sizing">Memory Sizing</h2> + +<p>Size for your application’s peak requirement. Observe the per-instance +memory statistics over time, as memory requirements can vary over +different periods. Remember that if your application exceeds its memory +value, it will be killed, so you should also add a safety margin of +around 10-20%. If you have the ability to do so, you may also want to +put alerts on the per-instance memory.</p> + +<h2 id="disk-space-sizing">Disk Space Sizing</h2> + +<p>Size for your application’s peak requirement. Rotate and discard log +files as needed to stay within your quota. When running a Java process, +add the maximum size of the Java heap to your disk space requirement, in +order to account for an out of memory error dumping the heap +into the application’s sandbox space.</p> + +<h2 id="gpu-sizing">GPU Sizing</h2> + +<p>GPU is highly dependent on your application requirements and is only limited +by the number of physical GPU units available on a target box.</p> + +<h2 id="oversubscription">Oversubscription</h2> + +<p>Mesos supports <a href="http://mesos.apache.org/documentation/latest/oversubscription/";>oversubscription of machine resources</a> +via the concept of revocable tasks. In contrast to non-revocable tasks, revocable tasks are best-effort. +Mesos reserves the right to throttle or even kill them if they might affect existing high-priority +user-facing services.</p> + +<p>As of today, the only revocable resource supported by Aurora are CPU and RAM resources. A job can +opt-in to use those by specifying the <code>revocable</code> <a href="../../features/multitenancy/#configuration-tiers">Configuration Tier</a>. +A revocable job will only be scheduled using revocable resources, even if there are plenty of +non-revocable resources available.</p> + +<p>The Aurora scheduler must be <a href="../../operations/configuration/#resource-isolation">configured to receive revocable offers</a> +from Mesos and accept revocable jobs. If not configured properly revocable tasks will never get +assigned to hosts and will stay in <code>PENDING</code>.</p> + +<p>For details on how to mark a job as being revocable, see the +<a href="../../reference/configuration/">Configuration Reference</a>.</p> + +</div> + + </div> + </div> + <div class="container-fluid section-footer buffer"> + <div class="container"> + <div class="row"> + <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3> + <ul> + <li><a href="/downloads/">Downloads</a></li> + <li><a href="/community/">Mailing Lists</a></li> + <li><a href="http://issues.apache.org/jira/browse/AURORA";>Issue Tracking</a></li> + <li><a href="/documentation/latest/contributing/">How To Contribute</a></li> + </ul> + </div> + <div class="col-md-2"><h3>The ASF</h3> + <ul> + <li><a href="http://www.apache.org/licenses/";>License</a></li> + <li><a href="http://www.apache.org/foundation/sponsorship.html";>Sponsorship</a></li> + <li><a href="http://www.apache.org/foundation/thanks.html";>Thanks</a></li> + <li><a href="http://www.apache.org/security/";>Security</a></li> + </ul> + </div> + <div class="col-md-6"> + <p class="disclaimer">© 2014-2017 <a href="http://www.apache.org/";>Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/";>Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/";>Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/";>Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p> + </div> + </div> + </div> + + </body> +</html> Added: aurora/site/publish/documentation/0.18.0/features/service-discovery/index.html URL: http://svn.apache.org/viewvc/aurora/site/publish/documentation/0.18.0/features/service-discovery/index.html?rev=1799392&view=auto ============================================================================== --- aurora/site/publish/documentation/0.18.0/features/service-discovery/index.html (added) +++ aurora/site/publish/documentation/0.18.0/features/service-discovery/index.html Wed Jun 21 06:36:21 2017 @@ -0,0 +1,182 @@ +<!DOCTYPE html> +<html lang="en"> + <head> + <meta charset="utf-8"> + <meta name="viewport" content="width=device-width, initial-scale=1"> + <title>Apache Aurora</title> + <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css";> + <link href="/assets/css/main.css" rel="stylesheet"> + <!-- Analytics --> + <script type="text/javascript"> + var _gaq = _gaq || []; + _gaq.push(['_setAccount', 'UA-45879646-1']); + _gaq.push(['_setDomainName', 'apache.org']); + _gaq.push(['_trackPageview']); + + (function() { + var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; + ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; + var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); + })(); + </script> + </head> + <body> + <div class="container-fluid section-header"> + <div class="container"> + <div class="nav nav-bar"> + <a href="/"><img src="/assets/img/aurora_logo_dkbkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a> + <ul class="nav navbar-nav navbar-right"> + <li><a href="/documentation/latest/">Documentation</a></li> + <li><a href="/community/">Community</a></li> + <li><a href="/downloads/">Downloads</a></li> + <li><a href="/blog/">Blog</a></li> + </ul> + </div> + </div> +</div> + + <div class="container-fluid"> + <div class="container content"> + <div class="col-md-12 documentation"> +<h5 class="page-header text-uppercase">Documentation +<select onChange="window.location.href='/documentation/' + this.value + '/features/service-discovery/'" + value="0.18.0"> + <option value="0.18.0" + selected="selected"> + 0.18.0 + (latest) + </option> + <option value="0.17.0" + > + 0.17.0 + </option> + <option value="0.16.0" + > + 0.16.0 + </option> + <option value="0.15.0" + > + 0.15.0 + </option> + <option value="0.14.0" + > + 0.14.0 + </option> + <option value="0.13.0" + > + 0.13.0 + </option> + <option value="0.12.0" + > + 0.12.0 + </option> + <option value="0.11.0" + > + 0.11.0 + </option> + <option value="0.10.0" + > + 0.10.0 + </option> + <option value="0.9.0" + > + 0.9.0 + </option> + <option value="0.8.0" + > + 0.8.0 + </option> + <option value="0.7.0-incubating" + > + 0.7.0-incubating + </option> + <option value="0.6.0-incubating" + > + 0.6.0-incubating + </option> + <option value="0.5.0-incubating" + > + 0.5.0-incubating + </option> +</select> +</h5> +<h1 id="service-discovery">Service Discovery</h1> + +<p>It is possible for the Aurora executor to announce tasks into ServerSets for +the purpose of service discovery. ServerSets use the Zookeeper <a href="http://zookeeper.apache.org/doc/trunk/recipes.html#sc_outOfTheBox";>group membership pattern</a> +of which there are several reference implementations:</p> + +<ul> +<li><a href="https://github.com/apache/mesos/blob/master/src/zookeeper/group.cpp";>C++</a></li> +<li><a href="https://github.com/twitter/commons/blob/master/src/java/com/twitter/common/zookeeper/ServerSetImpl.java#L221";>Java</a></li> +<li><a href="https://github.com/twitter/commons/blob/master/src/python/twitter/common/zookeeper/serverset/serverset.py#L51";>Python</a></li> +</ul> + +<p>These can also be used natively in Finagle using the <a href="https://github.com/twitter/finagle/blob/master/finagle-serversets/src/main/scala/com/twitter/finagle/zookeeper/ZookeeperServerSetCluster.scala";>ZookeeperServerSetCluster</a>.</p> + +<p>For more information about how to configure announcing, see the <a href="../../reference/configuration/">Configuration Reference</a>.</p> + +<h2 id="using-mesos-discoveryinfo">Using Mesos DiscoveryInfo</h2> + +<p>Experimental support for populating DiscoveryInfo in Mesos is introduced in Aurora. This can be used to build +custom service discovery system not using zookeeper. Please see <code>Service Discovery</code> section in +<a href="http://mesos.apache.org/documentation/latest/app-framework-development-guide/";>Mesos Framework Development guide</a> for +explanation of the protobuf message in Mesos.</p> + +<p>To use this feature, please enable <code>--populate_discovery_info</code> flag on scheduler. All jobs started by scheduler +afterwards will have their portmap populated to Mesos and discoverable in <code>/state</code> endpoint in Mesos master and agent.</p> + +<h3 id="using-mesos-dns">Using Mesos DNS</h3> + +<p>An example is using <a href="https://github.com/mesosphere/mesos-dns";>Mesos-DNS</a>, which is able to generate multiple DNS +records. With current implementation, the example job with key <code>devcluster/vagrant/test/http-example</code> generates at +least the following:</p> + +<ol> +<li>An A record for <code>http_example.test.vagrant.aurora.mesos</code> (which only includes IP address);</li> +<li>A <a href="https://en.wikipedia.org/wiki/SRV_record";>SRV record</a> for +<code>_http_example.test.vagrant._tcp.aurora.mesos</code>, which includes IP address and every port. This should only +be used if the service has one port.</li> +<li>A SRV record <code>_{port-name}._http_example.test.vagrant._tcp.aurora.mesos</code> for each port name +defined. This should be used when the service has multiple ports.</li> +</ol> + +<p>Things to note:</p> + +<ol> +<li>The domain part (“.mesos” in above example) can be configured in <a href="http://mesosphere.github.io/mesos-dns/docs/configuration-parameters.html";>Mesos DNS</a>;</li> +<li>Right now, portmap and port aliases in announcer object are not reflected in DiscoveryInfo, therefore not visible in +Mesos DNS records either. This is because they are only resolved in thermos executors.</li> +</ol> + +</div> + + </div> + </div> + <div class="container-fluid section-footer buffer"> + <div class="container"> + <div class="row"> + <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3> + <ul> + <li><a href="/downloads/">Downloads</a></li> + <li><a href="/community/">Mailing Lists</a></li> + <li><a href="http://issues.apache.org/jira/browse/AURORA";>Issue Tracking</a></li> + <li><a href="/documentation/latest/contributing/">How To Contribute</a></li> + </ul> + </div> + <div class="col-md-2"><h3>The ASF</h3> + <ul> + <li><a href="http://www.apache.org/licenses/";>License</a></li> + <li><a href="http://www.apache.org/foundation/sponsorship.html";>Sponsorship</a></li> + <li><a href="http://www.apache.org/foundation/thanks.html";>Thanks</a></li> + <li><a href="http://www.apache.org/security/";>Security</a></li> + </ul> + </div> + <div class="col-md-6"> + <p class="disclaimer">© 2014-2017 <a href="http://www.apache.org/";>Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/";>Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/";>Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/";>Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p> + </div> + </div> + </div> + + </body> +</html> Added: aurora/site/publish/documentation/0.18.0/features/services/index.html URL: http://svn.apache.org/viewvc/aurora/site/publish/documentation/0.18.0/features/services/index.html?rev=1799392&view=auto ============================================================================== --- aurora/site/publish/documentation/0.18.0/features/services/index.html (added) +++ aurora/site/publish/documentation/0.18.0/features/services/index.html Wed Jun 21 06:36:21 2017 @@ -0,0 +1,240 @@ +<!DOCTYPE html> +<html lang="en"> + <head> + <meta charset="utf-8"> + <meta name="viewport" content="width=device-width, initial-scale=1"> + <title>Apache Aurora</title> + <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css";> + <link href="/assets/css/main.css" rel="stylesheet"> + <!-- Analytics --> + <script type="text/javascript"> + var _gaq = _gaq || []; + _gaq.push(['_setAccount', 'UA-45879646-1']); + _gaq.push(['_setDomainName', 'apache.org']); + _gaq.push(['_trackPageview']); + + (function() { + var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; + ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; + var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); + })(); + </script> + </head> + <body> + <div class="container-fluid section-header"> + <div class="container"> + <div class="nav nav-bar"> + <a href="/"><img src="/assets/img/aurora_logo_dkbkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a> + <ul class="nav navbar-nav navbar-right"> + <li><a href="/documentation/latest/">Documentation</a></li> + <li><a href="/community/">Community</a></li> + <li><a href="/downloads/">Downloads</a></li> + <li><a href="/blog/">Blog</a></li> + </ul> + </div> + </div> +</div> + + <div class="container-fluid"> + <div class="container content"> + <div class="col-md-12 documentation"> +<h5 class="page-header text-uppercase">Documentation +<select onChange="window.location.href='/documentation/' + this.value + '/features/services/'" + value="0.18.0"> + <option value="0.18.0" + selected="selected"> + 0.18.0 + (latest) + </option> + <option value="0.17.0" + > + 0.17.0 + </option> + <option value="0.16.0" + > + 0.16.0 + </option> + <option value="0.15.0" + > + 0.15.0 + </option> + <option value="0.14.0" + > + 0.14.0 + </option> + <option value="0.13.0" + > + 0.13.0 + </option> + <option value="0.12.0" + > + 0.12.0 + </option> + <option value="0.11.0" + > + 0.11.0 + </option> + <option value="0.10.0" + > + 0.10.0 + </option> + <option value="0.9.0" + > + 0.9.0 + </option> + <option value="0.8.0" + > + 0.8.0 + </option> + <option value="0.7.0-incubating" + > + 0.7.0-incubating + </option> + <option value="0.6.0-incubating" + > + 0.6.0-incubating + </option> + <option value="0.5.0-incubating" + > + 0.5.0-incubating + </option> +</select> +</h5> +<h1 id="long-running-services">Long-running Services</h1> + +<p>Jobs that are always restart on completion, whether successful or unsuccessful, +are called services. This is useful for long-running processes +such as webservices that should always be running, unless stopped explicitly.</p> + +<h2 id="service-specification">Service Specification</h2> + +<p>A job is identified as a service by the presence of the flag +`<code>service=True</code> in the <a href="../../reference/configuration/#job-objects"><code>Job</code></a> object. +The <code>Service</code> alias can be used as shorthand for <code>Job</code> with <code>service=True</code>.</p> + +<p>Example (available in the <a href="../../getting-started/vagrant/">Vagrant environment</a>):</p> +<pre class="highlight plaintext"><code>$ cat /vagrant/examples/jobs/hello_world.aurora +hello = Process( + name = 'hello', + cmdline = """ + while true; do + echo hello world + sleep 10 + done + """) + +task = SequentialTask( + processes = [hello], + resources = Resources(cpu = 1.0, ram = 128*MB, disk = 128*MB) +) + +jobs = [ + Service( + task = task, + cluster = 'devcluster', + role = 'www-data', + environment = 'prod', + name = 'hello' + ) +] +</code></pre> + +<p>Jobs without the service bit set only restart up to <code>max_task_failures</code> times and only if they +terminated unsuccessfully either due to human error or machine failure (see the +<a href="../../reference/configuration/#job-objects"><code>Job</code></a> object for details).</p> + +<h2 id="ports">Ports</h2> + +<p>In order to be useful, most services have to bind to one or more ports. Aurora enables this +usecase via the <a href="../../reference/configuration/#thermos-namespace"><code>thermos.ports</code> namespace</a> that +allows to request arbitrarily named ports:</p> +<pre class="highlight plaintext"><code>nginx = Process( + name = 'nginx', + cmdline = './run_nginx.sh -port {{thermos.ports[http]}}' +) +</code></pre> + +<p>When this process is included in a job, the job will be allocated a port, and the command line +will be replaced with something like:</p> +<pre class="highlight plaintext"><code>./run_nginx.sh -port 42816 +</code></pre> + +<p>Where 42816 happens to be the allocated port.</p> + +<p>For details on how to enable clients to discover this dynamically assigned port, see our +<a href="../service-discovery/">Service Discovery</a> documentation.</p> + +<h2 id="health-checking">Health Checking</h2> + +<p>Typically, the Thermos executor monitors processes within a task only by liveness of the forked +process. In addition to that, Aurora has support for rudimentary health checking: Either via HTTP +via custom shell scripts.</p> + +<p>For example, simply by requesting a <code>health</code> port, a process can request to be health checked +via repeated calls to the <code>/health</code> endpoint:</p> +<pre class="highlight plaintext"><code>nginx = Process( + name = 'nginx', + cmdline = './run_nginx.sh -port {{thermos.ports[health]}}' +) +</code></pre> + +<p>Please see the +<a href="../../reference/configuration/#healthcheckconfig-objects">configuration reference</a> +for configuration options for this feature.</p> + +<p>Starting with the 0.17.0 release, job updates rely only on task health-checks by introducing +a <code>min_consecutive_successes</code> parameter on the HealthCheckConfig object. This parameter represents +the number of successful health checks needed before a task is moved into the <code>RUNNING</code> state. Tasks +that do not have enough successful health checks within the first <code>n</code> attempts, are moved to the +<code>FAILED</code> state, where <code>n = ceil(initial_interval_secs/interval_secs) + max_consecutive_failures + +min_consecutive_successes</code>. In order to accommodate variability during task warm up, <code>initial_interval_secs</code> +will act as a grace period. Any health-check failures during the first <code>m</code> attempts are ignored and +do not count towards <code>max_consecutive_failures</code>, where <code>m = ceil(initial_interval_secs/interval_secs)</code>.</p> + +<p>As <a href="../job-updates/">job updates</a> are based only on health-checks, it is not necessary to set +<code>watch_secs</code> to the worst-case update time, it can instead be set to 0. The scheduler considers a +task that is in the <code>RUNNING</code> to be healthy and proceeds to updating the next batch of instances. +For details on how to control health checks, please see the +<a href="../../reference/configuration/#healthcheckconfig-objects">HealthCheckConfig</a> configuration object. +Existing jobs that do not configure a health-check can fall-back to using <code>watch_secs</code> to +monitor a task before considering it healthy.</p> + +<p>You can pause health checking by touching a file inside of your sandbox, named <code>.healthchecksnooze</code>. +As long as that file is present, health checks will be disabled, enabling users to gather core +dumps or other performance measurements without worrying about Aurora’s health check killing +their process.</p> + +<p>WARNING: Remember to remove this when you are done, otherwise your instance will have permanently +disabled health checks.</p> + +</div> + + </div> + </div> + <div class="container-fluid section-footer buffer"> + <div class="container"> + <div class="row"> + <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3> + <ul> + <li><a href="/downloads/">Downloads</a></li> + <li><a href="/community/">Mailing Lists</a></li> + <li><a href="http://issues.apache.org/jira/browse/AURORA";>Issue Tracking</a></li> + <li><a href="/documentation/latest/contributing/">How To Contribute</a></li> + </ul> + </div> + <div class="col-md-2"><h3>The ASF</h3> + <ul> + <li><a href="http://www.apache.org/licenses/";>License</a></li> + <li><a href="http://www.apache.org/foundation/sponsorship.html";>Sponsorship</a></li> + <li><a href="http://www.apache.org/foundation/thanks.html";>Thanks</a></li> + <li><a href="http://www.apache.org/security/";>Security</a></li> + </ul> + </div> + <div class="col-md-6"> + <p class="disclaimer">© 2014-2017 <a href="http://www.apache.org/";>Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/";>Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/";>Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/";>Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p> + </div> + </div> + </div> + + </body> +</html>
