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From san...@apache.org
Subject svn commit: r1799392 [5/14] - in /aurora/site: publish/blog/aurora-0-18-0-released/ publish/documentation/0.18.0/ publish/documentation/0.18.0/additional-resources/ publish/documentation/0.18.0/additional-resources/presentations/ publish/documentation/...
Date Wed, 21 Jun 2017 06:36:25 GMT
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+++ aurora/site/publish/documentation/0.18.0/index.html Wed Jun 21 06:36:21 2017
@@ -0,0 +1,237 @@
+<!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 + '/'"
+        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>
+<h2 id="introduction">Introduction</h2>
+
+<p>Apache Aurora is a service scheduler that runs on top of Apache Mesos, enabling you to run
+long-running services, cron jobs, and ad-hoc jobs that take advantage of Apache Mesos&rsquo; scalability,
+fault-tolerance, and resource isolation.</p>
+
+<p>We encourage you to ask questions on the <a href="http://aurora.apache.org/community/">Aurora user list</a> or
+the <code>#aurora</code> IRC channel on <code>irc.freenode.net</code>.</p>
+
+<h2 id="getting-started">Getting Started</h2>
+
+<p>Information for everyone new to Apache Aurora.</p>
+
+<ul>
+<li><a href="getting-started/overview/">Aurora System Overview</a></li>
+<li><a href="getting-started/tutorial/">Hello World Tutorial</a></li>
+<li><a href="getting-started/vagrant/">Local cluster with Vagrant</a></li>
+</ul>
+
+<h2 id="features">Features</h2>
+
+<p>Description of important Aurora features.</p>
+
+<ul>
+<li><a href="features/containers/">Containers</a></li>
+<li><a href="features/cron-jobs/">Cron Jobs</a></li>
+<li><a href="features/custom-executors/">Custom Executors</a></li>
+<li><a href="features/job-updates/">Job Updates</a></li>
+<li><a href="features/multitenancy/">Multitenancy</a></li>
+<li><a href="features/resource-isolation/">Resource Isolation</a></li>
+<li><a href="features/constraints/">Scheduling Constraints</a></li>
+<li><a href="features/services/">Services</a></li>
+<li><a href="features/service-discovery/">Service Discovery</a></li>
+<li><a href="features/sla-metrics/">SLA Metrics</a></li>
+<li><a href="features/webhooks/">Webhooks</a></li>
+</ul>
+
+<h2 id="operators">Operators</h2>
+
+<p>For those that wish to manage and fine-tune an Aurora cluster.</p>
+
+<ul>
+<li><a href="operations/installation/">Installation</a></li>
+<li><a href="operations/configuration/">Configuration</a></li>
+<li><a href="operations/upgrades/">Upgrades</a></li>
+<li><a href="operations/troubleshooting/">Troubleshooting</a></li>
+<li><a href="operations/monitoring/">Monitoring</a></li>
+<li><a href="operations/security/">Security</a></li>
+<li><a href="operations/storage/">Storage</a></li>
+<li><a href="operations/backup-restore/">Backup</a></li>
+</ul>
+
+<h2 id="reference">Reference</h2>
+
+<p>The complete reference of commands, configuration options, and scheduler internals.</p>
+
+<ul>
+<li><a href="reference/task-lifecycle/">Task lifecycle</a></li>
+<li>Configuration (<code>.aurora</code> files)
+
+<ul>
+<li><a href="reference/configuration/">Configuration Reference</a></li>
+<li><a href="reference/configuration-tutorial/">Configuration Tutorial</a></li>
+<li><a href="reference/configuration-best-practices/">Configuration Best Practices</a></li>
+<li><a href="reference/configuration-templating/">Configuration Templating</a></li>
+</ul></li>
+<li>Aurora Client
+
+<ul>
+<li><a href="reference/client-commands/">Client Commands</a></li>
+<li><a href="reference/client-hooks/">Client Hooks</a></li>
+<li><a href="reference/client-cluster-configuration/">Client Cluster Configuration</a></li>
+</ul></li>
+<li><a href="reference/scheduler-configuration/">Scheduler Configuration</a></li>
+<li><a href="reference/observer-configuration/">Observer Configuration</a></li>
+<li><a href="reference/scheduler-endpoints/">Endpoints</a></li>
+</ul>
+
+<h2 id="additional-resources">Additional Resources</h2>
+
+<ul>
+<li><a href="additional-resources/tools/">Tools integrating with Aurora</a></li>
+<li><a href="additional-resources/presentations/">Presentation videos and slides</a></li>
+</ul>
+
+<h2 id="developers">Developers</h2>
+
+<p>All the information you need to start modifying Aurora and contributing back to the project.</p>
+
+<ul>
+<li><a href="contributing/">Contributing to the project</a></li>
+<li><a href="development/committers-guide/">Committer&rsquo;s Guide</a></li>
+<li><a href="development/design-documents/">Design Documents</a></li>
+<li>Developing the Aurora components:
+
+<ul>
+<li><a href="development/client/">Client</a></li>
+<li><a href="development/scheduler/">Scheduler</a></li>
+<li><a href="development/ui/">Scheduler UI</a></li>
+<li><a href="development/thermos/">Thermos</a></li>
+<li><a href="development/thrift/">Thrift structures</a></li>
+</ul></li>
+</ul>
+
+</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">&copy; 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>

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+++ aurora/site/publish/documentation/0.18.0/operations/backup-restore/index.html Wed Jun 21 06:36:21 2017
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+<!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;
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+  </head>
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+    <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 + '/operations/backup-restore/'"
+        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="recovering-from-a-scheduler-backup">Recovering from a Scheduler Backup</h1>
+
+<p><strong>Be sure to read the entire page before attempting to restore from a backup, as it may have
+unintended consequences.</strong></p>
+
+<h2 id="summary">Summary</h2>
+
+<p>The restoration procedure replaces the existing (possibly corrupted) Mesos replicated log with an
+earlier, backed up, version and requires all schedulers to be taken down temporarily while
+restoring. Once completed, the scheduler state resets to what it was when the backup was created.
+This means any jobs/tasks created or updated after the backup are unknown to the scheduler and will
+be killed shortly after the cluster restarts. All other tasks continue operating as normal.</p>
+
+<p>Usually, it is a bad idea to restore a backup that is not extremely recent (i.e. older than a few
+hours). This is because the scheduler will expect the cluster to look exactly as the backup does,
+so any tasks that have been rescheduled since the backup was taken will be killed.</p>
+
+<p>Instructions below have been verified in <a href="../../getting-started/vagrant/">Vagrant environment</a> and with minor
+syntax/path changes should be applicable to any Aurora cluster.</p>
+
+<h2 id="preparation">Preparation</h2>
+
+<p>Follow these steps to prepare the cluster for restoring from a backup:</p>
+
+<ul>
+<li><p>Stop all scheduler instances</p></li>
+<li><p>Consider blocking external traffic on a port defined in <code>-http_port</code> for all schedulers to
+prevent users from interacting with the scheduler during the restoration process. This will help
+troubleshooting by reducing the scheduler log noise and prevent users from making changes that will
+be erased after the backup snapshot is restored.</p></li>
+<li><p>Configure <code>aurora_admin</code> access to run all commands listed in
+<a href="#restore-from-backup">Restore from backup</a> section locally on the leading scheduler:</p>
+
+<ul>
+<li>Make sure the <a href="../../reference/client-cluster-configuration/">clusters.json</a> file configured to
+access scheduler directly. Set <code>scheduler_uri</code> setting and remove <code>zk</code>. Since leader can get
+re-elected during the restore steps, consider doing it on all scheduler replicas.</li>
+<li><p>Depending on your particular security approach you will need to either turn off scheduler
+authorization by removing scheduler <code>-http_authentication_mechanism</code> flag or make sure the
+direct scheduler access is properly authorized. E.g.: in case of Kerberos you will need to make
+a <code>/etc/hosts</code> file change to match your local IP to the scheduler URL configured in keytabs:</p>
+
+<p><local_ip> <scheduler_domain_in_keytabs></p></li>
+</ul></li>
+<li><p>Next steps are required to put scheduler into a partially disabled state where it would still be
+able to accept storage recovery requests but unable to schedule or change task states. This may be
+accomplished by updating the following scheduler configuration options:</p>
+
+<ul>
+<li>Set <code>-mesos_master_address</code> to a non-existent zk address. This will prevent scheduler from
+registering with Mesos. E.g.: <code>-mesos_master_address=zk://localhost:1111/mesos/master</code></li>
+<li><code>-max_registration_delay</code> - set to sufficiently long interval to prevent registration timeout
+and as a result scheduler suicide. E.g: <code>-max_registration_delay=360mins</code></li>
+<li>Make sure <code>-reconciliation_initial_delay</code> option is set high enough (e.g.: <code>365days</code>) to
+prevent accidental task GC. This is important as scheduler will attempt to reconcile the cluster
+state and will kill all tasks when restarted with an empty Mesos replicated log.</li>
+</ul></li>
+<li><p>Restart all schedulers</p></li>
+</ul>
+
+<h2 id="cleanup-and-re-initialize-mesos-replicated-log">Cleanup and re-initialize Mesos replicated log</h2>
+
+<p>Get rid of the corrupted files and re-initialize Mesos replicated log:</p>
+
+<ul>
+<li>Stop schedulers</li>
+<li>Delete all files under <code>-native_log_file_path</code> on all schedulers</li>
+<li>Initialize Mesos replica&rsquo;s log file: <code>sudo mesos-log initialize --path=&lt;-native_log_file_path&gt;</code></li>
+<li>Start schedulers</li>
+</ul>
+
+<h2 id="restore-from-backup">Restore from backup</h2>
+
+<p>At this point the scheduler is ready to rehydrate from the backup:</p>
+
+<ul>
+<li><p>Identify the leading scheduler by:</p>
+
+<ul>
+<li>examining the <code>scheduler_lifecycle_LEADER_AWAITING_REGISTRATION</code> metric at the scheduler
+<code>/vars</code> endpoint. Leader will have 1. All other replicas - 0.</li>
+<li>examining scheduler logs</li>
+<li>or examining Zookeeper registration under the path defined by <code>-zk_endpoints</code>
+and <code>-serverset_path</code></li>
+</ul></li>
+<li><p>Locate the desired backup file, copy it to the leading scheduler&rsquo;s <code>-backup_dir</code> folder and stage
+recovery by running the following command on a leader
+<code>aurora_admin scheduler_stage_recovery --bypass-leader-redirect &lt;cluster&gt; scheduler-backup-&lt;yyyy-MM-dd-HH-mm&gt;</code></p></li>
+<li><p>At this point, the recovery snapshot is staged and available for manual verification/modification
+via <code>aurora_admin scheduler_print_recovery_tasks --bypass-leader-redirect</code> and
+<code>scheduler_delete_recovery_tasks --bypass-leader-redirect</code> commands.
+See <code>aurora_admin help &lt;command&gt;</code> for usage details.</p></li>
+<li><p>Commit recovery. This instructs the scheduler to overwrite the existing Mesos replicated log with
+the provided backup snapshot and initiate a mandatory failover
+<code>aurora_admin scheduler_commit_recovery --bypass-leader-redirect  &lt;cluster&gt;</code></p></li>
+</ul>
+
+<h2 id="cleanup">Cleanup</h2>
+
+<p>Undo any modification done during <a href="#preparation">Preparation</a> sequence.</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">&copy; 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/operations/configuration/index.html
URL: http://svn.apache.org/viewvc/aurora/site/publish/documentation/0.18.0/operations/configuration/index.html?rev=1799392&view=auto
==============================================================================
--- aurora/site/publish/documentation/0.18.0/operations/configuration/index.html (added)
+++ aurora/site/publish/documentation/0.18.0/operations/configuration/index.html Wed Jun 21 06:36:21 2017
@@ -0,0 +1,497 @@
+<!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 -->
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+		    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 + '/operations/configuration/'"
+        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="scheduler-configuration">Scheduler Configuration</h1>
+
+<p>The Aurora scheduler can take a variety of configuration options through command-line arguments.
+Examples are available under <code>examples/scheduler/</code>. For a list of available Aurora flags and their
+documentation, see <a href="../../reference/scheduler-configuration/">Scheduler Configuration Reference</a>.</p>
+
+<h2 id="a-note-on-configuration">A Note on Configuration</h2>
+
+<p>Like Mesos, Aurora uses command-line flags for runtime configuration. As such the Aurora
+&ldquo;configuration file&rdquo; is typically a <code>scheduler.sh</code> shell script of the form.</p>
+<pre class="highlight shell"><code><span style="color: #999988;font-style: italic">#!/bin/bash</span>
+<span style="color: #008080">AURORA_HOME</span><span style="color: #000000;font-weight: bold">=</span>/usr/local/aurora-scheduler
+
+<span style="color: #999988;font-style: italic"># Flags controlling the JVM.</span>
+<span style="color: #008080">JAVA_OPTS</span><span style="color: #000000;font-weight: bold">=(</span>
+  -Xmx2g
+  -Xms2g
+  <span style="color: #999988;font-style: italic"># GC tuning, etc.</span>
+<span style="color: #000000;font-weight: bold">)</span>
+
+<span style="color: #999988;font-style: italic"># Flags controlling the scheduler.</span>
+<span style="color: #008080">AURORA_FLAGS</span><span style="color: #000000;font-weight: bold">=(</span>
+  <span style="color: #999988;font-style: italic"># Port for client RPCs and the web UI</span>
+  -http_port<span style="color: #000000;font-weight: bold">=</span>8081
+  <span style="color: #999988;font-style: italic"># Log configuration, etc.</span>
+<span style="color: #000000;font-weight: bold">)</span>
+
+<span style="color: #999988;font-style: italic"># Environment variables controlling libmesos</span>
+<span style="color: #0086B3">export </span><span style="color: #008080">JAVA_HOME</span><span style="color: #000000;font-weight: bold">=</span>...
+<span style="color: #0086B3">export </span><span style="color: #008080">GLOG_v</span><span style="color: #000000;font-weight: bold">=</span>1
+<span style="color: #0086B3">export </span><span style="color: #008080">LIBPROCESS_PORT</span><span style="color: #000000;font-weight: bold">=</span>8083
+<span style="color: #0086B3">export </span><span style="color: #008080">LIBPROCESS_IP</span><span style="color: #000000;font-weight: bold">=</span>192.168.33.7
+
+<span style="color: #008080">JAVA_OPTS</span><span style="color: #000000;font-weight: bold">=</span><span style="color: #d14">"</span><span style="color: #000000;font-weight: bold">${</span><span style="color: #008080">JAVA_OPTS</span><span style="background-color: #f8f8f8">[*]</span><span style="color: #000000;font-weight: bold">}</span><span style="color: #d14">"</span> <span style="color: #0086B3">exec</span> <span style="color: #d14">"</span><span style="color: #008080">$AURORA_HOME</span><span style="color: #d14">/bin/aurora-scheduler"</span> <span style="color: #d14">"</span><span style="color: #000000;font-weight: bold">${</span><span style="color: #008080">AURORA_FLAGS</span><span style="background-color: #f8f8f8">[@]</span><span style="color: #000000;font-weight: bold">}</span><span style="color: #d14">"</span>
+</code></pre>
+
+<p>That way Aurora&rsquo;s current flags are visible in <code>ps</code> and in the <code>/vars</code> admin endpoint.</p>
+
+<h2 id="jvm-configuration">JVM Configuration</h2>
+
+<p>JVM settings are dependent on your environment and cluster size. They might require
+custom tuning. As a starting point, we recommend:</p>
+
+<ul>
+<li>Ensure the initial (<code>-Xms</code>) and maximum (<code>-Xmx</code>) heap size are idential to prevent heap resizing
+at runtime.</li>
+<li>Either <code>-XX:+UseConcMarkSweepGC</code> or <code>-XX:+UseG1GC -XX:+UseStringDeduplication</code> are
+sane defaults for the garbage collector.</li>
+<li><code>-Djava.net.preferIPv4Stack=true</code> makes sense in most cases as well.</li>
+</ul>
+
+<h2 id="network-configuration">Network Configuration</h2>
+
+<p>By default, Aurora binds to all interfaces and auto-discovers its hostname. To reduce ambiguity
+it helps to hardcode them though:</p>
+<pre class="highlight plaintext"><code>-http_port=8081
+-ip=192.168.33.7
+-hostname="aurora1.us-east1.example.org"
+</code></pre>
+
+<p>Two environment variables control the ip and port for the communication with the Mesos master
+and for the replicated log used by Aurora:</p>
+<pre class="highlight plaintext"><code>export LIBPROCESS_PORT=8083
+export LIBPROCESS_IP=192.168.33.7
+</code></pre>
+
+<p>It is important that those can be reached from all Mesos master and Aurora scheduler instances.</p>
+
+<h2 id="replicated-log-configuration">Replicated Log Configuration</h2>
+
+<p>Aurora schedulers use ZooKeeper to discover log replicas and elect a leader. Only one scheduler is
+leader at a given time - the other schedulers follow log writes and prepare to take over as leader
+but do not communicate with the Mesos master. Either 3 or 5 schedulers are recommended in a
+production deployment depending on failure tolerance and they must have persistent storage.</p>
+
+<p>Below is a summary of scheduler storage configuration flags that either don&rsquo;t have default values
+or require attention before deploying in a production environment.</p>
+
+<h3 id="native_log_quorum_size"><code>-native_log_quorum_size</code></h3>
+
+<p>Defines the Mesos replicated log quorum size. In a cluster with <code>N</code> schedulers, the flag
+<code>-native_log_quorum_size</code> should be set to <code>floor(N/2) + 1</code>. So in a cluster with 1 scheduler
+it should be set to <code>1</code>, in a cluster with 3 it should be set to <code>2</code>, and in a cluster of 5 it
+should be set to <code>3</code>.</p>
+
+<table><thead>
+<tr>
+<th>Number of schedulers (N)</th>
+<th><code>-native_log_quorum_size</code> setting (<code>floor(N/2) + 1</code>)</th>
+</tr>
+</thead><tbody>
+<tr>
+<td>1</td>
+<td>1</td>
+</tr>
+<tr>
+<td>3</td>
+<td>2</td>
+</tr>
+<tr>
+<td>5</td>
+<td>3</td>
+</tr>
+<tr>
+<td>7</td>
+<td>4</td>
+</tr>
+</tbody></table>
+
+<p><em>Incorrectly setting this flag will cause data corruption to occur!</em></p>
+
+<h3 id="native_log_file_path"><code>-native_log_file_path</code></h3>
+
+<p>Location of the Mesos replicated log files. For optimal and consistent performance, consider
+allocating a dedicated disk (preferably SSD) for the replicated log. Ensure that this disk is not
+used by anything else (e.g. no process logging) and in particular that it is a real disk
+and not just a partition.</p>
+
+<p>Even when a dedicated disk is used, switching from <code>CFQ</code> to <code>deadline</code> I/O scheduler of Linux kernel
+can furthermore help with storage performance in Aurora (<a href="https://issues.apache.org/jira/browse/AURORA-1211">see this ticket for details</a>).</p>
+
+<h3 id="native_log_zk_group_path"><code>-native_log_zk_group_path</code></h3>
+
+<p>ZooKeeper path used for Mesos replicated log quorum discovery.</p>
+
+<p>See <a href="https://github.com/apache/aurora/blob/rel/0.18.0/src/main/java/org/apache/aurora/scheduler/log/mesos/MesosLogStreamModule.java">code</a> for
+other available Mesos replicated log configuration options and default values.</p>
+
+<h3 id="changing-the-quorum-size">Changing the Quorum Size</h3>
+
+<p>Special care needs to be taken when changing the size of the Aurora scheduler quorum.
+Since Aurora uses a Mesos replicated log, similar steps need to be followed as when
+<a href="http://mesos.apache.org/documentation/latest/operational-guide">changing the Mesos quorum size</a>.</p>
+
+<p>As a preparation, increase <code>-native_log_quorum_size</code> on each existing scheduler and restart them.
+When updating from 3 to 5 schedulers, the quorum size would grow from 2 to 3.</p>
+
+<p>When starting the new schedulers, use the <code>-native_log_quorum_size</code> set to the new value. Failing to
+first increase the quorum size on running schedulers can in some cases result in corruption
+or truncating of the replicated log used by Aurora. In that case, see the documentation on
+<a href="../backup-restore/">recovering from backup</a>.</p>
+
+<h2 id="backup-configuration">Backup Configuration</h2>
+
+<p>Configuration options for the Aurora scheduler backup manager.</p>
+
+<ul>
+<li><code>-backup_interval</code>: The interval on which the scheduler writes local storage backups.
+The default is every hour.</li>
+<li><code>-backup_dir</code>: Directory to write backups to. As stated above, this should not be co-located on the
+same disk as the replicated log.</li>
+<li><code>-max_saved_backups</code>: Maximum number of backups to retain before deleting the oldest backup(s).</li>
+</ul>
+
+<h2 id="resource-isolation">Resource Isolation</h2>
+
+<p>For proper CPU, memory, and disk isolation as mentioned in our <a href="../../features/resource-isolation/">enduser documentation</a>,
+we recommend to add the following isolators to the <code>--isolation</code> flag of the Mesos agent:</p>
+
+<ul>
+<li><code>cgroups/cpu</code></li>
+<li><code>cgroups/mem</code></li>
+<li><code>disk/du</code></li>
+</ul>
+
+<p>In addition, we recommend to set the following <a href="http://mesos.apache.org/documentation/latest/configuration/">agent flags</a>:</p>
+
+<ul>
+<li><code>--cgroups_limit_swap</code> to enable memory limits on both memory and swap instead of just memory.
+Alternatively, you could disable swap on your agent hosts.</li>
+<li><code>--cgroups_enable_cfs</code> to enable hard limits on CPU resources via the CFS bandwidth limiting
+feature.</li>
+<li><code>--enforce_container_disk_quota</code> to enable disk quota enforcement for containers.</li>
+</ul>
+
+<p>To enable the optional GPU support in Mesos, please see the GPU related flags in the
+<a href="http://mesos.apache.org/documentation/latest/configuration/">Mesos configuration</a>.
+To enable the corresponding feature in Aurora, you have to start the scheduler with the
+flag</p>
+<pre class="highlight plaintext"><code>-allow_gpu_resource=true
+</code></pre>
+
+<p>If you want to use revocable resources, first follow the
+<a href="http://mesos.apache.org/documentation/latest/oversubscription/">Mesos oversubscription documentation</a>
+and then set set this Aurora scheduler flag to allow receiving revocable Mesos offers:</p>
+<pre class="highlight plaintext"><code>-receive_revocable_resources=true
+</code></pre>
+
+<p>Both CPUs and RAM are supported as revocable resources. The former is enabled by the default,
+the latter needs to be enabled via:</p>
+<pre class="highlight plaintext"><code>-enable_revocable_ram=true
+</code></pre>
+
+<p>Unless you want to use the <a href="https://github.com/apache/aurora/blob/rel/0.18.0/src/main/resources/org/apache/aurora/scheduler/tiers.json">default</a>
+tier configuration, you will also have to specify a file path:</p>
+<pre class="highlight plaintext"><code>-tier_config=path/to/tiers/config.json
+</code></pre>
+
+<h2 id="multi-framework-setup">Multi-Framework Setup</h2>
+
+<p>Aurora holds onto Mesos offers in order to provide efficient scheduling and
+<a href="../../features/multitenancy/#preemption">preemption</a>. This is problematic in multi-framework
+environments as Aurora might starve other frameworks.</p>
+
+<p>With a downside of increased scheduling latency, Aurora can be configured to be more cooperative:</p>
+
+<ul>
+<li>Lowering <code>-min_offer_hold_time</code> (e.g. to <code>1mins</code>) can ensure unused offers are returned back to
+Mesos more frequently.</li>
+<li>Increasing <code>-offer_filter_duration</code> (e.g to <code>30secs</code>) will instruct Mesos
+not to re-offer rejected resources for the given duration.</li>
+</ul>
+
+<p>Setting a <a href="http://mesos.apache.org/documentation/latest/quota/">minimum amount of resources</a> for
+each Mesos role can furthermore help to ensure no framework is starved entirely.</p>
+
+<h2 id="containers">Containers</h2>
+
+<p>Both the Mesos and Docker containerizers require configuration of the Mesos agent.</p>
+
+<h3 id="mesos-containerizer">Mesos Containerizer</h3>
+
+<p>The minimal agent configuration requires to enable Docker and Appc image support for the Mesos
+containerizer:</p>
+<pre class="highlight plaintext"><code>--containerizers=mesos
+--image_providers=appc,docker
+--isolation=filesystem/linux,docker/runtime  # as an addition to your other isolators
+</code></pre>
+
+<p>Further details can be found in the corresponding <a href="http://mesos.apache.org/documentation/latest/container-image/">Mesos documentation</a>.</p>
+
+<h3 id="docker-containerizer">Docker Containerizer</h3>
+
+<p>The <a href="http://mesos.apache.org/documentation/latest/docker-containerizer/">Docker containerizer</a>
+requires the Docker engine is installed on each agent host. In addition, it  must be enabled on the
+Mesos agents by launching them with the option:</p>
+<pre class="highlight plaintext"><code>--containerizers=mesos,docker
+</code></pre>
+
+<p>If you would like to run a container with a read-only filesystem, it may also be necessary to use
+the scheduler flag <code>-thermos_home_in_sandbox</code> in order to set HOME to the sandbox
+before the executor runs. This will make sure that the executor/runner PEX extractions happens
+inside of the sandbox instead of the container filesystem root.</p>
+
+<p>If you would like to supply your own parameters to <code>docker run</code> when launching jobs in docker
+containers, you may use the following flags:</p>
+<pre class="highlight plaintext"><code>-allow_docker_parameters
+-default_docker_parameters
+</code></pre>
+
+<p><code>-allow_docker_parameters</code> controls whether or not users may pass their own configuration parameters
+through the job configuration files. If set to <code>false</code> (the default), the scheduler will reject
+jobs with custom parameters. <em>NOTE</em>: this setting should be used with caution as it allows any job
+owner to specify any parameters they wish, including those that may introduce security concerns
+(<code>privileged=true</code>, for example).</p>
+
+<p><code>-default_docker_parameters</code> allows a cluster operator to specify a universal set of parameters that
+should be used for every container that does not have parameters explicitly configured at the job
+level. The argument accepts a multimap format:</p>
+<pre class="highlight plaintext"><code>-default_docker_parameters="read-only=true,tmpfs=/tmp,tmpfs=/run"
+</code></pre>
+
+<h3 id="common-options">Common Options</h3>
+
+<p>The following Aurora options work for both containerizers.</p>
+
+<p>A scheduler flag, <code>-global_container_mounts</code> allows mounting paths from the host (i.e the agent machine)
+into all containers on that host. The format is a comma separated list of host<em>path:container</em>path[:mode]
+tuples. For example <code>-global_container_mounts=/opt/secret_keys_dir:/mnt/secret_keys_dir:ro</code> mounts
+<code>/opt/secret_keys_dir</code> from the agents into all launched containers. Valid modes are <code>ro</code> and <code>rw</code>.</p>
+
+<h2 id="thermos-process-logs">Thermos Process Logs</h2>
+
+<h3 id="log-destination">Log destination</h3>
+
+<p>By default, Thermos will write process stdout/stderr to log files in the sandbox. Process object
+configuration allows specifying alternate log file destinations like streamed stdout/stderr or
+suppression of all log output. Default behavior can be configured for the entire cluster with the
+following flag (through the <code>-thermos_executor_flags</code> argument to the Aurora scheduler):</p>
+<pre class="highlight plaintext"><code>--runner-logger-destination=both
+</code></pre>
+
+<p><code>both</code> configuration will send logs to files and stream to parent stdout/stderr outputs.</p>
+
+<p>See <a href="../../reference/configuration/#logger">Configuration Reference</a> for all destination options.</p>
+
+<h3 id="log-rotation">Log rotation</h3>
+
+<p>By default, Thermos will not rotate the stdout/stderr logs from child processes and they will grow
+without bound. An individual user may change this behavior via configuration on the Process object,
+but it may also be desirable to change the default configuration for the entire cluster.
+In order to enable rotation by default, the following flags can be applied to Thermos (through the
+<code>-thermos_executor_flags</code> argument to the Aurora scheduler):</p>
+<pre class="highlight plaintext"><code>--runner-logger-mode=rotate
+--runner-rotate-log-size-mb=100
+--runner-rotate-log-backups=10
+</code></pre>
+
+<p>In the above example, each instance of the Thermos runner will rotate stderr/stdout logs once they
+reach 100 MiB in size and keep a maximum of 10 backups. If a user has provided a custom setting for
+their process, it will override these default settings.</p>
+
+<h2 id="thermos-executor-wrapper">Thermos Executor Wrapper</h2>
+
+<p>If you need to do computation before starting the Thermos executor (for example, setting a different
+<code>--announcer-hostname</code> parameter for every executor), then the Thermos executor should be invoked
+inside a wrapper script. In such a case, the aurora scheduler should be started with
+<code>-thermos_executor_path</code> pointing to the wrapper script and <code>-thermos_executor_resources</code> set to a
+comma separated string of all the resources that should be copied into the sandbox (including the
+original Thermos executor). Ensure the wrapper script does not access resources outside of the
+sandbox, as when the script is run from within a Docker container those resources may not exist.</p>
+
+<p>For example, to wrap the executor inside a simple wrapper, the scheduler will be started like this
+<code>-thermos_executor_path=/path/to/wrapper.sh -thermos_executor_resources=/usr/share/aurora/bin/thermos_executor.pex</code></p>
+
+<h2 id="custom-executors">Custom Executors</h2>
+
+<p>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>For more information on this feature please see the custom executors <a href="../../features/custom-executors/">documentation</a>.</p>
+
+<h2 id="a-note-on-increasing-executor-overhead">A note on increasing executor overhead</h2>
+
+<p>Increasing executor overhead on an existing cluster, whether it be for custom executors or for Thermos,
+will result in degraded preemption performance until all task which began life with the previous
+executor configuration with less overhead are preempted/restarted.</p>
+
+<h2 id="controlling-mtta-via-update-affinity">Controlling MTTA via Update Affinity</h2>
+
+<p>When there is high resource contention in your cluster you may experience noticably elevated job update
+times, as well as high task churn across the cluster. This is due to Aurora&rsquo;s first-fit scheduling
+algorithm. To alleviate this, you can enable update affinity where the Scheduler will make a best-effort
+attempt to reuse the same agent for the updated task (so long as the resources for the job are not being
+increased).</p>
+
+<p>To enable this in the Scheduler, you can set the following options:</p>
+<pre class="highlight plaintext"><code>--enable_update_affinity=true
+--update_affinity_reservation_hold_time=3mins
+</code></pre>
+
+<p>You will need to tune the hold time to match the behavior you see in your cluster. If you have extremely
+high update throughput, you might have to extend it as processing updates could easily add significant
+delays between scheduling attempts. You may also have to tune scheduling parameters to achieve the
+throughput you need in your cluster. Some relevant settings (with defaults) are:</p>
+<pre class="highlight plaintext"><code>--max_schedule_attempts_per_sec=40
+--initial_schedule_penalty=1secs
+--max_schedule_penalty=1mins
+--scheduling_max_batch_size=3
+--max_tasks_per_schedule_attempt=5
+</code></pre>
+
+<p>There are metrics exposed by the Scheduler which can provide guidance on where the bottleneck is.
+Example metrics to look at:</p>
+<pre class="highlight plaintext"><code>- schedule_attempts_blocks (if this number is greater than 0, then task throughput is hitting
+                            limits controlled by --max_scheduler_attempts_per_sec)
+- scheduled_task_penalty_* (metrics around scheduling penalties for tasks, if the numbers here are high
+                            then you could have high contention for resources)
+</code></pre>
+
+<p>Most likely you&rsquo;ll run into limits with the number of update instances that can be processed per minute
+before you run into any other limits. So if your total work done per minute starts to exceed 2k instances,
+you may need to extend the update<em>affinity</em>reservation<em>hold</em>time.</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">&copy; 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>

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--- aurora/site/publish/documentation/0.18.0/operations/installation/index.html (added)
+++ aurora/site/publish/documentation/0.18.0/operations/installation/index.html Wed Jun 21 06:36:21 2017
@@ -0,0 +1,398 @@
+<!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">
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+	</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 + '/operations/installation/'"
+        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="installing-aurora">Installing Aurora</h1>
+
+<p>Source and binary distributions can be found on our
+<a href="https://aurora.apache.org/downloads/">downloads</a> page.  Installing from binary packages is
+recommended for most.</p>
+
+<ul>
+<li><a href="#installing-the-scheduler">Installing the scheduler</a></li>
+<li><a href="#installing-worker-components">Installing worker components</a></li>
+<li><a href="#installing-the-client">Installing the client</a></li>
+<li><a href="#installing-mesos">Installing Mesos</a></li>
+<li><a href="#troubleshooting">Troubleshooting</a></li>
+</ul>
+
+<p>If our binay packages don&rsquo;t suite you, our package build toolchain makes it easy to build your
+own packages. See the <a href="https://github.com/apache/aurora-packaging">instructions</a> to learn how.</p>
+
+<h2 id="machine-profiles">Machine profiles</h2>
+
+<p>Given that many of these components communicate over the network, there are numerous ways you could
+assemble them to create an Aurora cluster.  The simplest way is to think in terms of three machine
+profiles:</p>
+
+<h3 id="coordinator">Coordinator</h3>
+
+<p><strong>Components</strong>: ZooKeeper, Aurora scheduler, Mesos master</p>
+
+<p>A small number of machines (typically 3 or 5) responsible for cluster orchestration.  In most cases
+it is fine to co-locate these components in anything but very large clusters (&gt; 1000 machines).
+Beyond that point, operators will likely want to manage these services on separate machines.
+In particular, you will want to use separate ZooKeeper ensembles for leader election and
+service discovery. Otherwise a service discovery error or outage can take down the entire cluster.</p>
+
+<p>In practice, 5 coordinators have been shown to reliably manage clusters with tens of thousands of
+machines.</p>
+
+<h3 id="worker">Worker</h3>
+
+<p><strong>Components</strong>: Aurora executor, Aurora observer, Mesos agent</p>
+
+<p>The bulk of the cluster, where services will actually run.</p>
+
+<h3 id="client">Client</h3>
+
+<p><strong>Components</strong>: Aurora client, Aurora admin client</p>
+
+<p>Any machines that users submit jobs from.</p>
+
+<h2 id="installing-the-scheduler">Installing the scheduler</h2>
+
+<h3 id="ubuntu-trusty">Ubuntu Trusty</h3>
+
+<ol>
+<li><p>Install Mesos
+Skip down to <a href="#mesos-on-ubuntu-trusty">install mesos</a>, then run:</p>
+<pre class="highlight plaintext"><code>sudo start mesos-master
+</code></pre></li>
+<li><p>Install ZooKeeper</p>
+<pre class="highlight plaintext"><code>sudo apt-get install -y zookeeperd
+</code></pre></li>
+<li><p>Install the Aurora scheduler</p>
+<pre class="highlight plaintext"><code>sudo add-apt-repository -y ppa:openjdk-r/ppa
+sudo apt-get update
+sudo apt-get install -y openjdk-8-jre-headless wget
+
+sudo update-alternatives --set java /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java
+
+wget -c https://apache.bintray.com/aurora/ubuntu-trusty/aurora-scheduler_0.17.0_amd64.deb
+sudo dpkg -i aurora-scheduler_0.17.0_amd64.deb
+</code></pre></li>
+</ol>
+
+<h3 id="centos-7">CentOS 7</h3>
+
+<ol>
+<li><p>Install Mesos
+Skip down to <a href="#mesos-on-centos-7">install mesos</a>, then run:</p>
+<pre class="highlight plaintext"><code>sudo systemctl start mesos-master
+</code></pre></li>
+<li><p>Install ZooKeeper</p>
+<pre class="highlight plaintext"><code>sudo rpm -Uvh https://archive.cloudera.com/cdh4/one-click-install/redhat/6/x86_64/cloudera-cdh-4-0.x86_64.rpm
+sudo yum install -y java-1.8.0-openjdk-headless zookeeper-server
+
+sudo service zookeeper-server init
+sudo systemctl start zookeeper-server
+</code></pre></li>
+<li><p>Install the Aurora scheduler</p>
+<pre class="highlight plaintext"><code>sudo yum install -y wget
+
+wget -c https://apache.bintray.com/aurora/centos-7/aurora-scheduler-0.17.0-1.el7.centos.aurora.x86_64.rpm
+sudo yum install -y aurora-scheduler-0.17.0-1.el7.centos.aurora.x86_64.rpm
+</code></pre></li>
+</ol>
+
+<h3 id="finalizing">Finalizing</h3>
+
+<p>By default, the scheduler will start in an uninitialized mode.  This is because external
+coordination is necessary to be certain operator error does not result in a quorum of schedulers
+starting up and believing their databases are empty when in fact they should be re-joining a
+cluster.</p>
+
+<p>Because of this, a fresh install of the scheduler will need intervention to start up.  First,
+stop the scheduler service.
+Ubuntu: <code>sudo stop aurora-scheduler</code>
+CentOS: <code>sudo systemctl stop aurora</code></p>
+
+<p>Now initialize the database:</p>
+<pre class="highlight plaintext"><code>sudo -u aurora mkdir -p /var/lib/aurora/scheduler/db
+sudo -u aurora mesos-log initialize --path=/var/lib/aurora/scheduler/db
+</code></pre>
+
+<p>Now you can start the scheduler back up.
+Ubuntu: <code>sudo start aurora-scheduler</code>
+CentOS: <code>sudo systemctl start aurora</code></p>
+
+<h2 id="installing-worker-components">Installing worker components</h2>
+
+<h3 id="ubuntu-trusty">Ubuntu Trusty</h3>
+
+<ol>
+<li><p>Install Mesos
+Skip down to <a href="#mesos-on-ubuntu-trusty">install mesos</a>, then run:</p>
+<pre class="highlight plaintext"><code>start mesos-slave
+</code></pre></li>
+<li><p>Install Aurora executor and observer</p>
+<pre class="highlight plaintext"><code>sudo apt-get install -y python2.7 wget
+
+# NOTE: This appears to be a missing dependency of the mesos deb package and is needed
+# for the python mesos native bindings.
+sudo apt-get -y install libcurl4-nss-dev
+
+wget -c https://apache.bintray.com/aurora/ubuntu-trusty/aurora-executor_0.17.0_amd64.deb
+sudo dpkg -i aurora-executor_0.17.0_amd64.deb
+</code></pre></li>
+</ol>
+
+<h3 id="centos-7">CentOS 7</h3>
+
+<ol>
+<li><p>Install Mesos
+Skip down to <a href="#mesos-on-centos-7">install mesos</a>, then run:</p>
+<pre class="highlight plaintext"><code>sudo systemctl start mesos-slave
+</code></pre></li>
+<li><p>Install Aurora executor and observer</p>
+<pre class="highlight plaintext"><code>sudo yum install -y python2 wget
+
+wget -c https://apache.bintray.com/aurora/centos-7/aurora-executor-0.17.0-1.el7.centos.aurora.x86_64.rpm
+sudo yum install -y aurora-executor-0.17.0-1.el7.centos.aurora.x86_64.rpm
+</code></pre></li>
+</ol>
+
+<h3 id="worker-configuration">Worker Configuration</h3>
+
+<p>The executor typically does not require configuration.  Command line arguments can
+be passed to the executor using a command line argument on the scheduler.</p>
+
+<p>The observer needs to be configured to look at the correct mesos directory in order to find task
+sandboxes. You should 1st find the Mesos working directory by looking for the Mesos agent
+<code>--work_dir</code> flag. You should see something like:</p>
+<pre class="highlight plaintext"><code>    ps -eocmd | grep "mesos-slave" | grep -v grep | tr ' ' '\n' | grep "\--work_dir"
+    --work_dir=/var/lib/mesos
+</code></pre>
+
+<p>If the flag is not set, you can view the default value like so:</p>
+<pre class="highlight plaintext"><code>    mesos-slave --help
+    Usage: mesos-slave [options]
+
+      ...
+      --work_dir=VALUE      Directory path to place framework work directories
+                            (default: /tmp/mesos)
+      ...
+</code></pre>
+
+<p>The value you find for <code>--work_dir</code>, <code>/var/lib/mesos</code> in this example, should match the Aurora
+observer value for <code>--mesos-root</code>.  You can look for that setting in a similar way on a worker
+node by grepping for <code>thermos_observer</code> and <code>--mesos-root</code>.  If the flag is not set, you can view
+the default value like so:</p>
+<pre class="highlight plaintext"><code>    thermos_observer -h
+    Options:
+      ...
+      --mesos-root=MESOS_ROOT
+                            The mesos root directory to search for Thermos
+                            executor sandboxes [default: /var/lib/mesos]
+      ...
+</code></pre>
+
+<p>In this case the default is <code>/var/lib/mesos</code> and we have a match. If there is no match, you can
+either adjust the mesos-master start script(s) and restart the master(s) or else adjust the
+Aurora observer start scripts and restart the observers.  To adjust the Aurora observer:</p>
+
+<h4 id="ubuntu-trusty">Ubuntu Trusty</h4>
+<pre class="highlight plaintext"><code>sudo sh -c 'echo "MESOS_ROOT=/tmp/mesos" &gt;&gt; /etc/default/thermos'
+</code></pre>
+
+<h4 id="centos-7">CentOS 7</h4>
+
+<p>Make an edit to add the <code>--mesos-root</code> flag resulting in something like:</p>
+<pre class="highlight plaintext"><code>grep -A5 OBSERVER_ARGS /etc/sysconfig/thermos
+OBSERVER_ARGS=(
+  --port=1338
+  --mesos-root=/tmp/mesos
+  --log_to_disk=NONE
+  --log_to_stderr=google:INFO
+)
+</code></pre>
+
+<h2 id="installing-the-client">Installing the client</h2>
+
+<h3 id="ubuntu-trusty">Ubuntu Trusty</h3>
+<pre class="highlight plaintext"><code>sudo apt-get install -y python2.7 wget
+
+wget -c https://apache.bintray.com/aurora/ubuntu-trusty/aurora-tools_0.17.0_amd64.deb
+sudo dpkg -i aurora-tools_0.17.0_amd64.deb
+</code></pre>
+
+<h3 id="centos-7">CentOS 7</h3>
+<pre class="highlight plaintext"><code>sudo yum install -y python2 wget
+
+wget -c https://apache.bintray.com/aurora/centos-7/aurora-tools-0.17.0-1.el7.centos.aurora.x86_64.rpm
+sudo yum install -y aurora-tools-0.17.0-1.el7.centos.aurora.x86_64.rpm
+</code></pre>
+
+<h3 id="mac-os-x">Mac OS X</h3>
+<pre class="highlight plaintext"><code>brew upgrade
+brew install aurora-cli
+</code></pre>
+
+<h3 id="client-configuration">Client Configuration</h3>
+
+<p>Client configuration lives in a json file that describes the clusters available and how to reach
+them.  By default this file is at <code>/etc/aurora/clusters.json</code>.</p>
+
+<p>Jobs may be submitted to the scheduler using the client, and are described with
+<a href="../../reference/configuration/">job configurations</a> expressed in <code>.aurora</code> files.  Typically you will
+maintain a single job configuration file to describe one or more deployment environments (e.g.
+dev, test, prod) for a production job.</p>
+
+<h2 id="installing-mesos">Installing Mesos</h2>
+
+<p>Mesos uses a single package for the Mesos master and agent.  As a result, the package dependencies
+are identical for both.</p>
+
+<h3 id="mesos-on-ubuntu-trusty">Mesos on Ubuntu Trusty</h3>
+<pre class="highlight plaintext"><code>sudo apt-key adv --keyserver keyserver.ubuntu.com --recv E56151BF
+DISTRO=$(lsb_release -is | tr '[:upper:]' '[:lower:]')
+CODENAME=$(lsb_release -cs)
+
+echo "deb http://repos.mesosphere.io/${DISTRO} ${CODENAME} main" | \
+  sudo tee /etc/apt/sources.list.d/mesosphere.list
+sudo apt-get -y update
+
+# Use `apt-cache showpkg mesos | grep [version]` to find the exact version.
+sudo apt-get -y install mesos=1.1.0-2.0.107.ubuntu1404_amd64.deb
+</code></pre>
+
+<h3 id="mesos-on-centos-7">Mesos on CentOS 7</h3>
+<pre class="highlight plaintext"><code>sudo rpm -Uvh https://repos.mesosphere.io/el/7/noarch/RPMS/mesosphere-el-repo-7-1.noarch.rpm
+sudo yum -y install mesos-1.1.0
+</code></pre>
+
+<h2 id="troubleshooting">Troubleshooting</h2>
+
+<p>So you&rsquo;ve started your first cluster and are running into some issues? We&rsquo;ve collected some common
+stumbling blocks and solutions in our <a href="../troubleshooting/">Troubleshooting guide</a> to help get you moving.</p>
+
+</div>
+
+      </div>
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+			<p class="disclaimer">&copy; 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>
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