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From s...@apache.org
Subject svn commit: r1748470 [4/19] - in /aurora/site: data/ publish/ publish/blog/ publish/blog/aurora-0-14-0-released/ publish/documentation/0.10.0/ publish/documentation/0.10.0/build-system/ publish/documentation/0.10.0/client-cluster-configuration/ publish...
Date Tue, 14 Jun 2016 21:35:30 GMT
Added: aurora/site/publish/documentation/0.14.0/development/thermos/index.html
URL: http://svn.apache.org/viewvc/aurora/site/publish/documentation/0.14.0/development/thermos/index.html?rev=1748470&view=auto
==============================================================================
--- aurora/site/publish/documentation/0.14.0/development/thermos/index.html (added)
+++ aurora/site/publish/documentation/0.14.0/development/thermos/index.html Tue Jun 14 21:35:25 2016
@@ -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 + '/development/thermos/'"
+        value="0.14.0">
+  <option value="0.14.0"
+    selected="selected">
+    0.14.0
+      (latest)
+  </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>
+<p>The Python components of Aurora are built using <a href="https://pantsbuild.github.io">Pants</a>.</p>
+
+<h1 id="python-build-conventions">Python Build Conventions</h1>
+
+<p>The Python code is laid out according to the following conventions:</p>
+
+<ol>
+<li><p>1 <code>BUILD</code> per 3rd level directory. For a list of current top-level packages run:</p>
+<pre class="highlight plaintext"><code>% find src/main/python -maxdepth 3 -mindepth 3 -type d |\
+while read dname; do echo $dname |\
+    sed 's@src/main/python/\(.*\)/\(.*\)/\(.*\).*@\1.\2.\3@'; done
+</code></pre></li>
+<li><p>Each <code>BUILD</code> file exports 1
+<a href="https://pantsbuild.github.io/build_dictionary.html#bdict_python_library"><code>python_library</code></a>
+that provides a
+<a href="https://pantsbuild.github.io/build_dictionary.html#setup_py"><code>setup_py</code></a>
+containing each
+<a href="https://pantsbuild.github.io/build_dictionary.html#python_binary"><code>python_binary</code></a>
+in the <code>BUILD</code> file, named the same as the directory it&rsquo;s in so that it can be referenced
+without a &rsquo;:&rsquo; character. The <code>sources</code> field in the <code>python_library</code> will almost always be
+<code>rglobs(&#39;*.py&#39;)</code>.</p></li>
+<li><p>Other BUILD files may only depend on this single public <code>python_library</code>
+target. Any other target is considered a private implementation detail and
+should be prefixed with an <code>_</code>.</p></li>
+<li><p><code>python_binary</code> targets are always named the same as the exported console script.</p></li>
+<li><p><code>python_binary</code> targets must have identical <code>dependencies</code> to the <code>python_library</code> exported
+by the package and must use <code>entry_point</code>.</p>
+
+<p>The means a PEX file generated by pants will contain exactly the same files that will be
+available on the <code>PYTHONPATH</code> in the case of <code>pip install</code> of the corresponding library
+target. This will help our migration off of Pants in the future.</p></li>
+</ol>
+
+<h2 id="annotated-example-apache-thermos-runner">Annotated example - apache.thermos.runner</h2>
+<pre class="highlight plaintext"><code>% find src/main/python/apache/thermos/runner
+src/main/python/apache/thermos/runner
+src/main/python/apache/thermos/runner/__init__.py
+src/main/python/apache/thermos/runner/thermos_runner.py
+src/main/python/apache/thermos/runner/BUILD
+% cat src/main/python/apache/thermos/runner/BUILD
+# License boilerplate omitted
+import os
+
+
+# Private target so that a setup_py can exist without a circular dependency. Only targets within
+# this file should depend on this.
+python_library(
+  name = '_runner',
+  # The target covers every python file under this directory and subdirectories.
+  sources = rglobs('*.py'),
+  dependencies = [
+    '3rdparty/python:twitter.common.app',
+    '3rdparty/python:twitter.common.log',
+    # Source dependencies are always referenced without a ':'.
+    'src/main/python/apache/thermos/common',
+    'src/main/python/apache/thermos/config',
+    'src/main/python/apache/thermos/core',
+  ],
+)
+
+# Binary target for thermos_runner.pex. Nothing should depend on this - it's only used as an
+# argument to ./pants binary.
+python_binary(
+  name = 'thermos_runner',
+  # Use entry_point, not source so the files used here are the same ones tests see.
+  entry_point = 'apache.thermos.bin.thermos_runner',
+  dependencies = [
+    # Notice that we depend only on the single private target from this BUILD file here.
+    ':_runner',
+  ],
+)
+
+# The public library that everyone importing the runner symbols uses.
+# The test targets and any other dependent source code should depend on this.
+python_library(
+  name = 'runner',
+  dependencies = [
+    # Again, notice that we depend only on the single private target from this BUILD file here.
+    ':_runner',
+  ],
+  # We always provide a setup_py. This will cause any dependee libraries to automatically
+  # reference this library in their requirements.txt rather than copy the source files into their
+  # sdist.
+  provides = setup_py(
+    # Conventionally named and versioned.
+    name = 'apache.thermos.runner',
+    version = open(os.path.join(get_buildroot(), '.auroraversion')).read().strip().upper(),
+  ).with_binaries({
+    # Every binary in this file should also be repeated here.
+    # Always use the dict-form of .with_binaries so that commands with dashes in their names are
+    # supported.
+    # The console script name is always the same as the PEX with .pex stripped.
+    'thermos_runner': ':thermos_runner',
+  }),
+)
+</code></pre>
+
+<h1 id="thermos-test-resources">Thermos Test resources</h1>
+
+<p>The Aurora source repository and distributions contain several
+<a href="../../src/test/resources/org/apache/thermos/root/checkpoints">binary files</a> to
+qualify the backwards-compatibility of thermos with checkpoint data. Since
+thermos persists state to disk, to be read by the thermos observer), it is important that we have
+tests that prevent regressions affecting the ability to parse previously-written data.</p>
+
+<p>The files included represent persisted checkpoints that exercise different
+features of thermos. The existing files should not be modified unless
+we are accepting backwards incompatibility, such as with a major release.</p>
+
+<p>It is not practical to write source code to generate these files on the fly,
+as source would be vulnerable to drift (e.g. due to refactoring) in ways
+that would undermine the goal of ensuring backwards compatibility.</p>
+
+<p>The most common reason to add a new checkpoint file would be to provide
+coverage for new thermos features that alter the data format. This is
+accomplished by writing and running a
+<a href="../../reference/configuration/">job configuration</a> that exercises the feature, and
+copying the checkpoint file from the sandbox directory, by default this is
+<code>/var/run/thermos/checkpoints/&lt;aurora task id&gt;</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">Copyright 2014 <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/0.14.0/development/thrift/index.html (added)
+++ aurora/site/publish/documentation/0.14.0/development/thrift/index.html Tue Jun 14 21:35:25 2016
@@ -0,0 +1,172 @@
+<!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 + '/development/thrift/'"
+        value="0.14.0">
+  <option value="0.14.0"
+    selected="selected">
+    0.14.0
+      (latest)
+  </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="thrift">Thrift</h1>
+
+<p>Aurora uses <a href="https://thrift.apache.org/">Apache Thrift</a> for representing structured data in
+client/server RPC protocol as well as for internal data storage. While Thrift is capable of
+correctly handling additions and renames of the existing members, field removals must be done
+carefully to ensure backwards compatibility and provide predictable deprecation cycle. This
+document describes general guidelines for making Thrift schema changes to the existing fields in
+<a href="https://github.com/apache/aurora/blob/rel/0.14.0/api/src/main/thrift/org/apache/aurora/gen/api.thrift">api.thrift</a>.</p>
+
+<p>It is highly recommended to go through the
+<a href="http://diwakergupta.github.io/thrift-missing-guide/">Thrift: The Missing Guide</a> first to refresh on
+basic Thrift schema concepts.</p>
+
+<h2 id="checklist">Checklist</h2>
+
+<p>Every existing Thrift schema modification is unique in its requirements and must be analyzed
+carefully to identify its scope and expected consequences. The following checklist may help in that
+analysis:
+* Is this a new field/struct? If yes, go ahead
+* Is this a pure field/struct rename without any type/structure change? If yes, go ahead and rename
+* Anything else, read further to make sure your change is properly planned</p>
+
+<h2 id="deprecation-cycle">Deprecation cycle</h2>
+
+<p>Any time a breaking change (e.g.: field replacement or removal) is required, the following cycle
+must be followed:</p>
+
+<h3 id="vcurrent">vCurrent</h3>
+
+<p>Change is applied in a way that does not break scheduler/client with this version to
+communicate with scheduler/client from vCurrent-1.
+* Do not remove or rename the old field
+* Add a new field as an eventual replacement of the old one and implement a dual read/write
+anywhere the old field is used. If a thrift struct is mapped in the DB store make sure both columns
+are marked as <code>NOT NULL</code>
+* Check <a href="https://github.com/apache/aurora/blob/rel/0.14.0/api/src/main/thrift/org/apache/aurora/gen/storage.thrift">storage.thrift</a> to see if
+the affected struct is stored in Aurora scheduler storage. If so, it&rsquo;s almost certainly also
+necessary to perform a <a href="../db-migration/">DB migration</a>.
+* Add a deprecation jira ticket into the vCurrent+1 release candidate
+* Add a TODO for the deprecated field mentioning the jira ticket</p>
+
+<h3 id="vcurrent-1">vCurrent+1</h3>
+
+<p>Finalize the change by removing the deprecated fields from the Thrift schema.
+* Drop any dual read/write routines added in the previous version
+* Remove thrift backfilling in scheduler
+* Remove the deprecated Thrift field</p>
+
+<h2 id="testing">Testing</h2>
+
+<p>It&rsquo;s always advisable to test your changes in the local vagrant environment to build more
+confidence that you change is backwards compatible. It&rsquo;s easy to simulate different
+client/scheduler versions by playing with <code>aurorabuild</code> command. See <a href="../../getting-started/vagrant/">this document</a>
+for more.</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">Copyright 2014 <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/0.14.0/development/ui/index.html (added)
+++ aurora/site/publish/documentation/0.14.0/development/ui/index.html Tue Jun 14 21:35:25 2016
@@ -0,0 +1,162 @@
+<!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 + '/development/ui/'"
+        value="0.14.0">
+  <option value="0.14.0"
+    selected="selected">
+    0.14.0
+      (latest)
+  </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="developing-the-aurora-scheduler-ui">Developing the Aurora Scheduler UI</h1>
+
+<h2 id="installing-bower-optional">Installing bower (optional)</h2>
+
+<p>Third party JS libraries used in Aurora (located at 3rdparty/javascript/bower_components) are
+managed by bower, a JS dependency manager. Bower is only required if you plan to add, remove or
+update JS libraries. Bower can be installed using the following command:</p>
+<pre class="highlight plaintext"><code>npm install -g bower
+</code></pre>
+
+<p>Bower depends on node.js and npm. The easiest way to install node on a mac is via brew:</p>
+<pre class="highlight plaintext"><code>brew install node
+</code></pre>
+
+<p>For more node.js installation options refer to <a href="https://github.com/joyent/node/wiki/Installation">https://github.com/joyent/node/wiki/Installation</a>.</p>
+
+<p>More info on installing and using bower can be found at: <a href="http://bower.io/">http://bower.io/</a>. Once installed, you can
+use the following commands to view and modify the bower repo at
+3rdparty/javascript/bower_components</p>
+<pre class="highlight plaintext"><code>bower list
+bower install &lt;library name&gt;
+bower remove &lt;library name&gt;
+bower update &lt;library name&gt;
+bower help
+</code></pre>
+
+<h2 id="faster-iteration-in-vagrant">Faster Iteration in Vagrant</h2>
+
+<p>The scheduler serves UI assets from the classpath. For production deployments this means the assets
+are served from within a jar. However, for faster development iteration, the vagrant image is
+configured to add the <code>scheduler</code> subtree of <code>/vagrant/dist/resources/main</code> to the head of
+<code>CLASSPATH</code>. This path is configured as a shared filesystem to the path on the host system where
+your Aurora repository lives. This means that any updates under <code>dist/resources/main/scheduler</code> in
+your checkout will be reflected immediately in the UI served from within the vagrant image.</p>
+
+<p>The one caveat to this is that this path is under <code>dist</code> not <code>src</code>. This is because the assets must
+be processed by gradle before they can be served. So, unfortunately, you cannot just save your local
+changes and see them reflected in the UI, you must first run <code>./gradlew processResources</code>. This is
+less than ideal, but better than having to restart the scheduler after every change. Additionally,
+gradle makes this process somewhat easier with the use of the <code>--continuous</code> flag. If you run:
+<code>./gradlew processResources --continuous</code> gradle will monitor the filesystem for changes and run the
+task automatically as necessary. This doesn&rsquo;t quite provide hot-reload capabilities, but it does
+allow for &lt;5s from save to changes being visibile in the UI with no further action required on the
+part of the developer.</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">Copyright 2014 <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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@@ -0,0 +1,232 @@
+<!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/constraints/'"
+        value="0.14.0">
+  <option value="0.14.0"
+    selected="selected">
+    0.14.0
+      (latest)
+  </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="scheduling-constraints">Scheduling Constraints</h1>
+
+<p>By default, Aurora will pick any random agent with sufficient resources
+in order to schedule a task. This scheduling choice can be further
+restricted with the help of constraints.</p>
+
+<h2 id="mesos-attributes">Mesos Attributes</h2>
+
+<p>Data centers are often organized with hierarchical failure domains.  Common failure domains
+include hosts, racks, rows, and PDUs.  If you have this information available, it is wise to tag
+the Mesos agent with them as
+<a href="https://mesos.apache.org/documentation/attributes-resources/">attributes</a>.</p>
+
+<p>The Mesos agent <code>--attributes</code> command line argument can be used to mark agents with
+static key/value pairs, so called attributes (not to be confused with <code>--resources</code>, which are
+dynamic and accounted).</p>
+
+<p>For example, consider the host <code>cluster1-aaa-03-sr2</code> and its following attributes (given in
+key:value format): <code>host:cluster1-aaa-03-sr2</code> and <code>rack:aaa</code>.</p>
+
+<p>Aurora makes these attributes available for matching with scheduling constraints.</p>
+
+<h2 id="limit-constraints">Limit Constraints</h2>
+
+<p>Limit constraints allow to control machine diversity using constraints. The below
+constraint ensures that no more than two instances of your job may run on a single host.
+Think of this as a &ldquo;group by&rdquo; limit.</p>
+<pre class="highlight plaintext"><code>Service(
+  name = 'webservice',
+  role = 'www-data',
+  constraints = {
+    'host': 'limit:2',
+  }
+  ...
+)
+</code></pre>
+
+<p>Likewise, you can use constraints to control rack diversity, e.g. at
+most one task per rack:</p>
+<pre class="highlight plaintext"><code>constraints = {
+  'rack': 'limit:1',
+}
+</code></pre>
+
+<p>Use these constraints sparingly as they can dramatically reduce Tasks&rsquo; schedulability.
+Further details are available in the reference documentation on
+<a href="../../reference/configuration/#specifying-scheduling-constraints">Scheduling Constraints</a>.</p>
+
+<h2 id="value-constraints">Value Constraints</h2>
+
+<p>Value constraints can be used to express that a certain attribute with a certain value
+should be present on a Mesos agent. For example, the following job would only be
+scheduled on nodes that claim to have an <code>SSD</code> as their disk.</p>
+<pre class="highlight plaintext"><code>Service(
+  name = 'webservice',
+  role = 'www-data',
+  constraints = {
+    'disk': 'SSD',
+  }
+  ...
+)
+</code></pre>
+
+<p>Further details are available in the reference documentation on
+<a href="../../reference/configuration/#specifying-scheduling-constraints">Scheduling Constraints</a>.</p>
+
+<h2 id="running-stateful-services">Running stateful services</h2>
+
+<p>Aurora is best suited to run stateless applications, but it also accommodates for stateful services
+like databases, or services that otherwise need to always run on the same machines.</p>
+
+<h3 id="dedicated-attribute">Dedicated attribute</h3>
+
+<p>Most of the Mesos attributes arbitrary and available for custom use.  There is one exception,
+though: the <code>dedicated</code> attribute.  Aurora treats this specially, and only allows matching jobs to
+run on these machines, and will only schedule matching jobs on these machines.</p>
+
+<h4 id="syntax">Syntax</h4>
+
+<p>The dedicated attribute has semantic meaning. The format is <code>$role(/.*)?</code>. When a job is created,
+the scheduler requires that the <code>$role</code> component matches the <code>role</code> field in the job
+configuration, and will reject the job creation otherwise.  The remainder of the attribute is
+free-form. We&rsquo;ve developed the idiom of formatting this attribute as <code>$role/$job</code>, but do not
+enforce this. For example: a job <code>devcluster/www-data/prod/hello</code> with a dedicated constraint set as
+<code>www-data/web.multi</code> will have its tasks scheduled only on Mesos agents configured with:
+<code>--attributes=dedicated:www-data/web.multi</code>.</p>
+
+<p>A wildcard (<code>*</code>) may be used for the role portion of the dedicated attribute, which will allow any
+owner to elect for a job to run on the host(s). For example: tasks from both
+<code>devcluster/www-data/prod/hello</code> and <code>devcluster/vagrant/test/hello</code> with a dedicated constraint
+formatted as <code>*/web.multi</code> will be scheduled only on Mesos agents configured with
+<code>--attributes=dedicated:*/web.multi</code>. This may be useful when assembling a virtual cluster of
+machines sharing the same set of traits or requirements.</p>
+
+<h5 id="example">Example</h5>
+
+<p>Consider the following agent command line:</p>
+<pre class="highlight plaintext"><code>mesos-slave --attributes="dedicated:db_team/redis" ...
+</code></pre>
+
+<p>And this job configuration:</p>
+<pre class="highlight plaintext"><code>Service(
+  name = 'redis',
+  role = 'db_team',
+  constraints = {
+    'dedicated': 'db_team/redis'
+  }
+  ...
+)
+</code></pre>
+
+<p>The job configuration is indicating that it should only be scheduled on agents with the attribute
+<code>dedicated:db_team/redis</code>.  Additionally, Aurora will prevent any tasks that do <em>not</em> have that
+constraint from running on those agents.</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">Copyright 2014 <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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@@ -0,0 +1,171 @@
+<!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/containers/'"
+        value="0.14.0">
+  <option value="0.14.0"
+    selected="selected">
+    0.14.0
+      (latest)
+  </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="containers">Containers</h1>
+
+<h2 id="docker">Docker</h2>
+
+<p>Aurora has optional support for launching Docker containers, if correctly <a href="../../operations/configuration/#docker-containers">configured by an Operator</a>.</p>
+
+<p>Example (available in the <a href="../../getting-started/vagrant/">Vagrant environment</a>):</p>
+<pre class="highlight plaintext"><code>$ cat /vagrant/examples/jobs/docker/hello_docker.aurora
+hello_world_proc = Process(
+  name = 'hello',
+  cmdline = """
+    while true; do
+      echo hello world
+      sleep 10
+    done
+  """)
+
+hello_world_docker = Task(
+  name = 'hello docker',
+  processes = [hello_world_proc],
+  resources = Resources(cpu = 1, ram = 1*MB, disk=8*MB)
+)
+
+jobs = [
+  Service(
+    cluster = 'devcluster',
+    environment = 'devel',
+    role = 'docker-test',
+    name = 'hello_docker',
+    task = hello_world_docker,
+    container = Container(docker = Docker(image = 'python:2.7'))
+  )
+]
+</code></pre>
+
+<p>In order to correctly execute processes inside a job, the docker container must have Python 2.7
+installed. Further details of how to use Docker can be found in the
+<a href="../../reference/configuration/#docker-object">Reference Documentation</a>.</p>
+
+<h2 id="mesos">Mesos</h2>
+
+<p><em>Note: In order to use filesystem images with Aurora, you must be running at least Mesos 0.28.x</em></p>
+
+<p>Aurora supports specifying a task filesystem image to use with the <a href="http://mesos.apache.org/documentation/latest/container-image/">Mesos containerizer</a>.
+This is done by setting the <code>container</code> property of the Job to a <code>Mesos</code> container object
+that includes the image to use. Both <a href="https://github.com/appc/spec/blob/master/SPEC.md">AppC</a> and 
+<a href="https://github.com/docker/docker/blob/master/image/spec/v1.md">Docker</a> images are supported.</p>
+<pre class="highlight plaintext"><code>job = Job(
+   ...
+   container = Mesos(image=DockerImage(name='my-image', tag='my-tag'))
+   ...
+)
+</code></pre>
+
+</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">Copyright 2014 <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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+<!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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+    <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/cron-jobs/'"
+        value="0.14.0">
+  <option value="0.14.0"
+    selected="selected">
+    0.14.0
+      (latest)
+  </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="cron-jobs">Cron Jobs</h1>
+
+<p>Aurora supports execution of scheduled jobs on a Mesos cluster using cron-style syntax.</p>
+
+<ul>
+<li><a href="#overview">Overview</a></li>
+<li><a href="#collision-policies">Collision Policies</a></li>
+<li><a href="#failure-recovery">Failure recovery</a></li>
+<li><a href="#interacting-with-cron-jobs-via-the-aurora-cli">Interacting with cron jobs via the Aurora CLI</a>
+
+<ul>
+<li><a href="#cron-schedule">cron schedule</a></li>
+<li><a href="#cron-deschedule">cron deschedule</a></li>
+<li><a href="#cron-start">cron start</a></li>
+<li><a href="#job-killall-job-restart-job-kill">job killall, job restart, job kill</a></li>
+</ul></li>
+<li><a href="#technical-note-about-syntax">Technical Note About Syntax</a></li>
+<li><a href="#caveats">Caveats</a>
+
+<ul>
+<li><a href="#failovers">Failovers</a></li>
+<li><a href="#collision-policy-is-best-effort">Collision policy is best-effort</a></li>
+<li><a href="#timezone-configuration">Timezone Configuration</a></li>
+</ul></li>
+</ul>
+
+<h2 id="overview">Overview</h2>
+
+<p>A job is identified as a cron job by the presence of a
+<code>cron_schedule</code> attribute containing a cron-style schedule in the
+<a href="../../reference/configuration/#job-objects"><code>Job</code></a> object. Examples of cron schedules
+include &ldquo;every 5 minutes&rdquo; (<code>*/5 * * * *</code>), &ldquo;Fridays at 17:00&rdquo; (<code>* 17 * * FRI</code>), and
+&ldquo;the 1st and 15th day of the month at 03:00&rdquo; (<code>0 3 1,15 *</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/cron_hello_world.aurora
+# A cron job that runs every 5 minutes.
+jobs = [
+  Job(
+    cluster = 'devcluster',
+    role = 'www-data',
+    environment = 'test',
+    name = 'cron_hello_world',
+    cron_schedule = '*/5 * * * *',
+    task = SimpleTask(
+      'cron_hello_world',
+      'echo "Hello world from cron, the time is now $(date --rfc-822)"'),
+  ),
+]
+</code></pre>
+
+<h2 id="collision-policies">Collision Policies</h2>
+
+<p>The <code>cron_collision_policy</code> field specifies the scheduler&rsquo;s behavior when a new cron job is
+triggered while an older run hasn&rsquo;t finished. The scheduler has two policies available:</p>
+
+<ul>
+<li><code>KILL_EXISTING</code>: The default policy - on a collision the old instances are killed and a instances with the current
+configuration are started.</li>
+<li><code>CANCEL_NEW</code>: On a collision the new run is cancelled.</li>
+</ul>
+
+<p>Note that the use of <code>CANCEL_NEW</code> is likely a code smell - interrupted cron jobs should be able
+to recover their progress on a subsequent invocation, otherwise they risk having their work queue
+grow faster than they can process it.</p>
+
+<h2 id="failure-recovery">Failure recovery</h2>
+
+<p>Unlike with services, which aurora will always re-execute regardless of exit status, instances of
+cron jobs retry according to the <code>max_task_failures</code> attribute of the
+<a href="../../reference/configuration/#task-object">Task</a> object. To get &ldquo;run-until-success&rdquo; semantics,
+set <code>max_task_failures</code> to <code>-1</code>.</p>
+
+<h2 id="interacting-with-cron-jobs-via-the-aurora-cli">Interacting with cron jobs via the Aurora CLI</h2>
+
+<p>Most interaction with cron jobs takes place using the <code>cron</code> subcommand. See <code>aurora cron -h</code>
+for up-to-date usage instructions.</p>
+
+<h3 id="cron-schedule">cron schedule</h3>
+
+<p>Schedules a new cron job on the Aurora cluster for later runs or replaces the existing cron template
+with a new one. Only future runs will be affected, any existing active tasks are left intact.</p>
+<pre class="highlight plaintext"><code>$ aurora cron schedule devcluster/www-data/test/cron_hello_world /vagrant/examples/jobs/cron_hello_world.aurora
+</code></pre>
+
+<h3 id="cron-deschedule">cron deschedule</h3>
+
+<p>Deschedules a cron job, preventing future runs but allowing current runs to complete.</p>
+<pre class="highlight plaintext"><code>$ aurora cron deschedule devcluster/www-data/test/cron_hello_world
+</code></pre>
+
+<h3 id="cron-start">cron start</h3>
+
+<p>Start a cron job immediately, outside of its normal cron schedule.</p>
+<pre class="highlight plaintext"><code>$ aurora cron start devcluster/www-data/test/cron_hello_world
+</code></pre>
+
+<h3 id="job-killall-job-restart-job-kill">job killall, job restart, job kill</h3>
+
+<p>Cron jobs create instances running on the cluster that you can interact with like normal Aurora
+tasks with <code>job kill</code> and <code>job restart</code>.</p>
+
+<h2 id="technical-note-about-syntax">Technical Note About Syntax</h2>
+
+<p><code>cron_schedule</code> uses a restricted subset of BSD crontab syntax. While the
+execution engine currently uses Quartz, the schedule parsing is custom, a subset of FreeBSD
+<a href="http://www.freebsd.org/cgi/man.cgi?crontab(5)">crontab(5)</a> syntax. See
+<a href="https://github.com/apache/aurora/blob/master/src/main/java/org/apache/aurora/scheduler/cron/CrontabEntry.java#L106-L124">the source</a>
+for details.</p>
+
+<h2 id="caveats">Caveats</h2>
+
+<h3 id="failovers">Failovers</h3>
+
+<p>No failover recovery. Aurora does not record the latest minute it fired
+triggers for across failovers. Therefore it&rsquo;s possible to miss triggers
+on failover. Note that this behavior may change in the future.</p>
+
+<p>It&rsquo;s necessary to sync time between schedulers with something like <code>ntpd</code>.
+Clock skew could cause double or missed triggers in the case of a failover.</p>
+
+<h3 id="collision-policy-is-best-effort">Collision policy is best-effort</h3>
+
+<p>Aurora aims to always have <em>at least one copy</em> of a given instance running at a time - it&rsquo;s
+an AP system, meaning it chooses Availability and Partition Tolerance at the expense of
+Consistency.</p>
+
+<p>If your collision policy was <code>CANCEL_NEW</code> and a task has terminated but
+Aurora has not noticed this Aurora will go ahead and create your new
+task.</p>
+
+<p>If your collision policy was <code>KILL_EXISTING</code> and a task was marked <code>LOST</code>
+but not yet GCed Aurora will go ahead and create your new task without
+attempting to kill the old one (outside the GC interval).</p>
+
+<h3 id="timezone-configuration">Timezone Configuration</h3>
+
+<p>Cron timezone is configured indepdendently of JVM timezone with the <code>-cron_timezone</code> flag and
+defaults to UTC.</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">Copyright 2014 <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/0.14.0/features/job-updates/index.html (added)
+++ aurora/site/publish/documentation/0.14.0/features/job-updates/index.html Tue Jun 14 21:35:25 2016
@@ -0,0 +1,224 @@
+<!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']);
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+		  (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="0.14.0">
+  <option value="0.14.0"
+    selected="selected">
+    0.14.0
+      (latest)
+  </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 &lt;job key&gt; &lt;configuration file&gt;
+aurora update info &lt;job key&gt;
+aurora update pause &lt;job key&gt;
+aurora update resume &lt;job key&gt;
+aurora update abort &lt;job key&gt;
+aurora update list &lt;cluster&gt;
+</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 Client 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:</p>
+
+<ul>
+<li>If an instance is present in the scheduler but isn&rsquo;t in the new config,
+then that instance is killed.</li>
+<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 client 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>
+</ul>
+
+<p>The Aurora client continues through the instance list until all tasks are
+updated, in <code>RUNNING,</code> and healthy for a configurable amount of time.
+If the client determines the update is not going well (a percentage of health
+checks have failed), 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 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 (&ldquo;heartbeating&rdquo;) 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/0.14.0/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 &lt;job_key_value&gt;/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&rsquo;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">Copyright 2014 <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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+<!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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+  <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="0.14.0">
+  <option value="0.14.0"
+    selected="selected">
+    0.14.0
+      (latest)
+  </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>&lt;cluster&gt;/&lt;role&gt;/&lt;environment&gt;/&lt;jobname&gt;</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&rsquo;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
+&ldquo;environment&rdquo; 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="preemption">Preemption</h2>
+
+<p>In order to guarantee that important production jobs are always running, Aurora supports
+preemption.</p>
+
+<p>Let&rsquo;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 non-<a href="../../reference/configuration/#job-objects">production</a> and the candidate is
+<a href="../../reference/configuration/#job-objects">production</a>.</li>
+</ul>
+
+<p>In other words, tasks from <a href="../../reference/configuration/#job-objects">production</a> jobs may preempt
+tasks from any non-production job. However, a production task may only be preempted by tasks from
+production 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">Copyright 2014 <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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