content/blog/aurora-0-16-0-released/index.html - aurora-website - Git at Google

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 			  <p><strong>Joshua Cohen</strong></p>
 			    <p><a href="http://twitter.com/heyjoshua">@heyjoshua</a></p>
 			</span>
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 		<p><em>Posted September 28, 2016</em></p>
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 <div class="post col-md-9">
 	<h1>0.16.0 Released</h1>

 	<p>The latest Apache Aurora release, 0.16.0, is now available for
 <a href="http://aurora.apache.org/downloads/">download</a>. Here are some highlights in this release:</p>

 <ul>
 <li>Upgraded Mesos to 1.0.0. Note: as part of this upgrade we have switched from depending on
 the mesos.native egg for Thermos in favor of the stripped down mesos.executor egg. This means
 users launching Docker tasks with the Mesos DockerContainerizer are no longer required to use
 images that include all of Mesos&rsquo;s dependencies.</li>
 <li>Scheduler command line behavior has been modified to warn users of the deprecation of <code>production</code>
 attribute in <code>Job</code> thrift struct. The scheduler is queried for tier configurations and the user&rsquo;s
 choice of <code>tier</code> and <code>production</code> attributes is revised, if necessary. If <code>tier</code> is already set,
 the <code>production</code> attribute might be adjusted to match the <code>tier</code> selection. Otherwise, <code>tier</code> is
 selected based on the value of <code>production</code> attribute. If a matching tier is not found, the
 <code>default</code> tier from tier configuration file (<code>tiers.json</code>) is used.</li>
 <li>The <code>/offers</code> endpoint has been modified to display attributes of resource offers as received
 from Mesos. This has affected rendering of some of the existing attributes. Furthermore, it now
 dumps additional offer attributes including <a href="http://mesos.apache.org/documentation/latest/reservation/">reservations</a>
 and <a href="http://mesos.apache.org/documentation/latest/persistent-volume/">persistent volumes</a>.</li>
 <li>The scheduler API now accepts both thrift JSON and binary thrift. If a request is sent without a
 <code>Content-Type</code> header, or a <code>Content-Type</code> header of <code>application/x-thrift</code> or <code>application/json</code>
 or <code>application/vnd.apache.thrift.json</code> the request is treated as thrift JSON. If a request is
 sent with a <code>Content-Type</code> header of <code>application/vnd.apache.thrift.binary</code> the request is treated
 as binary thrift. If the <code>Accept</code> header of the request is <code>application/vnd.apache.thrift.binary</code>
 then the response will be binary thrift. Any other value for <code>Accept</code> will result in thrift JSON.</li>
 <li>Scheduler is now able to launch jobs using more than one executor at a time. To use this feature
 the <code>-custom_executor_config</code> flag must point to a JSON file which contains at least one valid
 executor configuration as detailed in the <a href="docs/features/custom-executors.md">configuration</a>
 documentation.</li>
 <li>Add rollback API to the scheduler and new client command to support rolling back
 active update jobs to their initial state.</li>
 <li><a name="zk_use_curator_upgrade"></a> The scheduler flag <code>-zk_use_curator</code> now defaults to <code>true</code>
 and care should be taken when upgrading from a configuration that does not pass the flag. The
 scheduler upgrade should be performed by bringing all schedulers down, and then bringing upgraded
 schedulers up. A rolling upgrade would result in no leading scheduler for the duration of the
 roll which could be confusing to monitor and debug.</li>
 <li>A new command <code>aurora_admin reconcile_tasks</code> is now available on the Aurora admin client that can trigger
 implicit and explicit task reconciliations.</li>
 <li>Add a new MTTS (Median Time To Starting) metric in addition to MTTA and MTTR.</li>
 <li>In addition to CPU resources, RAM resources can now be treated as revocable via the scheduler
 commandline flag <code>-enable_revocable_ram</code>.</li>
 <li>Introduce UpdateMetadata fields in JobUpdateRequest to allow clients to store metadata on update.</li>
 <li>Changed cronSchedule field inside of JobConfiguration schema to be optional for compatibility with Go.</li>
 <li>Update default value of command line option <code>-framework_name</code> to &lsquo;Aurora&rsquo;.</li>
 <li>Tasks launched with filesystem images and the Mesos unified containerizer are now fully isolated from
 the host&rsquo;s filesystem. As such they are no longer required to include any of the executor&rsquo;s
 dependencies (e.g. Python 2.7) within the task&rsquo;s filesystem.</li>
 </ul>

 <p>Deprecations and removals:</p>

 <ul>
 <li>The job configuration flag <code>production</code> is now deprecated. To achieve the same scheduling behavior
 that <code>production=true</code> used to provide, users should elect a <code>tier</code> for the job with attributes
 <code>preemptible=false</code> and <code>revocable=false</code>. For example, the <code>preferred</code> tier in the default tier
 configuration file (<code>tiers.json</code>) matches the above criteria.</li>
 <li>The <code>ExecutorInfo.source</code> field is deprecated and has been replaced with a label named <code>source</code>.
 It will be removed from Mesos in a future release.</li>
 <li>The scheduler flag <code>-zk_use_curator</code> has been deprecated. If you have never set the flag and are
 upgrading you should take care as described in the <a href="#zk_use_curator_upgrade">note</a> above.</li>
 <li>The <code>key</code> argument of <code>getJobUpdateDetails</code> has been deprecated. Use the <code>query</code> argument instead.</li>
 <li>The &ndash;release-threshold option on <code>aurora job restart</code> has been removed.</li>
 </ul>

 <p>Full release notes are available in the release
 <a href="https://gitbox.apache.org/repos/asf?p=aurora.git&amp;f=CHANGELOG&amp;hb=rel/0.16.0">CHANGELOG</a>.</p>

 <h2 id="getting-involved">Getting Involved</h2>

 <p>We encourage you to try out this release and let us know what you think. If you run into any issues,
 please let us know on the <a href="https://aurora.apache.org/community/">user mailing list and IRC</a>.</p>

 <h2 id="thanks">Thanks</h2>

 <p>Thanks to the 16 contributors who made Apache Aurora 0.16.0 possible:</p>

 <ul>
 <li>David McLaughlin</li>
 <li>David Robinson</li>
 <li>Dmitriy Shirchenko</li>
 <li>Igor Morozov</li>
 <li>John Sirois</li>
 <li>Joshua Cohen</li>
 <li>Kai Huang</li>
 <li>Karthik Anantha Padmanabhan</li>
 <li>Maxim Khutornenko</li>
 <li>Mehrdad Nurolahzade</li>
 <li>Renan DelValle</li>
 <li>Santhosh Kumar Shanmugham</li>
 <li>Stephan Erb</li>
 <li>Tarun Gogineni</li>
 <li>Zameer Manji</li>
 <li>Zhitao Li</li>
 </ul>

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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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	<p><strong>Joshua Cohen</strong></p>
	<p><a href="http://twitter.com/heyjoshua">@heyjoshua</a></p>
	</span>
	</span>
	<p><em>Posted September 28, 2016</em></p>
	</div>

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	<div class="post col-md-9">
	<h1>0.16.0 Released</h1>

	<p>The latest Apache Aurora release, 0.16.0, is now available for
	<a href="http://aurora.apache.org/downloads/">download</a>. Here are some highlights in this release:</p>

	<ul>
	<li>Upgraded Mesos to 1.0.0. Note: as part of this upgrade we have switched from depending on
	the mesos.native egg for Thermos in favor of the stripped down mesos.executor egg. This means
	users launching Docker tasks with the Mesos DockerContainerizer are no longer required to use
	images that include all of Mesos’s dependencies.</li>
	<li>Scheduler command line behavior has been modified to warn users of the deprecation of <code>production</code>
	attribute in <code>Job</code> thrift struct. The scheduler is queried for tier configurations and the user’s
	choice of <code>tier</code> and <code>production</code> attributes is revised, if necessary. If <code>tier</code> is already set,
	the <code>production</code> attribute might be adjusted to match the <code>tier</code> selection. Otherwise, <code>tier</code> is
	selected based on the value of <code>production</code> attribute. If a matching tier is not found, the
	<code>default</code> tier from tier configuration file (<code>tiers.json</code>) is used.</li>
	<li>The <code>/offers</code> endpoint has been modified to display attributes of resource offers as received
	from Mesos. This has affected rendering of some of the existing attributes. Furthermore, it now
	dumps additional offer attributes including <a href="http://mesos.apache.org/documentation/latest/reservation/">reservations</a>
	and <a href="http://mesos.apache.org/documentation/latest/persistent-volume/">persistent volumes</a>.</li>
	<li>The scheduler API now accepts both thrift JSON and binary thrift. If a request is sent without a
	<code>Content-Type</code> header, or a <code>Content-Type</code> header of <code>application/x-thrift</code> or <code>application/json</code>
	or <code>application/vnd.apache.thrift.json</code> the request is treated as thrift JSON. If a request is
	sent with a <code>Content-Type</code> header of <code>application/vnd.apache.thrift.binary</code> the request is treated
	as binary thrift. If the <code>Accept</code> header of the request is <code>application/vnd.apache.thrift.binary</code>
	then the response will be binary thrift. Any other value for <code>Accept</code> will result in thrift JSON.</li>
	<li>Scheduler is now able to launch jobs using more than one executor at a time. To use this feature
	the <code>-custom_executor_config</code> flag must point to a JSON file which contains at least one valid
	executor configuration as detailed in the <a href="docs/features/custom-executors.md">configuration</a>
	documentation.</li>
	<li>Add rollback API to the scheduler and new client command to support rolling back
	active update jobs to their initial state.</li>
	<li><a name="zk_use_curator_upgrade"></a> The scheduler flag <code>-zk_use_curator</code> now defaults to <code>true</code>
	and care should be taken when upgrading from a configuration that does not pass the flag. The
	scheduler upgrade should be performed by bringing all schedulers down, and then bringing upgraded
	schedulers up. A rolling upgrade would result in no leading scheduler for the duration of the
	roll which could be confusing to monitor and debug.</li>
	<li>A new command <code>aurora_admin reconcile_tasks</code> is now available on the Aurora admin client that can trigger
	implicit and explicit task reconciliations.</li>
	<li>Add a new MTTS (Median Time To Starting) metric in addition to MTTA and MTTR.</li>
	<li>In addition to CPU resources, RAM resources can now be treated as revocable via the scheduler
	commandline flag <code>-enable_revocable_ram</code>.</li>
	<li>Introduce UpdateMetadata fields in JobUpdateRequest to allow clients to store metadata on update.</li>
	<li>Changed cronSchedule field inside of JobConfiguration schema to be optional for compatibility with Go.</li>
	<li>Update default value of command line option <code>-framework_name</code> to ‘Aurora’.</li>
	<li>Tasks launched with filesystem images and the Mesos unified containerizer are now fully isolated from
	the host’s filesystem. As such they are no longer required to include any of the executor’s
	dependencies (e.g. Python 2.7) within the task’s filesystem.</li>
	</ul>

	<p>Deprecations and removals:</p>

	<ul>
	<li>The job configuration flag <code>production</code> is now deprecated. To achieve the same scheduling behavior
	that <code>production=true</code> used to provide, users should elect a <code>tier</code> for the job with attributes
	<code>preemptible=false</code> and <code>revocable=false</code>. For example, the <code>preferred</code> tier in the default tier
	configuration file (<code>tiers.json</code>) matches the above criteria.</li>
	<li>The <code>ExecutorInfo.source</code> field is deprecated and has been replaced with a label named <code>source</code>.
	It will be removed from Mesos in a future release.</li>
	<li>The scheduler flag <code>-zk_use_curator</code> has been deprecated. If you have never set the flag and are
	upgrading you should take care as described in the <a href="#zk_use_curator_upgrade">note</a> above.</li>
	<li>The <code>key</code> argument of <code>getJobUpdateDetails</code> has been deprecated. Use the <code>query</code> argument instead.</li>
	<li>The –release-threshold option on <code>aurora job restart</code> has been removed.</li>
	</ul>

	<p>Full release notes are available in the release
	<a href="https://gitbox.apache.org/repos/asf?p=aurora.git&f=CHANGELOG&hb=rel/0.16.0">CHANGELOG</a>.</p>

	<h2 id="getting-involved">Getting Involved</h2>

	<p>We encourage you to try out this release and let us know what you think. If you run into any issues,
	please let us know on the <a href="https://aurora.apache.org/community/">user mailing list and IRC</a>.</p>

	<h2 id="thanks">Thanks</h2>

	<p>Thanks to the 16 contributors who made Apache Aurora 0.16.0 possible:</p>

	<ul>
	<li>David McLaughlin</li>
	<li>David Robinson</li>
	<li>Dmitriy Shirchenko</li>
	<li>Igor Morozov</li>
	<li>John Sirois</li>
	<li>Joshua Cohen</li>
	<li>Kai Huang</li>
	<li>Karthik Anantha Padmanabhan</li>
	<li>Maxim Khutornenko</li>
	<li>Mehrdad Nurolahzade</li>
	<li>Renan DelValle</li>
	<li>Santhosh Kumar Shanmugham</li>
	<li>Stephan Erb</li>
	<li>Tarun Gogineni</li>
	<li>Zameer Manji</li>
	<li>Zhitao Li</li>
	</ul>

	</div>
	</div>

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	<li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
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	<li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
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	<p class="disclaimer">© 2014-2017 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
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