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<h5>MapReduce</h5>
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<a href="../../../hadoop-mapreduce-client/hadoop-mapreduce-client-core/MapReduceTutorial.html">Tutorial</a>
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<a href="../../../hadoop-mapreduce-client/hadoop-mapreduce-client-core/EncryptedShuffle.html">Encrypted Shuffle</a>
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<h5>MapReduce REST APIs</h5>
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<ul>
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<a href="../../../hadoop-mapreduce-client/hadoop-mapreduce-client-core/MapredAppMasterRest.html">MR Application Master</a>
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<ul>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/YARN.html">Architecture</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/YarnCommands.html">Commands Reference</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/FairScheduler.html">Fair Scheduler</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/ResourceManagerRestart.html">ResourceManager Restart</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/ResourceManagerHA.html">ResourceManager HA</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/ResourceModel.html">Resource Model</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/NodeLabel.html">Node Labels</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/NodeAttributes.html">Node Attributes</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/WebApplicationProxy.html">Web Application Proxy</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/TimelineServer.html">Timeline Server</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/TimelineServiceV2.html">Timeline Service V.2</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/WritingYarnApplications.html">Writing YARN Applications</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/YarnApplicationSecurity.html">YARN Application Security</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/NodeManager.html">NodeManager</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/DockerContainers.html">Running Applications in Docker Containers</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/RuncContainers.html">Running Applications in runC Containers</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/NodeManagerCgroups.html">Using CGroups</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/SecureContainer.html">Secure Containers</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/ReservationSystem.html">Reservation System</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/GracefulDecommission.html">Graceful Decommission</a>
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<li class="none">
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<a href="../../../hadoop-yarn/hadoop-yarn-site/OpportunisticContainers.html">Opportunistic Containers</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/Federation.html">YARN Federation</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/SharedCache.html">Shared Cache</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/UsingGpus.html">Using GPU</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/UsingFPGA.html">Using FPGA</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/PlacementConstraints.html">Placement Constraints</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/YarnUI2.html">YARN UI2</a>
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</li>
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</ul>
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<h5>YARN REST APIs</h5>
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<ul>
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<li class="none">
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<a href="../../../hadoop-yarn/hadoop-yarn-site/WebServicesIntro.html">Introduction</a>
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<li class="none">
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<a href="../../../hadoop-yarn/hadoop-yarn-site/ResourceManagerRest.html">Resource Manager</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/NodeManagerRest.html">Node Manager</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/TimelineServer.html#Timeline_Server_REST_API_v1">Timeline Server</a>
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<li class="none">
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<a href="../../../hadoop-yarn/hadoop-yarn-site/TimelineServiceV2.html#Timeline_Service_v.2_REST_API">Timeline Service V.2</a>
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</li>
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</ul>
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<h5>YARN Service</h5>
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<ul>
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<li class="none">
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<a href="../../../hadoop-yarn/hadoop-yarn-site/yarn-service/Overview.html">Overview</a>
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</li>
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<li class="none">
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<a href="../../../hadoop-yarn/hadoop-yarn-site/yarn-service/QuickStart.html">QuickStart</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-site/yarn-service/Concepts.html">Concepts</a>
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<li class="none">
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<a href="../../../hadoop-yarn/hadoop-yarn-site/yarn-service/YarnServiceAPI.html">Yarn Service API</a>
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<li class="none">
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<a href="../../../hadoop-yarn/hadoop-yarn-site/yarn-service/ServiceDiscovery.html">Service Discovery</a>
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<li class="none">
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<a href="../../../hadoop-yarn/hadoop-yarn-site/yarn-service/SystemServices.html">System Services</a>
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</li>
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</ul>
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<h5>Hadoop Compatible File Systems</h5>
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<ul>
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<li class="none">
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<a href="../../../hadoop-aliyun/tools/hadoop-aliyun/index.html">Aliyun OSS</a>
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</li>
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<li class="none">
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<a href="../../../hadoop-aws/tools/hadoop-aws/index.html">Amazon S3</a>
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</li>
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<li class="none">
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<a href="../../../hadoop-azure/index.html">Azure Blob Storage</a>
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</li>
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<a href="../../../hadoop-azure-datalake/index.html">Azure Data Lake Storage</a>
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</li>
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<li class="none">
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<a href="../../../hadoop-cos/cloud-storage/index.html">Tencent COS</a>
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</li>
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<li class="none">
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<a href="../../../hadoop-huaweicloud/cloud-storage/index.html">Huaweicloud OBS</a>
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</li>
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</ul>
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<a href="../../../hadoop-auth/BuildingIt.html">Building</a>
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<h5>Tools</h5>
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<ul>
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<a href="../../../hadoop-streaming/HadoopStreaming.html">Hadoop Streaming</a>
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<a href="../../../hadoop-archives/HadoopArchives.html">Hadoop Archives</a>
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<h5>Reference</h5>
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<ul>
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<a href="../../../hadoop-project-dist/hadoop-common/release/">Changelog and Release Notes</a>
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<a href="../../../hadoop-project-dist/hadoop-common/core-default.xml">core-default.xml</a>
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<a href="../../../hadoop-project-dist/hadoop-hdfs/hdfs-default.xml">hdfs-default.xml</a>
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<a href="../../../hadoop-project-dist/hadoop-hdfs-rbf/hdfs-rbf-default.xml">hdfs-rbf-default.xml</a>
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<a href="../../../hadoop-mapreduce-client/hadoop-mapreduce-client-core/mapred-default.xml">mapred-default.xml</a>
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<a href="../../../hadoop-yarn/hadoop-yarn-common/yarn-default.xml">yarn-default.xml</a>
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<a href="../../../hadoop-kms/kms-default.html">kms-default.xml</a>
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<a href="../../../hadoop-hdfs-httpfs/httpfs-default.html">httpfs-default.xml</a>
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<a href="../../../hadoop-project-dist/hadoop-common/DeprecatedProperties.html">Deprecated Properties</a>
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<!---
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License. See accompanying LICENSE file.
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-->
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<h1>Service Upgrade (Experimental Feature - Tech Preview)</h1>
|
|
<p>Yarn service provides a way of upgrading/downgrading long running applications without shutting down the application to minimize the downtime during this process. This is an experimental feature which is currently not enabled by default.</p><section>
|
|
<h2><a name="Overview"></a>Overview</h2>
|
|
<p>Upgrading a Yarn Service is a 3 steps (or 2 steps when auto-finalization of upgrade is chosen) process:</p>
|
|
<ol style="list-style-type: decimal">
|
|
|
|
<li>
|
|
|
|
<p>Initiate service upgrade.<br />
|
|
This step involves providing the service spec of the newer version of the service. Once, the service upgrade is initiated, the state of the service is changed to <code>UPGRADING</code>.</p>
|
|
</li>
|
|
<li>
|
|
|
|
<p>Upgrade component instances.<br />
|
|
This step involves triggering upgrade of individual component instance. By providing an API to upgrade at instance level, users can orchestrate upgrade of the entire service in any order which is relevant for the service.<br />
|
|
In addition, there are APIs to upgrade multiple instances, all instances of a component, and all instances of multiple components.</p>
|
|
</li>
|
|
<li>
|
|
|
|
<p>Finalize upgrade.<br />
|
|
This step involves finalization of upgrade. With an explicit step to finalize the upgrade, users have a chance to cancel current upgrade in progress. When the user chose to cancel, the service will make the best effort to revert to the previous version.<br />
|
|
<br />
|
|
When the upgrade is finalized, the old service definition is overwritten by the new service definition and the service state changes to <code>STABLE</code>.<br />
|
|
A service can be auto-finalized when the upgrade is initialized with <code>-autoFinalize</code> option. With auto-finalization, when all the component-instances of the service have been upgraded, finalization will be performed automatically by the service framework.\</p>
|
|
</li>
|
|
</ol>
|
|
<p>Hadoop 3.2.0 onwards canceling upgrade and express upgrade is also supported.</p>
|
|
<ol style="list-style-type: decimal">
|
|
|
|
<li>
|
|
|
|
<p>Cancel upgrade.<br />
|
|
Before the upgrade of the service is finalized, the user has an option to cancel the upgrade. This step resolves the dependencies between the components and then sequentially rolls back each component which was upgraded.</p>
|
|
</li>
|
|
<li>
|
|
|
|
<p>Express upgrade.<br />
|
|
This is a one-step process to upgrade all the components of the service. It involves providing the service spec of the newer version of the service. The service master then performs the following steps automatically:<br />
|
|
a. Discovers all the components that require an upgrade.<br />
|
|
b. Resolve dependencies between these components.<br />
|
|
c. Triggers upgrade of the components sequentially.</p>
|
|
</li>
|
|
</ol></section><section>
|
|
<h2><a name="Upgrade_Example"></a>Upgrade Example</h2>
|
|
<p>This example shows upgrade of sleeper service. Below is the sleeper service definition</p>
|
|
|
|
<div class="source">
|
|
<div class="source">
|
|
<pre>{
|
|
"name": "sleeper-service",
|
|
"components" :
|
|
[
|
|
{
|
|
"name": "sleeper",
|
|
"version": "1.0.0",
|
|
"number_of_containers": 1,
|
|
"launch_command": "sleep 900000",
|
|
"resource": {
|
|
"cpus": 1,
|
|
"memory": "256"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
</pre></div></div>
|
|
|
|
<p>Assuming, user launched an instance of sleeper service named as <code>my-sleeper</code>:</p>
|
|
|
|
<div class="source">
|
|
<div class="source">
|
|
<pre>{
|
|
"components":
|
|
[
|
|
{
|
|
"configuration": {...},
|
|
"containers":
|
|
[
|
|
{
|
|
"bare_host": "0.0.0.0",
|
|
"component_instance_name": "sleeper-0",
|
|
"hostname": "example.local",
|
|
"id": "container_1531508836237_0002_01_000002",
|
|
"ip": "0.0.0.0",
|
|
"launch_time": 1531941023675,
|
|
"state": "READY"
|
|
},
|
|
{
|
|
"bare_host": "0.0.0.0",
|
|
"component_instance_name": "sleeper-1",
|
|
"hostname": "example.local",
|
|
"id": "container_1531508836237_0002_01_000003",
|
|
"ip": "0.0.0.0",
|
|
"launch_time": 1531941024680,
|
|
"state": "READY"
|
|
}
|
|
],
|
|
"dependencies": [],
|
|
"launch_command": "sleep 900000",
|
|
"name": "sleeper",
|
|
"number_of_containers": 2,
|
|
"quicklinks": [],
|
|
"resource": {...},
|
|
"restart_policy": "ALWAYS",
|
|
"run_privileged_container": false,
|
|
"state": "STABLE"
|
|
}
|
|
],
|
|
"configuration": {...},
|
|
"id": "application_1531508836237_0002",
|
|
"kerberos_principal": {},
|
|
"lifetime": -1,
|
|
"name": "my-sleeper",
|
|
"quicklinks": {},
|
|
"state": "STABLE",
|
|
"version": "1.0.0"
|
|
}
|
|
</pre></div></div>
|
|
<section>
|
|
<h3><a name="Enable_Service_Upgrade"></a>Enable Service Upgrade</h3>
|
|
<p>Below is the configuration in <code>yarn-site.xml</code> required for enabling service upgrade.</p>
|
|
|
|
<div class="source">
|
|
<div class="source">
|
|
<pre> <property>
|
|
<name>yarn.service.upgrade.enabled</name>
|
|
<value>true</value>
|
|
</property>
|
|
</pre></div></div>
|
|
</section><section>
|
|
<h3><a name="Initiate_Upgrade"></a>Initiate Upgrade</h3>
|
|
<p>User can initiate upgrade using the below command:</p>
|
|
|
|
<div class="source">
|
|
<div class="source">
|
|
<pre>yarn app -upgrade ${service_name} -initate ${path_to_new_service_def_file} [-autoFinalize]
|
|
</pre></div></div>
|
|
|
|
<p>e.g. To upgrade <code>my-sleeper</code> to sleep for <i>1200000</i> instead of <i>900000</i>, the user can upgrade the service to version 1.0.1. Below is the service definition for version 1.0.1 of sleeper-service:</p>
|
|
|
|
<div class="source">
|
|
<div class="source">
|
|
<pre>{
|
|
"components" :
|
|
[
|
|
{
|
|
"name": "sleeper",
|
|
"version": "1.0.1",
|
|
"number_of_containers": 1,
|
|
"launch_command": "sleep 1200000",
|
|
"resource": {
|
|
"cpus": 1,
|
|
"memory": "256"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
</pre></div></div>
|
|
|
|
<p>The command below initiates the upgrade to version 1.0.1.</p>
|
|
|
|
<div class="source">
|
|
<div class="source">
|
|
<pre>yarn app -upgrade my-sleeper -initiate sleeper_v101.json
|
|
</pre></div></div>
|
|
</section><section>
|
|
<h3><a name="Upgrade_Instance"></a>Upgrade Instance</h3>
|
|
<p>User can upgrade a component instance using the below command:</p>
|
|
|
|
<div class="source">
|
|
<div class="source">
|
|
<pre>yarn app -upgrade ${service_name} -instances ${comma_separated_list_of_instance_names}
|
|
</pre></div></div>
|
|
|
|
<p>e.g. The command below upgrades <code>sleeper-0</code> and <code>sleeper-1</code> instances of <code>my-service</code>:</p>
|
|
|
|
<div class="source">
|
|
<div class="source">
|
|
<pre>yarn app -upgrade my-sleeper -instances sleeper-0,sleeper-1
|
|
</pre></div></div>
|
|
</section><section>
|
|
<h3><a name="Upgrade_Component"></a>Upgrade Component</h3>
|
|
<p>User can upgrade a component, that is, all the instances of a component with one command:</p>
|
|
|
|
<div class="source">
|
|
<div class="source">
|
|
<pre>yarn app -upgrade ${service_name} -components ${comma_separated_list_of_component_names}
|
|
</pre></div></div>
|
|
|
|
<p>e.g. The command below upgrades all the instances of <code>sleeper</code> component of <code>my-service</code>:</p>
|
|
|
|
<div class="source">
|
|
<div class="source">
|
|
<pre>yarn app -ugrade my-sleeper -components sleeper
|
|
</pre></div></div>
|
|
</section><section>
|
|
<h3><a name="Finalize_Upgrade"></a>Finalize Upgrade</h3>
|
|
<p>User must finalize the upgrade using the below command (since autoFinalize was not specified during initiate):</p>
|
|
|
|
<div class="source">
|
|
<div class="source">
|
|
<pre>yarn app -upgrade ${service_name} -finalize
|
|
</pre></div></div>
|
|
|
|
<p>e.g. The command below finalizes the upgrade of <code>my-sleeper</code>:</p>
|
|
|
|
<div class="source">
|
|
<div class="source">
|
|
<pre>yarn app -upgrade my-sleeper -finalize
|
|
</pre></div></div>
|
|
</section><section>
|
|
<h3><a name="Cancel_Upgrade"></a>Cancel Upgrade</h3>
|
|
<p>User can cancel an upgrade before it is finalized using the below command:</p>
|
|
|
|
<div class="source">
|
|
<div class="source">
|
|
<pre>yarn app -upgrade ${service_name} -cancel
|
|
</pre></div></div>
|
|
|
|
<p>e.g. Before the upgrade is finalized, the command below cancels the upgrade of <code>my-sleeper</code>:</p>
|
|
|
|
<div class="source">
|
|
<div class="source">
|
|
<pre>yarn app -upgrade my-sleeper -cancel
|
|
</pre></div></div>
|
|
</section><section>
|
|
<h3><a name="Express_Upgrade"></a>Express Upgrade</h3>
|
|
<p>User can upgrade a service in one using the below command:</p>
|
|
|
|
<div class="source">
|
|
<div class="source">
|
|
<pre>yarn app -upgrade ${service_name} -express ${path_to_new_service_def_file}
|
|
</pre></div></div>
|
|
|
|
<p>e.g. The command below express upgrades <code>my-sleeper</code>:</p>
|
|
|
|
<div class="source">
|
|
<div class="source">
|
|
<pre>yarn app -upgrade my-sleeper -express sleeper_v101.json
|
|
</pre></div></div></section></section>
|
|
</div>
|
|
</div>
|
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<div class="clear">
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<hr/>
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</div>
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<div id="footer">
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<div class="xright">
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© 2008-2023
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Apache Software Foundation
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- <a href="http://maven.apache.org/privacy-policy.html">Privacy Policy</a>.
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Apache Maven, Maven, Apache, the Apache feather logo, and the Apache Maven project logos are trademarks of The Apache Software Foundation.
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