Configuring Automatic Failover for the ResourceManager

To use automatic failover, specify multiple ResourceManagers when you run configure.sh on each node in the cluster.

The following configure.sh script syntax configures three ResourceManager nodes (one active and two standby) and one HistoryServer node:

/opt/mapr/server/configure.sh -C <CLDB node list> -Z <ZK node list> -RM <hostname1,hostname2,hostname3> -HS <hostname1> [additional parameters]
NOTE
After you run configure.sh, each ResourceManager node contains a different value for the yarn.resourcemanager.ha.id property in the yarn-site.xml.

Example yarn-site.xml file

The following configure.sh syntax specifies three ResourceManager nodes (nodeA, nodeB, and nodeC) and a HistoryServer node (nodeA):

/opt/mapr/server/configure.sh -C node1,node2,node3 -Z node1,node2,node3 -RM nodeA,nodeB,nodeC -HS nodeA [additional parameters]
<?xml version="1.0"?>
<!--
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at
    http://www.apache.org/licenses/LICENSE-2.0
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License. See accompanying LICENSE file.
-->
<configuration>
  <!-- Resource Manager HA Configs -->
  <property>
    <name>yarn.resourcemanager.ha.enabled</name>
    <value>true</value>
  </property>
  <property>
    <name>yarn.resourcemanager.ha.automatic-failover.enabled</name>
    <value>true</value>
  </property>
  <property>
    <name>yarn.resourcemanager.ha.automatic-failover.embedded</name>
    <value>true</value>
  </property>
  <property>
    <name>yarn.resourcemanager.recovery.enabled</name>
    <value>true</value>
  </property>
  <property>
    <name>yarn.resourcemanager.cluster-id</name>
    <value>yarn-my.cluster.com</value>
  </property>
  <property>
    <name>yarn.resourcemanager.ha.rm-ids</name>
    <value>rm1,rm2,rm3</value>
  </property>
  <property>
    <name>yarn.resourcemanager.ha.id</name>
    <value>rm1</value>
  </property>
  <property>
    <name>yarn.resourcemanager.zk-address</name>
    <value>node1:5181,node2:5181,node3:5181</value>
  </property>
  <!-- Configuration for rm1 -->
  <property>
    <name>yarn.resourcemanager.scheduler.address.rm1</name>
    <value>nodeA:8030</value>
  </property>
  <property>
    <name>yarn.resourcemanager.resource-tracker.address.rm1</name>
    <value>nodeA:8031</value>
  </property>
  <property>
    <name>yarn.resourcemanager.address.rm1</name>
    <value>nodeA:8032</value>
  </property>
  <property>
    <name>yarn.resourcemanager.admin.address.rm1</name>
    <value>nodeA:8033</value>
  </property>
  <property>
    <name>yarn.resourcemanager.webapp.address.rm1</name>
    <value>nodeA:8088</value>
  </property>
  <property>
    <name>yarn.resourcemanager.webapp.https.address.rm1</name>
    <value>nodeA:8090</value>
  </property>
  <!-- Configuration for rm2 -->
  <property>
    <name>yarn.resourcemanager.scheduler.address.rm2</name>
    <value>nodeB:8030</value>
  </property>
  <property>
    <name>yarn.resourcemanager.resource-tracker.address.rm2</name>
    <value>nodeB:8031</value>
  </property>
  <property>
    <name>yarn.resourcemanager.address.rm2</name>
    <value>nodeB:8032</value>
  </property>
  <property>
    <name>yarn.resourcemanager.admin.address.rm2</name>
    <value>nodeB:8033</value>
  </property>
  <property>
    <name>yarn.resourcemanager.webapp.address.rm2</name>
    <value>nodeB:8088</value>
  </property>
  <property>
    <name>yarn.resourcemanager.webapp.https.address.rm2</name>
    <value>nodeB:8090</value>
  </property>
<!-- Configuration for rm3 -->
  <property>
    <name>yarn.resourcemanager.scheduler.address.rm3</name>
    <value>nodeC:8030</value>
  </property>
  <property>
    <name>yarn.resourcemanager.resource-tracker.address.rm3</name>
    <value>nodeC:8031</value>
  </property>
  <property>
    <name>yarn.resourcemanager.address.rm3</name>
    <value>nodeC:8032</value>
  </property>
  <property>
    <name>yarn.resourcemanager.admin.address.rm3</name>
    <value>nodeC:8033</value>
  </property>
  <property>
    <name>yarn.resourcemanager.webapp.address.rm3</name>
    <value>nodec:8088</value>
  </property>
  <property>
    <name>yarn.resourcemanager.webapp.https.address.rm3</name>
    <value>nodeC:8090</value>
  </property>
  <!-- :::CAUTION::: DO NOT EDIT ANYTHING ON OR ABOVE THIS LINE -->
  <property>
    <name>yarn.resourcemanager.am.max-attempts</name>
    <value>4</value>
  </property>
</configuration>