2.3. Minimum Settings for Automatic ResourceManager HA Configuration

The minimum yarn-site.xml configuration settings for ResourceManager HA with automatic failover are as follows:

   <property>
        <name>yarn.resourcemanager.ha.enabled</name>
        <value>true</value>
    </property>

    <property>
        <name>yarn.resourcemanager.ha.rm-ids</name>
        <value>rm1,rm2</value>
    </property>

    <property>
        <name>yarn.resourcemanager.hostname.rm1</name>
        <value>192.168.1.9</value>
    </property>

    <property>
        <name>yarn.resourcemanager.hostname.rm2</name>
        <value>192.168.1.10</value>
    </property>

    <property>
        <name>yarn.resourcemanager.recovery.enabled</name>
        <value>true</value>
    </property>

    <property>
        <name>yarn.resourcemanager.store.class</name>
        <value>org.apache.hadoop.yarn.server.resourcemanager.recovery.ZKRMStateStore</value>
    </property>

    <property>
        <name>yarn.resourcemanager.zk-address</name>
        <value>192.168.1.9:2181,192.168.1.10:2181</value>
        <description>For multiple zk services, separate them with comma</description>
    </property>

    <property>
          <name>yarn.resourcemanager.cluster-id</name>
          <value>yarn-cluster</value>
        </property>

Testing ResourceManager HA on a Single Node

If you would like to test ResourceManager HA on a single node (launch more than one ResourceManager on a single node), you need to add the following settings in yarn-site.xml:

To enable ResourceManager "rm1" to launch:

<property>
        <name>yarn.resourcemanager.ha.id</name>
        <value>rm1</value>
        <description>If we want to launch more than one RM in single node, we need this configuration</description>
    </property>

To enable ResourceManager "rm2" to launch:

<property>
        <name>yarn.resourcemanager.ha.id</name>
        <value>rm2</value>
        <description>If we want to launch more than one RM in single node, we need this configuration</description>
    </property>

You should also explicitly set values specific to each ResourceManager for the following properties:

For example:

    <!-- RM1 Configs -->
    <property>
        <name>yarn.resourcemanager.address.rm1</name>
        <value>localhost:23140</value>
    </property>
    <property>
        <name>yarn.resourcemanager.scheduler.address.rm1</name>
        <value>localhost:23130</value>
    </property>
    <property>
        <name>yarn.resourcemanager.webapp.address.rm1</name>
        <value>localhost:23188</value>
    </property>
    <property>
        <name>yarn.resourcemanager.resource-tracker.address.rm1</name>
        <value>localhost:23125</value>
    </property>
    <property>
        <name>yarn.resourcemanager.admin.address.rm1</name>
        <value>localhost:23141</value>
    </property>


    <!-- RM2 configs -->
    <property>
        <name>yarn.resourcemanager.address.rm2</name>
        <value>localhost:33140</value>
    </property>
    <property>
        <name>yarn.resourcemanager.scheduler.address.rm2</name>
        <value>localhost:33130</value>
    </property>
    <property>
        <name>yarn.resourcemanager.webapp.address.rm2</name>
        <value>localhost:33188</value>
    </property>
    <property>
        <name>yarn.resourcemanager.resource-tracker.address.rm2</name>
        <value>localhost:33125</value>
    </property>
    <property>
        <name>yarn.resourcemanager.admin.address.rm2</name>
        <value>localhost:33141</value>
    </property>