Chapter 25. Installing Apache Slider

Prerequisites

You must have at least core Hadoop on your system. See Configure the Remote Repositories for more information.
Verify the HDP repositories are available:
```
yum list slider
```
The output should list at least one Slider package similar to the following:
```
slider.noarch <version>
```
If yum responds with "Error: No matching package to list" as shown below, yum cannot locate a matching RPM. This can happen if the repository hosting the HDP RPMs is unavailable, or has been disabled. Follow the instructions at Configure the Remote Repositories to configure either a public or private repository before proceeding.
```
Error: No matching package to list.
```

Installation

Run the following command to install Slider.
- For RHEL/CentOS/Oracle Linux:
  yum install slider_2*
- For SLES:
  zypper install slider_2*
- For Ubuntu:
  apt-get install slider_2*

As the root user, edit the following properties in the /etc/hadoop/conf/yarn-site.xml file.

<property>
     <name>hadoop.registry.zk.quorum</name>
     <value>TODO-ZOOKEEPERQUORUM-SERVERS</value>
     <description>List of hostname:port pairs defining the zookeeper quorum binding for the registry
     </description>
</property>
 
<property>
     <name>hadoop.registry.rm.enabled</name>
     <value>true</value>
     <description> Is the registry enabled: does the RM start it up, create the user
        and system paths, and purge service records when containers, application attempts
        and applications complete?
     </description>
</property>

Set hadoop.registry.rm.enabled to true and replace TODO-ZOOKEEPERQUORUM-SERVERS with the address and port number of your ZooKeeper Quorum server (usually assigned to port 2181). For example:

<property>
     <name>hadoop.registry.zk.quorum</name>
     <value>node-1.example.com:2181</value>
     <description>List of hostname:port pairs defining the zookeeper quorum binding for the registry
     </description>
</property>
 
<property>
     <name>hadoop.registry.rm.enabled</name>
     <value>true</value>
     <description>Is the registry enabled: does the RM start it up, create the user
        and system paths, and purge service records when containers, application attempts
        and applications complete?
     </description>
</property>

As the root user, specify the JDK_HOME and HADOOP_CONF_DIR settings in the /etc/slider/conf/slider-env.sh file. For example:

# this is the shell script to start Slider deploying an application
# Usage: slider <action> <commands>

# The env variable SLIDER_JVM_OPTS can be used to override
# the default JVM opts

export JAVA_HOME=/usr/hadoop-jdk1.6.0_31
export HADOOP_CONF_DIR=/etc/hadoop/conf

Use the following command to switch to the slider bin directory:
cd /usr/hdp/current/slider-client/bin
Use the Slider version command to verify that Slider has installed properly:
./slider version

Ensure that there are no errors, and that your results say “Compiled against Hadoop <current_hadoop_version>”.

[root@node-1 bin]# ./slider version
2014-10-27 14:42:45,340 [main] INFO client.SliderClient - Slider Core-0.51.0.2.2.0.0-1103 Built against commit# d766e78d77 on Java 1.6.0_31 by jenkins
2014-10-27 14:42:45,351 [main] INFO client.SliderClient - Compiled against Hadoop 2.6.0.2.2.0.0-1103
2014-10-27 14:42:45,375 [main] INFO client.SliderClient - Hadoop runtime version (no branch) with source checksum 517963c273a1f4f8f5bfc15d92aa013 and build date 2014-10-27T03:27Z
2014-10-27 14:42:45,383 [main] INFO util.ExitUtil - Exiting with status 0
[root@node-1 bin]#

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