2. Install the Configuration Files

There are several configuration files that need to be set up for Ganglia. Use the following instructions ot install the configuration files for Ganglia:

Extract the Ganglia configuration files.
From the downloaded scripts.zip file (downloaded in Download Companion Files), copy the files in the configuration_files/ganglia directory to a temporary directory.
The ganglia directory contains two sub-directories, objects and scripts.
Copy the configuration files.
On the Ganglia server host, complete the following instructions:
1. Create a directory for the objects directory and copy the objects files:
```
mkdir -p /usr/libexec/hdp/ganglia
cp $tmp-directory/ganglia/objects/* /usr/libexec/hdp/ganglia
```
2. Copy the contents of the scripts directory to init.d directory.
```
cp $tmp-directory/ganglia/scripts/* /etc/init.d
```
On each host in the cluster, copy the Ganglia monitoring init script to init.d directory:
```
cp $tmp-directory/ganglia/scripts/hdp-gmond /etc/init.d
```
Set up Ganglia hosts.
1. On the Ganglia server, execute the following commands to configure the gmond collector:
```
/usr/libexec/hdp/ganglia/setupGanglia.sh -c HDPJobTracker -m   
/usr/libexec/hdp/ganglia/setupGanglia.sh -c HDPNameNode -m
/usr/libexec/hdp/ganglia/setupGanglia.sh -c HDPSlaves -m
/usr/libexec/hdp/ganglia/setupGanglia.sh -t
```
2. If HBase is installed, execute the following command on the HBase Master host machine:
```
/usr/libexec/hdp/ganglia/setupGanglia.sh -c HDPHBaseMaster -m
```
3. On the NameNode and SecondaryNameNode servers, execute the following command to configure the gmond emitters:
```
/usr/libexec/hdp/ganglia/setupGanglia.sh -c HDPNameNode
```
4. On the JobTracker server, execute the following command to configure the gmond emitters:
```
/usr/libexec/hdp/ganglia/setupGanglia.sh -c HDPJobTracker
```
5. On all hosts, execute the following command to configure the gmond emitters:
```
/usr/libexec/hdp/ganglia/setupGanglia.sh -c HDPSlaves
```
6. If HBase is installed, execute the following command on the HBase Master host machine to configure the gmond emitter:
```
/usr/libexec/hdp/ganglia/setupGanglia.sh -c HDPHBaseMaster
```

Set up configurations.

On the Ganglia server, confirm that the bind property in each of the following files is set to the Ganglia server hostname:

/etc/ganglia/hdp/HDPNameNode/conf.d/gmond.master.conf
/etc/ganglia/hdp/HDPJobTracker/conf.d/gmond.master.conf
/etc/ganglia/hdp/HDPSlaves/conf.d/gmond.master.conf

And if HBase is installed:

/etc/ganglia/hdp/HDPHBaseMaster/conf.d/gmond.master.conf

On the Ganglia server, open the /etc/ganglia/hdp/gmetad.conf file and confirm that the data_source properties are set to the Ganglia server hostname.

For example:

data_source "HDPSlaves" $my.ganglia.server.hostname:8660
data_source "HDPNameNode" $my.ganglia.server.hostname:8661
data_source "HDPJobTracker" $my.ganglia.server.hostname:8662

And if HBase is installed:

data_source "HDPHBaseMaster" $my.ganglia.server.hostname:8663

On all hosts except the Ganglia server, open the slave configuration files and confirm that the host property is set to the Ganglia Server hostname:

/etc/ganglia/hdp/HDPNameNode/conf.d/gmond.slave.conf
/etc/ganglia/hdp/HDPJobTracker/conf.d/gmond.slave.conf
/etc/ganglia/hdp/HDPSlaves/conf.d/gmond.slave.conf

And if HBase is installed:

/etc/ganglia/hdp/HDPHBaseMaster/conf.d/gmond.slave.conf

Set up Hadoop metrics. On each host in the cluster, complete the following instructions:
1. Stop the Hadoop services using the instructions provided here.
2. Change to the Hadoop configuration directory.
```
cd $HADOOP_CONF_DIR
```
  where $HADOOP_CONF_DIR is the is the directory for storing the Hadoop configuration files. For example, /etc/hadoop/conf.
3. Copy the Ganglia metrics properties file into place.
```
mv hadoop-metrics2.properties-GANGLIA  hadoop-metrics2.properties
```
4. Edit the metrics properties file and set the Ganglia server hostname.
```
namenode.sink.ganglia.servers=$my.ganglia.server.hostname:8661
datanode.sink.ganglia.servers=$my.ganglia.server.hostname:8660
jobtracker.sink.ganglia.servers=$my.ganglia.server.hostname:8662
tasktracker.sink.ganglia.servers=$my.ganglia.server.hostname:8660
maptask.sink.ganglia.servers=$my.ganglia.server.hostname:8660
reducetask.sink.ganglia.servers=$my.ganglia.server.hostname:8660
```
5. Restart the Hadoop services using the instructions provided here.

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