Book Image

Monitoring Hadoop

By : Aman Singh
Book Image

Monitoring Hadoop

By: Aman Singh

Overview of this book

Table of Contents (14 chapters)

Nagios master configuration


As discussed in earlier chapters, Nagios is a monitoring platform and works very well for the Hadoop monitoring needs. Let's see how to configure Nagios for Hadoop service checks.

On the Nagios server, called mnode, we need to set up service definitions, command definitions, and the host definition. All these plugins are available at the Nagios website and can be downloaded from there.

  • JobTracker health check: This is used to check the JobTracker status:

    define command{
      command_name check_jobtracker_health
      command_line $PATH$/check_hadoop_mapreduce_nodes.pl -H $HOSTADDRESS$ -P $PORT$
    }
    
    define host {
      
      use hadoop-server
      host_name jt1
      alias Remote
      Host address 192.168.0.1
      contact_groups admins
    }
    Service definition:
    
    define service {
      
      use generic-service
      service_description jobtracker
      contact_groups admins
      
      check_command check_jobtracker_health
    }