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Installing Unravel Server on an EC2 instance

This topic explains how to create a new EC2 instance, set up RDS (optionally), install and configure Unravel Server on the new EC2 instance, and connect it to the EMR cluster you want to monitor.


If you have not already done so, confirm your cluster meets Unravel's hosting requirements.

1. Create an EC2 instance
2. Configure the EC2 instance
  1. Disable selinux.

    sudo setenforce Permissive
  2. Edit /etc/selinux/config to make sure the setting persists after reboot and make sure SELINUX=permissive.

    sudo vi /etc/selinux/config
  3. Install libaio.x86_64, lzop.x86_64, and ntp.x86_64.

    sudo yum install -y libaio.x86_64
    sudo yum install -y lzop.x86_64
    sudo yum install -y ntp.x86_64
  4. Start ntpd and check the system time.

    sudo service ntpd start
    sudo ntpq -p
  5. Create a new user named hadoop.

    sudo useradd hadoop
4. Install the Unravel RPM on the EC2 instance

The installation creates the following items:

  • Virtualization type: HVM

  • User unravel (if it doesn't exist already).

  • /etc/init.d/unravel_* scripts for controlling services, and /etc/init.d/ which you can use to manually stop, start, and get status of all daemons in proper order.

  1. Download the Unravel Server RPM.

  2. Install the Unravel Server RPM.

    The precise filename varies depending on the version, how it was fetched, or copied.

    sudo rpm -Uvh unravel-version.rpm
  3. Append the following line to /usr/local/unravel/etc/

  4. For monitoring EMR Spark service, add the following properties to
  5. Run the script..

    usr/local/unravel/install_bin/ hdfs hadoop
6. Log into Unravel UI
  1. Start Unravel daemons.

    sudo /etc/init.d/ start
  2. Create an SSH tunnel from your workstation to the Unravel EC2 instance.

    ssh -i ssh_key.pem centos@unravel-host-ip -L 3000:
  3. Using a supported web browser (see Unravel's ​​Amazon EMR​ compatibility matrix), navigate to and log in with username admin with password unraveldata.