Fluo 1.2.0 documentation  >>  Administration  >>  Run Fluo in YARN

An Apache Fluo application can be started in Hadoop YARN using the Fluo YARN launcher.

Requirements

To launch a Fluo application in YARN, you’ll need the following software installed.

Instructions for installing Fluo YARN can be found below. See the related projects page for external projects that may help in setting up all of these dependencies.

Set up your Fluo application

Before you can launch a Fluo application in YARN, you should install Fluo and initialize your application. After your application has been initialized, follow the instructions below to install the Fluo YARN launcher and run your application in YARN. Avoid using the fluo command to start local oracle and worker processes if you are running in YARN.

Install and Configure Fluo YARN launcher

To install the Fluo YARN launcher, you will need to obtain a distribution tarball. It is recommended that you download the latest release. You can also build a distribution from the main branch by following these steps which create a tarball in distribution/target:

git clone https://github.com/apache/fluo-yarn.git
cd fluo-yarn/
mvn package

After you obtain a Fluo YARN distribution tarball, follow these steps to install Fluo.

1. Choose a directory with plenty of space, untar the distribution, and run fetch.sh to retrieve dependencies:

    tar -xvzf fluo-yarn-1.0.0-bin.tar.gz
    cd fluo-yarn-1.0.0
    ./lib/fetch.sh
   

   The distribution contains a fluo-yarn script in bin/ that administers Fluo and the following configuration files in conf/:

   Configuration file	Description
   fluo-yarn-env.sh	Configures classpath for fluo-yarn script. Required for all commands.
   fluo-yarn.properties	Configures how application runs in YARN. Required for start command.
   log4j.properties	Configures logging

2. Configure fluo-yarn-env.sh

   • Set FLUO_HOME if it is not in your environment
   • Modify FLUO_CONN_PROPS if you don’t want use the default.

3. Configure fluo-yarn.properties to set how your application will be launched in YARN:

   • YARN resource manager hostname
   • Number of oracle and worker instances
   • Max memory usage per oracle/worker

   If you are managing multiple Fluo applications in YARN, you can copy this file and configure it for each application.

Start Fluo application in YARN

Follow the instructions below to start your application in YARN. If you have not done so already, you should initialize your Fluo application before following these instructions.

1. Configure fluo-yarn-env.sh and fluo-yarn.properties if you have not already.

2. Run the commands below to start your Fluo application in YARN.

    fluo-yarn start myapp conf/fluo-yarn.properties
   

   The commands will retrieve your application configuration and observer jars (using your application name) before starting the application in YARN. The command will output a YARN application ID that can be used to find your application in the YARN resource manager and view its logs.

Manage Fluo application in YARN

Except for stopping your application in YARN, the fluo script can be used to manage your application using the scan and wait commands.

When you want you stop your Fluo application, use the the YARN resource manager or the yarn application -kill <App ID> to stop the application in YARN.