Storm on Mesos

Overview

Storm integration with the Mesos cluster resource manager.

To use a release, you first need to unpack the distribution, fill in configurations listed below into the conf/storm.yaml file and start Nimbus using storm-mesos nimbus.

The Mesosphere site has a tutorial which goes into more details.

Note: It is not necessary to repack the distribution - the configuration is automatically pushed out to the slaves from Nimbus.

Requirements

• Oracle JDK 1.7 OpenJDK 1.7 might work too, but that has not been tested. The code was compiled with Oracle JDK 1.7 and will not work on Java 1.6.

Building

Run build-release.sh to download storm distribution and bundle Storm with this framework into one tar release.

bin/build-release.sh

This will build a Mesos executor package. You'll need to edit storm.yaml and supply the Mesos master configuration as well as the executor package URI (produced by the step above).

Sub-commands

Sub-commands can be invoked similar to git sub-commands.

For example the following command will download the Storm release zip into the current working directory.

bin/build-release.sh downloadStormRelease

• clean

  Attempts to clean working files and directories created when building.

• mvnPackage

  Runs the maven targets necessary to build the Storm Mesos framework.

• prePackage

  Prepares the working directories to be able to package the Storm Mesos framework.

  • Optional argument specifying the Storm release zip to package against.

• package

  Packages the Storm Mesos Framework.

• downloadStormRelease

  A utility function to download the Storm release zip for the targeted storm release.

  Set MIRROR environment variable to configure download mirror.

• dockerImage

  Builds a Docker image based on the current packaged storm. Run ./bin/build-release.sh before running this subcommand.

• help

  Prints out usage information about the build-release.sh script.

Running Storm on Mesos

Along with the Mesos master and Mesos cluster, you'll need to run the Storm master as well. Launch Nimbus with this command:

bin/storm-mesos nimbus

It's recommended that you also run the UI on the same machine as Nimbus via the following command:

bin/storm ui

There's a minor bug in the UI where it displays the number of slots in the cluster – you don't need to worry about this.

Topologies are submitted to a Storm/Mesos cluster the exact same way they are submitted to a regular Storm cluster.

Storm/Mesos provides resource isolation between topologies. So you don't need to worry about topologies interfering with one another.

Mandatory configuration

1. mesos.executor.uri: Once you fill in the configs and repack the distribution, you need to place the distribution somewhere where Mesos executors can find it. Typically this is on HDFS, and this config is the location of where you put the distibution.

2. mesos.master.url: URL for the Mesos master.

3. storm.zookeeper.servers: The location of the Zookeeper servers to be used by the Storm master.

4. nimbus.host: The hostname of where you run Nimbus.

Optional configuration

• mesos.supervisor.suicide.inactive.timeout.secs: Seconds to wait before supervisor to suicides if supervisor has no task to run. Defaults to "120".
• mesos.master.failover.timeout.secs: Framework failover timeout in second. Defaults to "3600".
• mesos.allowed.hosts: Allowed hosts to run topology, which takes hostname list as a white list.
• mesos.disallowed.hosts: Disallowed hosts to run topology, which takes hostname list as a back list.
• mesos.framework.role: Framework role to use. Defaults to "*".
• mesos.framework.checkpoint: Enabled framework checkpoint or not. Defaults to false.
• mesos.offer.lru.cache.size: LRU cache size. Defaults to "1000".
• mesos.local.file.server.port: Port for the local file server to bind to. Defaults to a random port.
• mesos.framework.name: Framework name. Defaults to "Storm!!!".
• mesos.framework.principal: Framework principal to use to register with Mesos
• mesos.framework.secret.file: Location of file that contains the principal's secret. Secret cannot end with a NL.
• supervisor.autostart.logviewer: Default is true, if not false please add 128M to topology.mesos.executor.mem.mb

Resource configuration

• topology.mesos.worker.cpu: CPUs per worker. Defaults to "1".
• topology.mesos.worker.mem.mb: Memory (in MiB) per worker. Defaults to "1000".
  • worker.childopts: Use this for JVM opts. You should have about 25% memory overhead for each task. For example, with -Xmx1000m, you should set topology.mesos.worker.mem.mb: 1250
• topology.mesos.executor.cpu: CPUs per executor. Defaults to "1".
• topology.mesos.executor.mem.mb: Memory (in MiB) per executor. Defaults to "1000".
  • supervisor.childopts: Use this for executor (aka supervisor) JVM opts. You should have about 25% memory overhead for each task. For example, with -Xmx500m, you should set topology.mesos.executor.mem.mb: 625