Storm Cluster

Description

Apache Storm is a free and open source distributed
realtime computation system. Storm makes it easy to reliably process unbounded
streams of data, doing for realtime processing what Hadoop did for batch
processing. Storm is simple, can be used with any programming language, and is
a lot of fun to use!

Usage

Easy Setup

This cookbook creates the number of nodes specified by attribute
node['storm-platform']['size'] (3 by default). The first node to be created
will be setup with a Nimbus, a LogViewer and a UI. All other nodes will host a
Supervisor and a LogViewer. To get this cookbook to setup the nth node to hold
the Nimbus, Supervisor and LogViewer instead of the first one, change attribute
node['storm-platform']['nimbus_id'].

By default, this cookbook installs openjdk from the official repositories
(openjdk 8 on centos 7) just before starting the service. You can change
this behavior by setting node['storm-platform']['java'] to "", or choose
your package by setting the package name in
node['storm-platform']['java'][node[:platform]].

See [roles](test/integration/roles) for some examples and Cluster Search
documentation for more information.

Test

This cookbook is fully tested through the installation of the full platform
in docker hosts. This uses kitchen, docker and some monkey-patching.

If you run kitchen list, you will see 4 suites:

• dnsdock-centos-7
• zookeeper-centos-7
• storm-nimbus-centos-7
• storm-supervisor-centos-7

Each corresponds to a different node in the cluster.

For more information, see [.kitchen.yml](.kitchen.yml) and [test](test)
directory.

Local cluster

The cluster installed with kitchen converge is fully working and can thus be
used as a local cluster for developments tests.

One can access the cluster by adding the dnsdock used in the cluster as main
DNS resolver: add
docker inspect --format '{{.NetworkSettings.IPAddress}}' dnsdock-storm
in /etc/resolv.conf.

Changes

1.0.0:

• Initial version with Centos 7 support

Requirements

Cookbooks

Declared in [metadata.rb](metadata.rb).

Gems

Declared in [Gemfile](Gemfile).

Platforms

A systemd managed distribution:
- RHEL Family 7, tested on Centos

Note: it should work fine on Debian 8 but the official docker image does not
allow systemd to work easily, so it could not be tested.

Attributes

Configuration is done by overriding default attributes. All configuration keys
have a default defined in [attributes/default.rb](attributes/default.rb).
Please read it to have a comprehensive view of what and how you can configure
this cookbook behavior.

Recipes

default

Installs a three node cluster as follow :

• Nimbus + LogViewer + UI
• Supervisor + LogViewer
• Supervisor + LogViewer

install

Extract a Storm tarball as per attributes.

create-user

Create system user for Storm binaries to run with.

config

Apply settings from attribute configuration to Storm configuration.

systemd-services

Create Systemd service files and set them up.

Resources/Providers

None.

Contributing

You are more than welcome to submit issues and merge requests to this project.
Note however that this cookbook will probably not support another supervisor
than systemd.

Commits

Your commits must pass git log --check and messages should be formated
like this (based on this excellent
post):

Summarize change in 50 characters or less

Provide more detail after the first line. Leave one blank line below the
summary and wrap all lines at 72 characters or less.

If the change fixes an issue, leave another blank line after the final
paragraph and indicate which issue is fixed in the specific format
below.

Fix #42

Also do your best to factor commits appropriately, ie not too large with
unrelated things in the same commit, and not too small with the same small
change applied N times in N different commits. If there was some accidental
reformatting or whitespace changes during the course of your commits, please
rebase them away before submitting the PR.

Files

All files must be 80 columns width formatted (actually 79), exception when it
is not possible.

License and Author

• Author:: Guillaume Alaux (guillaume.alaux@s4m.io)
• Author:: Samuel Bernard (samuel.bernard@s4m.io)

Copyright:: 2015, Sam4Mobile

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.