blog/2013/09/19/launching-druid-with-apache-whirr.html (200 lines of code) (raw):
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<h1>Launching Druid With Apache Whirr</h1>
<p class="text-muted">by <span class="author text-uppercase">Russell Jurney</span> · September 19, 2013</p>
<p>Without Whirr, to launch a Druid cluster, you'd have to provision machines yourself, and then install each node type manually. This process is outlined <a href="https://github.com/metamx/druid/wiki/Tutorial%3A-The-Druid-Cluster">here</a>. With Whirr, you can boot a druid cluster by editing a simple configuration file and then issuing a single command!</p>
<h2 id="about-druid">About Druid</h2>
<p>Druid is a rockin' exploratory analytical data store capable of offering interactive query of big data in realtime - as data is ingested. Druid cost effectively drives 10's of billions of events per day for the <a href="http://www.metamarkets.com">Metamarkets</a> platform, and Metamarkets is committed to building Druid in open source.</p>
<h2 id="about-apache-whirr">About Apache Whirr</h2>
<p>Apache Whirr is a set of libraries for running cloud services. It allows you to use simple commands to boot clusters of distributed systems for testing and experimentation. Apache Whirr makes booting clusters easy.</p>
<h2 id="installing-whirr">Installing Whirr</h2>
<p>Until Druid is part of an Apache release (a month or two from now) of Whirr, you'll need to clone the code from <a href="https://github.com/rjurney/whirr/tree/trunk">https://github.com/rjurney/whirr/tree/trunk</a> and build Whirr.</p>
<div class="highlight"><pre><code class="language-text" data-lang="text"><span></span>git clone git@github.com:rjurney/whirr.git
cd whirr
git checkout trunk
mvn clean install -Dmaven.test.failure.ignore=true
</code></pre></div>
<h2 id="configuring-your-cloud-provider">Configuring your Cloud Provider</h2>
<p>You'll need to set these environment variables:</p>
<div class="highlight"><pre><code class="language-text" data-lang="text"><span></span>export WHIRR_PROVIDER=aws-ec2
export WHIRR_IDENTITY=$AWS_ACCESS_KEY_ID
export WHIRR_CREDENTIAL=$AWS_SECRET_ACCESS_KEY
</code></pre></div>
<h2 id="build-properties">build.properties</h2>
<div class="highlight"><pre><code class="language-text" data-lang="text"><span></span>cat recipes/druid.properties
</code></pre></div>
<p>Much of the configuration is self explanatory:</p>
<div class="highlight"><pre><code class="language-text" data-lang="text"><span></span># Change the cluster name here
whirr.cluster-name=druid
# Change the number of machines in the cluster here
whirr.instance-templates=1 zookeeper+druid-mysql+druid-master+druid-broker+druid-compute+druid-realtime
# whirr.instance-templates=3 zookeeper,1 druid-mysql,2 druid-realtime,2 druid-broker,2 druid-master,5 druid-compute
# Which version of druid to load
whirr.druid.version=0.5.54
# S3 bucket to store segments in
whirr.druid.pusher.s3.bucket=dummy_s3_bucket
# The realtime.spec file to use to configure a realtime node
# whirr.druid.realtime.spec.path=/path/to/druid/examples/config/realtime/realtime.spec
</code></pre></div>
<p>Note that you can change a cluster's configuration with the whirr.instance-templates parameter. This enables you to boot clusters large or small. Note that at least one zookeeper and druid-mysql nodes are required.</p>
<h2 id="launching-a-druid-cluster-with-whirr">Launching a Druid Cluster with Whirr</h2>
<div class="highlight"><pre><code class="language-text" data-lang="text"><span></span>bin/whirr launch-cluster --config recipes/druid.properties
</code></pre></div>
<p>When the cluster is ready, ssh instructions will print and we can connect and use the cluster. For more instructions on using a Druid cluster, see <a href="https://github.com/metamx/druid/wiki/Querying-your-data">here</a>. To destroy a cluster when we're done, run:</p>
<div class="highlight"><pre><code class="language-text" data-lang="text"><span></span>bin/whirr destroy-cluster --config recipes/druid.properties
</code></pre></div>
<p>We hope Apache Whirr makes experimenting with Druid easier than ever!</p>
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