Single Node Deployment

Single Node Development Cluster

This is the traditional way to start a development cluster from source code. Once the package is built, you can start Ozone services by going to the ozone/dist/target/ozone-*/ directory. Your Unix shell should expand the '*' wildcard to the correct Ozone version number.

Configuration

Save the minimal snippet to ozone/dist/target/ozone-*/etc/hadoop/ozone-site.xml in the compiled distribution.

<configuration>
<properties>
<property><name>ozone.scm.datanode.id.dir</name><value>/tmp/ozone/data</value></property>
<property><name>ozone.replication</name><value>1</value></property>
<property><name>ozone.metadata.dirs</name><value>/tmp/ozone/data/metadata</value></property>
<property><name>ozone.scm.names</name><value>localhost</value></property>
<property><name>ozone.om.address</name><value>localhost</value></property>
<property><name>ozone.scm.block.client.address</name><value>localhost</value></property>
<property><name>ozone.scm.client.address</name><value>localhost</value></property>
<property><name>ozone.scm.db.dirs</name><value>/tmp/ozone/scm/db</value></property>
<property><name>ozone.scm.ha.ratis.storage.dir</name><value>/tmp/ozone/scm/ratis</value></property>
<property><name>ozone.om.db.dirs</name><value>/tmp/ozone/om/db</value></property>
<property><name>ozone.om.ratis.storage.dir</name><value>/tmp/ozone/om/ratis</value></property>
<property><name>dfs.container.ratis.datanode.storage.dir</name><value>/tmp/ozone/datanode/ratis</value></property>
<property><name>hdds.datanode.dir</name><value>/tmp/ozone/datanode/data</value></property>
</properties>
</configuration>

Start Services

To start ozone, you need to start SCM, OzoneManager and DataNode. In pseudo-cluster mode, all services will be started on localhost.

  bin/ozone scm --init
  bin/ozone --daemon start scm
  bin/ozone om --init
  bin/ozone --daemon start om
  bin/ozone --daemon start datanode

Run Ozone Commands

Once you have ozone running you can use these Ozone shell commands to create a volume, bucket and keys. E.g.

  bin/ozone sh volume create /vol1
  bin/ozone sh bucket create /vol1/bucket1
  dd if=/dev/zero of=/tmp/myfile bs=1024 count=1
  bin/ozone sh key put -t=RATIS -r=ONE /vol1/bucket1/key1 /tmp/myfile
  bin/ozone sh key list /vol1/bucket1

Note: specify replication type (-t) and replication factor (-r) to one for a single node cluster.

Stop Services

  bin/ozone --daemon stop om
  bin/ozone --daemon stop scm
  bin/ozone --daemon stop datanode

Clean up your Dev Environment (Optional)

Remove the following directories to wipe the Ozone pseudo-cluster state. This will also delete all user data (volumes/buckets/keys) you added to the pseudo-cluster.

rm -fr /tmp/ozone
rm -fr /tmp/hadoop-${USER}*

Note: This will also wipe state for any running HDFS services.

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