77 lines
2.7 KiB
Markdown
77 lines
2.7 KiB
Markdown
---
|
|
title: Running concurrently with HDFS
|
|
weight: 1
|
|
menu:
|
|
main:
|
|
parent: Starting
|
|
weight: 4
|
|
---
|
|
<!---
|
|
Licensed to the Apache Software Foundation (ASF) under one or more
|
|
contributor license agreements. See the NOTICE file distributed with
|
|
this work for additional information regarding copyright ownership.
|
|
The ASF licenses this file to You 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.
|
|
-->
|
|
|
|
Ozone is designed to work with HDFS. So it is easy to deploy ozone in an
|
|
existing HDFS cluster.
|
|
|
|
Ozone does *not* support security today. It is a work in progress and tracked
|
|
in
|
|
[HDDS-4](https://issues.apache.org/jira/browse/HDDS-4). If you enable ozone
|
|
in a secure HDFS cluster, for your own protection Ozone will refuse to work.
|
|
|
|
In other words, till Ozone security work is done, Ozone will not work in any
|
|
secure clusters.
|
|
|
|
The container manager part of Ozone runs inside DataNodes as a pluggable module.
|
|
To activate ozone you should define the service plugin implementation class.
|
|
|
|
<div class="alert alert-warning" role="alert">
|
|
<b>Important</b>: It should be added to the <b>hdfs-site.xml</b> as the plugin should
|
|
be activated as part of the normal HDFS Datanode bootstrap.
|
|
</div>
|
|
|
|
{{< highlight xml >}}
|
|
<property>
|
|
<name>dfs.datanode.plugins</name>
|
|
<value>org.apache.hadoop.ozone.HddsDatanodeService</value>
|
|
</property>
|
|
{{< /highlight >}}
|
|
|
|
You also need to add the ozone-datanode-plugin jar file to the classpath:
|
|
|
|
{{< highlight bash >}}
|
|
export HADOOP_CLASSPATH=/opt/ozone/share/hadoop/ozoneplugin/hadoop-ozone-datanode-plugin.jar
|
|
{{< /highlight >}}
|
|
|
|
|
|
|
|
To start ozone with HDFS you should start the the following components:
|
|
|
|
1. HDFS Namenode (from Hadoop distribution)
|
|
2. HDFS Datanode (from the Hadoop distribution with the plugin on the
|
|
classpath from the Ozone distribution)
|
|
3. Ozone Manager (from the Ozone distribution)
|
|
4. Storage Container manager (from the Ozone distribution)
|
|
|
|
Please check the log of the datanode whether the HDDS/Ozone plugin is started or
|
|
not. Log of datanode should contain something like this:
|
|
|
|
```
|
|
2018-09-17 16:19:24 INFO HddsDatanodeService:158 - Started plug-in org.apache.hadoop.ozone.web.OzoneHddsDatanodeService@6f94fb9d
|
|
```
|
|
|
|
<div class="alert alert-warning" role="alert">
|
|
<b>Note:</b> The current version of Ozone is tested with Hadoop 3.1.
|
|
</div> |