fd1c6643b8
- "Quick Start": docker-compose command plus published interfaces and how to access them. Clarified how to get docker internal network ip address - "Configure Environment Variables": moved hadoop.env configuration to its own section for clarity
51 lines
1.8 KiB
Markdown
51 lines
1.8 KiB
Markdown
# Changes
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Version 1.1.0 introduces healthchecks for the containers.
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# Hadoop Docker
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## Supported Hadoop Versions
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* 2.7.1 with OpenJDK 7
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* 2.7.1 with OpenJDK 8
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## Quick Start
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To deploy an example HDFS cluster, run:
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```
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docker-compose up
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```
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`docker-compose` creates a docker network that can be found by running `docker network list`, e.g. `dockerhadoop_default`.
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Run `docker network inpect` on the network (e.g. `dockerhadoop_default`) to find the IP the hadoop interfaces are published on. Access these interfaces with the following URLs:
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* Namenode: http://<dockerhadoop_IP_address>:50070/dfshealth.html#tab-overview
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* History server: http://<dockerhadoop_IP_address>:8188/applicationhistory
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* Datanode: http://<dockerhadoop_IP_address>:50075/
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* Nodemanager: http://<dockerhadoop_IP_address>:8042/node
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* Resource manager: http://<dockerhadoop_IP_address>:8088/
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## Configure Environment Variables
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The configuration parameters can be specified in the hadoop.env file or as environmental variables for specific services (e.g. namenode, datanode etc.):
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```
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CORE_CONF_fs_defaultFS=hdfs://namenode:8020
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```
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CORE_CONF corresponds to core-site.xml. fs_defaultFS=hdfs://namenode:8020 will be transformed into:
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```
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<property><name>fs.defaultFS</name><value>hdfs://namenode:8020</value></property>
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```
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To define dash inside a configuration parameter, use double underscore, such as YARN_CONF_yarn_log___aggregation___enable=true (yarn-site.xml):
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```
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<property><name>yarn.log-aggregation-enable</name><value>true</value></property>
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```
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The available configurations are:
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* /etc/hadoop/core-site.xml CORE_CONF
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* /etc/hadoop/hdfs-site.xml HDFS_CONF
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* /etc/hadoop/yarn-site.xml YARN_CONF
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* /etc/hadoop/httpfs-site.xml HTTPFS_CONF
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* /etc/hadoop/kms-site.xml KMS_CONF
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If you need to extend some other configuration file, refer to base/entrypoint.sh bash script. |