Merge pull request big-data-europe#17 from zeddee/cleaner-readme

Cleaned up readme for better usability

README.md

@@ -10,13 +10,25 @@ Version 1.1.0 introduces healthchecks for the containers.
 * 2.7.1 with OpenJDK 7
 * 2.7.1 with OpenJDK 8
 
-## Description
+## Quick Start
 
 To deploy an example HDFS cluster, run:
 ```
   docker-compose up
 ```
 
+`docker-compose` creates a docker network that can be found by running `docker network list`, e.g. `dockerhadoop_default`.
+
+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:
+
+* Namenode: http://<dockerhadoop_IP_address>:50070/dfshealth.html#tab-overview
+* History server: http://<dockerhadoop_IP_address>:8188/applicationhistory
+* Datanode: http://<dockerhadoop_IP_address>:50075/
+* Nodemanager: http://<dockerhadoop_IP_address>:8042/node
+* Resource manager: http://<dockerhadoop_IP_address>:8088/
+
+## Configure Environment Variables
+
 The configuration parameters can be specified in the hadoop.env file or as environmental variables for specific services (e.g. namenode, datanode etc.):
 ```
   CORE_CONF_fs_defaultFS=hdfs://namenode:8020
@@ -38,11 +50,4 @@ The available configurations are:
 * /etc/hadoop/httpfs-site.xml HTTPFS_CONF
 * /etc/hadoop/kms-site.xml KMS_CONF
 
-If you need to extend some other configuration file, refer to base/entrypoint.sh bash script.
-
-After starting the example Hadoop cluster, you should be able to access interfaces of all the components (substitute domain names by IP addresses from ```network inspect hadoop``` command):
-* Namenode: http://namenode:50070/dfshealth.html#tab-overview
-* History server: http://historyserver:8188/applicationhistory
-* Datanode: http://datanode:50075/
-* Nodemanager: http://nodemanager:8042/node
-* Resource manager: http://resourcemanager:8088/
+If you need to extend some other configuration file, refer to base/entrypoint.sh bash script.