From b5605bc41645863239bd17eb6dea59e49d4a57e5 Mon Sep 17 00:00:00 2001
From: Benedikt Elser <benedikt.elser@th-deg.de>
Date: Thu, 17 Jun 2021 11:29:17 +0200
Subject: [PATCH] Doku
---
README.md | 26 +++++++++++++-------------
1 file changed, 13 insertions(+), 13 deletions(-)
diff --git a/README.md b/README.md
index d827f0a..6eea9ec 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,7 @@ forked from https://github.com/rancavil/hadoop-single-node-cluster
Following this steps you can build and use the image to create a Hadoop Single Node Cluster containers.
## Creating the hadoop image
+If you want to recreate the container run
$ git clone https://mygit.th-deg.de/systemdesign/hadoop-single-node-cluster.git
$ cd hadoop-single-node-cluster
@@ -14,12 +15,20 @@ Following this steps you can build and use the image to create a Hadoop Single N
To run and create a container execute the next command:
+ $ docker run --name <container-name> -p 9864:9864 -p 9870:9870 -p 8088:8088 --hostname <your-hostname> registry.mygit.th-deg.de/systemdesign/hadoop-single-node-cluster
+
+Change **container-name** by your favorite name and set **your-hostname** with by your ip or name machine. You can use **localhost** as your-hostname. If you built the container yourself use
+
$ docker run -it --name <container-name> -p 9864:9864 -p 9870:9870 -p 8088:8088 --hostname <your-hostname> hadoop
-Change **container-name** by your favorite name and set **your-hostname** with by your ip or name machine. You can use **localhost** as your-hostname
+Or using the appropriate image name you used in the `docker build` step.
When you run the container, at the entrypoint you use the docker-entrypoint.sh shell that creates and starts the hadoop environment.
+To log in the running container use
+
+ $ docker exec -it <container-name> bash
+
You should get the following prompt:
hduser@localhost:~$
@@ -28,12 +37,7 @@ To check if hadoop container is working go to the url in your browser.
http://localhost:9870
-**Notice:** the hdfs-site.xml configure has the property, so don't use it in a production environment.
-
- <property>
- <name>dfs.permissions</name>
- <value>false</value>
- </property>
+**Notice:** the hdfs-site.xml uses no permissions, hence is insecure. So don't use it in a production environment.
## A first example
@@ -82,15 +86,11 @@ Checking the result using **cat** command on the distributed filesystem:
To stop the container execute the following commands, to gratefully shutdown.
- hduser@localhost:~$ stop-dfs.sh
- hduser@localhost:~$ stop-yarn.sh
-
-After that.
+ $ docker stop <container-name>
- hduser@localhost:~$ exit
+Or press CTRL-C if your container is not running in the backgrund
To re-start the container, and go back to our Hadoop environment execute:
$ docker start -i <container-name>
-
--
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