Run Hadoop Cluster within Docker Containers
3 Nodes Hadoop Cluster
1. pull docker image
sudo docker pull kiwenlau/hadoop:1.0
2. clone github repository
git clone https://github.com/kiwenlau/hadoop-cluster-docker
3. create hadoop network
sudo docker network create --driver=bridge hadoop
4. start container
cd hadoop-cluster-docker
sudo ./start-container.sh
output:
start hadoop-master container...
start hadoop-slave1 container...
start hadoop-slave2 container...
root@hadoop-master:~#
- start 3 containers with 1 master and 2 slaves
- you will get into the /root directory of hadoop-master container
5. start hadoop
./start-hadoop.sh
6. run wordcount
./run-wordcount.sh
output
input file1.txt:
Hello Hadoop
input file2.txt:
Hello Docker
wordcount output:
Docker 1
Hadoop 1
Hello 2
Arbitrary size Hadoop cluster
1. pull docker images and clone github repository
do 1~3 like section A
2. rebuild docker image
sudo ./resize-cluster.sh 5
- specify parameter > 1: 2, 3..
- this script just rebuild hadoop image with different slaves file, which pecifies the name of all slave nodes
3. start container
sudo ./start-container.sh 5
- use the same parameter as the step 2
4. run hadoop cluster
do 5~6 like section A