2. #build an image for hadoop from a dockerfile docker build -t hadoop .

3. create config files bootstrap.sh, ssh_config, sshd_config, slaves, core-site.xml, hdfs-site.xml, mapred-sit.xml,yarn-site.xml

4.create a network for hadoop cluster docker network create --driver=bridge hadoop

5. create hadoop master docker rm -f hadoop-master docker run -itd --net=hadoop -p 50070:50070 -p 8088:8088 --name hadoop-master --hostname hadoop-master hadoop

6. create hadoop slave1,2,3 docker run -itd --net=hadoop --name hadoop-slave1 --hostname hadoop-slave1 hadoop &> /dev/null docker run -itd --net=hadoop --name hadoop-slave2 --hostname hadoop-slave2 hadoop &> /dev/null docker run -itd --net=hadoop --name hadoop-slave3 --hostname hadoop-slave3 hadoop &> /dev/null

7. login hadoop-master docker exec -it hadoop-master bash

8. hdfs namenode -format

9. start-dfs.sh

10. start-yarn.sh

11. get hadoop-master's ip docker inspect hadoop-master

12. input hadoop-master's ip:8088 to browser hadoop cluster

13. run test.sh in hadoop-master container to test hadoop-cluser.