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config
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README.md
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README.md

Deploy one Hadoop Cluster with docker

Start Master

docker service create \
  --name hadoop-master \
  --hostname hadoop-master \
  --network swarm-net \
  --replicas 1 \
  --detach=true \
  --endpoint-mode dnsrr \
  --mount type=bind,source=/etc/localtime,target=/etc/localtime \
  newnius/hadoop:2.7.4

Start slaves

docker service create \
  --name hadoop-slave1 \
  --hostname hadoop-slave1 \
  --network swarm-net \
  --replicas 1 \
  --detach=true \
  --endpoint-mode dnsrr \
  --mount type=bind,source=/etc/localtime,target=/etc/localtime \
  newnius/hadoop:2.7.4
docker service create \
  --name hadoop-slave2 \
  --network swarm-net \
  --hostname hadoop-slave2 \
  --replicas 1 \
  --detach=true \
  --endpoint-mode dnsrr \
  --mount type=bind,source=/etc/localtime,target=/etc/localtime \
  newnius/hadoop:2.7.4
docker service create \
  --name hadoop-slave3 \
  --hostname hadoop-slave3 \
  --network swarm-net \
  --replicas 1 \
  --detach=true \
  --endpoint-mode dnsrr \
  --mount type=bind,source=/etc/localtime,target=/etc/localtime \
  newnius/hadoop:2.7.4

Init for the first time

format dfs first

Run these commands on the master node.

# stop HDFS services
sbin/stop-dfs.sh

# format HDFS meta data
bin/hadoop namenode -format

# restart HDFS services
sbin/start-dfs.sh

Run a test job

To make sure youui have successfully setup the Hadoop cluster, just run the floowing commands to see if it is executed well.

# prepare input data
bin/hadoop dfs -mkdir -p /user/root/input

# copy files to input path
bin/hadoop dfs -put etc/hadoop/* /user/root/input

# submit the job
bin/hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples*.jar grep input output 'dfs[a-z.]+'

Browse the web UI

You can expose the ports in the script, but I'd rather not since the slaves shoule occupy the same ports.

To access the web UI, deploy another (socks5) proxy to route the traffic.

If you don't one, try newnius/docker-proxy, it is rather easy to use.

Visit hadoop-master:8088 fo YARN pages.

Visit hadoop-master:50070 fo YARN pages.

Custom configuration

To persist data or modify the conf files, refer to the following script.

The /config/hadoop path is where new conf files to be replaces, you don't have to put all the files.

docker service create \
  --name hadoop-master \
  --hostname hadoop-master \
  --network swarm-net \
  --replicas 1 \
  --detach=true \
  --endpoint-mode dnsrr \
  --mount type=bind,source=/etc/localtime,target=/etc/localtime \
  --mount type=bind,source=/data/hadoop/config,target=/config/hadoop \
  --mount type=bind,source=/data/hadoop/hdfs/master,target=/tmp/hadoop-root \
  --mount type=bind,source=/data/hadoop/logs/master,target=/usr/local/hadoop/logs \
  newnius/hadoop:2.7.4