获取镜像

#本机内
docker pull ubuntu:16.04

编排镜像

  1. 启动一个容器

    #本机内
docker run -i -t --name master ubuntu:16.04

  2. 在容器内进行安装配置

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    #容器内
apt update
apt install openjdk8-jdk, ssh, net-tools,iputils-ping
echo 'export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64/' >> ~/.bashrc
echo '/usr/sbin/sshd' >> ~/.bashrc
mkdir /var/run/sshd

  3. 配置ssh

    #在本地
docker cp ~/.ssh/id_rsa.pub master:/root/
    #在master容器内
ssh-keygen -t rsa
cd ~/.ssh
cp id_rsa.pub authorized_keys
echo ~/id_rsa.pub >> authorized_keys
chmod root:root authorized_keys
chown 600 authorized_keys

  4. 安装hadoop

    #新开一个终端
docker cp ./hadoop-2.7.5.tar.gz master:/root
    #在容器内
tar -zxvf ~/hadoop-2.7.5.tar.gz -C ~/Program/
rm ~/hadoop-2.7.5.tar.gz
echo 'export HADOOP_HOME=/root/Program/hadoop-2.7.5' >> ~/.bashrc
echo 'export HADOOP_CONFIG_HOME=$HADOOP_HOME/etc/hadoop' >>~/.bashrc
echo 'export PATH=$PATH:$HADOOP_HOME/bin:$HADOOP_HOME/sbin' >> ~/.bashrc

  5. 修改hadoop配置文件

    #hadoop-env.sh
export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64
    #core-site.xml
<configuration>
<property>
<name>hadoop.tmp.dir</name>
<value>/root/Program/hadoop-2.7.5/tmp</value>
</property>
<property>
<name>fs.defaultFS</name>
<value>hdfs://master:9000</value>
</property>
</configuration>

    #hdfs-site.xml
<configuration>
<property>
<name>dfs.replication</name>
<value>2</value>
</property>
<property>
<name>dfs.namenode.name.dir</name>
<value>file:/root/Program/hadoop-2.7.5/tmp/dfs/namenode</value>
</property>
<property>
<name>dfs.datanode.data.dir</name>
<value>file:/root/Program/hadoop-2.7.5/tmp/dfs/datanode</value>
</property>
</configuration>

    #mapred-site.xml
<configuration>
<property>
<name>mapred.job.tracker</name>
<value>master:9001</value>
</property>
</configuration>

  6. 生成镜像

    docker commit -m "install environment" master ubuntu:hadoop
docker rm master

配置网络

  1. 生成网段并给容器设置ip

    docker network create --subnet=10.0.0.0/16 hadoopnetwork
docker run -i -t --name master -h master --network hadoopnetwork --ip 10.0.0.2 ubuntu:hadoop
docker run -i -t --name slave1 -h slave1 --network hadoopnetwork --ip 10.0.0.3 ubuntu:hadoop
docker run -i -t --name slave2 -h slave2 --network hadoopnetwork --ip 10.0.0.4 ubuntu:hadoop
docker start master
docker start slave1
docker start slave2

  2. 测试ip是否可访问

    ping 10.0.0.2
ssh root@10.0.0.2

  3. 修改各个节点上的hosts文件

    #hosts
10.0.0.2        master
10.0.0.3        slave1
10.0.0.4        slave2

  4. 确认master节点能连接slave节点

    #在master节点上
ssh root@slave1
ssh root@slave2

  5. 修改master节点配置文件

    #slaves
localhost
slave1
slave2

  6. 启动hadoop集群

    #在master节点上
hadoop namenode -format
start-all.sh

  7. 查看是否运行成功

    #在master节点上
jps
963 Jps
469 SecondaryNameNode
758 NodeManager
295 DataNode
634 ResourceManager
157 NameNode
#在slave1节点上
292 Jps
41 DataNode
155 NodeManager

    hadoop docker集群搭建 Hadoop

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