Docker Hadoop是指在Docker容器中運行Hadoop集群的解決方案，它將Hadoop的各個組件打包到Docker容器中，從而快速地部署和管理Hadoop集群。

使用Docker Hadoop有以下好處：

• 快速部署：Docker容器化的Hadoop集群可以一鍵部署，非常方便快捷。
• 可重用性：Docker容器是可重用的，可以在多個環境中使用相同的容器來運行Hadoop集群。
• 易于管理：Docker容器具有輕量級、可移植、可擴展的特性，可以更輕松地管理Hadoop集群。

docker-compose up -d

可以使用docker-compose來快速啟動Docker Hadoop集群，其中docker-compose.yml文件的內容如下所示：

version: '2.2'
services:
namenode:
image: sequenceiq/hadoop-docker:2.7.1
container_name: namenode
hostname: namenode
ports:
- "50070:50070"
- "9000:9000"
volumes:
- ./data:/data
environment:
- CLUSTER_NAME=docker-hadoop
- HOSTNAME=namenode
datanode:
image: sequenceiq/hadoop-docker:2.7.1
container_name: datanode
environment:
- JOIN_IP=namenode
- CLUSTER_NAME=docker-hadoop
- HOSTNAME=datanode
volumes:
- ./data:/data
depends_on:
- namenode
resourcemanager:
image: sequenceiq/hadoop-docker:2.7.1
container_name: resourcemanager
hostname: resourcemanager
environment:
- CLUSTER_NAME=docker-hadoop
- HOSTNAME=resourcemanager
ports:
- "8088:8088"
depends_on:
- namenode
nodemanager:
image: sequenceiq/hadoop-docker:2.7.1
container_name: nodemanager
environment:
- JOIN_IP=namenode
- CLUSTER_NAME=docker-hadoop
- HOSTNAME=nodemanager
volumes:
- ./data:/data
depends_on:
- namenode
- resourcemanager
historyserver:
image: sequenceiq/hadoop-docker:2.7.1
container_name: historyserver
hostname: historyserver
environment:
- CLUSTER_NAME=docker-hadoop
- HOSTNAME=historyserver
ports:
- "19888:19888"
depends_on:
- namenode
- resourcemanager

通過docker-compose up命令，即可快速啟動Docker Hadoop集群。