docker配置全分布式hadoop(5台容器两台主节点,三台从节点)
配置全分布式Hadoop使用Docker容器的步骤概要如下:
- 准备Dockerfile来构建Hadoop镜像。
- 创建一个Hadoop配置文件,用于设置Hadoop集群参数。
- 使用
docker-compose
来启动所有容器并配置网络。
以下是一个简化的示例:
Dockerfile:
FROM openjdk:8-jdk
# 安装Hadoop
RUN apt-get update && apt-get install -y tar \
&& curl -fSL https://downloads.apache.org/hadoop/common/hadoop-3.2.2/hadoop-3.2.2.tar.gz | tar -xz -C /opt \
&& ln -s /opt/hadoop-3.2.2 /opt/hadoop \
&& rm -rf /opt/hadoop-3.2.2/lib/log4j-slf4j-impl-*.jar \
&& curl -fSL https://www.apache.org/dist/hadoop/hdfs-hadoop-hdfs/keytabs/HDFS_DELEGATION_KEY.tar.gz | tar -xz \
&& mv HDFS_DELEGATION_KEY.headless /opt/hadoop/etc/hadoop/dn_delegation_key.keystore \
&& mv HDFS_DELEGATION_KEY.login /opt/hadoop/etc/hadoop/dn_delegation_token.keytab
# 设置环境变量
ENV HADOOP_HOME /opt/hadoop
ENV PATH $PATH:$HADOOP_HOME/bin:$HADOOP_HOME/sbin
# 复制Hadoop配置文件
COPY hadoop-config/* $HADOOP_HOME/etc/hadoop/
hadoop-config/ 目录下的配置文件可能包括:
- core-site.xml
- hdfs-site.xml
- mapred-site.xml
- yarn-site.xml
- slaves
docker-compose.yml:
version: '3'
services:
namenode:
image: hadoop-image
ports:
- "50070:50070"
command: hdfs --daemon start namenode
datanode:
image: hadoop-image
depends_on:
- namenode
command: hdfs --daemon start datanode
secondarynamenode:
image: hadoop-image
depends_on:
- namenode
command: hdfs --daemon start secondarynamenode
resourcemanager:
image: hadoop-image
depends_on:
- namenode
ports:
- "8088:8088"
command: yarn --daemon start resourcemanager
nodemanager:
image: hadoop-image
depends_on:
- datanode
- resourcemanager
command: yarn --daemon start nodemanager
networks:
default:
driver: bridge
确保你有5个运行Docker的机器,每个机器上都安装Docker和docker-compose
。在每台机器上克隆你的Hadoop配置和Dockerfile,然后构建镜像并运行docker-compose up
。
注意:这个示例假设你有5个可用的Docker容器环境。在实际部署中,你可能需要调整网络设置,并确保所有容器都能够通信。
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