Kafka Docker集群搭建

1. Zookeeper下载

http://apache.org/dist/zookeeper/

http://mirrors.hust.edu.cn/apache/zookeeper/zookeeper-3.4.9/zookeeper-3.4.9.tar.gz

2.Kafka下载

http://apache.org/dist/kafka/
http://mirror.bit.edu.cn/apache/kafka/0.10.0.0/kafka_2.10-0.10.0.0.tgz

3,Zookeeper的Docker镜像制作

• 可以直接使用Zookeeper镜像

  docker pull zookeeper

• 也可以自己使用Dockerfile制作

  #基础镜像使用java，这样可以免于设置java环境
  FROM java
  
  #作者
  MAINTAINER Bonker <bonker@foxmail.com>
  
  #定义工作目录
  ENV WORK_PATH /opt/zkcluster/zkconf
  
  #定义zookeeper文件夹名称
  ENV ZOOKEEPER_PACKAGE_NAME zookeeper-3.4.9
  
  #创建工作目录
  RUN mkdir -p $WORK_PATH
  
  #把zookeeper压缩文件复制到工作目录
  COPY ./$ZOOKEEPER_PACKAGE_NAME.tar.gz $WORK_PATH/
  
  #解压缩
  RUN tar -xvf $WORK_PATH/$ZOOKEEPER_PACKAGE_NAME.tar.gz -C $WORK_PATH/
  
  #删除压缩文件
  RUN rm $WORK_PATH/$ZOOKEEPER_PACKAGE_NAME.tar.gz
  
  #给shell赋予执行权限
  RUN chmod a+x $WORK_PATH/$ZOOKEEPER_PACKAGE_NAME/bin/zkServer.sh
  
  RUN mv $WORK_PATH/$ZOOKEEPER_PACKAGE_NAME/conf/zoo_sample.cfg $WORK_PATH/$ZOOKEEPER_PACKAGE_NAME/conf/zoo.cfg
  
  ENTRYPOINT  $WORK_PATH/$ZOOKEEPER_PACKAGE_NAME/bin/zkServer.sh start-foreground
  #ENTRYPOINT  ["/bin/sh -c",$WORK_PATH/$ZOOKEEPER_PACKAGE_NAME/bin/zkServer.sh]
  #CMD [start-foreground]

• 构建zookeeper

  docker build -t bonker/zookeeper:3.4.9 .

• 运行docker

  docker run -d -p 2181:2181 --name zookeeper3.4.9 bonker/zookeeper:3.4.9

4,Kafka的Docker镜像制作

• 编写执行脚本kafkaStart.sh

  sed -i "s/broker.id=0/broker.id=$BROKER_ID/g" $WORK_PATH/$KAFKA_PACKAGE_NAME/config/server.properties
  $WORK_PATH/$KAFKA_PACKAGE_NAME/bin/kafka-server-start.sh $WORK_PATH/$KAFKA_PACKAGE_NAME/config/server.properties

• 编写Dockerfile

  #基础镜像使用java，这样可以免于设置java环境
  FROM java
  
  #作者
  MAINTAINER Bonker <bonker@foxmail.com>
  
  #定义工作目录
  ENV WORK_PATH /usr/local/work
  
  #定义kafka文件夹名称
  ENV KAFKA_PACKAGE_NAME kafka_2.10-0.10.0.0
  
  #创建工作目录
  RUN mkdir -p $WORK_PATH
  
  #把kafka压缩文件复制到工作目录
  COPY ./$KAFKA_PACKAGE_NAME.tgz $WORK_PATH/
  
  #把kafka执行脚本复制到工作目录
  COPY ./kafkaStart.sh $WORK_PATH/
  
  #给shell赋予执行权限
  RUN chmod a+x $WORK_PATH/kafkaStart.sh
  
  #解压缩
  RUN tar -xvf $WORK_PATH/$KAFKA_PACKAGE_NAME.tgz -C $WORK_PATH/
  
  #删除压缩文件
  RUN rm $WORK_PATH/$KAFKA_PACKAGE_NAME.tgz
  
  #执行sed命令修改文件，将连接zk的ip改为link参数对应的zookeeper容器的别名
  RUN sed -i 's/zookeeper.connect=localhost:2181/zookeeper.connect=zkhost:2181/g' $WORK_PATH/$KAFKA_PACKAGE_NAME/config/server.properties
  
  #执行sed命令修改文件，改变brokerId
  #RUN sed -i "s/broker.id=0/broker.id=$BROKER_ID/g" $WORK_PATH/$KAFKA_PACKAGE_NAME/config/server.properties
  
  #CMD $WORK_PATH/$KAFKA_PACKAGE_NAME/bin/kafka-server-start.sh $WORK_PATH/$KAFKA_PACKAGE_NAME/config/server.properties
  CMD $WORK_PATH/kafkaStart.sh

• 构建kafka

  docker build -t bonker/kafka:2.10-0.10.0.0 .

5,安装docker-compose

1. 安装python-pip

   yum -y install epel-release
   yum -y install python-pip

2. 安装docker-compose

   pip install docker-compose
   待安装完成后，执行查询版本的命令，即可安装docker-compose
   docker-compose version

6,运行Dokcer容器

• 编写docker-compose.yml

version: '2'
services: 
  zk_server: 
    image: bonker/zookeeper:3.4.9
    restart: always
  kafka_server: 
    image: bonker/kafka:2.10-0.10.0.0
    ports: 
      - "9091:9092"
    environment: 
     BROKER_ID: 1
    links: 
      - zk_server:zkhost
    restart: always
  message_producer: 
    image: bonker/kafka:2.10-0.10.0.0
    ports: 
      - "9092:9092"
    environment: 
     BROKER_ID: 2
    links: 
      - zk_server:zkhost
    restart: always
  message_consumer: 
    image: bonker/kafka:2.10-0.10.0.0
    ports: 
      - "9093:9092"
    environment: 
     BROKER_ID: 3
    links: 
      - zk_server:zkhost
    restart: always

• 启动容器

现在打开终端，在docker-compose.yml所在目录下执行docker-compose up -d，即可启动所有容器