Docker-Compose搭建Spark集群的实现方法
目录
-
一、前言二、docker-compose.yml三、启动集群四、结合hdfs使用
一、前言
在前文中,我们使用Docker-Compose完成了hdfs集群的构建。本文将继续使用Docker-Compose,实现Spark集群的搭建。
二、docker-compose.yml
对于Spark集群,我们采用一个mater节点和两个worker节点进行构建。其中,所有的work节点均分配1一个core和 1GB的内存。
Docker镜像选择了bitnami/spark的开源镜像,选择的spark版本为2.4.3,docker-compose配置如下:
- master:
- image: bitnami/spark:2.4.3
- container_name: master
- user: root
- environment:
- – SPARK_MODE=master
- – SPARK_RPC_AUTHENTICATION_ENABLED=no
- – SPARK_RPC_ENCRYPTION_ENABLED=no
- – SPARK_LOCAL_STORAGE_ENCRYPTION_ENABLED=no
- – SPARK_SSL_ENABLED=no
- ports:
- – ‘8080:8080’
- – ‘7077:7077’
- volumes:
- – ./python:/python
- worker1:
- image: bitnami/spark:2.4.3
- container_name: worker1
- user: root
- environment:
- – SPARK_MODE=worker
- – SPARK_MASTER_URL=spark://master:7077
- – SPARK_WORKER_MEMORY=1G
- – SPARK_WORKER_CORES=1
- – SPARK_RPC_AUTHENTICATION_ENABLED=no
- – SPARK_RPC_ENCRYPTION_ENABLED=no
- – SPARK_LOCAL_STORAGE_ENCRYPTION_ENABLED=no
- – SPARK_SSL_ENABLED=no
- worker2:
- image: bitnami/spark:2.4.3
- container_name: worker2
- user: root
- environment:
- – SPARK_MODE=worker
- – SPARK_MASTER_URL=spark://master:7077
- – SPARK_WORKER_MEMORY=1G
- – SPARK_WORKER_CORES=1
- – SPARK_RPC_AUTHENTICATION_ENABLED=no
- – SPARK_RPC_ENCRYPTION_ENABLED=no
- – SPARK_LOCAL_STORAGE_ENCRYPTION_ENABLED=no
- – SPARK_SSL_ENABLED=no
复制代码 在master节点中,也映射了一个/python目录,用于存放pyspark代码,方便运行。
对于master节点,暴露出7077端口和8080端口分别用于连接spark以及浏览器查看spark UI,在spark UI中,集群状态如下图(启动后):
如果有需要,可以自行添加worker节点,其中可以修改SPARK_WORKER_MEMORY与SPARK_WORKER_CORES对节点分配的资源进行修改。
对于该镜像而言,默认exec进去是无用户的,会导致一些安装命令权限的不足,无法安装。例如需要运行pyspark,可能需要安装numpy、pandas等库,就无法使用pip完成安装。而通过user: root就能设置默认用户为root用户,避免上述问题。
三、启动集群
同上文一样,在docker-compose.yml的目录下执行docker-compose up -d命令,就能一键构建集群(但是如果需要用到numpy等库,还是需要自己到各节点内进行安装)。
进入master节点执行spark-shell,成功进入:
四、结合hdfs使用
将上文的Hadoop的docker-compose.yml与本次的结合,得到新的docker-compose.yml:
- version: “1.0”
- services:
- namenode:
- image: bde2022/hadoop-namenode:2.0.0-hadoop3.2.1-java8
- container_name: namenode
- ports:
- – 9870:9870
- – 9000:9000
- volumes:
- – ./hadoop/dfs/name:/hadoop/dfs/name
- – ./input:/input
- environment:
- – CLUSTER_NAME=test
- env_file:
- – ./hadoop.env
- datanode:
- image: bde2022/hadoop-datanode:2.0.0-hadoop3.2.1-java8
- container_name: datanode
- depends_on:
- – namenode
- volumes:
- – ./hadoop/dfs/data:/hadoop/dfs/data
- environment:
- SERVICE_PRECONDITION: “namenode:9870”
- env_file:
- – ./hadoop.env
- resourcemanager:
- image: bde2022/hadoop-resourcemanager:2.0.0-hadoop3.2.1-java8
- container_name: resourcemanager
- environment:
- SERVICE_PRECONDITION: “namenode:9000 namenode:9870 datanode:9864”
- env_file:
- – ./hadoop.env
- nodemanager1:
- image: bde2022/hadoop-nodemanager:2.0.0-hadoop3.2.1-java8
- container_name: nodemanager
- environment:
- SERVICE_PRECONDITION: “namenode:9000 namenode:9870 datanode:9864 resourcemanager:8088”
- env_file:
- – ./hadoop.env
- historyserver:
- image: bde2022/hadoop-historyserver:2.0.0-hadoop3.2.1-java8
- container_name: historyserver
- environment:
- SERVICE_PRECONDITION: “namenode:9000 namenode:9870 datanode:9864 resourcemanager:8088”
- volumes:
- – ./hadoop/yarn/timeline:/hadoop/yarn/timeline
- env_file:
- – ./hadoop.env
- master:
- image: bitnami/spark:2.4.3-debian-9-r81
- container_name: master
- user: root
- environment:
- – SPARK_MODE=master
- – SPARK_RPC_AUTHENTICATION_ENABLED=no
- – SPARK_RPC_ENCRYPTION_ENABLED=no
- – SPARK_LOCAL_STORAGE_ENCRYPTION_ENABLED=no
- – SPARK_SSL_ENABLED=no
- ports:
- – ‘8080:8080’
- – ‘7077:7077’
- volumes:
- – ./python:/python
- worker1:
- image: bitnami/spark:2.4.3-debian-9-r81
- container_name: worker1
- user: root
- environment:
- – SPARK_MODE=worker
- – SPARK_MASTER_URL=spark://master:7077
- – SPARK_WORKER_MEMORY=1G
- – SPARK_WORKER_CORES=1
- – SPARK_RPC_AUTHENTICATION_ENABLED=no
- – SPARK_RPC_ENCRYPTION_ENABLED=no
- – SPARK_LOCAL_STORAGE_ENCRYPTION_ENABLED=no
- – SPARK_SSL_ENABLED=no
- worker2:
- image: bitnami/spark:2.4.3-debian-9-r81
- container_name: worker2
- user: root
- environment:
- – SPARK_MODE=worker
- – SPARK_MASTER_URL=spark://master:7077
- – SPARK_WORKER_MEMORY=1G
- – SPARK_WORKER_CORES=1
- – SPARK_RPC_AUTHENTICATION_ENABLED=no
- – SPARK_RPC_ENCRYPTION_ENABLED=no
- – SPARK_LOCAL_STORAGE_ENCRYPTION_ENABLED=no
- – SPARK_SSL_ENABLED=no
复制代码 运行集群(还需要一个hadoop.env文件见上文)长这样:
通过Docker容器的映射功能,将本地文件与spark集群的master节点的/python进行了文件映射,编写的pyspark通过映射可与容器中进行同步,并通过docker exec指令,完成代码执行:
运行了一个回归程序,集群功能正常:
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