【Spark】环境搭建（CentOS7）

1. 首先要安装java8，参考

【Linux】Linux服务器（centos7）环境搭建java/python3/nginx

2. 然后安装scala

首先下载scala， 解压，然后

vim /etc/profile

在文件末尾添加， 把路径换成自己的解压路径

export PATH=$PATH:/usr/local/scala-2.12.6/bin

然后加载新的环境变量并检查是否安装成功

source /etc/profile
[root@localhost local]# scala -version
Scala code runner version 2.12.6 -- Copyright 2002-2018, LAMP/EPFL and Lightbend, Inc.
[root@localhost local]# 

3.下载spark，解压

在刚才那个环境变量配置文件 /etc/profile 中添加

export SPARK_HOME=/usr/local/spark-2.3.1-bin-hadoop2.7
export PATH=$SPARK_HOME/bin:$PATH

然后source加载， 到安装目录的bin目录下启动

[root@localhost local]# cd /usr/local/spark-2.3.1-bin-hadoop2.7/bin
[root@localhost bin]# ./spark-shell
2018-09-13 21:40:51 WARN  Utils:66 - Your hostname, localhost.localdomain resolves to a loopback address: 127.0.0.1; using 192.168.0.150 instead (on interface ens33)
2018-09-13 21:40:51 WARN  Utils:66 - Set SPARK_LOCAL_IP if you need to bind to another address
2018-09-13 21:40:51 WARN  NativeCodeLoader:62 - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Setting default log level to "WARN".
To adjust logging level use sc.setLogLevel(newLevel). For SparkR, use setLogLevel(newLevel).
2018-09-13 21:40:58 WARN  Utils:66 - Service 'SparkUI' could not bind on port 4040. Attempting port 4041.
Spark context Web UI available at http://192.168.0.150:4041
Spark context available as 'sc' (master = local[*], app id = local-1536846059114).
Spark session available as 'spark'.
Welcome to
      ____              __
     / __/__  ___ _____/ /__
    _ / _ / _ `/ __/  '_/
   /___/ .__/\_,_/_/ /_/\_   version 2.3.1
      /_/
         
Using Scala version 2.11.8 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_181)
Type in expressions to have them evaluated.
Type :help for more information.

scala> 

 4. 克隆3个虚拟机，并把4个虚拟机的ip固定，参考：【Linux】CentOS操作和问题汇总

　　这样我们一共就有4个虚拟机用于搭建集群

5. 修改主机名， 查看主机名

[root@localhost ~]# hostname
localhost.localdomain

或者

[root@localhost ~]# hostnamectl
   Static hostname: localhost.localdomain
         Icon name: computer-vm
           Chassis: vm
        Machine ID: e44f84b669ba4711b250a7cd48d7c30f
           Boot ID: 7eeae3e7a7d549ccb2480523f0b887b8
    Virtualization: vmware
  Operating System: CentOS Linux 7 (Core)
       CPE OS Name: cpe:/o:centos:centos:7
            Kernel: Linux 3.10.0-862.el7.x86_64
      Architecture: x86-64

修改主机名并重启虚拟机

[root@localhost ~]# hostnamectl set-hostname Spark00
[root@localhost ~]# reboot

重连后 @localhost变成了 @Spark00

Last login: Sat Sep 15 12:05:22 2018 from 192.168.0.104
[root@spark00 ~]# 

同样的方法把另外三台分别改称spark01, spark02, spark03, 如下

XShell命名改成一样的便于管理

集群角色安排