1 前言
笔者之前发表过一篇关于Cloudera的配置文档,感觉还算受欢迎,旧文请参阅。
2 实践部分
2.1 基本信息
Hostname=HD0[1-5].cmdschool.org
Ipaddress=10.168.0.2[4-8]
OS Version=CentOS 7.3
2.2 环境配置
2.2.1 配置IP地址
In HD01-05:
nmcli connection delete
"Wired connection 1"
nmcli connection show
nmcli device show
nmcli connection add ifname ens192 con-name ens192
type
ethernet
nmcli connection modify ens192 ipv4.address
"10.168.0.XX/24"
nmcli connection modify ens192 ipv4.gateway
"10.168.0.1"
nmcli connection modify ens192 ipv4.dns
"202.96.128.86 202.96.128.166"
nmcli connection modify ens192 ipv4.method manual
nmcli connection modify ens192 ipv6.method ignore
nmcli connection modify ens192 connection.autoconnect
yes
nmcli connection up ens192
注:第五行的“XX”部分是主机号
2.2.2 配置主机名称
In HD01-05:
hostnamectl set-hostname HDXX.sae.com.hk
注:“XX”部分是主机名称编号
2.2.3 关闭SELinux
In HD01-05:
getenforce
如果显示如下:
Enforcing
则执行:
setenforce 0
sed
-i
's/SELINUX=enforcing/SELINUX=disabled/g'
/etc/selinux/config
2.2.4 配置名称解析
In HD01-05:
echo
'10.168.0.24 hd01.cmdschool.org'
>>
/etc/hosts
echo
'10.168.0.25 hd02.cmdschool.org'
>>
/etc/hosts
echo
'10.168.0.26 hd03.cmdschool.org'
>>
/etc/hosts
echo
'10.168.0.27 hd04.cmdschool.org'
>>
/etc/hosts
echo
'10.168.0.28 hd05.cmdschool.org'
>>
/etc/hosts
2.2.5 配置时区
In HD01-05:
rm
/etc/localtime
ln
-s
/usr/share/zoneinfo/Asia/Shanghai
/etc/localtime
2.2.6 关闭防火墙并设置开机不启动
In HD01-05:
systemctl stop firewalld
systemctl disable firewalld
2.2.7 优化虚拟内存需求率
In HD01-05:
1)检查虚拟内存需求率
cat
/proc/sys/vm/swappiness
显示如下:
30
2)临时降低虚拟内存需求率
sysctl vm.swappiness=0
3)永久降低虚拟内存需求率
echo
'vm.swappiness = 0'
>
/etc/sysctl
.d
/swappiness
.conf
并运行如下命令使生效
sysctl -p
2.2.8 解决透明大页面问题
In HD01-05:
1)检查透明大页面问题
cat
/sys/kernel/mm/transparent_hugepage/defrag
如果显示为:
[always] madvise never
2)临时关闭透明大页面问题
echo
never >
/sys/kernel/mm/transparent_hugepage/defrag
确认配置生效:
cat
/sys/kernel/mm/transparent_hugepage/defrag
应该显示为:
always madvise [never]
3)配置开机自动生效
echo
'echo never > /sys/kernel/mm/transparent_hugepage/defrag'
>>
/etc/rc
.
local
chmod
+x
/etc/rc
.d
/rc
.
local
2.2.9 安装JDK
In HD01-05:
1)查询是否存在yum安装的java包
rpm -qa |
grep
java
注意:存在yum安装的rpm包可能导致Sqoop无法启动
2)安装jdk1.8
mkdir
/usr/java
cd
/usr/java
wget http:
//download
..com
/otn-pub/java/jdk/8u121-b13/e9e7ea248e2c4826b92b3f075a80e441/jdk-8u121-linux-x64
.
tar
.gz
tar
-xf jdk-8u121-linux-x64.
tar
.gz
2)配置jdk变量环境
echo
'export JAVA_HOME=/usr/java/jdk1.8.0_121'
>>
/etc/profile
echo
'export JRE_HOME=${JAVA_HOME}/jre'
>>
/etc/profile
echo
'export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib'
>>
/etc/profile
echo
'export PATH=${JAVA_HOME}/bin:$PATH'
>>
/etc/profile
3)导入java环境变量
source
/etc/profile
4)测试jdk的配置
java -version
2.3 yum源的安装配置
In HD01-05:
2.3.1 yum源配置
1)增加yum源
curl https:
//archive
.cloudera.com
/cm5//7/x86_64/cm/cloudera-manager
.repo >
/etc/yum
.repos.d
/cloudera-manager
.repo
yum
install
-y https:
//dev
.mysql.com
/get/mysql57-community-release-el7-10
.noarch.rpm
注:此出隐含条件是有系统默认的yum源并可在线更新
2)开启5.6版的源
vim
/etc/yum
.repos.d
/mysql-community
.repo
开启5.6的源并修改如下:
[mysql56-community]
name=MySQL 5.6 Community Server
baseurl=http:
//repo
.mysql.com
/yum/mysql-5
.6-community
/el/7/
$basearch/
enabled=1
gpgcheck=1
gpgkey=
file
:
///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
[mysql57-community]
name=MySQL 5.7 Community Server
baseurl=http:
//repo
.mysql.com
/yum/mysql-5
.7-community
/el/7/
$basearch/
enabled=0
gpgcheck=1
gpgkey=
file
:
///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
注:修改enabled选项等于1表示开启,0表示关闭(其他源都配置为0)
2.3.2 安装基本的工具
In HD02-05:
1)安装配置工具
yum
install
-y vim wget openssh-clients
2)安装python
yum
install
-y python
3)安装ntpd
yum
install
-y chrony
2.3.3 Cloudera Manager端yum源配置
In HD01:
1)安装Cloudera Manager包
yum
install
-y cloudera-manager-daemons cloudera-manager-server
2)安装mysql
yum
install
-y mysql-community-server mysql-community-devel mysql-community-client mysql-community-libs mysql-community-common mysql-community-libs-compat
2.3.4 Cloudera Manager Agent端yum源配置
In HD01-05:
安装Cloudera Manager Agent包
yum
install
-y cloudera-manager-agent cloudera-manager-daemons
2.4 配置前的准备配置
2.4.1权限检查(单用户模式适用,可选)
In HD01-05:
检查以下目录cloudera-scm用户具有完全的权限
检查当前目录权限:
1
|
ls
-ld
/opt/cloudera/
|
显示如下:
drwxr-xr-x. 4 cloudera-scm cloudera-scm 36 Apr 15 19:35
/opt/cloudera/
检查子目录权限:
ls
-lR
/opt/cloudera/
显示如下
/opt/cloudera/
:
total 0
drwxr-xr-x. 2 cloudera-scm cloudera-scm 6 Mar 19 23:26 csd
drwxr-xr-x. 2 cloudera-scm cloudera-scm 6 Mar 19 23:26 parcel-repo
/opt/cloudera/csd
:
total 0
/opt/cloudera/parcel-repo
:
total 0
同样,检查服务器或客户端目录权限
ls
-ld
/var/log/cloudera-scm-server/
ls
-lR
/var/log/cloudera-scm-server/
ls
-ld
/var/lib/cloudera-scm-agent/
ls
-lR
/var/lib/cloudera-scm-agent/
2.4.2 检查线程限制配置
In HD01-05:
vim
/etc/security/limits
.d
/cloudera-scm
.conf
修改配置如下:
#
# (c) Copyright 2014 Cloudera, Inc.
#
cloudera-scm soft nofile 32768
cloudera-scm soft nproc 65536
cloudera-scm hard nofile 1048576
cloudera-scm hard nproc unlimited
cloudera-scm hard memlock unlimited
cloudera-scm soft memlock unlimited
2.4.3 指定运行单用户模式的用户名(单用户模式适用,不配置)
In HD01-05:
vim
/etc/default/cloudera-scm-agent
并取消以下行的注释
USER=
"cloudera-scm"
2.4.4 创建压缩包存放目录
mkdir
-p
/opt/cloudera/parcels
chown
cloudera-scm:cloudera-scm
/opt/cloudera/parcels
2.4.5 配置无密码的sudo访问(非默认单用户模式适用,可选)
In HD01-05:
visudo
增加如下组:
%cloudera-scm ALL=(ALL) NOPASSWD: ALL
确认包含如下行:
Defaults secure_path =
/sbin
:
/bin
:
/usr/sbin
:
/usr/bin
2.4.6 配置su的limit
In HD01-05:
vim
/etc/pam
.d
/su
加入如下配置:
session required pam_limits.so
2.4.7 NTP的配置
In HD01-5:
1)确认包含如下配置:
cat
/etc/chrony
.conf
应该包含如下配置:
server 0.centos.pool.ntp.org iburst
server 1.centos.pool.ntp.org iburst
server 2.centos.pool.ntp.org iburst
server 3.centos.pool.ntp.org iburst
2)启动并配置ntpd服务自动启动
systemctl restart chronyd
systemctl
enable
chronyd
3)触发时间同步
chronyc sources
2.4.8 安装MySQL JDBC Driver
In HD01-05:
cd
~
wget http:
//dev
.mysql.com
/get/Downloads/Connector-J/mysql-connector-java-5
.1.39.
tar
.gz
tar
zxvf mysql-connector-java-5.1.39.
tar
.gz
mkdir
/usr/share/java/
cp
mysql-connector-java-5.1.39
/mysql-connector-java-5
.1.39-bin.jar
/usr/share/java/mysql-connector-java
.jar
2.4.9 配置公钥认证
In HD01:
1)生成秘钥
ssh-keygen -t rsa
注:以上一路回车
2)复制公钥到各个被登录的服务器
3)测试免密码登录
ssh
10.168.0.24
ssh
10.168.0.25
ssh
10.168.0.26
ssh
10.168.0.27
ssh
10.168.0.28
注:以上如果无需密码登记即成功