linux高级的脚本,linux内核高级优化脚本

linux内核高级优化脚本

可以用于hadoop生态圈环境的组件安装 linux内核调优

具体的每一步的解释请参考 03搭建cdh

备注&＃xff1a;使用与centos6和centos7两个系统版本执行

[root&＃64;lb01 scripts]# pwd

/opt/scripts

[root&＃64;lb01 scripts]# ll

total 12

-rw-r--r-- 1 root root 3837 Apr 22 14:34 adlinuxopt.sh

-rw-r--r-- 1 root root 7215 Apr 22 13:32 initialization.sh

[root&＃64;lb01 scripts]# cat adlinuxopt.sh

#!/bin/bash

#adlinuxopt scripts

#author majihui

#date 20190422

#by Advanced linux optimization for hadoop

echo "在执行此脚本之前需要先执行 initialization.sh 等待5s确认"

echo "若没执行请 ctrl&＃43;c 退出执行"

sleep 1

echo "1S"

sleep 2

echo "2S"

sleep 3

echo "3S"

sleep 4

echo "4S"

sleep 5

echo "5S"

if [ ! -d "/opt/scripts" ]; then

mkdir -p /opt/scripts

fi

echo "等待1s:#1/判断centos7还是centos6系统"

sleep 1

VERSION&＃61;&＃96;cat /etc/redhat-release|awk -F " " &＃39;{print $3}&＃39;|awk -F "." &＃39;{print $1}&＃39;&＃96;

if [ "$VERSION" &＃61;&＃61; "6" ];then

VERSION&＃61;&＃39;6&＃39;

echo "centos6"

else

VERSION&＃61;&＃39;7&＃39;

echo "centos7"

fi

echo "-----------------------------华丽分隔符----------------------------------------"

echo "#2/调整Linux磁盘缓存和性能"

if [ "&＃96;egrep "vm.dirty_background_ratio &＃61; 5" /etc/sysctl.conf|wc -l&＃96;" &＃61;&＃61; "0" ];then

echo "vm.dirty_background_ratio &＃61; 5" >> /etc/sysctl.conf

else

echo "Linux磁盘缓存和性能 vm.dirty_background_ratio 设置成功或者之前已经设置过了"

fi

if [ "&＃96;egrep "vm.dirty_ratio &＃61; 10" /etc/sysctl.conf|wc -l&＃96;" &＃61;&＃61; "0" ];then

echo "vm.dirty_ratio &＃61; 10" >> /etc/sysctl.conf

sysctl -p

else

echo "Linux磁盘缓存和性能 vm.dirty_ratio设置成功或者之前已经设置过了"

fi

echo "-----------------------------华丽分隔符----------------------------------------"

echo "#3/是否禁用ipv6"

echo "等待3秒:"

sleep 3

cat <

**********************

1.[disable ipv6]

2.[no disable ipv6]

3.[exit]

pls input the num you want:

**********************

EOF

read -t 30 -p "pls input the num you want:" a

[ -n "&＃96;echo $a|sed &＃39;s#[0-9]##g&＃39;&＃96;" ] && {

echo "Input error"

exit 1

}

iffuncation(){

if [ $a -eq 1 ];then

echo "disable ipv6"

echo "等待3S"

sleep 3

if [ "&＃96;egrep "net.ipv6.conf.all.disable_ipv6&＃61;1" /etc/sysctl.conf|wc -l&＃96;" &＃61;&＃61; "0" ];then

echo "net.ipv6.conf.all.disable_ipv6&＃61;1" >> /etc/sysctl.conf

fi

if [ "&＃96;egrep "NETWORKING_IPV6&＃61;no" /etc/sysconfig/network|wc -l&＃96;" &＃61;&＃61; "0" ];then

echo "NETWORKING_IPV6&＃61;no" >> /etc/sysconfig/network

fi

pathnetwork&＃61;&＃96;ls /etc/sysconfig/network-scripts/ifcfg-e*&＃96;

echo NETWORKING_IPV6&＃61;no >> $pathnetwork

sysctl -p

echo "等待3S"

sleep 3

elif [ $a -eq 2 ];then

echo "no disable ipv6"

elif [ $a -eq 3 ];then

exit 1

else

echo "Input error"

exit 1

fi

}

iffuncation

echo "-----------------------------华丽分隔符----------------------------------------"

echo "#4/socket读写缓冲区调优"

if [ "&＃96;egrep "net.core.wmem_default&＃61;256960" /etc/sysctl.conf|wc -l&＃96;" &＃61;&＃61; "0" ];then

echo "net.core.wmem_default&＃61;256960" >> /etc/sysctl.conf

fi

if [ "&＃96;egrep "net.core.rmem_default&＃61;256960" /etc/sysctl.conf|wc -l&＃96;" &＃61;&＃61; "0" ];then

echo "net.core.rmem_default&＃61;256960" >> /etc/sysctl.conf

fi

if [ "&＃96;egrep "net.core.wmem_max&＃61;2097152" /etc/sysctl.conf|wc -l&＃96;" &＃61;&＃61; "0" ];then

echo "net.core.wmem_max&＃61;2097152" >> /etc/sysctl.conf

fi

if [ "&＃96;egrep "net.core.rmem_max&＃61;2097152" /etc/sysctl.conf|wc -l&＃96;" &＃61;&＃61; "0" ];then

echo "net.core.rmem_max&＃61;2097152" >> /etc/sysctl.conf

fi

if [ "&＃96;egrep "net.ipv4.tcp_wmem&＃61;8760 256960 4088000" /etc/sysctl.conf|wc -l&＃96;" &＃61;&＃61; "0" ];then

echo "net.ipv4.tcp_wmem&＃61;8760 256960 4088000" >> /etc/sysctl.conf

fi

if [ "&＃96;egrep "net.ipv4.tcp_rmem&＃61;8760 256960 4088000" /etc/sysctl.conf|wc -l&＃96;" &＃61;&＃61; "0" ];then

echo "net.ipv4.tcp_rmem&＃61;8760 256960 4088000" >> /etc/sysctl.conf

sysctl -p

else

echo "socket读写缓冲区调优 设置成功或者之前已经设置过了"

fi

echo "-----------------------------华丽分隔符----------------------------------------"

echo "#5/预读缓冲调优"

DF&＃61;&＃96;df |sed -n 2p |awk &＃39;{print $1}&＃39;&＃96;

blockdev --setra 8192 $DF

blockdev --getra $DF

执行结果如下

[root&＃64;lb01 scripts]# sh adlinuxopt.sh

在执行此脚本之前需要先执行 initialization.sh 等待5s确认

若没执行请 ctrl&＃43;c 退出执行

1S

2S

3S

4S

5S

等待1s:#1/判断centos7还是centos6系统

centos6

-----------------------------华丽分隔符----------------------------------------

#2/调整Linux磁盘缓存和性能

Linux磁盘缓存和性能 vm.dirty_background_ratio 设置成功或者之前已经设置过了

Linux磁盘缓存和性能 vm.dirty_ratio设置成功或者之前已经设置过了

-----------------------------华丽分隔符----------------------------------------

#3/是否禁用ipv6

等待3秒:

**********************

1.[disable ipv6]

2.[no disable ipv6]

3.[exit]

pls input the num you want:

**********************

pls input the num you want:1

disable ipv6

等待3S

net.ipv4.ip_forward &＃61; 0

net.ipv4.conf.default.rp_filter &＃61; 1

net.ipv4.conf.default.accept_source_route &＃61; 0

kernel.sysrq &＃61; 0

kernel.core_uses_pid &＃61; 1

net.ipv4.tcp_synCOOKIEs &＃61; 1

error: "net.bridge.bridge-nf-call-ip6tables" is an unknown key

error: "net.bridge.bridge-nf-call-iptables" is an unknown key

error: "net.bridge.bridge-nf-call-arptables" is an unknown key

kernel.msgmnb &＃61; 65536

kernel.msgmax &＃61; 65536

kernel.shmmax &＃61; 68719476736

kernel.shmall &＃61; 4294967296

vm.swappiness &＃61; 1

vm.dirty_background_ratio &＃61; 5

vm.dirty_ratio &＃61; 10

net.ipv6.conf.all.disable_ipv6 &＃61; 1

net.core.wmem_default &＃61; 256960

net.core.rmem_default &＃61; 256960

net.core.wmem_max &＃61; 2097152

net.core.rmem_max &＃61; 2097152

net.ipv4.tcp_wmem &＃61; 8760 256960 4088000

net.ipv4.tcp_rmem &＃61; 8760 256960 4088000

等待3S

-----------------------------华丽分隔符----------------------------------------

#4/socket读写缓冲区调优

socket读写缓冲区调优 设置成功或者之前已经设置过了

-----------------------------华丽分隔符----------------------------------------

#5/预读缓冲调优

8192

参考链接为&＃xff1a;03搭建cdh 生产环境前的Linux 优化(涉及到Linux内存参数优化)

https://blog.51cto.com/12445535/2365948