1、内核优化
代码语言：javascript复制ECHOSTR='net.ipv4.tcp_fin_timeout = 2
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_keepalive_time =600
net.ipv4.ip_local_port_range = 4000 65000
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.tcp_max_tw_buckets = 36000
net.ipv4.route.gc_timeout = 100
net.ipv4.tcp_syn_retries = 1
net.ipv4.tcp_synack_retries = 1
net.core.somaxconn = 16384
net.core.netdev_max_backlog = 16384
net.ipv4.tcp_max_orphans = 16384
net.nf_conntrack_max = 25000000
net.netfilter.nf_conntrack_max = 25000000
net.netfilter.nf_conntrack_tcp_timeout_established = 180
net.netfilter.nf_conntrack_tcp_timeout_time_wait = 120
net.netfilter.nf_conntrack_tcp_timeout_close_wait = 60
net.netfilter.nf_conntrack_tcp_timeout_fin_wait = 120'
echo "$ECHOSTR" >> /etc/sysctl.conf &&
modprobe ip_conntrack && modprobe bridge
echo "modprobe ip_conntrack" >> /etc/rc.local
echo "modprobe bridge" >> /etc/rc.local
/sbin/sysctl -p2、文件描述符
代码语言：javascript复制/etc/security/limits.conf
* hard nofile 65535
* soft nofile 65535
* hard noproc 65535
* soft noproc 655353、更新yum源，安装epel源
代码语言：javascript复制vi /etc/yum.repo.d/CentOS-Base.repo 略
yum install epel-release -y4、系统时钟同步
代码语言：javascript复制yum install chrony -y
systemctl start chronyd
systemctl enable chronyd关闭SELinux和防火墙
代码语言：javascript复制if [ -f /etc/selinux/config ]; then
sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/selinux/config
setenforce 0
fi
systemctl stop firewalld
systemctl disable firewalld调整系统字符集
代码语言：javascript复制echo 'export LC_ALL=C'>> /etc/profile
echo 'export LANG=en_US.UTF-8' >> /etc/profile
source /etc/profile安装基础工具
代码语言：javascript复制yum install wget net-tools telnet tree nmap sysstat lrzsz dos2unix -y
