#!/bin/bash
#
echo "vm.swappiness = 0">> /etc/sysctl.conf
swapoff -a && swapon -a
sysctl -p
systemctl stop firewalld.service
systemctl disable firewalld.service
yum install -y ntp ntpdate
/usr/sbin/ntpdate ntp.aliyun.com
echo never > /sys/kernel/mm/transparent_hugepage/enabled
echo never > /sys/kernel/mm/transparent_hugepage/defrag
echo "noop" > /sys/block/sda/queue/scheduler
cat /sys/kernel/mm/transparent_hugepage/enabled
cat /sys/block/sda/queue/scheduler
mkdir /etc/tuned/balanced-tidb-optimal/
touch /etc/tuned/balanced-tidb-optimal/tuned.conf
cat << EOF >> touch /etc/tuned/balanced-tidb-optimal/tuned.conf
[main]
include=balanced
[cpu]
governor=performance
[vm]
transparent_hugepages=never
[disk]
devices_udev_regex=(ID_SERIAL=36d0946606d79f90025f3e09a0c1fc035)|(ID_SERIAL=36d0946606d79f90025f3e09a0c1f9e81)
elevator=noop
EOF
tuned-adm profile balanced-tidb-optimal
echo "fs.file-max = 1000000">> /etc/sysctl.conf
echo "net.core.somaxconn = 32768">> /etc/sysctl.conf
echo "net.ipv4.tcp_tw_recycle = 0">> /etc/sysctl.conf
echo "net.ipv4.tcp_syncookies = 0">> /etc/sysctl.conf
echo "vm.overcommit_memory = 1">> /etc/sysctl.conf
echo "vm.swappiness = 0">> /etc/sysctl.conf
sysctl -p
cat << EOF >>/etc/security/limits.conf
tidb soft nofile 1000000
tidb hard nofile 1000000
tidb soft stack 32768
tidb hard stack 32768
EOF
useradd tidb && \
passwd tidb <<EOF
123
123
EOF
cat << EOF >> /etc/sudoers
tidb ALL=(ALL) NOPASSWD: ALL
EOF
yum -y install numactl
=================================================================
ssh-keygen -t rsa
ssh-copy-id -i ~/.ssh/id_rsa.pub 192.168.1.xxx
ssh-copy-id -i ~/.ssh/id_rsa.pub 192.168.1.yyy