系统：centos7
数据库版本：Percona-Server-8
安装包：二进制包

系统优化：

• 关闭selinux

setenforce 0
sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config

• 关闭防火墙

systemctl stop firewalld
systemctl disable firewalld

• 安装依赖包

yum -y install libevent

• sysctl.conf 优化：

cat >> /etc/sysctl.conf << EOF
fs.aio-max-nr = 1048576
fs.file-max = 681574400
kernel.shmmax = 137438953472
kernel.shmmni = 4096
kernel.sem = 250 32000 100 200
net.ipv4.ip_local_port_range = 9000 65000
net.core.rmem_default = 262144
net.core.rmem_max = 4194304
net.core.wmem_default = 262144
net.core.wmem_max = 1048586
EOFsysctl -p

• limit 优化：

cat >> /etc/security/limits.conf << EOF
* soft nproc 65536
* hard nproc 65536
* soft nofile 65536
* hard nofile 65536
EOFcat >> /etc/security/limits.d/20-nproc.conf << EOF
* soft nproc unlimited
* hard nproc unlimited
EOFcat >> /etc/pam.d/login << EOF
session required /lib/security/pam_limits.so
session required pam_limits.so
EOFcat >> /etc/profile << EOF
ulimit -HSn 65535
EOFsource /etc/profile

安装mysql8

• 新建系统用户及创建所需文件夹

useradd -M mysql -s /sbin/nologinmkdir -p /data/mysql/{data,log} /usr/local/mysql/etc
chown -R mysql:mysql /data/mysql

• 下载mysql8安装包

wget https://www.percona.com/downloads/Percona-Server-LATEST/Percona-Server-8.0.15-5/binary/tarball/Percona-Server-8.0.15-5-Linux.x86_64.ssl101.tar.gz

• 安装

tar zxvf Percona-Server-8.0.15-5-Linux.x86_64.ssl101.tar.gz
mv Percona-Server-8.0.15-5-Linux.x86_64.ssl101/* /usr/local/mysql/
ln -s /usr/local/mysql /usr/local/Percona-Server-8.0.15-5-Linux.x86_64.ssl101
cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld
sed -i 's|conf\=/etc/my.cnf|conf\=/usr/local/mysql/etc/my.cnf|g' /etc/init.d/mysqld
sed -i "s|^mysqld_pid_file_path=.*$|mysqld_pid_file_path='/data/mysql/mysql.pid'|g" /etc/init.d/mysqld
chmod +x /etc/init.d/mysqld
ln -s /usr/local/mysql/bin/mysql /usr/sbin/

• 修改配置

cat > /etc/my.cnf << EOF
[client]
port = 3306
socket = /tmp/mysql.sock[mysql]
prompt=\\u@\\d \\R:\\m>
auto_rehash[mysqldump]
quick
max_allowed_packet = 16M[mysqld]
user = mysql
port = 3306
wait_timeout = 31536000
interactive_timeout = 31536000basedir = /usr/local/mysql
socket = /tmp/mysql.sock
pid_file = /data/mysql/mysql.pid
datadir = /data/mysql/data
log_bin = /data/mysql/data/binskip_name_resolve
skip_external_locking
default_storage_engine = InnoDBslow_query_log = 1
long_query_time = 3
slow_query_log_file = /data/mysql/log/slow.log
log_error = /data/mysql/log/mysql_error.log
relay_log = /data/mysql/log/slave-relay.logserver_id = 8
gtid_mode = on
enforce_gtid_consistency = 1
EOF

cat > /usr/local/mysql/etc/my.cnf << EOF
[client]
port = 3306
socket = /tmp/mysql.sock[mysql]
prompt=\\u@\\d \\R:\\m>
auto_rehash[mysqldump]
quick
max_allowed_packet = 64M[mysqld]
user = mysql
server_id = 8
port = 3306wait_timeout = 31536000
interactive_timeout = 31536000
socket = /tmp/mysql.sock
explicit_defaults_for_timestamp = 1
basedir = /usr/local/mysql
datadir = /data/mysql/data
pid_file = /data/mysql/mysql.pidperformance_schema = 0
log_bin_trust_function_creators = 1
lower_case_table_names = 1
init_connect = 'SET NAMES utf8mb4'
#character_set_server = utf8mb4skip_name_resolve
skip_external_lockingmax_connections = 4000
max_connect_errors = 10000
open_files_limit = 65535
max_allowed_packet = 64M
binlog_cache_size = 64K
max_heap_table_size = 16M
tmp_table_size = 16M
read_buffer_size = 128K
read_rnd_buffer_size = 256K
sort_buffer_size = 256K
join_buffer_size = 256K
key_buffer_size = 8M
thread_cache_size = 9####binlog
log_bin = /data/mysql/data/bin
binlog_format = row
log_slave_updates = 1
sync_binlog = 1
expire_logs_days = 5
binlog_checksum = CRC32
slave_allow_batching = 1
master_verify_checksum = 1
slave_sql_verify_checksum = 1
master_info_repository = table
relay_log_info_repository = table
relay_log_purge = 1
relay_log_recovery = 1
relay_log = /data/mysql/log/slave-relay.log
binlog_row_image = minimal
binlog_rows_query_log_events = 1####other logs
long_query_time = 3
slow_query_log = 1
slow_query_log_file = /data/mysql/log/slow.log
log_error = /data/mysql/log/mysql_error.log####master&slave
gtid_mode = on
enforce_gtid_consistency = 1####innodb
default_storage_engine = InnoDB
innodb_open_files = 4000
innodb_buffer_pool_size = 128m
innodb_purge_threads = 4
innodb_flush_log_at_trx_commit = 2
innodb_log_buffer_size = 16M
innodb_log_files_in_group = 3
innodb_log_file_size = 48M
innodb_flush_method = O_DIRECT
innodb_data_file_path = ibdata1:12M:autoextend
innodb_file_per_table = 1
EOF

• 初始化

/usr/local/mysql/bin/mysqld --initialize-insecure

• 启动、关闭mysql

/usr/local/mysql/bin/mysqld_safe --defaults-file=/usr/local/mysql/etc/my.cnf &
service mysqld stop

• 登录服务器并增加用户

/usr/local/mysql/bin/mysql -S /tmp/mysql.sock> ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';
> CREATE USER 'root'@'%' IDENTIFIED BY '123456';
> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' WITH GRANT OPTION;
> FLUSH PRIVILEGES;

• 修改mysql启动文件并设置开机启动

echo '/usr/local/mysql/bin/mysqld_safe --defaults-file=/usr/local/mysql/etc/my.cnf &' >> /etc/rc.d/rc.local