脚本里面没有把同步时间写进去，这个写在最前面
yum install -y ntp ntpdate
cp -f /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
执行下列语句之前，请详细了解ntp和ntpdate的区别，由于我这里是测试环境，所以ntpdate并无问题，正式环境请慎用ntpdate
（ntp是逐渐校正时间，ntpdate是跳跃式的直接修改时间，可能会对应用造成不良影响）
（另外，在虚拟机上测试时，ntpd不是太明显）
service ntpdate start
/sbin/chkconfig --add ntpd
/sbin/chkconfig --level 234 ntpd on
在阿里CentOS7环境下，会存在缺少libaio.so.1的报错
yum install -y libaio
脚本正文
#!/bin/bash
# FlyDido
# V1.0 2018.6.4
# 部署MySQL5.7，请提前为数据存储路径"/data"划分好空间
# V1.1 2018.9.11
# 将V1.0版本的固定下载部署5.7.22版本更新为自动识别5.7最新版本
#关闭SeLinux
sed -i 's/enforcing/disabled/g' /etc/sysconfig/selinux
setenforce 0
#用户及路径创建
groupadd mysql
useradd -g mysql -s /sbin/nologin -d /usr/local/mysql -MN mysql
mkdir /data/mysql/mysql3306/{data,tmp,logs} -p
mkdir /opt/mysql -p
#部署前置环境
yum install -y numactl vim wget &> /tmp/install.log &&
#获取mysql5.7官网最新版本号
wget https://dev.mysql.com/downloads/mysql/5.7.html#downloads &>> /tmp/install.log &&
#将新版本号写入变量
#注意这里是截取的277行的版本号，但是5.7.html有时候会有变化，所以如果更新之后版本号不在277行需要修改成对应的行号
M=`cat 5.7.html |grep '<h1>MySQL Community Server'|awk '{print $4}'`
echo -e "当前版本号为$M\n"
N=mysql-$M-linux-glibc2.12-x86_64
#删除wget下来的网页文件
rm -rf 5.7.html
#开始下载MySQL，如果下载失败，请检查官网版本是否为脚本中版本
echo -e "开始下载$M\n如果下载失败，请登陆：https://dev.mysql.com/downloads/mysql/5.7.html#download确认当前可用版本\n并手动将脚本中第39行的M值改写成可下载版本的版本号(格式范例:5.7.23)"
echo -e "3\n"
sleep 1
echo -e "2\n"
sleep 1
echo -e "1\n"
sleep 1
echo -e "Ready,Go!\n"
sleep 1
cd /opt/mysql
wget https://dev.mysql.com/get/Downloads/MySQL-5.7/$N.tar.gz
#下载情况判定
if [ $? == 0 ];then
echo -e "下载完成\n正在解压\n..."
else
echo -e "下载失败，请检查版本\n或者是检查脚本中的那句cat 5.7.html |sed -n 277p...，确定版本号是否在277行，并修改成相应的行号\n"
exit 1
fi
tar -xf $N.tar.gz
echo -e "解压完成\n"
#制作软链接
ln -s /opt/mysql/$N /usr/local/mysql
#更改权限
chown -R mysql.mysql /data
chown -R mysql.mysql /opt/mysql
chown -R mysql.mysql /usr/local/mysql
#定义server-id相关因子
echo -e "开始定义server-id\n请确认当前IP是否使用eth0，如果不是请将脚本中IP变量定义中的eth0改成当前使用的网卡\n确认端口是否为3306，如果不是请将变量PORT定义的3306改成需要的端口"
IP=`ip addr show|grep eth0|grep inet|awk '{print $2}'|awk -F '/' '{print $1}'|awk -F '.' '{print $4}'`
PORT=3306
echo -e "server-id生成完成，server-id为：$IP$PORT\n"
#生成cnf
echo -e "正在/data/mysql/mysql3306/下生成本次初始化使用的cnf\n"
cat << EOF > /data/mysql/mysql3306/my3306.cnf
[client]
port = 3306
socket = /tmp/mysql3306.sock
[mysql]
prompt="\\u@\\h [\\d]>"
#pager="less -i -n -S"
#tee=/opt/mysql/query.log
no-auto-rehash
[mysqld]
#misc
user = mysql
basedir = /usr/local/mysql
datadir = /data/mysql/mysql3306/data
port = 3306
socket = /tmp/mysql3306.sock
event_scheduler = 0
tmpdir = /data/mysql/mysql3306/tmp
#timeout
interactive_timeout = 300
wait_timeout = 300
#character set
character-set-server = utf8
open_files_limit = 65535
max_connections = 100
max_connect_errors = 100000
max_allowed_packet=1073741824
lower_case_table_names =1
#
explicit_defaults_for_timestamp=1
#symi replication
#rpl_semi_sync_master_enabled=1
#rpl_semi_sync_master_timeout=1000 # 1 second
#rpl_semi_sync_slave_enabled=1
#logs
log-output=file
slow_query_log = 1
slow_query_log_file = slow.log
log-error = error.log
pid-file = mysql.pid
long_query_time = 1
#log-slow-admin-statements = 1
#log-queries-not-using-indexes = 1
log-slow-slave-statements = 1
log_timestamps=SYSTEM
#binlog
#binlog_format = STATEMENT
binlog_format = row
server-id = $IP$PORT
log-bin = /data/mysql/mysql3306/logs/mysql-bin
binlog_cache_size = 1M
max_binlog_size = 256M
sync_binlog = 0
expire_logs_days = 10
#procedure
log_bin_trust_function_creators=1
#GTID
gtid-mode = on
enforce-gtid-consistency=on
log-slave-updates=1
#replication
read_only=1
replicate-wild-ignore-table=mysql.%
#relay log
skip_slave_start = 1
max_relay_log_size = 128M
relay_log_purge = 1
relay_log_recovery = 1
relay-log=relay-bin
relay-log-index=relay-bin.index
#slave-skip-errors=1032,1053,1062
#skip-grant-tables=1
#buffers & cache
table_open_cache = 2048
table_definition_cache = 2048
table_open_cache = 2048
max_heap_table_size = 96M
sort_buffer_size = 128K
join_buffer_size = 128K
thread_cache_size = 200
query_cache_size = 0
query_cache_type = 0
query_cache_limit = 256K
query_cache_min_res_unit = 512
thread_stack = 192K
tmp_table_size = 96M
key_buffer_size = 8M
read_buffer_size = 2M
read_rnd_buffer_size = 16M
bulk_insert_buffer_size = 32M
#myisam
myisam_sort_buffer_size = 128M
myisam_max_sort_file_size = 10G
myisam_repair_threads = 1
#innodb
innodb_buffer_pool_size = 100M
innodb_buffer_pool_instances = 1
innodb_data_file_path = ibdata1:100M:autoextend
innodb_flush_log_at_trx_commit = 2
innodb_log_buffer_size = 8M
innodb_log_file_size = 1G
innodb_log_files_in_group = 3
innodb_max_dirty_pages_pct = 50
innodb_file_per_table = 1
innodb_rollback_on_timeout
innodb_status_file = 1
innodb_io_capacity = 2000
transaction_isolation = READ-COMMITTED
innodb_flush_method = O_DIRECT
loose_tokudb_cache_size=100M
loose_tokudb_directio=ON
loose_tokudb_fsync_log_period=1000
loose_tokudb_commit_sync=0
EOF
#创建一个配置在/etc下
rm -rf /etc/my.cnf
cp -f /data/mysql/mysql3306/my3306.cnf /etc/my.cnf
echo -e "开始执行初始化\n"
#初始化
/usr/local/mysql/bin/mysqld --defaults-file=/data/mysql/mysql3306/my3306.cnf --initialize &> /tmp/install.log
if [ $? == 0 ];then
echo -e "初始化成功\n"
else
echo -e "初始化失败\n"
exit 1
fi
#更新环境变量
echo -e "export PATH=\$PATH:/usr/local/mysql/bin" >> /etc/profile
echo -e "开始启动MySQL服务\n"
#启动MySQL服务
/usr/local/mysql/bin/mysqld --defaults-file=/data/mysql/mysql3306/my3306.cnf &
if [ $? == 0 ];then
echo -e "MySQL启动成功\n"
else
echo -e "启动失败，请检查日志/data/mysql/mysql3306/data/error.log\n"
exit 1
fi
PD=`cat /data/mysql/mysql3306/data/error.log |grep 'temporary password'|awk '{print $NF}'`
#后续需要的操作
echo -e "仔细阅读接下来你需要做的操作\n"
echo -e "1.环境变量设置完毕，请手动执行：source /etc/profile\n"
echo -e "2.初始密码为$PD\n在完成第1步的基础上执行mysql -uroot -p'$PD'进行登陆\n登陆后执行：alter user user() identified by '密码';\n注意密码需要打上引号，初次登陆必须更改密码\n"
echo -e "3.日志路径：/data/mysql/mysql3306/logs\n数据存储路径：/data/mysql/mysql3306/data\nMySQL部署路径：/usr/local/mysql\n"
echo -e "4.初始log_file_size设置为1G\n日志组设置为3\n初始buffer_pool_size设置为100M\n请执行：sed -i 's/innodb_buffer_pool_size = 100M/innodb_buffer_pool_size = 需要的大小/g' /data/mysql/mysql3306/my3306.cnf 进行修改\n"
echo -e "5.numa并没有关闭，请参照度娘/谷哥对numa进行设置\n"
echo -e "6.执行cat /data/mysql/mysql3306/my3306.cnf |grep server-id，如果结果是3306，表明网卡不是eth0，手动更改该server-id确保不会影响主从配置\n"
