#!/bin/bash
# Date:2018/11/29
# Author:  linyaohong
# BLOG:  https://www.linyaohong.com
# QQ:122123498
# Version:1.0
# User: Centos 7
export PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin
# THREAD=$(grep 'processor' /proc/cpuinfo | sort -u | wc -l)
mysql_install_dir=/usr/local/mysql
mysql_data_dir=/data/mysql
mysql57_ver=mysql-5.7.30-linux-glibc2.12-x86_64
Mem=`free -m | awk '/Mem:/{print $2}'`
dbrootpwd=111111
Install_MySQL57(){
    yum install gcc gcc-c++ bzip2 lsof autoconf ncurses-devel libaio-devel cmake -y >/dev/null 2>&1
    [ `netstat -lntup|grep 3306|wc -l` != 0 ] && { echo "${CRED}MySQL prot 3306 existing${END}"; kill -9 $$; }
    # kill `ps -ef|grep mysql|grep -v grep|awk '{print $2}'`
    # sleep 5
    id -u mysql >/dev/null 2>&1
    [ $? -ne 0 ] && useradd -M -s /sbin/nologin mysql
    [ -d "${mysql_install_dir}" ] && { echo "${CRED}MySQL install failed, mysql_install_dir existing${END}"; kill -9 $$; }
    if [ -d "${mysql_data_dir}" ];then
        if [ "`ls -A ${mysql_data_dir}`" = "" ];then
            echo "${CSUCCESS}Directory checked OK${END}"
            chown mysql.mysql -R ${mysql_data_dir}
        else
            echo "${CRED}Please check if data Directory is empty${END}"
            kill -9 $$
        fi
    else
        mkdir -p ${mysql_data_dir}
        chown mysql.mysql -R ${mysql_data_dir}
    fi
    echo  "${CSUCCESS}MySQL Directory Check OK${END}"
    [ ! -e ${mysql57_ver}.tar.gz.md5 ] && wget https://mirrors.linyaohong.com/src/${mysql57_ver}.tar.gz.md5
    # [ ! -e ${mysql57_ver}.tar.gz ] && wget https://mirrors.linyaohong.com/src/mysql/${mysql57_ver}.tar.gz
    [ ! -e ${mysql57_ver}.tar.gz ] && wget http://mirrors.ustc.edu.cn/mysql-ftp/Downloads/MySQL-5.7/${mysql57_ver}.tar.gz
    md5sum -c ${mysql57_ver}.tar.gz.md5
    [ $? -ne 0 ] && { echo "${CRED}The mysql57_ver is broken${END}";kill -9 $$;}
    tar xzf ${mysql57_ver}.tar.gz
    mv ${mysql57_ver} ${mysql_install_dir}
    sed -i 's@executing mysqld_safe@executing mysqld_safe\nexport LD_PRELOAD=/usr/local/lib/libjemalloc.so@' ${mysql_install_dir}/bin/mysqld_safe
    sed -i "s@/usr/local/mysql@${mysql_install_dir}@g" ${mysql_install_dir}/bin/mysqld_safe
    /bin/cp ${mysql_install_dir}/support-files/mysql.server /etc/init.d/mysqld
    sed -i "s@^basedir=.*@basedir=${mysql_install_dir}@" /etc/init.d/mysqld
    sed -i "s@^datadir=.*@datadir=${mysql_data_dir}@" /etc/init.d/mysqld
    chmod +x /etc/init.d/mysqld
    chkconfig --add mysqld
    chkconfig mysqld on

    # my.cnf
    cat > /etc/my.cnf << EOF
[client]
port = 3306
socket = /tmp/mysql.sock

[mysql]
prompt="MySQL [\\d]> "
no-auto-rehash

[mysqld]
#skip-grant-table
port = 3306
socket = /tmp/mysql.sock

basedir = ${mysql_install_dir}
datadir = ${mysql_data_dir}
pid-file = ${mysql_data_dir}/mysql.pid
user = mysql
bind-address = 0.0.0.0
server-id = 1

init-connect = 'SET NAMES utf8mb4'
character-set-server = utf8mb4

skip-name-resolve
#skip-networking
back_log = 300

max_connections = 1000
max_connect_errors = 6000
open_files_limit = 65535
table_open_cache = 128
max_allowed_packet = 500M
max_heap_table_size = 8M
tmp_table_size = 16M

read_buffer_size = 2M
read_rnd_buffer_size = 8M
sort_buffer_size = 8M
join_buffer_size = 8M
key_buffer_size = 4M

thread_cache_size = 8

query_cache_type = 1
query_cache_size = 8M
query_cache_limit = 2M

ft_min_word_len = 4

log_bin = mysql-bin
binlog_format = mixed
expire_logs_days = 7
max_binlog_size = 512M
binlog_cache_size = 1M

log_error = ${mysql_data_dir}/mysql-error.log
slow_query_log = 1
long_query_time = 2
#log_queries_not_using_indexes = on
slow_query_log_file = ${mysql_data_dir}/mysql-slow.log

#read-only
#log-slave-updates
#slave-skip-errors = 1032,1062
#replicate-ignore-db = mysql
#replicate_wild_do_table = mysql.table01

performance_schema = 0
explicit_defaults_for_timestamp

#lower_case_table_names = 1

skip-external-locking

default_storage_engine = InnoDB
#default-storage-engine = MyISAM
innodb_file_per_table = 1
innodb_open_files = 500
innodb_buffer_pool_size = 64M
innodb_write_io_threads = 4
innodb_read_io_threads = 4
innodb_thread_concurrency = 0
innodb_purge_threads = 1
innodb_flush_log_at_trx_commit = 2
innodb_log_buffer_size = 2M
innodb_log_file_size = 32M
innodb_log_files_in_group = 3
innodb_max_dirty_pages_pct = 90
innodb_lock_wait_timeout = 120

bulk_insert_buffer_size = 8M
myisam_sort_buffer_size = 8M
myisam_max_sort_file_size = 10G
myisam_repair_threads = 1

interactive_timeout = 28800
wait_timeout = 28800

[mysqldump]
quick
max_allowed_packet = 500M

[myisamchk]
key_buffer_size = 8M
sort_buffer_size = 8M
read_buffer = 4M
write_buffer = 4M
EOF
    sed -i "s@max_connections.*@max_connections = $((${Mem}/3))@" /etc/my.cnf
    if [ ${Mem} -gt 1500 -a ${Mem} -le 2500 ]; then
        sed -i 's@^thread_cache_size.*@thread_cache_size = 32@' /etc/my.cnf
        sed -i 's@^query_cache_size.*@query_cache_size = 64M@' /etc/my.cnf
        sed -i 's@^myisam_sort_buffer_size.*@myisam_sort_buffer_size = 16M@' /etc/my.cnf
        sed -i 's@^key_buffer_size.*@key_buffer_size = 128M@' /etc/my.cnf
        sed -i 's@^innodb_buffer_pool_size.*@innodb_buffer_pool_size = 256M@' /etc/my.cnf
        sed -i 's@^tmp_table_size.*@tmp_table_size = 64M@' /etc/my.cnf
        sed -i 's@^table_open_cache.*@table_open_cache = 128@' /etc/my.cnf
    elif [ ${Mem} -gt 2500 -a ${Mem} -le 4500 ]; then
        sed -i 's@^thread_cache_size.*@thread_cache_size = 64@' /etc/my.cnf
        sed -i 's@^query_cache_size.*@query_cache_size = 128M@' /etc/my.cnf
        sed -i 's@^myisam_sort_buffer_size.*@myisam_sort_buffer_size = 16M@' /etc/my.cnf
        sed -i 's@^key_buffer_size.*@key_buffer_size = 256M@' /etc/my.cnf
        sed -i 's@^innodb_buffer_pool_size.*@innodb_buffer_pool_size = 384M@' /etc/my.cnf
        sed -i 's@^tmp_table_size.*@tmp_table_size = 128M@' /etc/my.cnf
        sed -i 's@^table_open_cache.*@table_open_cache = 256@' /etc/my.cnf
    elif [ ${Mem} -gt 4500 -a ${Mem} -le 6500 ]; then
        sed -i 's@^thread_cache_size.*@thread_cache_size = 128@' /etc/my.cnf
        sed -i 's@^query_cache_size.*@query_cache_size = 256M@' /etc/my.cnf
        sed -i 's@^myisam_sort_buffer_size.*@myisam_sort_buffer_size = 64M@' /etc/my.cnf
        sed -i 's@^key_buffer_size.*@key_buffer_size = 384M@' /etc/my.cnf
        sed -i 's@^innodb_buffer_pool_size.*@innodb_buffer_pool_size = 1024M@' /etc/my.cnf
        sed -i 's@^tmp_table_size.*@tmp_table_size = 512M@' /etc/my.cnf
        sed -i 's@^table_open_cache.*@table_open_cache = 512@' /etc/my.cnf
    elif [ ${Mem} -gt 6500 ]; then
        sed -i 's@^thread_cache_size.*@thread_cache_size = 192@' /etc/my.cnf
        sed -i 's@^query_cache_size.*@query_cache_size = 512M@' /etc/my.cnf
        sed -i 's@^myisam_sort_buffer_size.*@myisam_sort_buffer_size = 64M@' /etc/my.cnf
        sed -i 's@^key_buffer_size.*@key_buffer_size = 512M@' /etc/my.cnf
        sed -i 's@^innodb_buffer_pool_size.*@innodb_buffer_pool_size = 2048M@' /etc/my.cnf
        sed -i 's@^tmp_table_size.*@tmp_table_size = 1024M@' /etc/my.cnf
        sed -i 's@^table_open_cache.*@table_open_cache = 1024@' /etc/my.cnf
    fi
    ${mysql_install_dir}/bin/mysqld --initialize-insecure --user=mysql --basedir=${mysql_install_dir} --datadir=${mysql_data_dir}
    [ $? -ne 0 ] &&  { echo "${CRED}MySQL initialization failed${END}"; kill -9 $$; }
    chmod 600 /etc/my.cnf
    chown mysql.mysql -R ${mysql_data_dir}
    [ -d "/etc/mysql" ] && /bin/mv /etc/mysql{,_bk}
    service mysqld start
    [ $? -ne 0 ] &&  { echo "${CRED} MySQL start Failed ${END}"; kill -9 $$; }
    [ -z "$(grep ^'export PATH=' /etc/profile)" ] && echo "export PATH=${mysql_install_dir}/bin:\$PATH" >> /etc/profile
    [ -n "$(grep ^'export PATH=' /etc/profile)" -a -z "$(grep ${mysql_install_dir} /etc/profile)" ] && sed -i "s@^export PATH=\(.*\)@export PATH=${mysql_install_dir}/bin:\1@" /etc/profile
    . /etc/profile

    ${mysql_install_dir}/bin/mysql -e "grant all privileges on *.* to root@'127.0.0.1' identified by \"${dbrootpwd}\" with grant option;"
    ${mysql_install_dir}/bin/mysql -e "grant all privileges on *.* to root@'localhost' identified by \"${dbrootpwd}\" with grant option;"
    ${mysql_install_dir}/bin/mysql -uroot -p${dbrootpwd} -e "reset master;"
    # ${mysql_install_dir}/bin/mysql -uroot -p${dbrootpwd} -e "drop database test;"
    ${mysql_install_dir}/bin/mysql -uroot -p${dbrootpwd} -e "delete from mysql.user where not (user='root');"
    ${mysql_install_dir}/bin/mysql -uroot -p${dbrootpwd} -e "flush privileges;"

    rm -rf /etc/ld.so.conf.d/{mysql,mariadb,percona,alisql}*.conf
    [ -e "${mysql_install_dir}/my.cnf" ] && rm -f ${mysql_install_dir}/my.cnf
    echo "${mysql_install_dir}/lib" > /etc/ld.so.conf.d/z-mysql.conf
    ldconfig
    service mysqld stop
    service mysqld start
    echo "${CSUCCESS}MySQL installed successfully!${END}"
}
Install_MySQL57