#!/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
mysql_install_dir=/usr/local/mysql
mysql_prot_3308=3308
dbroot_pwd_3308=111111
mysql_server_id_3308=7
mysql_data_dir_3308=/data/${mysql_prot_3308}
Mem=$(free -m | awk '/Mem:/{print $2}')
# Mem=$(`free -m | awk '/Mem:/{print $2}'`)

Install_MySQL57_3308() {
    [ ! -d "${mysql_install_dir}" ] && { echo "${CRED}MySQL not installed${END}"; kill -9 $$; }
    [ $(netstat -lntup|grep ${mysql_prot_3308}|wc -l) != 0 ] && { echo "${CRED}MySQL prot ${mysql_prot_3308} existing${END}"; kill -9 $$; }
    if [ -d "${mysql_data_dir_3308}" ];then
        if [ "`ls -A ${mysql_data_dir_3308}`" = "" ];then
            echo "${CSUCCESS}Directory checked OK...${CEND}"
            chown mysql.mysql -R ${mysql_data_dir_3308}
        else
            echo "${CRED}Please check if data Directory is empty${CEND}"
            kill -9 $$
        fi
    else
        mkdir -p ${mysql_data_dir_3308}/data
        chown mysql.mysql -R ${mysql_data_dir_3308}

    fi

    ${mysql_install_dir}/bin/mysqld  --initialize-insecure --user=mysql --basedir=${mysql_install_dir} --datadir=${mysql_data_dir_3308}/data
    [ $? -ne 0 ] &&  { echo "${CSUCCESS}MySQL initialization failed${END}"; kill -9 $$; }
    echo "${CSUCCESS}MySQL Initialize successfully!${END}"

    # my.cnf
    cat > ${mysql_data_dir_3308}/my.cnf << EOF
[client]
port = ${mysql_prot_3308}
socket = ${mysql_data_dir_3308}/mysql.sock

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

[mysqld]
#skip-grant-table
port = ${mysql_prot_3308}
socket = ${mysql_data_dir_3308}/mysql.sock

basedir = ${mysql_install_dir}
datadir = ${mysql_data_dir_3308}/data
pid-file = ${mysql_data_dir_3308}/mysql.pid
user = mysql
bind-address = 0.0.0.0
server-id = ${mysql_server_id_3308}

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_data_dir_3308}/mysql-bin
binlog_format = mixed
expire_logs_days = 7
max_binlog_size = 512M
binlog_cache_size = 1M

relay-log = ${mysql_data_dir_3308}/relay-bin
relay-log-info-file = ${mysql_data_dir_3308}/relay-log.info

log_error = ${mysql_data_dir_3308}/${mysql_prot_3308}_mysql-error.log
slow_query_log = 1
long_query_time = 2
#log_queries_not_using_indexes = on
slow_query_log_file = ${mysql_data_dir_3308}/${mysql_prot_3308}_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

[mysqld_safe]
pid-file = ${mysql_data_dir_3308}/mysql.pid
log-error = ${mysql_data_dir_3308}/${mysql_prot_3308}_error.log

[mysqldump]
quick
max_allowed_packet = 500M

[myisamchk]
key_buffer_size = 8M
sort_buffer_size = 8M
read_buffer = 4M
write_buffer = 4M
EOF

cat > ${mysql_data_dir_3308}/mysql <<EOF
#!/bin/sh
#init
port="${mysql_prot_3308}"
mysql_user="root"
mysql_pwd="${dbroot_pwd_3308}"
CmdPath="${mysql_install_dir}/bin"
mysql_sock="${mysql_data_dir_3308}/mysql.sock"
my_conf=${mysql_data_dir_3308}/my.cnf
mysql_data_dir_3308=${mysql_data_dir_3308}
function_start_mysql()
{
    if [ ! -e "\${mysql_sock}" ];then
      printf "Starting MySQL...\n"
      /bin/sh \${CmdPath}/mysqld_safe --defaults-file=\${my_conf} 2>&1 > /dev/null &
    else
      printf "MySQL is running...\n"
      exit
    fi
}

#stop function
function_stop_mysql()
{
    if [ ! -e "\${mysql_sock}" ];then
       printf "MySQL is stopped...\n"
       exit
    else
       printf "Stoping MySQL...\n"
       \${CmdPath}/mysqladmin -u \${mysql_user} -p\${mysql_pwd} -S \${mysql_sock} shutdown
   fi
}

#restart function
function_restart_mysql()
{
    printf "Restarting MySQL...\n"
    function_stop_mysql
    sleep 2
    function_start_mysql
}

case \$1 in
start)
    function_start_mysql
;;
stop)
    function_stop_mysql
;;
restart)
    function_restart_mysql
;;
*)
    printf "Usage: \${mysql_data_dir_3308}/mysql {start|stop|restart}\n"
esac
EOF

    sed -i "s@max_connections.*@max_connections = $((${Mem}/3))@" ${mysql_data_dir_3308}/my.cnf
    if [ ${Mem} -gt 1500 -a ${Mem} -le 2500 ]; then
        sed -i 's@^thread_cache_size.*@thread_cache_size = 32@' ${mysql_data_dir_3308}/my.cnf
        sed -i 's@^query_cache_size.*@query_cache_size = 64M@' ${mysql_data_dir_3308}/my.cnf
        sed -i 's@^myisam_sort_buffer_size.*@myisam_sort_buffer_size = 16M@' ${mysql_data_dir_3308}/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@' ${mysql_data_dir_3308}/my.cnf
        sed -i 's@^tmp_table_size.*@tmp_table_size = 64M@' ${mysql_data_dir_3308}/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@' ${mysql_data_dir_3308}/my.cnf
        sed -i 's@^query_cache_size.*@query_cache_size = 128M@' ${mysql_data_dir_3308}/my.cnf
        sed -i 's@^myisam_sort_buffer_size.*@myisam_sort_buffer_size = 16M@' ${mysql_data_dir_3308}/my.cnf
        sed -i 's@^key_buffer_size.*@key_buffer_size = 256M@' ${mysql_data_dir_3308}/my.cnf
        sed -i 's@^innodb_buffer_pool_size.*@innodb_buffer_pool_size = 384M@' ${mysql_data_dir_3308}/my.cnf
        sed -i 's@^tmp_table_size.*@tmp_table_size = 128M@' ${mysql_data_dir_3308}/my.cnf
        sed -i 's@^table_open_cache.*@table_open_cache = 256@' ${mysql_data_dir_3308}/my.cnf
    elif [ ${Mem} -gt 4500 -a ${Mem} -le 6500 ]; then
        sed -i 's@^thread_cache_size.*@thread_cache_size = 128@' ${mysql_data_dir_3308}/my.cnf
        sed -i 's@^query_cache_size.*@query_cache_size = 256M@' ${mysql_data_dir_3308}/my.cnf
        sed -i 's@^myisam_sort_buffer_size.*@myisam_sort_buffer_size = 64M@' ${mysql_data_dir_3308}/my.cnf
        sed -i 's@^key_buffer_size.*@key_buffer_size = 384M@' ${mysql_data_dir_3308}/my.cnf
        sed -i 's@^innodb_buffer_pool_size.*@innodb_buffer_pool_size = 1024M@' ${mysql_data_dir_3308}/my.cnf
        sed -i 's@^tmp_table_size.*@tmp_table_size = 512M@' ${mysql_data_dir_3308}/my.cnf
        sed -i 's@^table_open_cache.*@table_open_cache = 512@' ${mysql_data_dir_3308}/my.cnf
    elif [ ${Mem} -gt 6500 ]; then
        sed -i 's@^thread_cache_size.*@thread_cache_size = 192@' ${mysql_data_dir_3308}/my.cnf
        sed -i 's@^query_cache_size.*@query_cache_size = 512M@' ${mysql_data_dir_3308}/my.cnf
        sed -i 's@^myisam_sort_buffer_size.*@myisam_sort_buffer_size = 64M@' ${mysql_data_dir_3308}/my.cnf
        sed -i 's@^key_buffer_size.*@key_buffer_size = 512M@' ${mysql_data_dir_3308}/my.cnf
        sed -i 's@^innodb_buffer_pool_size.*@innodb_buffer_pool_size = 2048M@' ${mysql_data_dir_3308}/my.cnf
        sed -i 's@^tmp_table_size.*@tmp_table_size = 1024M@' ${mysql_data_dir_3308}/my.cnf
        sed -i 's@^table_open_cache.*@table_open_cache = 1024@' ${mysql_data_dir_3308}/my.cnf
    fi

    chmod 600 ${mysql_data_dir_3308}/my.cnf
    chmod 700 ${mysql_data_dir_3308}/mysql
    touch ${mysql_data_dir_3308}/${mysql_prot_3308}_error.log
    chown mysql.mysql -R ${mysql_data_dir_3308}
    ${mysql_data_dir_3308}/mysql  start
    sleep 3
    [ $(netstat -lntup|grep ${mysql_prot_3308}|wc -l) != 1 ] &&  { echo "${CRED}MySQL start failed${END}"; kill -9 $$; }
    echo "${CSUCCESS}MySQL starting success!${END}"
    ${mysql_install_dir}/bin/mysql -S ${mysql_data_dir_3308}/mysql.sock -e "grant all privileges on *.* to root@'127.0.0.1' identified by \"${dbroot_pwd_3308}\" with grant option;"
    ${mysql_install_dir}/bin/mysql -S ${mysql_data_dir_3308}/mysql.sock -e "grant all privileges on *.* to root@'localhost' identified by \"${dbroot_pwd_3308}\" with grant option;"
    ${mysql_install_dir}/bin/mysql -S ${mysql_data_dir_3308}/mysql.sock -uroot -p${dbroot_pwd_3308} -e "reset master;"
    ${mysql_install_dir}/bin/mysql -S ${mysql_data_dir_3308}/mysql.sock -uroot -p${dbroot_pwd_3308} -e "delete from mysql.user where not (user='root') ;"
    ${mysql_install_dir}/bin/mysql -S ${mysql_data_dir_3308}/mysql.sock -uroot -p${dbroot_pwd_3308} -e "flush privileges;"
    echo "${CSUCCESS}MySQL installed successfully!${END}"
}
Install_MySQL57_3308