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Mysql Installation


1 Intro

The data of the current version of the tars framework is ultimately stored in mysql, so MySQL needs to be installed.

There are several ways to install mysql. You can choose one of them.

2 Install by source

This step installs mysql via source code in order to set up configurations manually.

Before installation, check whether ncurses and zlib have been installed. Execute these commands if not exist:

yum install -y ncurses-devel zlib-devel cmake make gcc gcc-c++

set the installation directory, switch to user root.

cd /usr/local
mkdir mysql-5.6.26
chown ${owner}:${owner} ./mysql-5.6.26
ln -s /usr/local/mysql-5.6.26 /usr/local/mysql

Download mysql source (mysql-5.6.26), set charset to utf-8.

cd ${mysql dir}
tar -zxvf mysql-5.6.26.tar.gz
make install

Attention: If you use C++ to develop Tars service, please compile mysql as static library

Now you can compile Tars framework of C++ version.

If you need build runtime environment for Tars framework, pelease switch to mysql administrator user and config mysql with following steps:

The following script has delete action (rm -rf /usr/local/mysql/data), please note!!

yum install perl
cd /usr/local/mysql
useradd mysql
rm -rf /usr/local/mysql/data
mkdir -p /data/mysql-data
ln -s /data/mysql-data /usr/local/mysql/data
chown -R mysql:mysql /data/mysql-data /usr/local/mysql/data
cp support-files/mysql.server /etc/init.d/mysql
yum install -y perl-Module-Install.noarch
perl scripts/mysql_install_db --user=mysql
vim /usr/local/mysql/my.cnf

Here is an example of my.cnf:
**Tips: As the system will load /etc/
rm -rf /etc/my.cnf
my.cnf first,you may delect the /etc/my.cnf or copy the essential information from the following example and paste to /ect/my.cnf. Otherwise it will not work.

# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
innodb_buffer_pool_size = 128M

# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.

# These are commonly set, remove the # and set as required.
basedir = /usr/local/mysql
datadir = /usr/local/mysql/data
# port = .....
# server_id = .....
socket = /tmp/mysql.sock

bind-address=${your machine ip}

# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
join_buffer_size = 128M
sort_buffer_size = 2M
read_rnd_buffer_size = 2M


Note that change the bind address to the IP address of the deployment machine IP

Start mysql

service mysql start
chkconfig mysql on

Stop mysql

service mysql stop

Add mysql execution path to environment variable for path.

vim /etc/profile
export PATH

Modify root’s password

./bin/mysqladmin -u root password 'root@appinside'
./bin/mysqladmin -u root -h ${主机名} password 'root@appinside'

Add mysql dynamic library path to environment variable for path.

vim /etc/

The master-slave configuration for mysql can be found in the Internet.

Grant authority to master

GRANT REPLICATION SLAVE ON *.* to 'mysql-sync'@'%' identified by 'sync@appinside'

Configure slave for replication:

change master to master_host='${master Ip}',master_user='mysql-sync',master_password='sync@appinside' ,master_log_file='iZ94orl0ix4Z-bin.000004',master_log_pos=611;
stop slave
start slave
show master status\G;
show slave status\G;

3 Install by yum

This step allows you to download the mysql official yum repository.

The install scripts named included in version 5.6 have been deleted after version 5.7. Therefore, here comes the yum installation.

The installation via yum is an easier way but with that you cannot adjust configs manually. If that is not what you want, the source code method is recommended.

You can download mysql using wget. Below is an example downloading version 5.7, but you can change it to the desired version.

wget -i -c
yum -y install mysql57-community-release-el7-10.noarch.rpm
yum -y install mysql-community-server
yum -y install mysql-devel

If you have problems to install mysql with the above step, add the new mysql repository to local server with this yum command and then re-run the previous commands.

sudo yum localinstall

**Configure mysql **

After installing mysql, start and check its status.

systemctl start  mysqld.service
systemctl status mysqld.service

mysql started and it’s using port 3306 for the connection.

Configure the mysql root password. mysql will generate a strong default password when it is started for the first time. The default password is shown in mysqld.log file. You can use the grep command below for showing the default mysql password.

grep "password" /var/log/mysqld.log

Connect to the mysql shell with the default password.

You can’t operate until changing the password. If your mysql version is later than 5.7, there are two ways to configure the strong password rules as follows:

  1. Set up a strong password
  2. Change the password rules as follows
set global validate_password_policy=0;
set global validate_password_length=1;

Now replace the default password with a new password with a six-character minimum restriction.

ALTER USER 'root'@'localhost' IDENTIFIED BY '${your passwd}';
flush privileges;

4 Install mysql5 by docker

For CentOS installation of docker, please refer to docker

Use docker installation to install MySQL (currently only Linux is considered, time and local synchronization )

docker pull mysql:5.6
docker run --name mysql --net=host -e MYSQL_ROOT_PASSWORD='root@appinside' -d -p 3306:3306 \
        -v/etc/localtime:/etc/localtime \
        -v /data/mysql-data:/var/lib/mysql mysql:5.6

Note: –net=host indicates that the docker network is the same as the local one

5 Install mysql8

If you use mysql8, please note that mysql8 opens SSL by default, and password authentication uses caching_sha2_password, so when starting MySQL 8, you need to turn off SSL and use MySQL by mysql_native_password mode, for example:

docker run -d --restart=always --net=host -p 3306:3306 -v /usr/local/mysql-data-8:/var/lib/mysql  -e MYSQL_ROOT_PASSWORD=tars@12345 -e TZ=Asia/Shanghai mysql:8 --skip_ssl --default-authentication-plugin=mysql_native_password

The source code compilation is similar to mysql8. SSL needs to be turned off and enabled mysql_native_password