Common Installation TasksThese tasks are performed on all DB servers, no matter what role (master or slave) they are to perform. Attach STOREFirst of all, the STORE is connected to the machine, as described here: Mounting STORE - All Linux except for STORE (CentOS8/Win2019) Install MySQLCentOS 8.x comes with some default repositories, which we do not want. These are disabled, and the MySQL repository is installed. Then the MySQL Server is installed. Translations Ignore |
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| # Make sure liibaio is on
dnf -y install libaio
# Disable some default stuff
dnf config-manager --disable mysql-connectors-community
dnf config-manager --disable mysql-tools-community
dnf -y module disable mysql
# Install the Oracle MySQL repo and the client
dnf -y install https://dev.mysql.com/get/mysql80-community-release-el8-1.noarch.rpm
dnf -y install mysql-community-server |
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Start MySQLNext, the MySQL server is configured to autostart on boot, and started up: Translations Ignore |
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| systemctl enable mysqld.service
systemctl start mysqld.service |
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Access to the MySQL Server is configured in the firewall: Translations Ignore |
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| firewall-cmd --zone=public --add-port=3306/tcp --permanent
firewall-cmd --reload |
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Configuration FilesMySQL 8.x creates a configuration directory /etc/my.cnf.d when it installs. The jtel configuration files are stored here, but a reference must be added to this directory so that mysql loads the configuration files. This is added with the following command: Translations Ignore |
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| cat <<EOFF >> /etc/my.cnf
#
# * IMPORTANT: Additional settings that can override those from this file!
# The files must end with '.cnf', otherwise they'll be ignored.
#
!includedir /etc/my.cnf.d/
EOFF
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The next command downloads the main configuration file for the mysql server. This file contains a lot of well commented settings which can be tweaked if required. The main parameter to be changed is the RAM usage of the sever. See below. Translations Ignore |
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| wget -P /etc/my.cnf.d http://cdn.jtel.de/downloads/configs/jtel-enhanced-8.cnf |
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Restart ServerNow, the MySQL must be restarted: Translations Ignore |
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| systemctl restart mysqld.service |
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After the first restart, user access must be setup. MySQL 8.x saves a generated random password for the root user in the file /var/log/mysqld.log This password must be extracted. Often, it contains special characters which cannot be input on the command line within a script. For the following command the password is input manually. Note, that <password> refers to the NEW password you want to assign to the root account. Status |
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colour | Red |
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title | Caution Password |
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| mysqladmin -u root -p password '<password>' |
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The following commands configure the further users required: Status |
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colour | Red |
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title | Caution Password |
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| mysql -u root -p<password> -v -e"CREATE USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '<password>'"
mysql -u root -p<password> -v -e"GRANT ALL ON *.* TO 'root'@'%' WITH GRANT OPTION"
mysql -u root -p<password> -v -e"FLUSH PRIVILEGES" |
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Install UDP PluginNext, the UDP plugin is installed. This is required for the communication with further software modules in the system, when certain DB changes are made. The installation is slightly different for master and slave servers. InstallationMaster Server Translations Ignore |
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| cp /home/jtel/shared/JTELCarrierPortal/Libraries/jtel_udf_udpsend/jtel_udf_udpsend.so /usr/lib64/mysql/plugin/
chown root:root /usr/lib64/mysql/plugin/jtel_udf_udpsend.so
chmod 755 /usr/lib64/mysql/plugin/jtel_udf_udpsend.so
chcon system_u:object_r:lib_t:s0 /usr/lib64/mysql/plugin/jtel_udf_udpsend.so |
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Slave Server
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| cp /home/jtel/shared/JTELCarrierPortal/Libraries/jtel_udf_udpsend/dummy/jtel_udf_udpsend.so /usr/lib64/mysql/plugin/
chown root:root /usr/lib64/mysql/plugin/jtel_udf_udpsend.so
chmod 755 /usr/lib64/mysql/plugin/jtel_udf_udpsend.so
chcon system_u:object_r:lib_t:s0 /usr/lib64/mysql/plugin/jtel_udf_udpsend.so |
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ConfigurationTo configure the plugin, the following commands are executed: Status |
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colour | Red |
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title | Caution Password |
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| mysql -u root -p<password> -v -e"DROP FUNCTION IF EXISTS udpsend"
mysql -u root -p<password> -v -e"CREATE FUNCTION udpsend RETURNS STRING SONAME 'jtel_udf_udpsend.so'" |
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| The configuration of the UDP plugin must be performed before the server is included in any replication between servers, otherwise replication will fail. The UDP plugin must be installed on all servers. |
In order that the server makes the best use of the RAM available, the configuration file /etc/my.cnf.d/jtel-enhanced-8.cnf must be adapted. The setting innodb_buffer_pool_size should be adapted to about 3/4 of the available RAM, but a minimum of 3-4 GB should remain for the use of other processes. For Servers with 4 GB RAM, this should not exceed 2 GB. Translations Ignore |
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| # For 4 GB RAM
innodb_buffer_pool_size = 2048M
# For 8 GB RAM
innodb_buffer_pool_size = 5120M
# For 12 GB RAM
innodb_buffer_pool_size = 8192M
# For 16 GB RAM
innodb_buffer_pool_size = 12288M
...
# From 16 GB simply take 3/4 of the RAM |
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Restart MySQLFinally, the MySQL server is restarted for the last time, to load all configuration settings. Translations Ignore |
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language | bash |
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title | Restart the MySQL server |
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| systemctl restart mysqld.service |
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