scoopex / mysql_install

A simple script to install mysql/maraidb databases

mysql_install

A simple script to install mysql/mariadb databases.

The script create mysql/mariadb instances with the following characteristics:

• the database instance runs in a dedicated directory to use a fiberchannel/san volume
• the database instance with a dedicated user (group mysql, to allow usage of linux hugepages)
• multiple database instances (with different releases) can be executed
• the script creates pacemaketr configuration commands to add the instance to a pacemaker cluster
  • the fiberchannel/san volume needs to be only used for a single instance
  • the fiberchannel/san volume should be available at all systems
  • split brain problems have to be prevented by STONITH (i.e. using IPMI)

Please forgive the poor documentation, this is work in progress.

MariaDB Installation

This procedure describe the installation on RHEL 7.

• TODO: Configure linux hugepages
• TODO: Configure a dedicated mountpoint fpr the database
• Disable SELinux

perl -pe -i '~s,^SELINUX=.*$,SELINUX=disabled,' /etc/sysconfig/selinux
reboot

• Install Percona Toolkit : http://www.percona.com/downloads/percona-toolkit/LATEST/RPM/

cd /tmp
wget http://www.percona.com/redir/downloads/percona-toolkit/LATEST/RPM/percona-toolkit-2.2.8-1.noarch.rpm
yum install perl perl-DBI perl-DBD-MySQL perl-Time-HiRes perl-IO-Socket-SSL
rpm -Uvh percona-toolkit-*.noarch.rpm

• Install the tooling

yum install git
mkdir /data/tools
cd /data/tools
# git clone [e-mail]:breuninger-ecom/mysql_install.git
git clone https://github.com/breuninger-ecom/mysql_install.git

• Download installation binaries to /data/tools/mysql_install/install

  • MariaDB: https://downloads.mariadb.org/ ("mariadb-5.5.36-linux-x86_64.tar.gz")
  • XtraDB Backup: http://www.percona.com/software/percona-xtrabackup ("percona-xtrabackup-2.1.8-733-Linux-x86_64.tar.gz")

• Install a new instance

groupadd -g 27 mysql
mkdir -p /data/mariadb/
cd /data/tools/mysql_install
export PASSWD_MONITOR="myfunkypassword"
# Answer questions
./local_mariadb_database.sh

• Start instance and add it to system startup procedure

/etc/init.d/l_mam01 start
chkconfig l_mam01 on

• Test the new instance

su - l_mam01
mysql
exit

• Create a cronjob (i.e. at the slave)

crontab -l
0 5,8,11,14,17,20 * * * /data/tools/mysql_install/backup-databases.sh /data/mariadb/l_mas01/backup/ 3

Manage databases

• Define passwords

# User for regular application access, without ddl permissions
export APP_PASSWORD="$RADNOM$RANDOM$RANDOM"
# User for privileged administration access, with ddl permissions
export ADM_PASSWORD="$RADNOM$RANDOM$RANDOM"

• Get information about the dbcreator.sh Script

/data/tools/mysql_install/dbcreator.sh

• Manage datbases
• Create two databases "foo1" and "foo2" and two users "fooapp_adm" and "fooapp_app" which can access the databases

/data/tools/mysql_install/dbcreator.sh -u fooapp -d foo1 -d foo2

• Create a new datbases and resuse the users fooapp_adm and fooapp_app

/data/tools/mysql_install/dbcreator.sh -u fooapp -d foo3 -c db

• TODO: TO BE CONTINUED

Collect Debug data

• Start a screen session
  (better than a cronjob, because it is gone after a emergency reboot)

  screen -S collect_mysql_debug_data
  

• Start Profiling

  mkdir -p /var/log/mysql/collect_debug_info
  for i in `seq 1 120`; do
     ./collect_debug_info.sh -l /var/log/mysql/collect_debug_info -m '--defaults-file=/etc/mysql/debian.cnf'
     sleep 2m
  done