0x14-mysql

0x14. MySQL

Resource

• What is a database
• What is a database primary/replicate cluster
• MySQL primary/replicate setup
• Build a robust database backup strategy
• Privileges Provided by MySQL (Replication Client)
• Creating User for Replication
• Setting up replicas (MySQL 5.7.x)

Tasks

0. Install MySQL

1. Let us in!

mysql> CREATE USER 'holberton_user'@'localhost' IDENTIFIED BY 'projectcorrection280hbtn';
mysql> GRANT REPLICATION CLIENT ON *.* to 'holberton_user'@'localhost';
mysql> FLUSH PRIVILEGES;

2. If only you could see what I've seen with your eyes

mysql> CREATE DATABASE tyrell_corp;
mysql> USE tyrell_corp;
mysql> CREATE TABLE nexus6 (id INT, name VARCHAR(256));
mysql> INSERT INTO nexus6 (id, name) VALUES ('1', 'Leon');
mysql> GRANT SELECT ON tyrell_corp.nexus6 TO 'holberton_user'@'localhost';

3. Quite an experience to live in fear, isn't it?

msql> CREATE USER 'replica_user'@'%' IDENTIFIED BY 'password';
mysql> GRANT SELECT ON mysql.user TO 'holberton_user'@'localhost';
mysql> GRANT REPLICATION SLAVE ON *.* TO 'replica_user'@'%';

4. Setup a Primary-Replica infrastructure using MySQL

• MySQL primary configuration
• MySQL replica configuration

5. MySQL backup

ubuntu@03-web-01:~$ ls
5-mysql_backup
ubuntu@03-web-01:~$ ./5-mysql_backup mydummypassword
backup.sql
ubuntu@03-web-01:~$ ls
01-03-2017.tar.gz  5-mysql_backup  backup.sql
ubuntu@03-web-01:~$ more backup.sql
-- MySQL dump 10.13  Distrib 5.7.25, for debian-linux-gnu (x86_64)
--
-- Host: localhost    Database:
-- ------------------------------------------------------
-- Server version   5.7.25-0ubuntu0.14.04.1

/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
/*!40101 SET NAMES utf8 */;
/*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */;
/*!40103 SET TIME_ZONE='+00:00' */;
/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;

--
-- Current Database: `tyrell_corp`
--

CREATE DATABASE /*!32312 IF NOT EXISTS*/ `tyrell_corp` /*!40100 DEFAULT CHARACTER SET latin1 */;

USE `tyrell_corp`;

--
-- Table structure for table `nexus6`
--

DROP TABLE IF EXISTS `nexus6`;
/*!40101 SET @saved_cs_client     = @@character_set_client */;
/*!40101 SET character_set_client = utf8 */;
CREATE TABLE `nexus6` (
  `id` int(6) unsigned NOT NULL AUTO_INCREMENT,
  `firstname` varchar(30) NOT NULL,
  `lastname` varchar(30) NOT NULL,
  `email` varchar(50) DEFAULT NULL,
  `reg_date` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=latin1;
/*!40101 SET character_set_client = @saved_cs_client */;
ubuntu@03-web-01:~$
ubuntu@03-web-01:~$ file 01-03-2017.tar.gz
01-03-2017.tar.gz: gzip compressed data, from Unix, last modified: Wed Mar  1 23:38:09 2017
ubuntu@03-web-01:~$

• Backup script