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Category: High Availability

ProxySQL Tutorial – Master and Slave

Continuing on the series of blog posts about ProxySQL. Today I will demonstrate how to put ProxySQL in front of your master and slave topology and distribute reads and writes between the servers, without the need of changing your application code. To install ProxySQL and some of its basic concepts, please read this blog post. On this tutorail, we will use 4 servers: ProxySQL (192.168.112.60) Node1 – Master (192.168.112.61) Node2 – Slave-1 (192.168.112.62) Node3 – Slave-3 (192.168.112.63)   Servers With ProxySQL already installed, we will connect into the admin interface, add our 3 servers and configure Replication Hostgroup. Basically, we will tell ProxySQL which HG will be our master and which HG will be our slaves. ProxySQL differs master and slaves based on server  read_only variable: $ mysql -u admin -padmin -h 127.0.0.1 -P . . .

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ProxySQL – Sync / Import users

On my last post I gave a gasp about some key concepts of ProxySQL. Today I will demonstrate how we can import all users from MySQL to ProxySQL To accomplish this, we will make use of,proxysql-admin a tool developed by  Percona to help you manage and install ProxySQL. If you are using ProxySQL provided by Percona, this tool is already installed, otherwise, you can download it directly from Github. We will use the  –syncusers option, which will connect to the desired MySQL server, read all users from  mysql.user table and import or sync them to ProxySQL: proxysql-admin –cluster-username=[mysql-user] –cluster-password=[mysql-password] –cluster-port=[mysql-port] –cluster-hostname=[mysql-host] –syncusers This tool was originally designed to enhance the compatibility between ProxySQL and  Percona XtraDB Cluster, so, many terminology mentions cluster, however, the functionality demonstrate on this post is fully compatible with Master-Slave. Here . . .

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Understanding ProxySQL

In this post, I will cover a bit of ProxySQL. ProxySQL is a proxy which implements MySQL protocol, allowing it to do things that other proxies cannot do. ProxySQL is gaining a lot of traction nowadays and it’s capable to integrate with a variety of products from MySQL ecosystems, such as replication (master – slave / master – master), Percona XtraDB Cluster and Group Replication. One of its many functionalities (which IMHO makes it awesome) is the ability to do read/write split seamless to the application. You can start sending reads to your slave without doing a single line of code. In this article, I will cover a few important points to understand how it works. Instalation The instalation is easy, you can do it by: Downloading the corresponding package for . . .

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