In this tutorial I will show you how to install a MySQL cluster on a single node: obviously you will not gain any hardware redundancy with this setup but it is useful if you need to create a test installation as it was for me. You can find many tutorials about this topic but they are quite old and MySQL Cluster changed a lot in last years.
What is a MySQL cluster?
Let’s start explaining the architecture of a MySQL cluster with an image taken from dev.mysql.com:
As you may see the MySQL cluster is an aggregation of many components:
- one management server;
- many MySQL daemons that acts as “frontend”;
- many data nodes that store the real data.
This tutorial will guide you in the creation of a cluster with:
- one management node;
- two MySQL daemons;
- two data nodes.
Obviously you can expand this configuration simply adding the components you need. As stated at the beginning of this tutorial you can create all this setup on a single server (well you need 3 IPs on the server) or, and that would be very easy, you can split the MySQL cluster components on many servers.
Hi,
Thanks a lot. This demonstration is very useful to me and it is working fine. I have installed and tested the mysql clusters in my single linux machine.
Very useful………………..
Hi Karuna,
many thanks for your feedback: I tried all these steps for a clean installation but I’m also the writer of this tutorial
Bye
Apiero
Hi..
I am facing problem after completing cluster configuration, cluster runs properly but i dont see “Master” in [ndbd(NDB)] 2 nodes, both nodes show:
[ndbd(NDB)] 2 node(s)
id=2 @192.168.42.174 (mysql-5.1.23 ndb-6.2.15, starting, Nodegroup: 0)
id=3 @192.168.42.175 (mysql-5.1.23 ndb-6.2.15, starting, Nodegroup: 0)
I am using Redhat Enterprise 5.
Please Help
Hi,
did you verify that the firewall was disabled? Maybe it is blocking some ports
Try, as root, with:
/etc/init.d/iptables stop
/etc/init.d/ip6tables stop
Please let me know if it works or not.
Bye
Apiero
when trying to run the deamon in the final step get the following error msg:
/usr/lib/mysql_cluster/node_1/bin/mysqld: Table ‘mysql.plugin’ doesn’t exist
090122 18:01:18 [ERROR] Can’t open the mysql.plugin table. Please run mysql_upgrade to create it.
090122 18:01:18 InnoDB: Started; log sequence number 0 46409
090122 18:01:18 [Note] Starting Cluster Binlog Thread
090122 18:01:18 [ERROR] Fatal error: Can’t open and lock privilege tables: Table ‘mysql.host’ doesn’t exist
any idea why?
Hi Kagan,
did you use the exact versions of MySQL that I did? It looks like you missed the first part of page 6 (http://www.brucalipto.org/linux/how-to-install-a-mysql-cluster/6).
Please let me know if it works or not.
Bye
Apiero
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hi mate, i’ve managed to get almost everything working..
instead of doing everything on one host, i did it with 3 VMs, one is management, and 2 nodes/storage.
I got the nodes to connect without problems. but i can’t get the mysql database to connect. any ideas?
Cluster Configuration
———————
[ndbd(NDB)] 2 node(s)
id=2 @172.12.13.105 (Version: 7.0.6, starting, Nodegroup: 0)
id=3 @172.12.13.106 (Version: 7.0.6, starting, Nodegroup: 0)
[ndb_mgmd(MGM)] 1 node(s)
id=1 @mgm01 (Version: 7.0.6)
[mysqld(API)] 2 node(s)
id=4 (not connected, accepting connect from any host)
id=5 (not connected, accepting connect from any host)
thanks
Hi.
Do you think is it better a cluster or a replication (1 master – n slave) configuration in a situation of an high load website?
And have you ever tried mysql proxy as loadbalancer?
Hi,
I think that in a situation of an high load website a cluster would be better but keep in mind that the MySQL cluster has many “limitation”: not really limitations but its own rules. Keep in mind that MySQL is very fast so maybe a simple node could be sufficient.
I tried to look at MySQL proxy as loadbalancer but I did not understand how does it work: actually if I would need to setup something “big” with MySQL I would try MMM (Multi-Master Replication Manager) for MySQL[1].
Please let me know what was your choice!
Bye
Apiero
[1]http://mysql-mmm.org/
Hi,
(still alive ?)
im having a question …
i am running the ndb managment server and the mysql server one on the same server and the mysql server 2 on a second server.
if the server 1 (with mysql1 and mgmt server) crashes > there is data loss > what will append when i will restart the whole servers ?
the cluster system is only transmitting the queries ? isn’t it?
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