MySQL cluster - Load Balancing

MySQL Cluster
Purpose:
cluster for Mysql
load balancing cho Mysql
scalability in future
Model: 4 nodes, 2 node cluster, 2 node load balancing ( 1 node master, one node backup)
1 virtual ip (VIP) listen connection
Db1 192.168.1.11
Db2 192.168.1.12
Lb1 192.168.1.21
Lb2 192.168.1.22
Db 192.168.1.20

Sychronize host file:

# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
192.168.1.10 db1.hbn.local db1
::1 localhost6.localdomain6 localhost6
192.168.1.11 db2.hbn.local db2
192.168.1.21 lb1.hbn.local lb1
192.168.1.22 lb2.hbn.local lb2
192.168.1.20 db.hbn.local db

Download MySQL cluster at: dev.mysql.com/downloads/cluster

On lb1 and lb2, manager node:
[root@lb1 ~]# rpm -Uvh MySQL-Cluster-gpl-*
Preparing... ########################################### [100%]
1:MySQL-Cluster-gpl-tools########################################### [ 50%]
2:MySQL-Cluster-gpl-manag########################################### [100%]

#mkdir –p /var/lib/mysql-cluster ; chứa cluster log

#mkdir -p /usr/local/mysql-cluster ; chứa file cấu hình

#cd /usr/local/mysql-cluster

#vi config.ini

[ndb_mgmd]
Id=1
HostName=192.168.1.21 # IP address của máy manager
DataDir=/var/lib/mysql-cluster

[ndb_mgmd]
Id=2
HostName=192.168.1.22 # IP address của máy manager
DataDir=/var/lib/mysql-cluster

[ndbd default]
NoOfReplicas=2
DataDir=/var/lib/mysql-cluster

[ndbd]
Id=3
HostName=192.168.1.11

[ndbd]
Id=4
HostName=192.168.1.12

[mysqld]
HostName=192.168.1.11

[mysqld]
HostName=192.168.1.12

#ndb_mgmd --config-file=/usr/local/mysql-cluster/config.ini
Test:

#ndb_mgm
ndb_mgm> SHOW

Connected to Management Server at: localhost:1186
Cluster Configuration
---------------------
[ndbd(NDB)] 2 node(s)
id=3 (not connected, accepting connect from 192.168.1.11)
id=4 (not connected, accepting connect from 192.168.1.12)

[ndb_mgmd(MGM)] 2 node(s)
id=1 (not connected, accepting connect from 192.168.1.21)
id=2 @192.168.1.22 (mysql-5.1.47 ndb-7.1.5)

[mysqld(API)] 2 node(s)
id=5 (not connected, accepting connect from 192.168.1.11)
id=6 (not connected, accepting connect from 192.168.1.12)

2 node show only 2 storage node ( in this lab is mysql node) started

On storage nodes và sql nodes, db1 and db2
Install: MySQL-Cluster-gpl-storage-7.1.5-1.rhel5.i386.rpm
MySQL-Cluster-gpl-tools-7.1.5-1.rhel5.i386.rpm
MySQL-Cluster-gpl-server-7.1.5-1.rhel5.i386.rpm
MySQL-Cluster-gpl-client-7.1.5-1.rhel5.i386.rpm

#vi /etc/my.cnf

[mysqld]
ndbcluster
ndb-connectstring = "host=192.168.1.21,host=192.168.1.22"

[ndb_mgm]
connect-string = "host=192.168.1.21,host=192.168.1.22"

[ndbd]
connect-string = "host=192.168.1.21,host=192.168.1.22"

#mkdir -p /var/lib/mysql-cluster

#ndbd --initial
# /etc/init.d/mysql start

#mysqladmin -u root password '123456'

test on manager node:

#ndb_mgm
ndb_mgm> show
ndb_mgm> ALL STATUS

Node 3: started (mysql-5.1.47 ndb-7.1.5)
Node 4: started (mysql-5.1.47 ndb-7.1.5)
ndb_mgm> SHOW
Cluster Configuration
---------------------
[ndbd(NDB)] 2 node(s)
id=3 @192.168.1.11 (mysql-5.1.47 ndb-7.1.5, Nodegroup: 0, Master)
id=4 @192.168.1.12 (mysql-5.1.47 ndb-7.1.5, Nodegroup: 0)

[ndb_mgmd(MGM)] 2 node(s)
id=1 @192.168.1.21 (mysql-5.1.47 ndb-7.1.5)
id=2 @192.168.1.22 (mysql-5.1.47 ndb-7.1.5)

[mysqld(API)] 2 node(s)
id=5 @192.168.1.11 (mysql-5.1.47 ndb-7.1.5)
id=6 @192.168.1.12 (mysql-5.1.47 ndb-7.1.5)

create database:
mysql -p
mysql> CREATE DATABASE nhansu;
mysql> use nhansu;
Database changed
mysql> CREATE TABLE phongban (tenp char(12)) ENGINE=NDBCLUSTER;
Query OK, 0 rows affected (0.52 sec)

mysql> INSERT INTO phongban () VALUES ("Ke toan");
Query OK, 1 row affected (0.19 sec)

mysql> INSERT INTO phongban () VALUES ("Kinh doanh");
Query OK, 1 row affected (0.02 sec)

mysql> INSERT INTO phongban () VALUES ("Ky thuat");
Query OK, 1 row affected (0.01 sec)

mysql> use nhansu;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

mysql>

MySQL load balancing:
On db1, db2

#vi /etc/sysconfig/network-scripts/ifcfg-lo:0

DEVICE=lo:0
IPADDR=192.168.1.20
NETMASK=255.255.255.255
NETWORK=192.168.1.0
BROADCAST=192.168.104.255
ONBOOT=yes
NAME=loopback

#ifup lo

Install arptable to disable arp broadcast
arptables_jf-0.0.8-8.i386.rpm
arptables-noarp-addr-0.99.2-1.rh.el.um.1.noarch.rpm

/etc/init.d/arptables_jf stop
/usr/sbin/arptables-noarp-addr 192.168.1.20 start
/etc/init.d/arptables_jf save
/etc/init.d/arptables_jf start
/sbin/chkconfig --level 2345 arptables_jf on

On lb1, lb2
yum install libnet heartbeat-* ipvsadm -y
cp /usr/share/doc/heartbeat-2.1.3/authkeys /etc/ha.d/
cp /usr/share/doc/heartbeat-2.1.3/ha.cf /etc/ha.d/
cp /usr/share/doc/heartbeat-2.1.3/haresources /etc/ha.d

vi /etc/ha.d/authkeys
auth 1
1 sha1 123456

vi /etc/ha.d/ha.cf

logfacility local0
bcast eth0
mcast eth0 225.0.0.1 694 1 0
auto_failback off
respawn hacluster /usr/lib/heartbeat/ipfail
apiauth ipfail gid=haclient uid=hacluster
node lb1.hbn.local
node lb2.hbn.local

+ vi /etc/ha.d/ldirectord.cf

checktimeout=10
checkinterval=2
autoreload=no
logfile="local0"
quiescent=yes
virtual = 192.168.1.20:3306
service = mysql
real = 192.168.104.21:3306 gate
real = 192.168.104.22:3306 gate
checktype = negotiate
login = "admin"
passwd = "123456"
database = "nhansu"
request = "SELECT * FROM phongban"
scheduler = wrr

+ vi /etc/ha.d/haresources
on lb1:

Lb1.hbn.local \
ldirectord::ldirectord.cf \
LVSSyncDaemonSwap::master \
IPaddr2::192.168.1.20/24/eth0/192.168.1.255

on lb2:

Lb2.hbn.local \
ldirectord::ldirectord.cf \
LVSSyncDaemonSwap::master \
IPaddr2::192.168.1.20/24/eth0/192.168.1.255

#chmod 600 /etc/ha.d/authkeys
# service heartbeat Start

#service ldirectord stop

#ipvsadm -L –n

Txt tutorial: http://www.mediafire.com/?5klhsf1zrs8gykn
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Thanks for reading
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All my Lab:
Linux Lab -- window and Cisco Lab
to be continued - I will update more.

Nam Habach