使用Haproxy对MariaDB做负载均衡

狼狼

　　服务器环境:

　　

　　安装
vim /etc/apt/sources.list.d/mariadb.list     # 添加以下两句
deb http://mirror.yongbok.net/mariadb/repo/5.5/ubuntu precise main
deb-src http://mirror.yongbok.net/mariadb/repo/5.5/ubuntu precise main
apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 0xcbcb082a1bb943db
apt-get update
apt-get install mariadb-server-5.5　　/etc/mysql/my.cnf

　　多实例配置文件:3306,3307,3308
　　

[mysqld_multi]
mysqld      = /usr/bin/mysqld_safe
mysqladmin  = /usr/bin/mysqladmin
user        = root           # 指定用于启动、停止mysql实例的用户
log     = /var/log/mysql/mysqld_multi.log  
[client]
port        = 3306
socket      = /var/run/mysql/mysql.sock
default-character-set   = utf8
[mysqld3306]
port        = 3306
socket      = /var/run/mysql/mysql.sock
pid-file    = /var/run/mysql/mysql.pid
datadir     = /var/lib/mysql/3306
skip-external-locking
key_buffer_size = 16M
max_allowed_packet = 1M
table_open_cache = 64
sort_buffer_size = 512K
net_buffer_length = 8K
read_buffer_size = 256K
read_rnd_buffer_size = 512K
myisam_sort_buffer_size = 8M
default-storage-engine  = MyISAM
character-set-server    = utf8
skip-name-resolve
collation-server        = utf8_general_ci
log-error               = /var/log/mysql/mysqld-error.log
log-slow-admin-statements
long-query-time         = 3
slow-query-log
slow-query-log-file     = /var/log/mysql/mysqld-slow.log
innodb_buffer_pool_size=1G
innodb_additional_mem_pool_size=20M
max_connections     = 1000
tmpdir      = /tmp/
server-id   = 2
log-slave-updates
log-bin         = mysql-bin
binlog_format   = mixed
relay_log       = mysql-relay-bin
replicate-do-db        = wordpress
replicate-ignore-db        = mysql
replicate-ignore-db        = information_schema
replicate-ignore-db        = performance_schema
replicate-ignore-db        = test
[mysqldump]
quick
max_allowed_packet = 16M
[mysqld3307]
port        = 3307
socket      = /var/run/mysql/mysql-3307.sock
pid-file    = /var/run/mysql/mysql-3307.pid
datadir     = /var/lib/mysql/3307
skip-external-locking
key_buffer_size = 16M
max_allowed_packet = 1M
table_open_cache = 64
sort_buffer_size = 512K
net_buffer_length = 8K
read_buffer_size = 256K
read_rnd_buffer_size = 512K
myisam_sort_buffer_size = 8M
default-storage-engine  = MyISAM
character-set-server    = utf8
skip-name-resolve
collation-server        = utf8_general_ci
log-error               = /var/log/mysql/mysqld-error-3307.log
log-slow-admin-statements
long-query-time         = 3
slow-query-log
slow-query-log-file     = /var/log/mysql/mysqld-slow-3307.log
innodb_buffer_pool_size=1G
innodb_additional_mem_pool_size=20M
max_connections     = 1000
tmpdir      = /tmp/
server-id   = 2
log-slave-updates
log-bin         = mysql-bin
binlog_format   = mixed
relay_log       = mysql-relay-bin
replicate-do-db        = futurestar
replicate-do-db        = verywx
replicate-ignore-db        = mysql
replicate-ignore-db        = information_schema
replicate-ignore-db        = performance_schema
replicate-ignore-db        = test
[mysqldump]
quick
max_allowed_packet = 16M
[mysqld3308]
port        = 3308
socket      = /var/run/mysql/mysql-3308.sock
pid-file    = /var/run/mysql/mysql-3308.pid
datadir     = /var/lib/mysql/3308
skip-external-locking
key_buffer_size = 16M
max_allowed_packet = 1M
table_open_cache = 64
sort_buffer_size = 512K
net_buffer_length = 8K
read_buffer_size = 256K
read_rnd_buffer_size = 512K
myisam_sort_buffer_size = 8M
default-storage-engine  = MyISAM
character-set-server    = utf8
skip-name-resolve
collation-server        = utf8_general_ci
log-error               = /var/log/mysql/mysqld-error-3308.log
log-slow-admin-statements
long-query-time         = 3
slow-query-log
slow-query-log-file     = /var/log/mysql/mysqld-slow-3308.log
innodb_buffer_pool_size=1G
innodb_additional_mem_pool_size=20M
max_connections     = 1000
tmpdir      = /tmp/
server-id   = 2
log-slave-updates
log-bin         = mysql-bin
binlog_format   = mixed
relay_log       = mysql-relay-bin
replicate-do-db        = futurestar
replicate-do-db        = verywx
replicate-ignore-db        = mysql
replicate-ignore-db        = information_schema
replicate-ignore-db        = performance_schema
replicate-ignore-db        = test
[mysqldump]
quick
max_allowed_packet = 16M
[mysql]
socket  = /var/run/mysql/mysql.sock
auto-rehash
default-character-set   = utf8
[myisamchk]
key_buffer_size = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M
[mysqlhotcopy]
interactive-timeout　　

　　初始化数据库文件:
mysql_install_db --datadir=/var/lib/mysql/3306 --user=mysql
mysql_install_db --datadir=/var/lib/mysql/3307 --user=mysql
mysql_install_db --datadir=/var/lib/mysql/3308 --user=mysql　　

　　启动数据库:
mysqld_multi start 3306
mysqld_multi start 3307
mysqld_multi start 3308　　

　　查看启动情况:
netstat -tunlp | grep -E '(3306|3307|3308)'

　　

　　

　　安装Haporxy
apt-get install haproxy　　然后vim etc/default/haproxy
　　修改 ENABLED=0 -> ENABLED=1 保存。
　　

　　修改haproxy配置文件:
　　vim /etc/haproxy/haproxy.cfg
# this config needs haproxy-1.1.28 or haproxy-1.2.1
global
log 127.0.0.1   local0
log 127.0.0.1   local1 notice
#log loghost    local0 info
maxconn 4096
#chroot /usr/share/haproxy
user haproxy
group haproxy
daemon
#debug
#quiet
defaults
log global
mode    http
#option httplog
option  dontlognull
retries 3
option redispatch
maxconn 2000
contimeout  5000
clitimeout  50000
srvtimeout  50000
listen  mysql 0.0.0.0:6666
mode tcp
option mysql-check user root
balance roundrobin
server  mysql_1 127.0.0.1:3306 weight 1 check inter 1s rise 2 fall 5
server  mysql_2 127.0.0.1:3307 weight 1 check inter 1s rise 2 fall 5
server  mysql_3 127.0.0.1:3308 weight 1 check inter 1s rise 2 fall 5
listen stats
mode http
bind 0.0.0.0:8888
stats enable
stats uri /dbs
stats realm Global\ statistics
stats auth admin:admin
errorfile   400 /etc/haproxy/errors/400.http
errorfile   403 /etc/haproxy/errors/403.http
errorfile   408 /etc/haproxy/errors/408.http
errorfile   500 /etc/haproxy/errors/500.http
errorfile   502 /etc/haproxy/errors/502.http
errorfile   503 /etc/haproxy/errors/503.http
errorfile   504 /etc/haproxy/errors/504.http　　执行命令:

/etc/init.d/haproxy start　　

　　测试结果:

　　

　　查看haproxy监控页面:
　　

　　配置成功。