使用Haproxy对MariaDB做负载均衡

太阳不下山

　　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。