使用HAProxy作为MongoDB分片集群mongos负载均衡

MongoDB分片集群的入口mongos自身没有failover机制。官方建议是将mongos和应用服务器部署在一起，多个应用服务器就要部署多个mongos实例，这样很是不方便。还可以使用LVS或者HAProxy来实现多个mongos的failover机制，但是一定要注意使用client affinity即客户端关联特性。global
chroot /data/app_platform/haproxy/share/
log 127.0.0.1 local3 info
daemon
user haproxy
group haproxy
pidfile /var/run/haproxy.pid
nbproc 1
stats socket /tmp/haproxy level admin
stats maxconn 20
node master_loadbalance1
description lb1
maxconn 65536
nosplice
spread-checks 3

defaults
log global
mode tcp
option abortonclose
option allbackups
option tcpka
option redispatch
retries 3
timeout check 60s
timeout connect 600s
timeout queue 600s
timeout server 600s
timeout tarpit 60s
timeout client 600s

frontend mongos_pool 0.0.0.0:28018
mode tcp
maxconn 32768
no option dontlognull
option tcplog
log global
option log-separate-errors
default_backend mongos_pool

backend mongos_pool
mode tcp
balance source
default-server inter 2s fastinter 1s downinter 5s slowstart 60s rise 2 fall 5 weight 30

server gintama-xxx-mongos1 192.168.100.74:28018 check maxconn 2000
server gintama-xxx-mongos2 192.168.100.75:28018 check maxconn 2000注意使用
balance sourceMongoDB 3.0 正式版发布下载 http://www.linuxidc.com/Linux/2015-03/114414.htmCentOS编译安装MongoDB http://www.linuxidc.com/Linux/2012-02/53834.htmCentOS 编译安装 MongoDB与mongoDB的php扩展 http://www.linuxidc.com/Linux/2012-02/53833.htmCentOS 6 使用 yum 安装MongoDB及服务器端配置 http://www.linuxidc.com/Linux/2012-08/68196.htmUbuntu 13.04下安装MongoDB2.4.3 http://www.linuxidc.com/Linux/2013-05/84227.htmMongoDB入门必读（概念与实战并重） http://www.linuxidc.com/Linux/2013-07/87105.htmUbunu 14.04下MongoDB的安装指南 http://www.linuxidc.com/Linux/2014-08/105364.htm《MongoDB 权威指南》（MongoDB: The Definitive Guide）英文文字版[PDF] http://www.linuxidc.com/Linux/2012-07/66735.htmNagios监控MongoDB分片集群服务实战 http://www.linuxidc.com/Linux/2014-10/107826.htm基于CentOS 6.5操作系统搭建MongoDB服务 http://www.linuxidc.com/Linux/2014-11/108900.htmMongoDB 的详细介绍：请点这里
MongoDB 的下载地址：请点这里本文永久更新链接地址