haproxy+keepalived安装配置说明

安装Keepalived

 yum install -y wget make gcc openssl-devel popt-devel

wget http://www.keepalived.org/software/keepalived-1.2.15.tar.gz
tar zxvf keepalived-1.2.15.tar.gz
cd keepalived-1.2.15
./configure --prefix=/usr/local/keepalived
make
make install

cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/

mkdir -p /etc/keepalived/
cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf
chmod +x /etc/init.d/keepalived
vi /etc/keepalived/keepalived.conf

! Configuration File for keepalived
global_defs {
   notification_email {
	[e-mail]
   }
   notification_email_from [e-mail]
   smtp_server mail.123.com
   smtp_connect_timeout 30
   router_id LVS_DEVEL
}

vrrp_script chk_haproxy {
    script "/etc/keepalived/chk_haproxy.sh"
    interval 2
    weight 2
}

vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 51
    priority 101
    advert_int 1
    mcast_src_ip 172.16.33.124

    authentication {
        auth_type PASS
        auth_pass 1111
    }

    track_script {
	chk_haproxy    #监测haproxy进程状态
    }
    virtual_ipaddress {
	172.16.33.123
    }
}
}

vi /etc/keepalived/chk_haproxy.sh

status=$(ps aux|grep haproxy | grep -v grep | grep -v bash | wc -l)
if [ "${status}" = "0" ]; then
    /etc/init.d/haproxy start

    status2=$(ps aux|grep haproxy | grep -v grep | grep -v bash |wc -l)

    if [ "${status2}" = "0"  ]; then
            /etc/init.d/keepalived stop
    fi
fi

service keepalived start
service keepalived stop

1、将Master上的keepalived停止

查看Master上的日志

tail -f /var/log/messages

Sep 23 01:24:34 181 Keepalived[3125]: Stopping Keepalived v1.2.8 (09/23,2013)
Sep 23 01:24:34 181 Keepalived_vrrp[3127]: VRRP_Instance(VI_1) sending 0 priority
Sep 23 01:24:34 181 Keepalived_vrrp[3127]: VRRP_Instance(VI_1) removing protocol VIPs.

发现Master释放了VIP

再查看Backup上的日志

Sep 23 01:20:26 182 Keepalived_vrrp[2887]: VRRP_Instance(VI_1) Transition to MASTER STATE
Sep 23 01:20:27 182 Keepalived_vrrp[2887]: VRRP_Instance(VI_1) Entering MASTER STATE
Sep 23 01:20:27 182 Keepalived_vrrp[2887]: VRRP_Instance(VI_1) setting protocol VIPs.
Sep 23 01:20:27 182 Keepalived_vrrp[2887]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 10.10.3.180
Sep 23 01:20:27 182 Keepalived_healthcheckers[2886]: Netlink reflector reports IP 10.10.3.180 added

发现Backup绑定了VIP

2、将Master上的keepalived启动

查看Master上的日志

tail -f /var/log/messages

Sep 23 01:27:56 181 Keepalived_vrrp[3450]: VRRP_Instance(VI_1) Entering MASTER STATE
Sep 23 01:27:56 181 Keepalived_vrrp[3450]: VRRP_Instance(VI_1) setting protocol VIPs.
Sep 23 01:27:56 181 Keepalived_vrrp[3450]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 10.10.3.180
Sep 23 01:27:56 181 Keepalived_healthcheckers[3449]: Netlink reflector reports IP 10.10.3.180 added

发现Master绑定了VIP

再查看Backup上的日志

Sep 23 01:21:15 182 Keepalived_vrrp[2887]: VRRP_Instance(VI_1) Received higher prio advert
Sep 23 01:21:15 182 Keepalived_vrrp[2887]: VRRP_Instance(VI_1) Entering BACKUP STATE
Sep 23 01:21:15 182 Keepalived_vrrp[2887]: VRRP_Instance(VI_1) removing protocol VIPs.
Sep 23 01:21:15 182 Keepalived_healthcheckers[2886]: Netlink reflector reports IP 10.10.3.180 removed

发现Backup释放了VIP

tcpdump vrrp 检查vrrp是否已正常工作，抓包会看到对应的ip
ip a
eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:74:b0:22 brd ff:ff:ff:ff:ff:ff
    inet 172.16.33.124/24 brd 172.16.33.255 scope global eth0
    inet 172.16.33.123/32 scope global eth0
    inet6 fe80::20c:29ff:fe74:b022/64 scope link 
       valid_lft forever preferred_lft forever


安装haproxy

#tar -xvzf haproxy-1.4.24.tar.gz

#cd haproxy-1.4.24

#make TARGET=linux26 ARCH=x86_64

#TARGET是指定内核版本，ARCH指定CPU架构，我使用的是64bit系统

#make install

 

#mkdir /etc/haproxy

#cp examples/haproxy.cfg /etc/haproxy

#cp examples/haproxy.init /etc/init.d/haproxy

#chmod +x /etc/init.d/haproxy

#ln -s /usr/local/sbin/haproxy /usr/sbin/

#mkdir /usr/share/haproxy

vi /etc/haproxy/haproxy.cfg

 

global

    log 127.0.0.1   local0  #日志输出配置，所有日志都记录在本机，通过local0输出

    log 127.0.0.1   local1 notice

    #log loghost    local0 info

    maxconn 4096                #最大连接数

    chroot /usr/share/haproxy   #改变当前工作目录。

    uid 99                  #所属用户的uid

    gid 99                  #所属运行的gid

    daemon                  #以后台形式运行haproxy

defaults

    log global

    mode    http

　　#默认的模式mode { tcp|http|health }，tcp是4层，http是7层，health只会返回OK

    option  httplog

    option  dontlognull

    option   redispatch

　　#当serverId对应的服务器挂掉后，强制定向到其他健康的服务器

    option  abortonclose

　　#当服务器负载很高的时候，自动结束掉当前队列处理比较久的链接

    retries 3               #两次连接失败就认为是服务器不可用

    maxconn 2000            #默认的最大连接数

    contimeout  5000        #连接超时

    clitimeout  50000       #客户端超时

    srvtimeout  50000       #服务器超时

frontend www

 bind *:80

#这里建议使用bind *:80的方式，要不然做集群高可用的时候有问题，vip切换到其他机器就不能访问了。

 acl web hdr(host) -i www.test.com

 #acl后面是规则名称，-i是要访问的域名，如果访问www.test.com这个域名就分发到下面的webserver 的作用域。

 use_backend webserver if web

acl url_static       path_beg       -i /static /images /javascript /stylesheets

acl url_static       path_end       -i .jpg .gif .png .css .js

acl url_dynamic      path_end       -i .php

use_backend static          if url_static

use_backend dynamic          if url_dynamic

 

backend webserver             #webserver作用域

    mode http

    balance   roundrobin     

    #banlance roundrobin 轮询，balance source 保存session值，支持static-rr，leastconn，first，uri等参数

    option  httpchk /index.html

    #检测文件，如果分发到后台index.html访问不到就不再分发给它

    server     web01 172.16.33.126:80  inter 3000 rise 2 fall 3 check maxconn 5000

　　 server     web02 172.16.33.127:80  inter 3000 rise 2 fall 3 check maxconn 5000

#listen web

# bind 172.16.33.123:80

# mode http

# server web01 172.16.33.126:80 check inter 2000 rise 2 fall 5

# server web02 172.16.33.127:80 check inter 2000 rise 2 fall 5

 

listen  mysql
        bind 0.0.0.0:23306    #代理端口
        mode tcp              #模式 TCP
        option mysql-check user root   #mysql健康检查  root为mysql登录用户名
        balance round robin            #调度算法
        server mysql1 10.0.31.40:4306 weight 1 check  inter 1s rise 2 fall 2 #健康检查加上check
        server mysql2 10.0.31.41:4306 weight 1 check  inter 1s rise 2 fall 2

listen admin_stats

        bind *:8080              #监听端口

        mode http                       #http的7层模式

        option httplog                  #采用http日志格式

        log 127.0.0.1 local0 err

        maxconn 10

        stats refresh 30s               #统计页面自动刷新时间

        stats uri /stats                #统计页面url

        stats realm XingCloud\ Haproxy  #统计页面密码框上提示文本

        stats auth admin:admin          #统计页面用户名和密码设置

        stats hide-version              #隐藏统计页面上HAProxy的版本信息