haproxy + keeplived

两台主机：
192.168.2.163
192.168.2.165

# yum安装haproxy
yum install haproxy
# cat /etc/haproxy/haproxy.cfg

实际使用的：
global
        log 127.0.0.1  local2
        chroot /var/lib/haproxy
        user haproxy
        group haproxy
        daemon
        nbproc 4
        maxconn 100000
        tune.ssl.default-dh-param 2048

defaults
        log    global
        option httplog
        option forwardfor
        option abortonclose
        option dontlognull
        retries 2
        maxconn 100000
        timeout connect 5s
        timeout client  10m
        timeout server  10m

listen  admin_stats
    mode http
    bind *:8899
    stats enable
    stats refresh 30s
    stats uri /stats
    stats realm XingCloud Haproxy
    stats auth admin:admin
    stats hide-version

listen www
    bind 0.0.0.0:8888 # 80端口被占用了,这里改用8888端口
    mode http
    balance roundrobin
    server www1 192.168.2.162:8080 check inter 2000 rise 30 fall 15
    server www2 192.168.2.164:8080 check inter 2000 rise 30 fall 15


#### 以下这些是参考的 ##########
global
    log 127.0.0.1 local0
    maxconn 100000
    user haproxy
    group haproxy
    daemon
    nbproc 4
    tune.ssl.default-dh-param 2048
defaults
    log global
    mode http
    #option httpclose
    option redispatch
    option forwardfor
    option abortonclose
    option dontlognull
    retries 2
    maxconn 100000
    #balance source
    timeout connect      10000
    timeout client       100000
    timeout server       100000

listen  admin_stats
    bind *:8899
    mode http
    option httplog
    log 127.0.0.1 local0 err
    maxconn 10
    stats refresh 30s
    stats uri /stats
    stats realm XingCloud Haproxy
    stats auth admin:admin
    stats hide-version	
listen redis
	bind 0.0.0.0:6379
	mode tcp  
	balance roundrobin  
	server node1 10.10.72.45:6379 minconn 4 maxconn 10000 check inter 2000 rise 2 fall 5
	server node2 10.10.72.46:6379 minconn 4 maxconn 10000 check inter 2000 rise 2 fall 5

listen gxpt-dsqz
        bind 0.0.0.0:52001
        mode http
        balance roundrobin
	   option httpchk GET /
        server node1 10.10.72.29:52001 minconn 100 maxconn 10000 check inter 2000 rise 1 fall 2
        server node2 10.10.72.30:52001 minconn 100 maxconn 10000 check inter 2000 rise 1 fall 2
        server node3 10.10.72.31:52001 minconn 100 maxconn 10000 check inter 2000 rise 1 fall 2
        server node4 10.10.72.32:52001 minconn 100 maxconn 10000 check inter 2000 rise 1 fall 2
        server node5 10.10.72.33:52001 minconn 100 maxconn 10000 check inter 2000 rise 1 fall 2
        server node6 10.10.72.34:52001 minconn 100 maxconn 10000 check inter 2000 rise 1 fall 2

listen gxpt-dsqz-ssl
        bind 0.0.0.0:54001 ssl crt /opt/cert/gxpt.pem verify none
        mode http
        balance roundrobin
        option httpchk GET /
        server node1 10.10.72.2:5001 ssl verify none minconn 100 maxconn 10000 check inter 2000 rise 1 fall 2
        server node2 10.10.72.3:5001 ssl verify none minconn 100 maxconn 10000 check inter 2000 rise 1 fall 2
# 在client增加cookie
backend backend_www
    option forwardfor
    cookie SERVERID insert indirect nocache  #插入session信息
    option     redispatch  #当后端rs挂了，可立即切换，不会出现503错误
    option httpchk HEAD / HTTP/1.0
    balance roundrobin
    server www1 192.168.1.198:80 cookie www1check inter 2000 rise 30 fall 15
    server www2 192.168.1.52:80 cookie www2 checkinter 2000 rise 30 fall 15

# balance source 根据原ip，经过hash计算后，指定后端固定的rs
backend backend_www
    option forwardfor
    option httpchk HEAD / HTTP/1.0
    balance source
    server www1 192.168.1.198:80 check inter2000 rise 30 fall 15
    server www2 192.168.1.52:80check inter 2000 rise 30 fall 15

frontend frontend_58001
        bind 0.0.0.0:58001
        mode http
        option tcplog
        acl fpcloud-yypt path_beg  -i /fpcloud-yypt
        use_backend fpcloud-yypt if fpcloud-yypt
        acl fpcloud-web path_beg  -i /fpcloud-web
        use_backend fpcloud-web if fpcloud-web

backend fpcloud-web
        mode http
        balance leastconn
        server node1 10.72.1.233:58001 minconn 100 maxconn 10000 check inter 2000 rise 1 fall 2
        server node2 10.72.1.241:58001 minconn 100 maxconn 10000 check inter 2000 rise 1 fall 2

backend fpcloud-yypt
        mode http
        balance leastconn
        server node1 10.72.1.233:58002 minconn 100 maxconn 10000 check inter 2000 rise 1 fall 2
        server node2 10.72.1.241:58002 minconn 100 maxconn 10000 check inter 2000 rise 1 fall 2

# 启动haproxy
systemctl start haproxy.service
systemctl enable haproxy.service

2	配置haproxy 日志
# 编辑haproxy配置文件,这一步配置文件中已经写过了，这里不用再修改了
# vim haproxy.cfg 
global
log 127.0.0.1 local2
#local2是设备，对应于/etc/rsyslog.conf中的配置，默认是info的日志级别
defaults
log global  # 必须配置
option httplog  # 配置

# 编辑系统日志配置
# 为haproxy创建一个独立的配置文件
# vim  /etc/rsyslog.d/haproxy.conf
$ModLoad imudp
$UDPServerRun 514
local2.* /opt/var/logs/haproxy/haproxy.log
local2.warning  /opt/var/logs/haproxy/haproxy_warn.log
# 如果不加下面的的配置则除了在/opt/var/logs/haproxy/haproxy.log 中写入日志外，也会写入message文件

# vim /etc/rsyslog.conf
 默认有下面的设置，会读取 /etc/rsyslog.d/*.conf目录下的配置文件
 $IncludeConfig /etc/rsyslog.d/*.conf

# 禁止写入message
*.info;mail.none;authpriv.none;cron.none;local2.none                /var/log/messages

# mkdir /opt/var/logs/haproxy/ -p

# 配置rsyslog的主配置文件，开启远程日志
# vim /etc/sysconfig/rsyslog
 SYSLOGD_OPTIONS="-c 2 -r -m 0"
 #-c 2 使用兼容模式，默认是 -c 5
 #-r 开启远程日志
 #-m 0 标记时间戳。单位是分钟，为0时，表示禁用该功能
 
 
# 重启haproxy和rsyslog服务

# centos7
# systemctl restart rsyslog
# systemctl restart haproxy
# systemctl enable rsyslog
3	配置haproxy日志轮转
# vim /etc/logrotate.d/haproxy
/opt/var/logs/haproxy/haproxy*.log {
    daily
    rotate 7
    create
    missingok
    notifempty
    dateext
    compress
    sharedscripts
    postrotate
#        /bin/kill -HUP `cat /var/run/syslogd.pid 2> /dev/null` 2> /dev/null || true
#        /bin/kill -HUP `cat /var/run/rsyslogd.pid 2> /dev/null` 2> /dev/null || true        
    /etc/init.d/rsyslog restart
    endscript
}

参考系统默认配置：
/opt/var/logs/haproxy/*.log {
    daily
    rotate 10
    missingok
    notifempty
    compress
    sharedscripts
    postrotate
        /bin/kill -HUP `cat /var/run/syslogd.pid 2> /dev/null` 2> /dev/null || true
        /bin/kill -HUP `cat /var/run/rsyslogd.pid 2> /dev/null` 2> /dev/null || true
    endscript
}

# 强制轮转测试
# logrotate -vf /etc/logrotate.d/haproxy

安装keeplived

yum -y install epel-release
yum -y install keepalived

# 163主机操作，作为master
# vim /etc/keepalived/keepalived.conf
global_defs {
	router_id haproxy_ha1
}
vrrp_script chk_maintaince_down {
   script "[[ -f /etc/keepalived/down ]] && exit 1 || exit 0"
   interval 1
   weight 2
}
vrrp_script chk_haproxy {
	script "/etc/keepalived/scripts/haproxy_check.sh"
	interval 2
	timeout 2
	fall 3
}
vrrp_instance VI_1 {
	state MASTER
	interface ens33
	virtual_router_id 29
	priority 100
	authentication {
		auth_type PASS
		auth_pass 1e3459f77aba4ded
	}
    track_interface {
       ens33
    }
    virtual_ipaddress {
        192.168.2.250 dev ens33 label ens33:1
    }
	track_script {
		chk_haproxy
	}
	notify_master "/etc/keepalived/scripts/haproxy_master.sh"
}

165主机操作，作为back

# vim /etc/keepalived/keepalived.conf
global_defs {
	router_id haproxy_ha1
}
vrrp_script chk_maintaince_down {
   script "[[ -f /etc/keepalived/down ]] && exit 1 || exit 0"
   interval 1
   weight 2
}
vrrp_script chk_haproxy {
	script "/etc/keepalived/scripts/haproxy_check.sh"
	interval 2
	timeout 2
	fall 3
}
vrrp_instance VI_1 {
	state BACK # 与上面的不同
	interface ens33
	virtual_router_id 29
	priority 90 # 比上面的小
	authentication {
		auth_type PASS
		auth_pass 1e3459f77aba4ded
	}
    track_interface {
       ens33
    }
    virtual_ipaddress {
        192.168.2.250 dev ens33 label ens33:1
    }
	track_script {
		chk_haproxy
	}
	notify_master "/etc/keepalived/scripts/haproxy_master.sh"
}
	

两台主机都需要做的操作：

mkdir -p /etc/keepalived/scripts
mkdir -p /opt/var/logs/keepalived/

# vim /etc/keepalived/scripts/haproxy_check.sh
#!/bin/bash
LOGFILE="/opt/var/logs/keepalived/keepalived-haproxy-state.log"
if [ `ps -C haproxy --no-header |wc -l` -eq 0 ];then
	date >> $LOGFILE
	systemctl restart haproxy
	sleep 1
	if [ `ps -C haproxy --no-header |wc -l` -eq 0 ];then
		echo "fail: check_haproxy status" >> $LOGFILE
		exit 1
	else
		echo "success: restart_haproxy status" >> $LOGFILE
		exit 0
	fi
else
	exit 0
fi


# vim /etc/keepalived/scripts/haproxy_master.sh
#!/bin/bash
LOGFILE="/opt/var/logs/keepalived/keepalived-haproxy-state.log"
echo "Being Master ..." >> $LOGFILE


chmod a+x /etc/keepalived/scripts/haproxy_check.sh /etc/keepalived/scripts/haproxy_master.sh

两台主机启动keepalived

163主机网卡信息

2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:50:56:3a:cc:20 brd ff:ff:ff:ff:ff:ff
    inet 192.168.2.163/24 brd 192.168.2.255 scope global noprefixroute ens33
       valid_lft forever preferred_lft forever
    inet 192.168.2.250/32 scope global ens33:1
       valid_lft forever preferred_lft forever
    inet6 fe80::8041:19f:b29:7354/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever

165主机网卡信息

2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:50:56:35:92:64 brd ff:ff:ff:ff:ff:ff
    inet 192.168.2.165/24 brd 192.168.2.255 scope global noprefixroute ens33
       valid_lft forever preferred_lft forever
    inet6 fe80::7320:404e:a7f2:6fbf/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
    inet6 fe80::6435:91f7:6c5:fa28/64 scope link tentative noprefixroute dadfailed 
       valid_lft forever preferred_lft forever
    inet6 fe80::8ebe:5815:b0b3:d833/64 scope link tentative noprefixroute dadfailed 
       valid_lft forever preferred_lft forever

haproxy故障漂移测试
目前脚本的作用是在keepalive vip 那台服务器 停止haproxy服务，会立刻再启动haproxy服务，除非这台主机关机，没法再启动haproxy服务，
此时keepalive vip 才会漂移到另外一台haproxy服务上。
当原有主机再次启动haproxy服务后，keepalive vip 又会回来。

问题：
1.在keepalive vip 漂移过程中会有短暂的服务访问缓慢的情况
2.haproxy中设置的是轮询，火狐浏览器上会看到效果，谷歌浏览器上效果不明显