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  • keepalived+HAproxy集群部署

    keepalived是一种几群的高可用软件,可以为我们提供高可用服务,它可以实现心跳监测和浮动资源管理;

    它是基于VRRP的的冗余技术;接下来我们进行keepalived+HAproxy的高可用和负载均衡的集群部署;

    1.准备好2台虚拟机作为keepalived+Haproxy服务器;2台作为httpd web服务器;

    HAproxy的部署这里就略过了,不明白的可以看我上一个笔记https://www.cnblogs.com/loganSxb/p/11285966.html

    我们在1台keepalived服务器上进行配置,然后再scp到另一台服务器上;

    编译源码keepalived;

    [root@sxb-1 keepalived-1.3.5]# tar xf keepalived-1.3.5.tar.gz ^C
    [root@sxb-1 keepalived-1.3.5]# ./configure --prefix=/usr/local/keepalived^C

    make&& maek install

    如果失败问题是:OpenSSL is not properly installed on your system;执行:yum -y install openssl-devel

     编辑配置文件;

    [root@sxb-1 keepalived]# pwd
    /usr/local/keepalived/etc/keepalived
    ! Configuration File for keepalived
    
    global_defs {
       notification_email {
         root@zhaoyg.com   #出现问题给she发送邮件
       }
       notification_email_from keepalived@zhaoyg.com   #发件人信息
       smtp_server 127.0.0.1
       smtp_connect_timeout 30
       router_id Director1      #这台keppalived的名字
    }
    
    vrrp_instance VI_1 {
        state MASTER
        interface ens33   #根据自己网卡进行修改
        virtual_router_id 51
        priority 150
        advert_int 1
        authentication {
            auth_type PASS
            auth_pass 1111
        }
        virtual_ipaddress {
            172.29.210.150 /16
        }
    }

    我们还需要制作一个keepalived的启动文件;

    [root@sxb-1 keepalived]# vim /usr/lib/systemd/system/keepalived.service
    [Unit]
    Description=LVS and VRRP High Availability Monitor
    After=syslog.target network-online.target
    
    [Service]
    Type=forking
    PIDFile=/var/run/keepalived.pid
    KillMode=process
    EnvironmentFile=-/usr/local/keepalived/etc/sysconfig/keepalived
    ExecStart=/usr/local/keepalived/sbin/keepalived -f /usr/local/keepalived/etc/keepalived/keepalived.conf $KEEPALIVED_OPTIONS
    ExecReload=/bin/kill -HUP $MAINPID
    
    [Install]
    WantedBy=multi-user.target

    我们将keepalived ,启动文件scp到另一台服务器上,修改一下就可以了;

    [root@sxb-1 keepalived]# scp -r /usr/local/keepalived/ 192.168.88.104:/usr/loca

    我们来到另一台服务器上

    ! Configuration File for keepalived
    
    global_defs {
       notification_email {
            songxuebin128@163.com
       }
       notification_email_from localhost@uplooking.com
       smtp_server 127.0.0.1
       smtp_connect_timeout 30
       router_id haproxy2
       vrrp_skip_check_adv_addr
       vrrp_strict
       vrrp_garp_interval 0
       vrrp_gna_interval 0
    }  
    
    vrrp_instance VI_1 {
        state BACKUP
        interface ens33
        virtual_router_id 51
        priority 50
        advert_int 1
        authentication {
        auth_type PASS
            auth_pass 1111
        }
        virtual_ipaddress {
            192.168.88.230 dev ens33
        }
    }

    启动keppalived;

    我们的master上出现了我们当时使用的浮动IP192.168.88.230

    [root@sxb-1 keepalived]# ip addr s
    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
        link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
        inet 127.0.0.1/8 scope host lo
           valid_lft forever preferred_lft forever
        inet6 ::1/128 scope host 
           valid_lft forever preferred_lft forever
    2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
        link/ether 00:0c:29:88:9d:40 brd ff:ff:ff:ff:ff:ff
        inet 192.168.88.101/24 brd 192.168.88.255 scope global noprefixroute ens33
           valid_lft forever preferred_lft forever
        inet 192.168.88.230/32 scope global ens33
           valid_lft forever preferred_lft forever
        inet6 fe80::20c:29ff:fe88:9d40/64 scope link 
           valid_lft forever preferred_lft forever

     我们用httpd服务进行测试;

    [root@105 ~]# curl 192.168.88.230
    103
    [root@105 ~]# curl 192.168.88.230
    102
    [root@105 ~]# curl 192.168.88.230
    103
    [root@105 ~]# curl 192.168.88.230
    102

    现在我们将master停掉,来测试

    [root@sxb-1 keepalived]# systemctl stop keepalived.service

    查看一下BACKUP的浮动IP,可以看到过来了;

    [root@sxb-4 ~]# ip addr s
    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
        link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
        inet 127.0.0.1/8 scope host lo
           valid_lft forever preferred_lft forever
        inet6 ::1/128 scope host 
           valid_lft forever preferred_lft forever
    2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
        link/ether 00:0c:29:5b:71:db brd ff:ff:ff:ff:ff:ff
        inet 192.168.88.104/24 brd 192.168.88.255 scope global noprefixroute ens33
           valid_lft forever preferred_lft forever
        inet 192.168.88.230/24 scope global secondary ens33
           valid_lft forever preferred_lft forever
        inet6 fe80::20c:29ff:fe5b:71db/64 scope link 
           valid_lft forever preferred_lft forever

    我们继续测试;master故障后并没有影响我们的HAproxy集群;

    [root@105 ~]# curl 192.168.88.230
    102
    [root@105 ~]# curl 192.168.88.230
    103
    [root@105 ~]# curl 192.168.88.230
    102
    [root@105 ~]# curl 192.168.88.230
    103

    到这里有一个问题;就是keepalived的master恢复后,会出现抢夺问题(“王者归来”);这里我们就要看实际情况来定夺要不要抢夺,当两台服务器的配置一样,那就不用进行抢夺(forever preferred_lft forever);

    我们恢复master浮动IP就会自动回到master上;

    [root@sxb-1 keepalived]# systemctl start keepalived.service 
    [root@sxb-1 keepalived]# ip addr show
    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
        link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
        inet 127.0.0.1/8 scope host lo
           valid_lft forever preferred_lft forever
        inet6 ::1/128 scope host 
           valid_lft forever preferred_lft forever
    2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
        link/ether 00:0c:29:88:9d:40 brd ff:ff:ff:ff:ff:ff
        inet 192.168.88.101/24 brd 192.168.88.255 scope global noprefixroute ens33
           valid_lft forever preferred_lft forever
        inet 192.168.88.230/24 scope global secondary ens33
           valid_lft forever preferred_lft forever
        inet6 fe80::20c:29ff:fe88:9d40/64 scope link 
           valid_lft forever preferred_lft forever
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  • 原文地址:https://www.cnblogs.com/loganSxb/p/11294946.html
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