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  • Nginx +keepalived

    Nginx +keepalived

     

    配置高可用的Nginx

    准备环境:

    节点node17,node18

     

    lftp 172.16.0.1:/pub/Sources/6.x86_64/nginx

     

    [root@node17 ~]# rpm -ivh nginx-1.6.2-1.el6.ngx.x86_64.rpm

     

    [root@node17 ~]# scp -rp nginx-1.6.2-1.el6.ngx.x86_64.rpm node18:/root

     

    [root@node18 ~]# rpm -ivh nginx-1.6.2-1.el6.ngx.x86_64.rpm

     

    为两个 节点上都配置默认的网页,来以示区别

     

    [root@node17 html]# vim index.html

    <h1>node15.stu21.com</h1>

     

    [root@node18 html]# vim index.html

    <h1>node2.stu21.com </h1>

     

    接下来启动两个 节点上的nginx 服务:

     

    [root@node17 html]# service nginx start;ssh node18 'service nginx start';

     

    测试:

     

     

     

     

     

     

     

     

     

    题:我们一般进行主从切换测试时都是关闭keepalived或关闭网卡接口,有没有一种方法能实现在不关闭keepalived下或网卡接口来实现维护 呢?以及监测nginx的状态?? 方法肯定是有的,在keepalived新版本中,支持脚本vrrp_srcipt,具体如何使用大家可以man keepalived.conf查看。下面我们来演示一下具体怎么实现。

     

        vrrp_srcipt chk_schedown { 

       script "[ -e /etc/keepalived/down ] && exit 1 || exit 0"  

       interval 1 #监控间隔  

       weight -5 #减小优先级  

       fall 2 #监控失败次数  

       rise 1 #监控成功次数  

    }

        vrrp_script chk_nginx {

            script "killall -0 nginx"

            interval 1

            weight -5

            fall 2

            rise 1

    }

     

    (2).执行脚本

        track_script {

       chk_schedown #执行chk_schedown脚本

         chk_nginx #执行chk_nginx脚本

    }

     

     

    node17:我就继续沿用apache+lvs+keepalived的节点node17上keepalived相关配置,稍作修改

    [root@node17 ~]# cat /etc/keepalived/keepalived.conf

    ! Configuration File for keepalived

     

    global_defs {

    notification_email {

        root@node17.stu21.com

        root@node18.stu21.com #配置管理员邮箱

    }

    notification_email_from kaadmin@stu21.com #配置发件人

    smtp_server 127.0.0.1 #配置邮件服务器

    smtp_connect_timeout 30

    router_id LVS_DEVEL

    }

    vrrp_script chk_schedown { #定义vrrp执行脚本

    script "[ -e /etc/keepalived/down ] && exit 1 || exit 0" #查看是否有down文件,有就进入维护模式

    interval 1 #监控间隔时间

    weight -5 #降低优先级

    fall 2 #失败次数

    rise 1 #成功数次

    }

        vrrp_script chk_nginx {

            script "killall -0 nginx"

            interval 1

            weight -5

            fall 2

            rise 1

    }

     

    vrrp_instance VI_1 {

    state MASTER #配置模式

    #state BACKUP #测试配置模式

    interface eth0

    virtual_router_id 51

    priority 100 #配置优先级

    advert_int 1

    authentication {

    auth_type PASS

    auth_pass 1111

    }

    virtual_ipaddress {

    172.16.21.100 #配置虚拟IP地址

    }

    track_script { #执行脚本

    chk_schedown

        chk_nginx #执行chk_nginx脚本

    }

    #增加以下三行

    notify_master "/etc/keepalived/notify.sh -n master -a 172.16.21.100"

    notify_backup "/etc/keepalived/notify.sh -n backup -a 172.16.21.100"

    notify_fault "/etc/keepalived/notify.sh -n fault -a 172.16.21.100"

    }

     

    vrrp_instance VI_2 {

    state BACKUP #配置模式 #修改为BACKUP

    #state MASTER #测试配置模式

    interface eth0

    virtual_router_id 52

     

    priority 99 #配置优先级 #修改优先级

    advert_int 1

    authentication {

    auth_type PASS

    auth_pass 1111

    }

    virtual_ipaddress {

    172.16.21.101 #配置虚拟IP地址

    }

    track_script {

    chk_schedown

    chk_nginx #执行chk_nginx脚本

    }

    #增加以下三行

    notify_master "/etc/keepalived/notify.sh -n master -a 172.16.21.101"

    notify_backup "/etc/keepalived/notify.sh -n backup -a 172.16.21.101"

    notify_fault "/etc/keepalived/notify.sh -n fault -a 172.16.21.101"

    }

     

     

    #virtual_server 172.16.21.100 80 {

    # delay_loop 6

    # lb_algo rr

    # lb_kind DR

    # nat_mask 255.255.255.0

    # #persistence_timeout 50

    # protocol TCP

    #

    # real_server 172.16.21.15 80 { #配置realaserver

    # weight 1

    # HTTP_GET {#监控配置

    # url {

    # path /

    # #digest ff20ad2481f97b1754ef3e12ecd3a9cc

    #     status_code 200

    # }

    #

    # connect_timeout 3

    # nb_get_retry 3

    # delay_before_retry 1

    # }

    # }

    # real_server 172.16.21.16 80 { #配置realaserver

    # weight 1

    # HTTP_GET {#监控配置

    # url {

    # path /

    # #digest ff20ad2481f97b1754ef3e12ecd3a9cc

    # status_code 200

    # }

    #

    # connect_timeout 3

    # nb_get_retry 3

    # delay_before_retry 1

    # }

    # }

    # sorry_server 127.0.0.1 80 #增加一行sorry_server

    #}

    #

    #

    #virtual_server 172.16.21.101 80 {

    # delay_loop 6

    # lb_algo rr

    # lb_kind DR

    # nat_mask 255.255.255.0

    # #persistence_timeout 50

    # protocol TCP

    #

    # real_server 172.16.21.15 80 { #配置realaserver

    # weight 1

    # HTTP_GET {#监控配置

    # url {

    # path /

    # #digest ff20ad2481f97b1754ef3e12ecd3a9cc

    # status_code 200

    # }

    #

    # connect_timeout 3

    # nb_get_retry 3

    # delay_before_retry 1

    # }

    # }

    # real_server 172.16.21.16 80 { #配置realaserver

    # weight 1

    # HTTP_GET {#监控配置

    # url {

    # path /

    # #digest ff20ad2481f97b1754ef3e12ecd3a9cc

    # status_code 200

    # }

    #

    # connect_timeout 3

    # nb_get_retry 3

    # delay_before_retry 1

    # }

    # }

    # sorry_server 127.0.0.1 80 #增加一行sorry_server

    #}

    #

     

    #virtual_server#10.10.10.2 1358 {

    # delay_loop 6

    # lb_algo rr

    # lb_kind NAT

    # persistence_timeout 50

    # protocol TCP

     

    # sorry_server 192.168.200.200 1358

     

    # real_server 192.168.200.2 1358 {

    # weight 1

    # HTTP_GET {

    # url {

    # path /testurl/test.jsp

    # digest 640205b7b0fc66c1ea91c463fac6334d

    # }

    # url {

    # path /testurl2/test.jsp

    # digest 640205b7b0fc66c1ea91c463fac6334d

    # }

    # url {

    # path /testurl3/test.jsp

    # digest 640205b7b0fc66c1ea91c463fac6334d

    # }

    # connect_timeout 3

    # nb_get_retry 3

    # delay_before_retry 3

    # }

    # }

     

    # real_server 192.168.200.3 1358 {

    # weight 1

    # HTTP_GET {

    # url {

    # path /testurl/test.jsp

    # digest 640205b7b0fc66c1ea91c463fac6334c

    # }

    # url {

    # path /testurl2/test.jsp

    # digest 640205b7b0fc66c1ea91c463fac6334c

    # }

    # connect_timeout 3

    # nb_get_retry 3

    # delay_before_retry 3

    # }

    # }

    #}

     

    #virtual_server#10.10.10.3 1358 {

    # delay_loop 3

    # lb_algo rr

    # lb_kind NAT

    # nat_mask 255.255.255.0

    # persistence_timeout 50

    # protocol TCP

     

    # real_server 192.168.200.4 1358 {

    # weight 1

    # HTTP_GET {

    # url {

    # path /testurl/test.jsp

    # digest 640205b7b0fc66c1ea91c463fac6334d

    # }

    # url {

    # path /testurl2/test.jsp

    # digest 640205b7b0fc66c1ea91c463fac6334d

    # }

    # url {

    # path /testurl3/test.jsp

    # digest 640205b7b0fc66c1ea91c463fac6334d

    # }

    # connect_timeout 3

    # nb_get_retry 3

    # delay_before_retry 3

    # }

    # }

     

    # real_server 192.168.200.5 1358 {

    # weight 1

    # HTTP_GET {

    # url {

    # path /testurl/test.jsp

    # digest 640205b7b0fc66c1ea91c463fac6334d

    # }

    # url {

    # path /testurl2/test.jsp

    # digest 640205b7b0fc66c1ea91c463fac6334d

    # }

    # url {

    # path /testurl3/test.jsp

    # digest 640205b7b0fc66c1ea91c463fac6334d

    # }

    # connect_timeout 3

    # nb_get_retry 3

    # delay_before_retry 3

    # }

    # }

    #}

     

    node18:同样也是沿用apache+lvs+keepalived的节点node17上keepalived相关配置,稍作修改,着色说明需要加上

     

    [root@node18 keepalived]# cat keepalived.conf

    ! Configuration File for keepalived

     

    global_defs {

    notification_email {

        root@node17.stu21.com

        root@node18.stu21.com #配置管理员邮箱

    }

    notification_email_from kaadmin@stu21.com #配置发件人

    smtp_server 127.0.0.1 #配置邮件服务器

    smtp_connect_timeout 30

    router_id LVS_DEVEL

    }

    vrrp_script chk_schedown {

    script "[ -e /etc/keepalived/down ] && exit 1 || exit 0"

    interval 1

    weight -5

    fall 2

    rise 1

    }

        vrrp_script chk_nginx {

            script "killall -0 nginx"

            interval 1

            weight -5

            fall 2

            rise 1

    }

     

    vrrp_instance VI_1 {

    state BACKUP #配置模式 #修改为BACKUP

    # state MASTER #测试配置模式

    interface eth0

    virtual_router_id 51

    priority 99 #配置优先级 #修改优先级

    advert_int 1

    authentication {

    auth_type PASS

    auth_pass 1111

    }

    virtual_ipaddress {

    172.16.21.100 #配置虚拟IP地址

    }

    track_script {

    chk_schedown

    chk_nginx #执行chk_nginx脚本

    }

    #增加以下三行

    notify_master "/etc/keepalived/notify.sh -n master -a 172.16.21.100"

    notify_backup "/etc/keepalived/notify.sh -n backup -a 172.16.21.100"

    notify_fault "/etc/keepalived/notify.sh -n fault -a 172.16.21.100"

    }

     

    vrrp_instance VI_2 {

    #state BACKUP #配置模式 #修改为BACKUP

    state MASTER #测试配置模式

    interface eth0

    virtual_router_id 52

     

    priority 101 #配置优先级 #修改优先级

    advert_int 1

    authentication {

    auth_type PASS

    auth_pass 1111

    }

    virtual_ipaddress {

    172.16.21.101 #配置虚拟IP地址

    }

    track_script {

    chk_schedown

    chk_nginx #执行chk_nginx脚本

    }

    #增加以下三行

    notify_master "/etc/keepalived/notify.sh -n master -a 172.16.21.101"

    notify_backup "/etc/keepalived/notify.sh -n backup -a 172.16.21.101"

    notify_fault "/etc/keepalived/notify.sh -n fault -a 172.16.21.101"

    }

     

     

    #virtual_server 172.16.21.100 80 {

    # delay_loop 6

    # lb_algo rr

    # lb_kind DR

    # nat_mask 255.255.255.0

    # #persistence_timeout 50

    # protocol TCP

    #

    # real_server 172.16.21.15 80 { #配置realaserver

    # weight 1

    # HTTP_GET {#监控配置

    # url {

    # path /

    # #digest ff20ad2481f97b1754ef3e12ecd3a9cc

    #     status_code 200

    # }

    #

    # connect_timeout 3

    # nb_get_retry 3

    # delay_before_retry 1

    # }

    # }

    # real_server 172.16.21.16 80 { #配置realaserver

    # weight 1

    # HTTP_GET {#监控配置

    # url {

    # path /

    # #digest ff20ad2481f97b1754ef3e12ecd3a9cc

    # status_code 200

    # }

    #

    # connect_timeout 3

    # nb_get_retry 3

    # delay_before_retry 1

    # }

    # }

    # sorry_server 127.0.0.1 80 #增加一行sorry_server

    #}

    #

    #virtual_server 172.16.21.101 80 {

    # delay_loop 6

    # lb_algo rr

    # lb_kind DR

    # nat_mask 255.255.255.0

    # #persistence_timeout 50

    # protocol TCP

    #

    # real_server 172.16.21.15 80 { #配置realaserver

    # weight 1

    # HTTP_GET {#监控配置

    # url {

    # path /

    # #digest ff20ad2481f97b1754ef3e12ecd3a9cc

    # status_code 200

    # }

    #

    # connect_timeout 3

    # nb_get_retry 3

    # delay_before_retry 1

    # }

    # }

    # real_server 172.16.21.16 80 { #配置realaserver

    # weight 1

    # HTTP_GET {#监控配置

    # url {

    # path /

    # #digest ff20ad2481f97b1754ef3e12ecd3a9cc

    # status_code 200

    # }

    #

    # connect_timeout 3

    # nb_get_retry 3

    # delay_before_retry 1

    # }

    # }

    # sorry_server 127.0.0.1 80 #增加一行sorry_server

    #}

    #

     

    #virtual_server#10.10.10.2 1358 {

    # delay_loop 6

    # lb_algo rr

    # lb_kind NAT

    # persistence_timeout 50

    # protocol TCP

     

    # sorry_server 192.168.200.200 1358

     

    # real_server 192.168.200.2 1358 {

    # weight 1

    # HTTP_GET {

    # url {

    # path /testurl/test.jsp

    # digest 640205b7b0fc66c1ea91c463fac6334d

    # }

    # url {

    # path /testurl2/test.jsp

    # digest 640205b7b0fc66c1ea91c463fac6334d

    # }

    # url {

    # path /testurl3/test.jsp

    # digest 640205b7b0fc66c1ea91c463fac6334d

    # }

    # connect_timeout 3

    # nb_get_retry 3

    # delay_before_retry 3

    # }

    # }

     

    # real_server 192.168.200.3 1358 {

    # weight 1

    # HTTP_GET {

    # url {

    # path /testurl/test.jsp

    # digest 640205b7b0fc66c1ea91c463fac6334c

    # }

    # url {

    # path /testurl2/test.jsp

    # digest 640205b7b0fc66c1ea91c463fac6334c

    # }

    # connect_timeout 3

    # nb_get_retry 3

    # delay_before_retry 3

    # }

    # }

    #}

     

    #virtual_server#10.10.10.3 1358 {

    # delay_loop 3

    # lb_algo rr

    # lb_kind NAT

    # nat_mask 255.255.255.0

    # persistence_timeout 50

    # protocol TCP

     

    # real_server 192.168.200.4 1358 {

    # weight 1

    # HTTP_GET {

    # url {

    # path /testurl/test.jsp

    # digest 640205b7b0fc66c1ea91c463fac6334d

    # }

    # url {

    # path /testurl2/test.jsp

    # digest 640205b7b0fc66c1ea91c463fac6334d

    # }

    # url {

    # path /testurl3/test.jsp

    # digest 640205b7b0fc66c1ea91c463fac6334d

    # }

    # connect_timeout 3

    # nb_get_retry 3

    # delay_before_retry 3

    # }

    # }

     

    # real_server 192.168.200.5 1358 {

    # weight 1

    # HTTP_GET {

    # url {

    # path /testurl/test.jsp

    # digest 640205b7b0fc66c1ea91c463fac6334d

    # }

    # url {

    # path /testurl2/test.jsp

    # digest 640205b7b0fc66c1ea91c463fac6334d

    # }

    # url {

    # path /testurl3/test.jsp

    # digest 640205b7b0fc66c1ea91c463fac6334d

    # }

    # connect_timeout 3

    # nb_get_retry 3

    # delay_before_retry 3

    # }

    # }

    #}

     

     

     

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  • 原文地址:https://www.cnblogs.com/na2po2lun/p/4270999.html
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