Shulou(Shulou.com)06/02 Report--

一、keepalive实现双主:

1.1实验准备

2台主机地址分别为:172.20.10.9,172.20.10.10,

vip1为172.20.10.10，vip2为172.20.10.11

1.2通知脚本:

[root@node5 /]# vim /etc/keepalived/notify.sh #!/bin/bashcontact='root@localhost'notify() { local mailsubject="$(hostname) to be $1, vip floating" local mailbody="$(date +'%F %T'): vrrp transition, $(hostname) changed to be $1" echo "$mailbody" | mail -s "$mailsubject" $contact}case $1 inmaster) notify master ;;backup) notify backup ;; fault) notify fault ;; *) echo "Usage: $(basename $0) {master|backup|fault}" exit 1 ;;esac

1.3配置node5为vip1地址的主节点，vip2地址的备节点

[root@node5 ~]# vim /etc/keepalived/keepalived.conf! Configuration File for keepalivedglobal_defs { notification_email { root@localhost } notification_email_from keepalived@localhost smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id node5 vrrp_mcast_group4 224.0.100.19}vrrp_instance VI_1 { state MASTER interface ens33 virtual_router_id 51 priority 100 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 172.20.10.10/28 dev ens33 label ens33:0 } notify_master "/etc/keepalived/notify.sh master" notify_backup "/etc/keepalived/notify.sh backup" notify_fault "/etc/keepalived/notify.sh fault"}vrrp_instance VI_2 { state BACKUP interface ens33 virtual_router_id 52 priority 98 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 172.20.10.11/28 dev ens33 label ens33:1 } notify_master "/etc/keepalived/notify.sh master" notify_backup "/etc/keepalived/notify.sh backup" notify_fault "/etc/keepalived/notify.sh fault"}

1.4配置node6为vip1地址的备节点，vip2地址的主节点

[root@node6 ~]# vim /etc/keepalived/keepalived.conf ! Configuration File for keepalivedglobal_defs { notification_email { root@localhost } notification_email_from keepalived@localhost smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id node5 vrrp_mcast_group4 224.0.100.19}vrrp_instance VI_1 { state BACKUP interface ens33 virtual_router_id 51 priority 98 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 172.20.10.10/28 dev ens33 label ens33:0 } notify_master "/etc/keepalived/notify.sh master" notify_backup "/etc/keepalived/notify.sh backup" notify_fault "/etc/keepalived/notify.sh fault"}vrrp_instance VI_2 { state MASTER interface ens33 virtual_router_id 52 priority 100 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 172.20.10.11/28 dev ens33 label ens33:1 } notify_master "/etc/keepalived/notify.sh master" notify_backup "/etc/keepalived/notify.sh backup" notify_fault "/etc/keepalived/notify.sh fault"}

1.5验证:

(1)先开启node6节点的keepalived服务,查看IP地址，状态:

2个VIP地址都在node6节点上：

(2)Turn on the node5 keepalived service again to check the IP address and status:

VIP1 address has floated to node5.

二，Nginx+Keepalived实现站点高可用

2.1实验准备:

2台主机:node5地址为172.20.10.9，node6的节点为172.20.10.8

vip地址为172.20.10.10

2.2nginx配置

(1)node5节点

[root@node5 ~]# yum install nginx -y[root@node5 /]# vim /usr/share/nginx/html/index.html node5 web page[root@node5 ~]# systemctl start nginx

(2)node6节点

[root@node6 /]# yum install -y nginx[root@node6 /]# vim /usr/share/nginx/html/index.html node6 web page[root@node6 ~]# systemctl start nginx

2.3配置node5为vip的主节点，配置检查nginx的监控脚本:

[root@node5 /]# vim /etc/keepalived/keepalived.conf! Configuration File for keepalivedglobal_defs { notification_email { root@localhost } notification_email_from keepalived@localhost smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id node5 vrrp_mcast_group4 224.0.100.19}vrrp_script chk_nginx { script "/usr/bin/killall -0 nginx && exit 0 || exit 1 " interval 1 weight -5 fall 2 rise 1}vrrp_instance VI_1 { state MASTER interface ens33 virtual_router_id 51 priority 100 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 172.20.10.10/28 dev ens33 label ens33:0 } track_script { chk_nginx } track_interface { ens33 } notify_master "/etc/keepalived/notify.sh master" notify_backup "/etc/keepalived/notify.sh backup" notify_fault "/etc/keepalived/notify.sh fault"}[root@node5 keepalived]# systemctl start keepalived

2.4配置node6为vip的备节点，配置检查nginx的监控脚本:

[root@node6 /]# vim /etc/keepalived/keepalived.conf ! Configuration File for keepalivedglobal_defs { notification_email { root@localhost } notification_email_from keepalived@localhost smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id node5 vrrp_mcast_group4 224.0.100.19}vrrp_script chk_nginx { script "/usr/bin/killall -0 nginx && exit 0 || exit 1 " interval 1 weight -5 fall 2 rise 1}vrrp_instance VI_1 { state BACKUP interface ens33 virtual_router_id 51 priority 98 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 172.20.10.10/28 dev ens33 label ens33:0 } track_script { chk_nginx } track_interface { ens33 } notify_master "/etc/keepalived/notify.sh master" notify_backup "/etc/keepalived/notify.sh backup" notify_fault "/etc/keepalived/notify.sh fault"}[root@node6 html]# systemctl start keepalived

3.验证：

3.1当服务都正常时，vip地址在node5节点上,测试访问172.20.10.10的情况:

3.2当down掉node5节点上nginx服务时，观察vip地址和其访问情况:

vip地址飘到node6节点上，curl172.20.10.10，则访问的时node6节点

3.3当恢复node5节点上nginx服务时，vip地址飘到node5节点上，访问172.20.10.10则是node5上nginx

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