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

Configure keepalivedHa Cluster

1) Experimental environment:

Server system: CentOS7.3

Service: nginx,keepalived

Client system: Windows 10centOS7.3

2) initialization operation: Master/Backup, operation of Tong Yan

# install keepalived software

[root@shiyan7 ~] # yum install keepalived

# install Nginx (need to configure EPEL source)

[root@shiyan7 ~] # yum install Nginx

# turn off and clear the firewall

[root@shiyan7 ~] # systemctl disable firewall.d

[root@shiyan7 ~] # systemctl stop firewall.d

[root@shiyan7] # iptables-F

# add host resolution

[root@shiyan7 ~] # vim / etc/hosts

127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4

:: 1 localhost localhost.localdomain localhost6 localhost6.localdomain6

172.18.17.34 shiyan.fore

172.18.17.31 shiyan.one

# disable Selinux (restart after configuration)

[root@shiyan7 ~] # vim / etc/selinux/config

Selinux=disabled

III) Master configuration

Nginx configuration

[root@shiyan7 ~] # mkdir / app/nginx/html

[root@shiyan7 ~] # echo "Sorry Server-1" > / app/nginx/html/index.html

[root@shiyan7 ~] # cp / etc/nginx/nginx.conf {, .bak}

[root@shiyan7 ~] # vim / etc/nginx/nginx.conf

Server {

Listen 80 default_server

Listen [::]: 80 default_server

Server_name _

Root / app/nginx/html

# Loadconfiguration files for the default server block.

Include/etc/nginx/default.d/*.conf

Location / {

}

Error_page404 / 404.html

Location = / 40x.html {

}

Error_page500 502 503 504 / 50x.html

Location = / 50x.html {

}

}

[root@shiyan7 ~] # systemctl start nginx

Test Nginx using a browser

KeepAlived configuration

[root@shiyan7 ~] # cp / etc/keepalived/keepalived.conf {, .bak}

[root@shiyan7 ~] # vim / etc/keepalived/keepalived.conf

Global_defs {

Notification_email {

Acassen@firewall.loc

Failover@firewall.loc

Sysadmin@firewall.loc

}

Notification_email_from Alexandre.Cassen@firewall.loc

Smtp_server192.168.200.1

Smtp_connect_timeout 30

Router_id node1

}

Vrrp_instance Ha_1 {

State BACKUP

Interface ens33

Virtual_router_id 51

Priority 100

Advert_int 1

Authentication {

Auth_type PASS

Auth_pass 1111

}

Virtual_ipaddress {

172.18.17.30/16 dev ens33

}

}

IV) Backup configuration

Nginx configuration

[root@shiyan7 ~] # mkdir / app/nginx/html

[root@shiyan7 ~] # echo "Sorry Server-2" > / app/nginx/html/index.html

[root@shiyan7 ~] # cp / etc/nginx/nginx.conf {, .bak}

[root@shiyan7 ~] # vim / etc/nginx/nginx.conf

Server {

Listen 80 default_server

Listen [::]: 80 default_server

Server_name _

Root / app/nginx/html

# Loadconfiguration files for the default server block.

Include/etc/nginx/default.d/*.conf

Location / {

}

Error_page404 / 404.html

Location = / 40x.html {

}

Error_page500 502 503 504 / 50x.html

Location = / 50x.html {

}

}

[root@shiyan7 ~] # systemctl start nginx

Test Nginx using a browser

KeepAlived configuration

[root@shiyan7 ~] # cp / etc/keepalived/keepalived.conf {, .bak}

[root@shiyan7 ~] # vim / etc/keepalived/keepalived.conf

Global_defs {

Notification_email {

Acassen@firewall.loc

Failover@firewall.loc

Sysadmin@firewall.loc

}

Notification_email_from Alexandre.Cassen@firewall.loc

Smtp_server192.168.200.1

Smtp_connect_timeout 30

Router_id node2

}

Vrrp_instance Ha_1 {

State BACKUP

Interface ens33

Virtual_router_id 51

Priority 99

Advert_int 1

Authentication {

Auth_type PASS

Auth_pass 1111

}

Virtual_ipaddress {

172.18.17.30/16 dev ens33

}

}

V) testing:

1) start the keepalived service of the master server and view the VIP/IP

Master

[root@shiyan7 ~] # systemctl start keepalived

[root@shiyan7 ~] # ip a l

Backup

[root@shiyan7 ~] # systemctl start keepalived

[root@shiyan7 ~] # ip a l

Test Nginx on the Master environment

2) close Master to test Backup

Master

[root@shiyan7 ~] # systemctl stop keepalived

[root@shiyan7 ~] # ip a l

Backup

[root@shiyan7 ~] # ip a l

Test Nginx on the Backup environment

3) enable Master

Master

[root@shiyan7 ~] # systemctl start keepalived

Root@shiyan7 ~] # ip a l

Backup

[root@shiyan7 ~] # ip a l

Test Nginx on the Master environment

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