Nginx + keepalived for a highly reliable web site

Group Network Diagram:

Configuration information:

/usr/local/nginx/conf/nginx.conf on the left NIGX server

#user nobody;

Worker_processes 1;

#error_log Logs/error.log;

#error_log Logs/error.log Notice;

#error_log Logs/error.log Info;

#pid Logs/nginx.pid;

Events {

Worker_connections 1024;

}

HTTP {

Include Mime.types;

Default_type Application/octet-stream;

#log_format Main ' $remote _addr-$remote _user [$time _local] "$request" '

# ' $status $body _bytes_sent ' $http _referer '

# ' "$http _user_agent" "$http _x_forwarded_for" ';

#access_log Logs/access.log Main;

Sendfile on;

#tcp_nopush on;

#keepalive_timeout 0;

Keepalive_timeout 65;

#gzip on;

server {

Listen 80;

server_name 192.168.248.200;

#charset Koi8-r;

#access_log Logs/host.access.log Main;

Location/{

root HTML;

Index index.html index.htm;

}

#error_page 404/404.html;

# REDIRECT Server error pages to the static page/50x.html

#

Error_page 502 503 504/50x.html;

Location =/50x.html {

root HTML;

}

# Proxy The PHP scripts to Apache listening on 127.0.0.1:80

#

#location ~ \.php$ {

# Proxy_pass http://127.0.0.1;

#}

# Pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000

#

#location ~ \.php$ {

# root HTML;

# Fastcgi_pass 127.0.0.1:9000;

# Fastcgi_index index.php;

# Fastcgi_param Script_filename/scripts$fastcgi_script_name;

# include Fastcgi_params;

#}

# Deny access to. htaccess files, if Apache ' s document Root

# concurs with Nginx ' s one

#

#location ~/\.ht {

# Deny All;

#}

}

# Another virtual host using mix of ip-, name-, and port-based configuration

#

#server {

# Listen 8000;

# Listen somename:8080;

# server_name somename alias Another.alias;

# location/{

# root HTML;

# index index.html index.htm;

#    }

#}

# HTTPS Server

#

#server {

# Listen 443 SSL;

# server_name localhost;

# ssl_certificate Cert.pem;

# Ssl_certificate_key Cert.key;

# Ssl_session_cache shared:ssl:1m;

# ssl_session_timeout 5m;

# ssl_ciphers high:!anull:! MD5;

# ssl_prefer_server_ciphers on;

# location/{

# root HTML;

# index index.html index.htm;

#    }

#}

}

The configuration file for the Nginx server on the right/usr/loca/nginx/conf/nginx.conf the contents as follows:

#user nobody;

Worker_processes 1;

#error_log Logs/error.log;

#error_log Logs/error.log Notice;

#error_log Logs/error.log Info;

#pid Logs/nginx.pid;

Events {

Worker_connections 1024;

}

HTTP {

Include Mime.types;

Default_type Application/octet-stream;

#log_format Main ' $remote _addr-$remote _user [$time _local] "$request" '

# ' $status $body _bytes_sent ' $http _referer '

# ' "$http _user_agent" "$http _x_forwarded_for" ';

#access_log Logs/access.log Main;

Sendfile on;

#tcp_nopush on;

#keepalive_timeout 0;

Keepalive_timeout 65;

#gzip on;

server {

Listen 80;

server_name 192.168.248.200;

#charset Koi8-r;

#access_log Logs/host.access.log Main;

Location/{

root HTML;

Index index.html index.htm;

}

#error_page 404/404.html;

# REDIRECT Server error pages to the static page/50x.html

#

Error_page 502 503 504/50x.html;

Location =/50x.html {

root HTML;

}

# Proxy The PHP scripts to Apache listening on 127.0.0.1:80

#

#location ~ \.php$ {

# Proxy_pass http://127.0.0.1;

#}

# Pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000

#

#location ~ \.php$ {

# root HTML;

# Fastcgi_pass 127.0.0.1:9000;

# Fastcgi_index index.php;

# Fastcgi_param Script_filename/scripts$fastcgi_script_name;

# include Fastcgi_params;

#}

# Deny access to. htaccess files, if Apache ' s document Root

# concurs with Nginx ' s one

#

#location ~/\.ht {

# Deny All;

#}

}

# Another virtual host using mix of ip-, name-, and port-based configuration

#

#server {

# Listen 8000;

# Listen somename:8080;

# server_name somename alias Another.alias;

# location/{

# root HTML;

# index index.html index.htm;

#    }

#}

# HTTPS Server

#

#server {

# Listen 443 SSL;

# server_name localhost;

# ssl_certificate Cert.pem;

# Ssl_certificate_key Cert.key;

# Ssl_session_cache shared:ssl:1m;

# ssl_session_timeout 5m;

# ssl_ciphers high:!anull:! MD5;

# ssl_prefer_server_ciphers on;

# location/{

# root HTML;

# index index.html index.htm;

#    }

#}

}

The default HTML file contents of the left Nginx server are: (/usr/local/nginx/html/index.html)

I am Nginx Master

Right nginx server default HTML file content is: (path above)

I am Nginx-slave

The keepalived configuration file for the left Nginx server is: (/etc/keepalived/keepalived.conf)

Global_defs {

router_id NodeA

}

Vrrp_instance Vi_1 {

State MASTER #设置为主服务器

Interface Ens33 #监测网络接口

virtual_router_id #主, the preparation must be the same

Priority # (master, standby machine take different priorities, host value is large, backup machine value is small, the higher the value of higher priority)

Advert_int 1 #VRRP multicast broadcast cycle seconds

Authentication {

Auth_type PASS #VRRP认证方式, the master must be consistent

Auth_pass 1111 # (password)

}

virtual_ipaddress {

192.168.248.200

}

The contents of the Keepalived configuration file for the right Nginx server are as follows:

Global_defs {

router_id NodeB

}

Vrrp_instance Vi_1 {

State BACKUP #设置为主服务器

Interface Ens33 #监测网络接口

virtual_router_id #主, the preparation must be the same

Priority # (master, standby to take different priorities, host value is large, backup machine value is small, the higher the value of the higher priority)

Advert_int 1 #VRRP multicast broadcast cycle seconds

Authentication {

Auth_type PASS #VRRP认证方式, the master must be consistent

Auth_pass 1111 # (password)

}

virtual_ipaddress {

192.168.248.200

}

Start the Nginx server and configure the firewall

#/usr/local/nginx/sbin/nginx

#firewall-cmd--permanent--add-port=80/tcp

#firewall-cmd--reload

The actual test results are as follows:

Close the left Nginx Ens33 port, causing the nginx to prepare the owner,

Nginx + keepalived for a highly reliable web site