Nginx load Balancing in CentOS

Nginx powerful Web server, or reverse proxy server, and Nginx can also follow the schedule rules to achieve dynamic, static page separation, you can follow the polling, IP hash, url hash, weight and other ways to load balance the back-end server, but also support the health check of the backend server.

Nginx's upstream supports 5 load balancing methods:

1), polling (default)

Each request is assigned to a different back-end server in chronological order, and can be automatically rejected if the backend server is down.

2), Weight

Specifies the polling probability, proportional to the weight and access ratios, for situations where the performance of the backend server is uneven.

3), Ip_hash

Each request is allocated according to the hash result of the access IP, so that each visitor has fixed access to a back-end server that resolves the session issue.

4), Fair (third party)

The response time of the back-end server is allocated to the request, and the response time is short of priority allocation.

5), Url_hash (third party)

Simulation Scenario:

Two Web services (TOMCAT1 and TOMCAT2) were launched in CentOS

Native ip:192.168.33.195

TOMCAT1 Native: 192.168.33.192 Port: 8080

TOMCAT2 Native: 192.168.33.193 Port: 8080

Then modify the conf configuration file for the Nginx service to achieve the most basic load balancing

Note: Location inside to configure the site name Proxy_pass points to the upstream configuration

Enter Nginx's IP access as follows:

Nginx load Balancing in CentOS