How To Config Nginx Upstream On Centos 7
What is Nginx?
Nginx is an open source, high performance web server and reverse proxy developed by Igor Sysoev in 2004. It is used to route incoming requests to the appropriate web service. Unlike Apache, nginx is lightweight and built to handle lower-level requests before routing them to Apache or other upstream servers. Nginx is also designed to optimize web server performance and is the preferred server software for low traffic websites.
Nginx is the most popular web server in the world and is used by some of the largest websites such as Facebook, Twitter, Netflix. It is well known for its speed, stability, efficiency and flexibility. It can be used for both static and dynamic web content serving.
What is an Upstream in Nginx?
An upstream in Nginx is an external server or application that is used to process requests. Nginx sends requests to the upstream server or application and forwards the response back to the client. Upstreams are configured in the nginx configuration file and can be used to route traffic to multiple application servers or to load balance traffic.
Upstreams can also be used to route requests to different application servers based on the request or to divide traffic between multiple servers. If the request is of a certain type, such as a static file request, then nginx can route the request to one application server and if the request is of another type, such as a dynamic request, then nginx can route the request to another application server that is better suited for that type of request.
How To Config Nginx Upstream On Centos 7
This article will guide you on how to configure the Nginx upstream on the Centos 7 operating system. Before we start, you should make sure that you have the latest version of Nginx installed. You can check the version of Nginx you are using by running the command “nginx -v”.
If you do not have the latest version of Nginx as of this writing (1.14.x) then you can update it by running the following command: “yum -y update nginx”. This will update Nginx and all of its dependencies on your system.
Step 1: Edit The Configuration File
Once you have the latest version of Nginx installed, you will need to edit the configuration file to configure the upstream. The configuration file is usually located in “/etc/nginx/nginx.conf”. In this configuration file, you will need to add the upstream directive.
Firs, locate the server block for your site in the configuration file. Once you have located the server block for your site, add the upstream directive within that block. The syntax for the upstream directive is as follows:
upstream < name > {
server < IP Address of Server >:< port >;
}
You can also add additional server directives for the upstream if you are using more than one upstream server. The syntax for adding a server directive is as follows:
server < IP Address of Server >:< port >;
Step 2: Create the Location Block For Your Upstream
After you have configured the upstream directive, you need to create a location block within the server block for the upstream. The location block is where you will specify what requests will be sent to the upstream. The syntax for the location block is as follows:
location < path > {
proxy_pass http://< name >;
}
The < path > can either be a specific URL or a directory. You can also specify additional parameters within the location block such as proxy_set_header, proxy_buffer_size, etc.
Step 3: Reload The Configuration File
Once you have added the upstream directive and created the location block, you can reload the configuration file. To reload the configuration file, you can run the command “nginx -s reload”. This will reload the configuration file and all of your changes will be applied.
Conclusion
Configuring an Nginx upstream on Centos 7 is a fairly straightforward process. You will need to edit the configuration file and add the upstream directive and then create the location block for the upstream. Once you have done this, you can reload the configuration file and the upstream will be configured.
FAQs
Q. What is Nginx?
A. Nginx is an open source, high performance web server and reverse proxy developed by Igor Sysoev in 2004.
Q. What are Upstreams in Nginx?
A. An upstream in Nginx is an external server or application that is used to process requests.
Q. How do I configure an upstream in Nginx?
A. You will need to edit the configuration file and add the upstream directive and then create the location block for the upstream. Once you have done this, you can reload the configuration file and the upstream will be configured.
Thank you for reading this article. Please read other articles for more insights.
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