Nginx Proxy Manager routing strategy detailed explanation and selection guide

Nginx Proxy Manager routing strategy detailed explanation and selection guide

Introduction:
Nginx is a high-performance reverse proxy server that is often used to build powerful Web application. The Nginx Proxy Manager is a powerful Nginx management panel that can help us configure and manage proxy routing on Nginx. This article will introduce in detail the routing strategy of Nginx Proxy Manager and how to choose the appropriate strategy. We'll also provide some code examples to demonstrate these strategies in action.

1. Nginx Proxy Manager routing strategy

1. Polling strategy
   Polling strategy is one of the most common routing strategies. It forwards requests to back-end servers in order of servers to achieve balanced distribution of requests. Here is an example Nginx configuration using a polling policy:

upstream backend {
    server 192.168.1.101:8080;
    server 192.168.1.102:8080;
    server 192.168.1.103:8080;
}

server {
    listen 80;
    server_name example.com;

    location / {
        proxy_pass http://backend;
    }
}

2. IP Hash Policy
   The IP hash policy forwards requests to a specific backend server based on the requested IP address . This ensures that requests from the same IP are always forwarded to the same server, which is suitable for applications that need to maintain session status. The following is an example Nginx configuration using the IP hash policy:

upstream backend {
    ip_hash;
    server 192.168.1.101:8080;
    server 192.168.1.102:8080;
    server 192.168.1.103:8080;
}

server {
    listen 80;
    server_name example.com;

    location / {
        proxy_pass http://backend;
    }
}

3. Least Connection Policy
   The least connection policy will forward the request to the backend server with the least number of connections, so that While load balancing can be achieved, it can also ensure that the load of each server is balanced as much as possible. The following is an Nginx configuration example using the least connection strategy:

upstream backend {
    least_conn;
    server 192.168.1.101:8080;
    server 192.168.1.102:8080;
    server 192.168.1.103:8080;
}

server {
    listen 80;
    server_name example.com;

    location / {
        proxy_pass http://backend;
    }
}

4. Dynamic weight strategy
   The dynamic weight strategy dynamically adjusts the weight value of the server according to the load of the server. A server with high load will receive fewer requests, while a server with low load will receive more requests. The following is an example of Nginx configuration using dynamic weight strategy:

upstream backend {
    server 192.168.1.101:8080 weight=3;
    server 192.168.1.102:8080 weight=2;
    server 192.168.1.103:8080 weight=1;
}

server {
    listen 80;
    server_name example.com;

    location / {
        proxy_pass http://backend;
    }
}

2. Select the appropriate routing strategy

Choosing the appropriate routing strategy needs to be determined according to the specific needs and application scenarios . Here are some common selection guidelines:

1. If you want to distribute requests evenly to the backend servers, you can choose a polling strategy.
2. If you need to maintain session status, it is recommended to choose an IP hashing strategy to ensure that requests for the same IP are always processed in the same server.
3. If you want to achieve load balancing while trying to balance the load of each server, you can choose the least connection strategy.
4. If you want to dynamically adjust the weight value according to the load of the server, you can choose the dynamic weight strategy.

It should be noted that different routing strategies may have different impacts on server performance. When selecting a routing strategy, it should be evaluated based on the characteristics of the application and the hardware configuration of the server.

Conclusion:

This article introduces the routing strategies of Nginx Proxy Manager in detail and provides some code examples to demonstrate the practical application of these strategies. Choosing an appropriate routing strategy is very important for building high-performance web applications. I hope this article can provide some guidance and help to readers when using Nginx Proxy Manager.

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