Nginx Proxy Manager Cluster Setup and Failover Guide

Nginx Proxy Manager Cluster Construction and Failover Guide

With the rapid development of Internet applications, more and more websites and applications require load balancing to share traffic. pressure to achieve high availability and scalability. As a high-performance reverse proxy server, Nginx is increasingly favored by developers. In order to meet the load balancing and failover requirements in a cluster environment, Nginx Proxy Manager cluster construction has become an option that cannot be ignored.

1. Overview of Nginx Proxy Manager Cluster
Nginx Proxy Manager cluster works together through multiple Nginx proxy servers to forward network requests according to certain rules, which improves the load balancing capability of the server and simultaneously achieves Failover functionality. The following will introduce specific cluster setup and failover guidelines.

2. Preparations for cluster construction

1. Install Nginx Proxy Manager
   Install Nginx Proxy Manager on all proxy servers and ensure that the versions are consistent.
2. Prepare the load balancer
   Select a server in the cluster as the load balancer, responsible for distributing requests to other proxy servers. You can use Nginx, HAProxy and other software to implement load balancing functions.

3. Cluster setup steps

1. Configuring the load balancer
   Modify the Nginx configuration file on the load balancer and add the IP address of the proxy server and port information to define forwarding rules. An example is as follows:

   upstream backend {
       server 192.168.1.101:80 weight=1;
       server 192.168.1.102:80 weight=2;
       server 192.168.1.103:80 weight=3;
       ...
   }
   
   server {
       listen 80;
       server_name example.com;
   
       location / {
           proxy_pass http://backend;
       }
   }

   After this configuration, the load balancer will forward the request to the proxy server according to the weight.

2. Configure proxy server
   Modify the Nginx configuration file on each proxy server to ensure that the server can receive requests and process them correctly. An example is as follows:

   server {
       listen 80;
       server_name example.com;
   
       location / {
           ...
       }
   }

   After modification, the proxy server will be able to receive requests forwarded by the load balancer normally.

4. Failover settings

1. Monitoring proxy server status
   Set a health check on the load balancer and periodically poll the status of each proxy server . If it is found that a server cannot respond normally, remove it from the load balancing pool to ensure that requests are not sent to the failed server.
2. Automatic switching configuration
   In the load balancer configuration file, use the ip_hash directive of the upstream module so that requests from the same user are always sent to the same proxy server. In this way, when a proxy server fails, the user's request will not be split to different servers, ensuring that the user's session and status will not be lost.

5. Testing and Maintenance

1. Test the cluster function
   After the establishment is completed, use multiple test machines to perform stress testing to verify the load balancing and faults of the cluster transfer function.
2. Regular maintenance
   Regularly monitor the status of each proxy server to detect and handle faults in a timely manner. Monitoring tools can be used to automatically detect server status and alert.

6. Summary
Nginx Proxy Manager cluster construction can improve the performance and availability of websites and applications. By properly configuring load balancers and proxy servers, and setting failover strategies, a highly available cluster environment can be achieved. It should be noted that when building a cluster, factors such as server hardware resources and network bandwidth must be fully considered to ensure the stability and reliability of the cluster.

I hope this article has provided you with some reference and guidance in setting up and failover the Nginx Proxy Manager cluster. Complete code examples can be obtained in official documents or related authoritative tutorials. I hope you can successfully build and manage your own Nginx Proxy Manager cluster.

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