Backend Development
PHP Tutorial
Dynamic failure detection and load weight adjustment strategy in Nginx load balancing solution
Dynamic failure detection and load weight adjustment strategy in Nginx load balancing solution
Dynamic failure detection and load weight adjustment strategy in Nginx load balancing solution requires specific code examples
Introduction
In a high-concurrency network environment, the load Equalizing is a common solution that can effectively improve the usability and performance of your website. Nginx is an open source, high-performance web server that provides powerful load balancing capabilities. This article will introduce two important features in Nginx load balancing, dynamic failure detection and load weight adjustment strategy, and provide specific code examples.
1. Dynamic failure detection
Dynamic failure detection means that when the backend server fails or is unavailable, Nginx can automatically forward the request to other available servers to provide better service availability. Nginx implements dynamic failure detection by using the healthcheck module.
- Configuring the healthcheck module
First, you need to enable the healthcheck module in the Nginx configuration file. Add the following configuration in the http block:
http {
# 启用http_healthcheck模块
healthcheck {
# 检查间隔为5秒
interval=5s;
# 超时时间为2秒
timeout=2s;
# 失败的最大次数为3次
fails=3;
# 检查的URI路径
uri=/healthcheck;
}
# 其他配置项...
}- Configure upstream and server
Then, configure the list of backend servers in the upstream block. Each server needs to configure the corresponding backup server, that is, the backup server used when the main server is unavailable, as shown below:
upstream backend {
# 主服务器
server backend1.example.com;
# 备用服务器
server backup.backend1.example.com backup;
server backup.backend2.example.com backup;
# 其他服务器...
}- Configure location
Finally, it needs to be in the location block Configure proxy rules and specify the method of dynamic failure detection. The following example uses the "least_conn" load balancing strategy and enables the healthcheck module:
location / {
# 使用least_conn负载均衡策略
proxy_pass http://backend;
# healthcheck模块配置
proxy_next_upstream error timeout invalid_header http_500;
proxy_connect_timeout 2s;
proxy_set_header Host $host;
}2. Load weight adjustment strategy
Load weight adjustment refers to the performance and load of the back-end server. , dynamically adjust the weight of forwarded requests to achieve load balancing.
- Configure load weight
First, configure the load weight of each backend server in the upstream block. Different weight values can be specified based on the performance and load of the server. As shown below:
upstream backend {
# 主服务器，权重为5
server backend1.example.com weight=5;
# 其他服务器...
}- Configure load balancing policy
Then, specify the load balancing policy in the location block. The following example uses the "ip_hash" load balancing policy and enables load weight adjustment:
location / {
# 使用ip_hash负载均衡策略
ip_hash;
# 配置负载权重
upstream backend {
server backend1.example.com weight=5;
server backend2.example.com weight=10;
}
# 配置其他代理设置...
}The above code example illustrates the dynamic failure detection and load weight adjustment strategy in the Nginx load balancing scheme. By using the healthcheck module and load weight configuration, better service availability and load balancing effects can be achieved in high-concurrency network environments. I hope this article will help you understand the Nginx load balancing solution.
The above is the detailed content of Dynamic failure detection and load weight adjustment strategy in Nginx load balancing solution. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1379
52
How to configure nginx in Windows
Apr 14, 2025 pm 12:57 PM
How to configure Nginx in Windows? Install Nginx and create a virtual host configuration. Modify the main configuration file and include the virtual host configuration. Start or reload Nginx. Test the configuration and view the website. Selectively enable SSL and configure SSL certificates. Selectively set the firewall to allow port 80 and 443 traffic.
How to check whether nginx is started?
Apr 14, 2025 pm 12:48 PM
In Linux, use the following command to check whether Nginx is started: systemctl status nginx judges based on the command output: If "Active: active (running)" is displayed, Nginx is started. If "Active: inactive (dead)" is displayed, Nginx is stopped.
How to start nginx in Linux
Apr 14, 2025 pm 12:51 PM
Steps to start Nginx in Linux: Check whether Nginx is installed. Use systemctl start nginx to start the Nginx service. Use systemctl enable nginx to enable automatic startup of Nginx at system startup. Use systemctl status nginx to verify that the startup is successful. Visit http://localhost in a web browser to view the default welcome page.
How to check whether nginx is started
Apr 14, 2025 pm 01:03 PM
How to confirm whether Nginx is started: 1. Use the command line: systemctl status nginx (Linux/Unix), netstat -ano | findstr 80 (Windows); 2. Check whether port 80 is open; 3. Check the Nginx startup message in the system log; 4. Use third-party tools, such as Nagios, Zabbix, and Icinga.
How to start nginx server
Apr 14, 2025 pm 12:27 PM
Starting an Nginx server requires different steps according to different operating systems: Linux/Unix system: Install the Nginx package (for example, using apt-get or yum). Use systemctl to start an Nginx service (for example, sudo systemctl start nginx). Windows system: Download and install Windows binary files. Start Nginx using the nginx.exe executable (for example, nginx.exe -c conf\nginx.conf). No matter which operating system you use, you can access the server IP
How to solve nginx304 error
Apr 14, 2025 pm 12:45 PM
Answer to the question: 304 Not Modified error indicates that the browser has cached the latest resource version of the client request. Solution: 1. Clear the browser cache; 2. Disable the browser cache; 3. Configure Nginx to allow client cache; 4. Check file permissions; 5. Check file hash; 6. Disable CDN or reverse proxy cache; 7. Restart Nginx.
How to solve nginx403 error
Apr 14, 2025 pm 12:54 PM
The server does not have permission to access the requested resource, resulting in a nginx 403 error. Solutions include: Check file permissions. Check the .htaccess configuration. Check nginx configuration. Configure SELinux permissions. Check the firewall rules. Troubleshoot other causes such as browser problems, server failures, or other possible errors.
How to solve the problem of nginx cross-domain
Apr 14, 2025 am 10:15 AM
There are two ways to solve the Nginx cross-domain problem: modify the cross-domain response header: add directives to allow cross-domain requests, specify allowed methods and headers, and set cache time. Use CORS modules: Enable modules and configure CORS rules that allow cross-domain requests, methods, headers, and cache times.
