As a popular back-end development language, Node.js has become increasingly popular in recent years. Node.js uses an event-driven, non-blocking I/O model that provides excellent performance when handling large numbers of concurrent requests. Therefore, it has become the choice of many Internet companies.
In practical applications, deploying Node.js applications to production environments is an important topic. Deploying a Node.js application involves selecting an appropriate server, configuring the server environment, installing Node.js, and publishing the application. This article will introduce how to deploy Node.js applications on CentOS 7 systems.
Step 1: Select a server
The first step in deploying a Node.js application is to select a server. In CentOS 7 systems, Nginx is a popular web server that can reverse proxy requests to Node.js applications. Therefore, when choosing a server, consider using an Nginx-based system.
In server selection, the hardware configuration and performance of the server also need to be considered. Depending on the application's expected load and traffic, choosing an appropriate server will ensure the stability and reliability of the application. At the same time, the scalability of the server also needs to be considered so that it can be upgraded later according to actual needs.
Step 2: Configure the server environment
After selecting the server, you need to configure the server environment. In CentOS 7 systems, you can install necessary software and tools through the yum command.
First, you need to install Node.js and npm. The command is as follows:
yum install -y nodejs yum install -y npm
Then, you need to install pm2, which is a Node.js process manager that can restart the application when the application crashes, and can also perform load balancing and monitoring operations. The command is as follows:
npm install pm2 -g
Next, you need to install Git. In future application releases, Git can be used for code management and version control. The command is as follows:
yum install -y git
Finally, Nginx needs to be installed. Nginx is a high-performance web server that can reverse proxy requests to Node.js applications. The command is as follows:
yum install -y epel-release yum install -y nginx systemctl start nginx
After the installation is complete, you can test whether Nginx is running normally by accessing the server's IP address.
Step 3: Deploy the application
After configuring the server environment, you need to deploy the Node.js application to the server.
1. Clone the code
Enter the ~/ directory and use Git to clone the application code. The command is as follows:
cd ~ git clone <应用代码仓库地址>
2. Install dependencies
Enter the application directory , use npm to install application dependencies, the command is as follows:
cd <应用目录> npm install
3. Start the application
Use pm2 to start the application, the command is as follows:
pm2 start <应用入口文件>
4. Configure Nginx
Finally, Nginx needs to be configured to reverse proxy the request to the Node.js application.
First, back up the default configuration file of Nginx, the command is as follows:
mv /etc/nginx/nginx.conf /etc/nginx/nginx.conf.bak
Then, create a new Nginx configuration file, the command is as follows:
vi /etc/nginx/nginx.conf
Add the following to the configuration file Content:
http { upstream <应用名称> { server 127.0.0.1:<应用端口>; keepalive 64; } server { listen 80; server_name <应用域名>; location / { proxy_http_version 1.1; proxy_set_header Connection ""; proxy_pass http://<应用名称>; } } }
Among them,
Finally, restart the Nginx service to make the configuration take effect. The command is as follows:
systemctl restart nginx
Now, the Node.js application has been successfully deployed to the server. You can access the application through
Summary
To deploy a Node.js application to a server, you need to select a suitable server, configure the server environment, install Node.js, install pm2, install Git, and configure Nginx. This article gives detailed steps for deploying Node.js applications on CentOS 7 systems. I hope it will be helpful to readers.
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