Deploy nodejs project path under linux

When deploying Node.js projects under Linux, path setting is a very important step. Correctly setting the path can avoid unnecessary trouble, and it also allows us to manage and deploy projects more conveniently.

Generally speaking, the path setting of Node.js project needs to consider the following aspects:

1. Project file path
2. Node.js running environment path
3. Log file path
4. Static resource path
5. Database path

The following explains how to set these paths:

1. Project file path

The folder path where Node.js projects are stored generally has read and write permissions. It is recommended to create a special directory to store project-related files. For example, you can create a folder named "nodejs" in the root directory to store all Node.js project files.

Example:/var/nodejs

2. Node.js running environment path

When deploying a Node.js project on Linux, we need to ensure that The correct version of the Node.js operating environment is installed on the server. Generally speaking, we need to set the Node.js running environment to a global environment variable so that we can use Node.js in the command line terminal.

You can set the Node.js running environment variables by adding the following configuration in the .bashrc (for ubuntu) or .bash_profile file (for CentOS):

export PATH=$PATH:/usr/bin:/usr/local/bin:/usr/local/node/bin

In the above code, /usr/ local/node/bin is the installation path of Node.js. If your Node.js is installed in a different path, please modify the above code.

You can also modify the environment variables through the following demonstration:

vim /etc/profile 

Add the following code at the end of the opened file:

# Add nodejs bin to PATH
export NODE_HOME=/usr/local/node
export PATH=$PATH:$NODE_HOME/bin

3. Log file path

Log files in Node.js projects generally need to be backed up or cleaned regularly. It is recommended to store the log files in a separate directory. You can specify the storage path of the log files by setting LOG_PATH in the environment variable.

Example:/var/log/nodejs/project-log/

You can set environment variables through the following code:

export LOG_PATH=/var/log/nodejs/project-log/

4. Static resource path

Static resources in Node.js projects are generally some CSS, JS, pictures and other files, which need to be called normally in the application. Static resource paths can be set in the project configuration file so that they can be referenced correctly in the application.

Example:

app.use(express.static(path.join(__dirname, 'public')));

In the above code, __dirname represents the directory where the current script is located, and public is the name of the folder where static resources are stored. This way, you can use relative paths to access these static resources when using them.

5. Database path

In the Node.js project, when connecting to the database, you need to specify the IP address and port number of the server, so you need to set a database path.

Example:

const mongoose = require('mongoose');
mongoose.connect('mongodb://localhost:27017/nodeapp');

In the above code, 'localhost' represents the IP address of the database, '27017' represents the port number, and 'nodeapp' represents the name of the database. You need to configure it according to the actual situation.

In summary, it is very important to correctly set the path of the Node.js project. By properly setting the project path, we can make it more convenient to deploy and manage Node.js projects and improve development efficiency.

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