Introduction
This article describes how to deploy Node.js on a CVM and create a sample project.
Software
Setting up Node.js involves:
CentOS: a distribution of the Linux operating system. We use CentOS 7.9 in this article.
Node.js: a JavaScript runtime environment. We use Node.js 16.10.0 and Node.js 13.10.0 in this article.
npm: a package manager for JavaScript. We use npm 13.10.0 in this article to manage multiple Node.js versions.
Prerequisites
Directions
Step 1: Logging in to a Linux instance
Step 2: Installing Node.js
1. Run the following command to download the Node.js 64-bit install package for Linux.
wget https://nodejs.org/dist/v16.10.0/node-v16.10.0-linux-x64.tar.xz
2. Run the following command to decompress the install package.
tar -xf node-v16.10.0-linux-x64.tar.xz
3. Run the following commands to create symbolic links.
ln -s /root/node-v10.16.3-linux-x64/bin/node /usr/local/bin/node
ln -s /root/node-v16.10.0-linux-x64/bin/npm /usr/local/bin/npm
Once created, you are able to use node and npm commands in any CVM directory.
4. Run the following commands to view Node.js and npm versions.
Step 3: Installing multiple Node.js versions (optional)
Note:
This process allows you to install multiple Node.js versions. Developers can use this to quickly switch among versions.
1. Run the following command to install git.
2. Run the following command to download the NVM source code and check for the newest version.
git clone https://github.com/cnpm/nvm.git ~/.nvm && cd ~/.nvm && git checkout `git describe --abbrev=0 --tags`
3. Run the following to configure NVM environment variables.
echo ". ~/.nvm/nvm.sh" >> /etc/profile
4. Run the following command to read system environment variables.
5. Run the following commands to view all Node.js versions.
6. Run the following commands to install multiple Node.js versions.
7. Run the following command to view all installed Node.js versions.
If the following appears, then the installation is successful and the current version in use isNode.js 16.10.0.
8. Run the following command switch to another version.
Step 4: Creating a sample project
1. Run the following commands to create a file named index.js
under the root path.
2. Press i to enter edit mode and input the following in the index.js
file:
const http = require('http');
const hostname = '0.0.0.0';
const port = 7500;
const server = http.createServer((req, res) => {
if (res.statusCode === 200) {
res.setHeader('Content-Type', 'text/plain');
res.end('Hello World\\n');
});
server.listen(port, hostname, () => {
console.log(`Server running at http://${hostname}:${port}/`);
});
Note:
This article uses port 7500 in the index.js
file. You can use other ports as needed.
3. Press Esc and input :wq to save the file and go back.
4. Run the following command to execute the Node.js project we just created.
5. Open a browser window on your local machine and visit the following URL to check if the project has been executed successfully.
http://CVM_Public_IP:Port
If the following appears, Node.js is installed successfully.
FAQ
If you encounter a problem when using CVM, refer to the following documents for troubleshooting based on your actual situation.
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