How do I quickly deploy a Node.js project

Ali Cloud Services best Practices

Abstract:

Node.js is a JavaScript runtime environment based on Chrome V8 engine, which is used to build fast and easily extensible web applications. Node.js uses an event-driven, non-blocking I/O model, making it lightweight and…

Typical application scenarios include:

• Real-time applications: live chat, real-time notification push, etc. (socket.io)
• Distributed applications: Use existing data through efficient parallel I/O
• Utility applications: A vast array of tools, from small front-end compression deployments (such as Grunt) to desktop graphical interface applications
• Game applications: The game field has high requirements for real-time and concurrency (such as netease’s Pomelo framework)
• Improve Web rendering capabilities with stable interfaces
• Unified front-end and back-end programming languages: Front-end developers can jump into server-side development very quickly (such as the famous pure Javascript full-stack MEAN architecture)

Next we will introduce how to deploy node.js project in Aliyun ECS.

Deployment process

Before deployment, make the following preparations:

• Purchase an ECS instance
• The image on which the instance is running is CentOS7.2
• The instance can connect to the public network
• Tools for connecting to Linux instances, such as Xshell, are already installed locally

To install Nodejs and deploy the project using cloud server ECS, perform the following steps:

1. Purchase an ECS instance.
2. Deploying the Node.js environment – binary installation.
3. Deploy the Node.js environment – Install multiple versions using NVM.
4. Deploy the test project.

Note: Step 2 and Step 3 should be selected according to actual application scenarios.

steps

Step 1: Create an ECS instance

Select the operating system as the public image CentOS7.2. Log in to the Linux instance as user root.

Step 2: Deploy the Node.js environment — binary installation

The installation package used in this deployment process is a compiled binary file. After decompression, node and NPM are already stored in the bin folder. Manual compilation is not required.

Installation steps:

1. Run the wget command to download the Node.js installation package.

The installation package is a compiled file. After decompression, node and NPM are already stored in the bin folder. You do not need to compile the package again.

Wget HTTP: / / https://nodejs.org/dist/v6.9.5/node-v6.9.5-linux-x64.tar.xzCopy the code

2. Unzip the files.

The tar XVF node - v6.9.5 - Linux - x64. Tar. XzCopy the code

3. Create a soft link to make node and NPM commands globally valid.

Create soft links so that node and NPM commands can be used directly in any directory:

ln -s/ root/node - v6.9.5 - Linux - x64 / bin/node/usr /local/bin/node
ln -s/ root/node - v6.9.5 - Linux - x64 / bin/NPM/usr /local/bin/npm
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4. View the node and NPM versions.

node -v
npm -v
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5. The Node.js environment has been installed.

The software is installed in the /root/node-v6.9.5-linux-x64/ directory by default. To install the software in another directory, such as /opt/node/, perform the following operations:

Mkdir -p /opt/node/ mv /root/node-v6.9.5- Linux -x64/* /opt/node/ rm-f /usr/local/bin/node
rm -f /usr/local/bin/npm
ln -s /opt/node/bin/node /usr/local/bin/node
ln -s /opt/node/bin/npm /usr/local/bin/npm
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Step 3: Deploy the Node.js environment – install multiple versions using NVM

Node Version Manager (NVM) is node. js version management software. Users can switch between different versions of Node.js easily. It is suitable for long-term node developers or users who need to quickly update node versions or switch node versions.

Installation steps:

1, directly use git to clone the source code to the local ~/. NVM directory, and check the latest version.

yum install git
git clone https://github.com/cnpm/nvm.git ~/.nvm && cd ~/.nvm && git checkout `git describe --abbrev=0 --tags`
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2. Activate the NVM.

echo ". ~/.nvm/nvm.sh" >> /etc/profile
source /etc/profile
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3. List all versions of Node.js.

nvm list-remote
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4. Install multiple versions of Node.js.

NVM install v6.9.5 NVM install v7.4.0Copy the code

5. Check the installed Node.js version. The current version is V6.9.5.

[root@iZuf62didsxigy36d6kjtrZ .nvm]# nvm ls- > v6.9.5 v7.4.0Copy the code

6. Switch node.js to V7.4.0.

[root@iZuf62didsxigy36d6kjtrZ .nvm]# nvm use v7.4.0Now using the node v7.4.0Copy the code

See the help documentation for more operations on NVM:

nvm help
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Step 4: Deploy the test project

1, create a new project file example.js.

cd ~
touch example.js
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2. Open the project file example.js using the Vim editor.

yum install vim
vim example.jsCopy the code

Type “I” to enter the editing mode and paste the following contents of the project file into the file. Press Esc to exit the editing mode, enter :wq, and press Enter to save the file and exit.

Contents of project files:

const http = require('http');
const hostname = 'ECS public IP address ';
const port = 3000;
const server = http.createServer((req, res) => {
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}/ `); });Copy the code

Note: Enter the actual ECS public IP address in ‘ECS Public IP Address ‘in the project file. 3000 in the project file is the port number, which can be customized.

3. Run projects.

node ~/example.js
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Note: You can run the project in the background using the command “node ~/example.js &”.

4. Run the command to check whether the project port exists.

netstat -tpln

5. Enter http://IP: port number in the browser to access the project.

At this point our Node.js project is deployed.

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