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This article mainly explains how Docker deploys Node.js. Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let Xiaobian take you to learn "Docker how to deploy Node.js"!

project structure

`-- docker-node |-- data |-- server |-- app.js |-- dockerfile |-- process.yml |-- package.json |-- docker-compose.yml

1. Create node.js program

app.js

const express = require('express');const app = express();app.get('/', (req, res) => res.send('hello world! '));app.listen(3008);

2. Create a dockerfile

from node:8.9-alpinerun mkdir -p /usr/src/appworkdir /usr/src/apprun npm set registry https://registry.npm.taobao.org/run npm install cmd ["./ node_modules/pm2/bin/pm2-docker", "process.yml"]

From dockerfile we can see that we run node applications through pm2-docker, using pm2 we can monitor file changes to achieve application restart, log storage and other effects; here we need a process.yml configuration file, related usage can be viewed in pm2 documentation.

process.yml

apps: - script : 'app.js' name : 'dokcer-node' exec_mode: 'fork' watch : true instances: 1 log_date_format : 'yyyy-mm-dd hh:mm z' ignore_watch: ['node_modules']

Create docker-compose.yml

In production environments, we often use more than one container. We can manage multiple docker containers through a configuration file, and then use docker-compose to start, stop, and restart the application.

docker-compose.yml

version: "3.0"services: server_node: container_name: server-node build: context: ./ server volumes: - ./ server:/usr/src/app ports: - "3008:3008" environment: - tz=asia/shanghai portainer: image: portainer/portainer:1.11.4 container_name: portainer expose: - "9000" ports: - "9000:9000" volumes: - /var/run/docker.sock:/var/run/docker.sock - ./ data/portainer:/data environment: - tz=asia/shanghai

4. Start the container

After the above files are created, we execute the following command to create our image and start the container

$ docker-compose -f docker-compose.yml up -d

5. Testing

1. Access local port 3008

2, test when the code changes, node automatic restart function, we put "hello world!" "read"restart!!! ", refresh page again

3. Use portainer to manage containers; Compared with the command line, the visual interface can easily and quickly view container logs, container configuration, status, and restart and delete operations; we can access the local port 9000 (configured in docker-compese.yml), and the results are as follows.

At this point, I believe that everyone has a deeper understanding of "Docker how to deploy Node.js", so let's actually operate it! Here is the website, more related content can enter the relevant channels for inquiry, pay attention to us, continue to learn!

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