8372. Deploying Text Compare Angular App to Docker
Angular and Docker

Introduce how to deploy angular application to Docker.

1. Angular Project

I will use the angular project ‘Text Compare’ and deploy it to Docker container.

1.1 Download

git clone https://github.com/jojozhuang/text-compare-angular.git
cd text-compare-angular

1.2 Installing Packages

Install package rimraf and cross-env.

npm install rimraf --save
npm install cross-env --save-dev

1.3 Build Command

Create a new build command build:aot:prod in ‘package.json’. We will use AOT mode.

"scripts": {
  ...
 
  "build": "ng build --prod",
  "build:aot:prod": "rimraf dist compiled && cross-env BUILD_AOT=1 SOURCE_MAP=0 ng build --prod",
 
  ...
},

1.4 Nginx

Create nginx custom configuration file named ‘nginx-cutomer.conf’ in folder ‘config’ with the following content.

server {
  listen 80;

  gzip on;
  gzip_http_version 1.1;
  gzip_disable      "MSIE [1-6]\.";
  gzip_min_length   1100;
  gzip_vary         on;
  gzip_proxied      expired no-cache no-store private auth;
  gzip_types        text/plain text/css application/json application/javascript application/x-javascript text/xml application/xml application/xml+rss text/javascript;
  gzip_comp_level   5;

  root /usr/share/nginx/html;

  location / {
    index index.html index.htm;
    try_files $uri $uri/ /index.html =404;
  }
}

2. Docker

2.1 Docker File

Create a file named ‘Dockerfile’.

# Usage:
#
#    Build image:
#    docker build -t text-compare .
#
#    Run image (on localhost:8080):
#    docker run --name text-compare -p 8080:80 text-compare
#
#    Run image as virtual host (read more: https://github.com/jwilder/nginx-proxy):
#    docker run -e VIRTUAL_HOST=text-compare.your-domain.com --name text-compare text-compare
# Stage 1, based on Node.js, to build and compile Angular
 
FROM node:9.4.0-alpine as builder
 
COPY package.json ./
## Storing node modules on a separate layer will prevent unnecessary npm installs at each build
RUN npm i && mkdir /ng-app && mv ./node_modules ./ng-app
 
WORKDIR /ng-app
 
COPY . .
 
RUN npm run build:aot:prod
# Stage 2, based on Nginx, to have only the compiled app, ready for production with Nginx
 
FROM nginx:1.13.12-alpine
 
COPY ./config/nginx-custom.conf /etc/nginx/conf.d/default.conf
## Remove default nginx website
RUN rm -rf /usr/share/nginx/html/*
## From ‘builder’ stage copy over the artifacts in dist folder to default nginx public folder
COPY --from=builder /ng-app/dist /usr/share/nginx/html
 
CMD ["nginx", "-g", "daemon off;"]

The following points need to be noted about the above code.

  • Use the ‘alpine’ version of nodejs and nginx which occupy less disk space.

2.2 Docker Image

Open docker terminal, go to main project folder. Run the following command:

docker build -t text-compare .

It will take two or three minutes to build the image. Nodejs and Nginx have been downloaded to local docker virtual machine. New image ‘text-compare’ has been created successfully. image

  • If you don’t see the image or the new image has no name and tag set, there must be some errors during the build. Check and rebuild the image.

3. Running and Testing

Run the image in container.

docker run --name text-compare -p 8080:80 text-compare &

Open web browser, access http://192.168.99.100:8080. image Click the ‘Text Compare’ menu. image Try to input some texts in the two input boxes and click ‘Find Difference’ button. You should be able to see the difference. image

4. Reference