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Dockerize Angular app and deploy on OpenShift

vitorstick profile image Vitor Ferreira ・3 min read

I've been experimenting with several tools and would like to share my latest experience:
Deploy an Angular application created with SSR inside a Nwrl Nx workspace, and then dockerize it and deploy on RedHat OpenShift.

Why use Angular with SSR?
I wanted to try to have a 100% lighthouse audit application, and despite my Angular experience, never worked on an angular project using server side rendering, so, building a personal website, was a good opportunity to experiment and have that 100% on performance.

Why chose RedHat OpenShift?
Simple, I like the red hat that the girls that promote the service use, and I have used AWS and Azure solutions. Also very important, they have a free option.

First Step (assuming the application already exist), creating the Dockerfile

### STAGE 1: Build ###
FROM node:lts-alpine AS build

#### make the 'app' folder the current working directory
WORKDIR /usr/src/app

#### copy both 'package.json' and 'package-lock.json' (if available)
COPY package*.json ./

#### install angular cli
RUN npm install -g @angular/cli

#### install project dependencies
RUN npm install

#### copy things
COPY . .

#### generate build --prod
RUN npm run build:ssr

### STAGE 2: Run ###
FROM nginxinc/nginx-unprivileged

#### copy nginx conf
COPY ./config/nginx.conf /etc/nginx/conf.d/default.conf

#### copy artifact build from the 'build environment'
COPY --from=build /usr/src/app/dist/vitorspace/browser /usr/share/nginx/html

#### don't know what this is, but seems cool and techy
CMD ["nginx", "-g", "daemon off;"]

Remarks:
Had to use nginxinc/nginx-unprivileged due to problems on OpenShift with nginx permissions (thank you random stranger on stackoverflow that suggested it).

On package.json the script for build:ssr is
"build:ssr": "ng build --prod vitorspace && ng run vitorspace:server:production", remember, this is an angular application with server side rendering.

The nginx.conf configuration (I am trying a lighthouse 100% angular application, so I needed that):

server {
    listen 0.0.0.0:8080;
    listen [::]:8080;
    default_type application/octet-stream;

    gzip                    on;
    gzip_comp_level         6;
    gzip_vary               on;
    gzip_min_length         1000;
    gzip_proxied            any;
    gzip_types              text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;
    gzip_buffers            16 8k;
    gunzip on;
    client_max_body_size    256M;

    root /usr/share/nginx/html;

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

Second Step - sending docker image to dockerhub

You need a dockerhub account

Build the image
docker build -t vitorspace-image .

Run the image to test it
docker run --name vitorspace-container -d -p 8888:80 vitorspace-image

browser it http://localhost:8888/

Commit image
docker commit 21737e7ab73b vitorstick/vitorspace:v1

Tag image
docker tag vitorspace-image vitorstick/vitorspace

Push image
docker push vitorstick/vitorspace

Third Step - publishing it on RedHat OpenShift

Assuming you already have a account

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Create OpenShift Project

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Chose Workload Option and Select Container Image

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Don't forget the docker image path, and then just say what will be your application path

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On the bottom of the same form, on Advanced Options, just pick the Create a route to the application and you will have an url to try and share your application.

Alt text of image

Conclusions

OpenShift have a lot of options, about pods, configurations, and a lot of other things, but honestly I am a developer, not a devops, and spending a lot of time changing yaml files does not bring me any joy, and that's what I really liked in OpenShift, it's super easy to use (after doing it the first time)

The main reason for me to create and share this article, was the pain I felt doing some of this things for the first time, and like me, maybe I can help some of you.

If you have any suggestion about anything, please share.

Posted on May 3 by:

vitorstick profile

Vitor Ferreira

@vitorstick

Software developer @Hovione

Discussion

markdown guide
 

Thank you for your awesome reference. but after tried this process to create docker image I'm getting target does not exist.

An unhandled exception occurred: Project target does not exist
npm ERR! Failed at the xxx@0.0.0 build:ssr script.