deploy-using-helm

Deploy a docker image for the app

I will use my docker user (rjrpaz) for tagging and uploading the image to the registry. I encourage you to replace this with your own user if you are trying to replicate these steps.

This image is created using a very simple Dockerfile.

Create a Dockerfile with the following content:

Dockerfile:

 FROM nginx:1.21.1-alpine
 EXPOSE 80/tcp
 RUN echo "Hello World" > /usr/share/nginx/html/index.html

Build the docker image

 docker build -t rjrpaz/tr-webapp:1.0.0 .

Run the container
```
 docker run -p 8080:80 -d rjrpaz/tr-webapp:1.0.0
```
Access to the following url http://localhost:8080. You should see something like this:

Stop the container

 docker stop $(docker ps -a -q  --filter ancestor=rjrpaz/tr-webapp:1.0.0)

Use docker ps to confirm the container is not running anymore.

Before pushing this images to Docker hub, we have to login first:

 [roberto@vmlab01 ]$ docker login
 Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one.
 Username: rjrpaz
     ...
 Login Succeeded

Now we are allowed to push the image to the registry:

 [roberto@vmlab01 ]$ docker push rjrpaz/tr-webapp:1.0.0
 The push refers to repository [docker.io/rjrpaz/tr-webapp]
 b2bad1512e02: Pushed
 45d993692050: Mounted from library/nginx
 1ea998b95474: Mounted from library/nginx
 95b99a5c3767: Mounted from library/nginx
 fc03e3cb8568: Mounted from library/nginx
 24934e5e6c61: Mounted from library/nginx
 e2eb06d8af82: Mounted from library/nginx
 1.0.0: digest: sha256:8979e04523669748441a58af0ea3547282ad7674133e7bd359b883da2cb4a7d0 size: 1775
 [roberto@vmlab01 ]$

We can also upload the same image using the “latest” tag:

 docker tag rjrpaz/tr-webapp:1.0.0 rjrpaz/tr-webapp:latest

 docker push rjrpaz/tr-webapp:latest