k8s-hw1

Kubernetes Homework 1

hello-app

hello-app version 1.0 exposes a Rest API with Fastify.

• path /hello returns a HTML page with Hello World! message.
• to build hello-app docker image version 1.0 for Node.js backend application run this command in the project root:

docker build -t hello-app:1.0 -f dockerfiles/hello-app/v1/Dockerfile hello-app/

• to test this image locally run this command:

docker container run --publish 9001:9000 --detach hello-app:1.0

• you can now access it in your browser at this address:

http://localhost:9001/hello

hello-app version 2.0 exposes a Rest API with Fastify.

• path /hello returns a HTML page with Hello Mars! message.
• to build hello-app docker image version 2.0 for Node.js backend application run this command in the project root:

docker build -t hello-app:2.0 -f dockerfiles/hello-app/v2/Dockerfile hello-app/

• to test this image locally run this command:

docker container run --publish 9002:9000 --detach hello-app:2.0

• you can now access it in your browser at this address:

http://localhost:9002/hello

hello-nginx

hello-nginx version 2.0 overrides symbolic links of log files from /var/log/nginx/ in the original image in order to be able to mount a PersistentVolume and keep the log files in a persistent way. Also, it extends /etc/nginx/nginx.conf by overriding default.conf file in order to configure nginx to act as a proxy for the hello-app server.

• to build hello-nginx docker image version 2.0 run this command in the project root:

docker build -t hello-nginx:2.0 -f dockerfiles/hello-nginx/Dockerfile hello-nginx/

docker hub

You can skip the steps described above and find the built images in the docker hub public registry:

• hello-app
• hello-nginx

kubernetes

In order to deploy the replicated Pod running the above images in two Containers on the same Pod and expose the Pods as a Service run this command in the project root:

kubectl apply -f k8s-manifests/hello-service/v1/hello-service.yaml

In order to upgrade the above deployment run this command in the project root:

kubectl apply -f k8s-manifests/hello-service/v2/hello-service.yaml