frankc60/hello-world

Git, Docker, and Kubernetes example

CREATE NODE APP, DOCKERIZE TO TEST. THEN CREATE A KUBE POD WITH APP.

1. create this nodejs app

2. create a "dockerfile", insert contents.

3. put in a .dockerignore file, with: node_modules

4. build the image: sudo docker build . -t frankc60/hello-world

5. check image is created with: sudo docker images

6. run the image in background: sudo docker run -p 8080:3000 -d frankc60/hello-world

   (-p : for example EXPOSE 3000 (from dockerfile), so would use: -p 8080:3000 - to open port 8080 to network, via http://localhost:8080)

7. check app is running in background: sudo docker ps (to get the containerID) sudo docker logs

8. if you need to go into container: sudo docker exec -it /bin/bash

9. access from cmdline: curl http://localhost:8080

--Put into Kubernetes-- 1.create a pod.yaml file

2.create a service.yaml file

kubectl create -f pod.yaml kubectl get pods kubectl create -f service.yaml kubectl get svc

3.Delete the POD:

kubectl delete pod hello-world

4.update deployment.yaml, and create that instead of the pod.yaml.

*To update the docker tag version. make change n the pod.yaml or deployment.yaml file.

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