docker-dojo

1. Run the wordpres docker-compose.
2. Run the docker-dojo app
3. Comment the line number 10 of hello-world.rb and rebuild the docker.
4. Run the rebuild Docker.
5. Push the rebuilt Docker image to the tag :no-redis
6. Run the ruilt Docker Image Localy, now you can see the app hello world.
7. Uncomment the line number 10, push the image to the tag redis.
8. Try to make yourself the docker-compose for the sinatra app with the redis image.

Generate Docker Image

How to Loging in DockerHub trough the CLI

docker login -u username -p password

• Building the image

cd app
docker build -t maneta/sinatra .

• Run the Container Image

docker run --rm -t -p 4567:4567  maneta/sinatra

• Pushing the Docker image to Docker Hub

docker push maneta/sinatra

• Repository: https://hub.docker.com/r/maneta/sinatra/

Useful commands:

All running dockers:

docker ps

All running and stopped dockers:

docker ps -a

Kill a container:

docker kill containerID

Remove a container:

docker rm containerID

List Docker Images:

docker images

Remove Docker image:

docker rmi imageID

Docker Compose

• Start the docker compose:

cd compose
docker-compose up

• Shut Down the Compose

cd compose
docker-compose down

K8´s Deploy (Google Cloud)

• All the configurations files are located on the k8s-conf-files directory

Creating Disk

gcloud compute disks create --size 200GB redis-disk

• Output:

Created [https://www.googleapis.com/compute/v1/projects/ruby-app-1470156911832/zones/europe-west1-b/disks/redis-disk].
NAME        ZONE            SIZE_GB  TYPE         STATUS
redis-disk  europe-west1-b  200      pd-standard  READY

Creating Redis Controller

kubectl create -f redis-controller.yml

• Verify that the Redis Controller is running:

kubectl get pods

• Output:

NAME          READY     STATUS    RESTARTS   AGE
redis-q0ifr   1/1       Running   0          1m

Creating Redis Service

kubectl create -f redis-service.yml

• Verify that the Redis service is running:

kubectl get services

• Output:

NAME         CLUSTER-IP     EXTERNAL-IP   PORT(S)    AGE
kubernetes   10.59.240.1    <none>        443/TCP    2h
redis        10.59.255.11   <none>        6379/TCP   1m

Creating Sinatra Controller

kubectl create -f sinatra-controller.yml

• Verify that the Sinatra Controller is running:

kubectl get pods

• Output:

NAME            READY     STATUS    RESTARTS   AGE
redis-q0ifr     1/1       Running   0          7m
sinatra-e3n4t   1/1       Running   0          1m
sinatra-h59za   1/1       Running   0          1m

Creating Sinatra Service

kubectl create -f sinatra-service.yml

• Verify that the Sinatra service is running:

kubectl get services

• Output:

NAME         CLUSTER-IP     EXTERNAL-IP   PORT(S)    AGE
kubernetes   10.59.240.1    <none>        443/TCP    2h
redis        10.59.255.11   <none>        6379/TCP   1m

• Get Load Balancer Public IP

kubectl describe services frontend | grep "LoadBalancer Ingress"

• Output:

LoadBalancer Ingress:	104.155.27.74

Openshift Deployment

• All the configurations files are located on the k8s-conf-files directory

Creating Persistent Volume Claim

oc create -f pvc.yml

Creating Redis Controller

oc create -f redis-controller.yml

Creating Redis Service

kubectl create -f redis-service.yml