Deploy to Kubernetes in Google Cloud Challenge Lab.txt

# Task - 1 : Create a Docker image and store the Dockerfile

gcloud auth list

gsutil cat gs://cloud-training/gsp318/marking/setup_marking_v2.sh | bash

gcloud source repos clone valkyrie-app

cd valkyrie-app

cat > Dockerfile <<EOF
FROM golang:1.10
WORKDIR /go/src/app
COPY source .
RUN go install -v
ENTRYPOINT ["app","-single=true","-port=8080"]
EOF

docker build -t <Docker Image>:<Tag Name> .

cd ..

cd marking

./step1_v2.sh

# Task - 2 : Test the created Docker image

cd ..
cd valkyrie-app
docker run -p 8080:8080 <Docker Image>:<Tag Name> &
cd ..
cd marking
./step2_v2.sh

# Task - 3 : Push the Docker image in the Google Container Repository
cd ..
cd valkyrie-app
docker tag <Docker Image>:<Tag Name> gcr.io/$GOOGLE_CLOUD_PROJECT/<Docker Image>:<Tag Name>
docker push gcr.io/$GOOGLE_CLOUD_PROJECT/<Docker Image>:<Tag Name>

# Task - 4 : Create and expose a deployment in Kubernetes
sed -i s#IMAGE_HERE#gcr.io/$GOOGLE_CLOUD_PROJECT/<Docker Image>:<Tag Name>#g k8s/deployment.yaml
gcloud container clusters get-credentials valkyrie-dev --zone us-east1-d
kubectl create -f k8s/deployment.yaml
kubectl create -f k8s/service.yaml

# Task - 5 : Update the deployment with a new version of valkyrie-app
git merge origin/kurt-dev
kubectl edit deployment valkyrie-dev

### change replicas from 1 to <Replicas Count>
### change <Tag Name> to <Updated Version> in two places

docker build -t gcr.io/$GOOGLE_CLOUD_PROJECT/<Docker Image>:<Updated Version> .
docker push gcr.io/$GOOGLE_CLOUD_PROJECT/<Docker Image>:<Updated Version>

# Task - 6 : Create a pipeline in Jenkins to deploy your app

docker ps
docker kill <take container_id from above command>

export POD_NAME=$(kubectl get pods --namespace default -l "app.kubernetes.io/component=jenkins-master" -l "app.kubernetes.io/instance=cd" -o jsonpath="{.items[0].metadata.name}")
kubectl port-forward $POD_NAME 8080:8080 >> /dev/null &
printf $(kubectl get secret cd-jenkins -o jsonpath="{.data.jenkins-admin-password}" | base64 --decode);echo

--> Open Jenkins Web View -> Preview on port 8080
   Username : admin
   Password : {Code output from previous command} 


Go through the following:

-> Manage Jenkins -> Manage Credentials -> Jenkins -> Global credentials (unrestricted) -> Add credentials -> Kind: Google Service Account from metadata -> OK

-> Jenkins -> New Item -> Name : valkyrie-app -> Pipeline -> Pipeline script from SCM -> Set SCM to git -> OK

-> Pipeline -> Script: Pipeline script from SCM -> SCM: Git

-> Repository URL: {find it using command: gcloud source repos list} -> Credentials: {Project id}

-> Apply -> Save

sed -i "s/green/orange/g" source/html.go

sed -i "s/YOUR_PROJECT/$GOOGLE_CLOUD_PROJECT/g" Jenkinsfile
git config --global user.email "you@example.com"              // Email
git config --global user.name "student..."                       // Username
git add .
git commit -m "built pipeline init"
git push

In Jenkins click Build and wait to get score.

Congratulations, you're all done with the lab 😄