Deploy Open Bank Project on Google Cloud

The following creates a three node cluster on Google Cloud with autoscaling enabled. Warning it enabled preemptible nodes, which mean they could get shutdown at anytime, and always within 24 hours. Why use these? They’re much cheaper, and if architected correctly failure of a node should not impact the system. Remember a borg master is replicated 5 times, and the kubernetes master is abstracted away (and not charged for) on Google’s Kubernetes so it’s always available.

1. Create a cluster of nodes

> The first time you do this, you will hit quota errors, such as max ip addresses per account. You must

request a change to your quota to allow this.

Change ‘projectname’ to your project name.

gcloud beta container \
    --project "<projectname>" \
    clusters create "standard-cluster-1" \
    --zone "europe-north1-a" \
    --username "admin" \
    --cluster-version "1.11.6-gke.2" \
    --machine-type "f1-micro" \
    --image-type "COS" \
    --disk-type "pd-standard" \
    --disk-size "30" \
    --metadata disable-legacy-endpoints=true \
    --scopes "https://www.googleapis.com/auth/devstorage.read_only","https://www.googleapis.com/auth/logging.write","https://www.googleapis.com/auth/monitoring","https://www.googleapis.com/auth/servicecontrol","https://www.googleapis.com/auth/service.management.readonly","https://www.googleapis.com/auth/trace.append" \
    --preemptible \
    --num-nodes "3" \
    --enable-cloud-logging \
    --enable-cloud-monitoring \
    --enable-ip-alias \
    --network "projects/<projectname>/global/networks/default" \
    --subnetwork "projects/projectname/regions/europe-north1/subnetworks/default" \
    --default-max-pods-per-node "110" \
    --enable-autoscaling \
    --min-nodes "3" \
    --max-nodes "10" \
    --addons HorizontalPodAutoscaling,HttpLoadBalancing,KubernetesDashboard \
    --enable-autoupgrade \
    --enable-autorepair \
    --enable-autoprovisioning \
    --min-cpu 1 --max-cpu 1 \
    --min-memory 1 --max-memory 1 \

2. Connect to your cluser

From your terminal, connect to your cluser. You can also do this through the Google ‘web console’ interface if you prefer.

gcloud container clusters get-credentials <cluster-name> --zone europe-north1-a --project <project-name>

3. Deploy OBPAPI to Google Kubernetes

Deploy the obpapi_k8s.yaml to your cluster. Kubernetes will read this and deploy the objects within the document.

kubectl apply -f obpapi_k8s.yaml

Useful commands to see progress:

kubectl get pods
kubectl logs -f <pod-name>

4. Patching the reclaim policy to Retain

https://kubernetes.io/docs/tasks/administer-cluster/change-pv-reclaim-policy/

kubectl get pv
kubectl patch pv <your-pv-name> -p '{"spec":{"persistentVolumeReclaimPolicy":"Retain"}}'

5. Access the Dashboard

If you like, you can view the pretty dashboard showing the deployment load, progess etc:

kubectl create clusterrolebinding kubernetes-dashboard --clusterrole=cluster-admin --serviceaccount=kube-system:kubernetes-dashboard

kubectl proxy

You can now view the dashboard at: http://localhost:8001/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy/#!/overview?namespace=default