Kubernetes Engine

​Kubernetes Engine is a secured and managed Kubernetes service so you can deploy containerized application in an enterprise/production-grade Kubernetes cluster with a click of a button. 
Getting Started
Clone
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cd $HOME
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git clone https://github.com/saturnism/jvm-helloworld-by-example
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cd jvm-helloworld-by-example/helloworld-springboot-tomcat
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Build
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./mvnw package
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Containerize
Enable API
Enable the Container Registry API so that you can push container images to Container Registry.
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gcloud services enable containerregistry.googleapis.com
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Jib
Use Jib to containerize the application:
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PROJECT_ID=$(gcloud config get-value project)
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​
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./mvnw compile com.google.cloud.tools:jib-maven-plugin:2.4.0:build \
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  -Dimage=gcr.io/${PROJECT_ID}/helloworld
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Learn different ways to containerize a Java application in the Container Image section.
Create Cluster
Enable API
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gcloud services enable compute.googleapis.com
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gcloud services enable container.googleapis.com
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Create Cluster
Create a VPC-native Kubernetes Engine cluster.
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gcloud container clusters create helloworld-cluster \
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  --num-nodes 2 \
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  --enable-ip-alias \
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  --scopes=cloud-platform \
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  --network=default \
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  --machine-type n1-standard-1
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See Compute Engine Machine Types documentation for a list of Machine Types and the associated CPU/Memory resources.
Cluster Credentials
Kubernetes credentials are automatically retrieved and stored in your $HOME/.kube/config file. If you need to re-retrieve the credentials:
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gcloud container clusters get-credentials helloworld-cluster
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Deploy
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PROJECT_ID=$(gcloud config get-value project)
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​
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kubectl create deployment helloworld \
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  --image=gcr.io/${PROJECT_ID}/helloworld
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Check that the container is deployed:
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kubectl get pods
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Expose
You can expose this one service using a single Network (L4) Load Balancer:
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kubectl create service loadbalancer helloworld --tcp=8080:8080
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A Network (L4) Load Balancer is the easiest way to expose a single service for a demo. For production environment, you likely will need to use a HTTP Load Balancer instead.
Connect
Find the Load Balancer's External IP address:
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kubectl get services helloworld
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Initially, it may display that the External IP is <pending>.
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NAME         TYPE           CLUSTER-IP   EXTERNAL-IP   PORT(S)          AGE
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helloworld   LoadBalancer   ...          <pending>     8080:32414/TCP   ...
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Re-check until the External IP is assigned.
Then connect with curl:
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EXTERNAL_IP=$(kubectl get svc helloworld \
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  -ojsonpath='{.status.loadBalancer.ingress[0].ip}')
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​
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curl http://${EXTERNAL_IP}:8080
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Learn More
​Kubernetes from Basic to Advanced code lab​
​Spring Boot on GCP code lab​
​Spring to Kubernetes Faster and Easier​

Cloud Run

Compute Engine

Last modified 1yr ago

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