rsirimalla / gcp-hello-world

Play with GCP

What is it?

Hello World web application on GCP platform

Design Considerations

• Simple and scalable
• Stateless
• Standard packaging and deploy
• Simple Monitoring

Implementation details

• "Cloud Run" is used as compute service. Why?

  • Its simple & scalable
  • Standard package and deploy - Docker
  • stateless
  • consurrency request handling
  • Perfect spot between cloud functions and GKE
  • Offers custom domain mapping

• "Cloud Spanner" is used ad database solution. Why?

  • Horizantally scalable
  • Managed platform

• "Cloud Build" is used to build CI/CD platform. Why?

  • Scalable
  • Native integration with Cloud Run, IAM, Monitoring

• "terraform" is used for provisioning. Why?

  • Widely adopted
  • Good community support
  • Reusable modules for almost anything

Code organzation

• provision - folder contains code required to provision infrastructure
• app - folder contains application code
• requirements.txt - Python dependencies
• Dockerfile - Package application
• cloudbuild.yaml - Build and Deploy steps to perfom on build machine

How to provision?

• Pre-reqs

  • gcloud cli
  • terraform
  • Docker
  • git

• Steps to provision

  • Clone repository
  • Update project in provision/terraform.tfvars
  • provision

  git checkout [e-mail]:rsirimalla/gcp-hello-world.git
  cd gcp-hello-world/provision
  terraform init
  terraform plan
  terraform apply
  

• Make a note of output urls for cloud repo and cloud run service

How to setup CI/CD pipeline?

• Add GIT remote and push

$ git config --global credential.'https://source.developers.google.com'.helper gcloud.sh
$ git remote add google <cloud repo URL from terraform output>
$ git push google master

How to view application

• Open the below URL from browser

$ terraform output service_url

Clean up

terraform destroy 

Monitoring

• Setup "Uptime Checks"
  • Ping health check every 1min
  • Make sure the health endpoint access all layers of stack (ex:- retreive from DB)
  • Create alerts
  • Proactive measure
• Dashboards
  • Monitroing keeps getting simple as you go from "you manage"(VMs) => "Managed" => "Serverless"
  • "Cloud Run" default dashboard should help you with most the metrics you looking for
• Alerts
  • Set up alerts based on the pattern in logs like ERROR or EXCEPTION etc
  • Reactive measure

Custom domain

• Coudn't perform domain mapping in a automated fashion since it required manual verification

Enhancements

• Authentication
• Application firewall

References

https://robmorgan.id.au/posts/deploy-a-serverless-cicd-pipeline-on-gcp-using-cloud-run-and-terraform/
https://cloud.google.com/blog/topics/developers-practitioners/provisioning-cloud-spanner-using-terraform
https://github.com/vinycoolguy2015/awslambda/tree/master/gcp_cloudrun_apigateway
https://github.com/GoogleCloudPlatform/community/tree/master/tutorials/serverless-grafana-with-iap
https://threedots.tech/post/complete-setup-of-serverless-application/