3 tiers application with Cloud Run + load balancers

[SilverMx]

Hi,

I'm building a terraform app with 3 tiers,

• Frontend with a vue.js app
• Backend is a spring boot app
• Db a Cloud SQL

I have an external load balancer for the front end, it works fine. I added an internal load balancer for the backend, which allows me to create other Cloud run apps in a different zone and add it to the backend service. However but Im not able to access the Frontend app pointing to the internal load balancer, I have added a Direct VPC egress and routed all the traffic to the VPC, the configuration uses the same subnet(Private Google Access (PGA) enabled) as the internal load balancer, but it doesn't work. I created an instance in the same subnet and I was able to call the backend and get a response, but when I call the internal load balancer from the frontend Cloud run doesn't work. Use the following doc:

• External load balancer with cloud run: https://cloud.google.com/load-balancing/docs/https/ext-http-lb-tf-module-examples#with_a_backend
• Internal load balancer with cloud run: https://cloud.google.com/load-balancing/docs/l7-internal/setting-up-l7-internal-serverless
• Direct VPC egress for cloud run: https://cloud.google.com/run/docs/securing/private-networking#from-gcp-serverless
• This is my terraform git repository: https://github.com/silvermx/generic-webapp-terraform

Thank you for helping 🙂

[VannGuce]

Hi,

I suggest checking this link[1] for the set up of three-tier application deployment for proper execution.

[1]https://medium.com/google-cloud/3-tier-application-deployment-in-google-cloud-d474339bccad

[SilverMx]

Hi @VannGuce,
How are you? ty for the info.

I found the issue,  the Vue app wasn't able to reach the internal load balancer because the call was done from the client side, I had to change to Nuxt to call the rest API from the server side and reach the internal load balancer, then everything was working fine.

I am preparing an article with the learnings.