Communicate between two containers in Google cloud build

Question

I am running my CI/CD pipeline in Google cloud build. My app has web and wget containers. I am trying to reach web from wget<

Answer 1

From the docs:

Each build step is run with its container attached to a local Docker network named cloudbuild. This allows build steps to communicate with each other and share data.

You can use docker compose and using cloudbuild network, for example:

#docker-compose.yml
app-workspace:
  ...
  network_mode: cloudbuild
db-mysql:
  ...
  network_mode: cloudbuild
...
networks:
  default:
    external:
      name: cloudbuild

Or if you are using docker run, add option --network cloudbuild.

After that, you can communicate to other services you defined in the previous step as you expect. For example:

#steps
- id: 'Ping to other container'
  name: gcr.io/cloud-builders/curl
  args: ["app-workspace:your-service-port"]

Hope this helps.