pubsub ruby poc

To showcase how to connect up third party software using a gateway function which accepts a call, formats it, adds a message to a topic which then is subscribed to and handled by a different component. Allowing highly composable components.

set up pub/sub

First up, enable pubsub on your gcp project.

The topics and subscriptions will be created using the google deployments in deployment/base.yaml.

Once this is done you also need to get the service account json and store it in this local folder as service-account.json. These secrets would normally be injected using KMS or similar secret stores but it's outside the scope of what I'm trying to do here so.

cloud deployment

Run the deployment (or preview by adding --preview at the end).

gcloud deployment-manager deployments create article-pubsub-poc --config deployment/base.yaml

or to update if it is already created:

gcloud deployment-manager deployments update article-pubsub-poc --config deployment/base.yaml

Templates to use can be found here.

skaffold

To deploy the app using helm + skaffold:

export GCP_PROJECT=david-266106
./set-context.sh ${GCP_PROJECT}
skaffold run --default-repo gcr.io/${GCP_PROJECT}

testing it

You should now be able to see both pods running under:

kubectl get pods
stern -l app=pubsub-poc

Then you can try putting something on the topic:

curl <your-public-ip>/test

cleaning up

After playing with this, it's advisable to clean up, simply remove the entire deployment: