GKE Cluster Upgrade Notification fails

👓 What did you see?

When we get a UpgradeAvailableEvent, the gcp-pubsub-to-ms-teams cloud function is crashing with an invalid JSON error.

✅ What did you expect to see?

What should happen is a MS Team notification should occur with details of the upgrade.

💻 Where does this happen?

This is happening in gitlab-runner-infrastructure production environment.

🔬 How do I recreate this?

This can be recreated by doing the following in gitlab-runner-infrastructure:

1. Publish the following message to topic `pubsub2teams-xxxxxx'
   • Click "PUBLISH MESSAGE" button in the GCP console
   • Message body=New node version "1.17.15-gke.800" is available for upgrade in the REGULAR channel.
   • Then add the following 5 attributes using the "ADD AN ATTRIBUTE" button
   • project_id=777998843057
   • cluster_location=europe-west2
   • cluster_name=cluster
   • type_url=type.googleapis.com/google.container.v1beta1.UpgradeAvailableEvent
   • payload=

{
  "version": "1.17.15-gke.800",
  "resourceType": "MASTER",
  "releaseChannel": {
    "channel": "REGULAR"
  }
}

2. Click the "PUBLISH" button

📚 Any additional information?

This is caused by the data message containing quotes which the code isn't encoding, so invalid JSON is generated.