This directory contains a Kubernetes chart to deploy a GCP Night King service. The Night King service is a service that restarts preempted GCE instances.
It uses Google Cloud Pub/Sub for reporting instance preemption.
When a machine is about to be preempted, if it should be restarted, it should publish a Pub/Sub message to a known topic. The Night King service subscribes to the Pub/Subtopic and tries to restart instances accordingly, once they are terminated.
This chart will do the following:
The service is implemented in Go, and prebuilt Docker images are provided. In either case, you’ll need to have Google Cloud SDK authorization set up for the service to be able to receive messages from Google Pub/Sub and use the GCE Compute API.
The Docker bind-mount is useful to share your host Google Cloud credentials – feel free to use other methods to obtain appropriate Google Cloud credentials inside Docker.
There are multiple ways to have the service running “in production” (e.g., not in the foreground of your dev-machine terminal).
You can use whatever method fits your environment (deployment-setup contributions are welcome). See below details for already-supprted methods.
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