An autoscaler for the Vamp Particles canary release demo.
Short demos typically don't generate enough load on the particles-* Pods for the Kubernetes Horizontal Pod Autoscaler to work.
To overcome this, the Particles Autoscaler periodically scapes the /load endpoints on the particles-* Pods and uses that information to autoscale the demo Deployments.
The autoscaler runs as a Kubernetes Job in the same Namespace as the Particles demo.
One autoscaler is required for each version of the Particles service.
The autoscaler is configured using environment variables.
DEPLOYMENT_NAME - The name of the Kubernetes Deployment to be scaled.
DEPLOYMENT_LABELS - The Kubernetes Labels used to identify the Pods managed by the Deployment. These are the labels specified when you create the service in Vamp Cloud.
NAMESPACE - The Namespace to look in for the Deployment. Defaults to the Namespace in which the Job is running.
MAX_REPLICAS - The minimum number of replicas (Pods). The autoscaler will not scale below this value. Defaults to 1 replica. MAX_REPLICAS must be greater than 0.
MAX_REPLICAS - The maximum number of replicas (Pods). The autoscaler will not scale above this value. Defaults to 2 replicas. MAX_REPLICAS must be greater than MAX_REPLICAS.