Scale Kubernetes deployments based on Prometheus alerts.
The autoscaler is registered as a webhook alertmanager receiver. When an alert is forwarded to this receiver the alertmanager will contact the autoscaler.
The notifications send by the alertmanager need to contain these annotations:
alertmanager-config.yaml:
global:
resolve_timeout: 5m
route:
group_by: ['service']
group_wait: 10s
group_interval: 10s
repeat_interval: 1h
receiver: 'webhook'
receivers:
- name: 'webhook'
webhook_configs:
- url: 'http://prometheus-kubernetes-autoscaler-go/alert| name | description |
|---|---|
| deployment | name of the deployment that should be scaled |
| action | scaling that should be performed. Either up or down |
To run this project you need the following tools:
- Run
helmfile syncto install the alertmanager - Run
draft upto install the autoscaler - Port-forward the alertmanager api to
localhost:9093. - Run
generate-alert.shto generate an alert and watch the scaling happen
MIT License
Copyright (c) 2018 Lukas Eichler
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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