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FAQ

I have a couple of nodes with low utilization, but they are not scaled down. Why?​

Have you set up the cluster autoscaler?

If the cluster autoscaler is set up, it should be correctly configured to scale down the nodes. To see the possible issues, check the cluster autoscaler documentation.

I want to avoid deploying cert-manager. What are the alternatives?​

You can find alternatives to cert-manager installation in the cert-manager alternatives section.

How much CO2 is produced by a pod?​

These calculations are based on the following assumptions:

  • Emissions for a cloud server using 100% green electricity: 160 Kg CO2eq / year and server (from goclimate.com )
  • Cluster node of 2 CPUs. We approximate 1 node is 1 server
  • 15 pods per node

With this assumption, the mean consumption of CO2 per pod in a year is 160 / 15 = 11 Kg CO2eq / year per pod.

CO2 Calculator

CO2 per pods per year (kg CO2eq)
Total number of pods
Total pods when kube-green active
Hour of sleep per week

Results
Total (Kg CO2eq/week)

76.2% CO2 saved with kube-green
without kube-green: 21
with kube-green: 5

What resources are supported?​

kube-green adds default support to Deployments, StatefulSets, and CronJobs, but it is possible to add support for other resources using the patches feature. More information is available in the configuration section.

How can I contribute to the project?​

You can contribute to the project in many ways.

If you are using kube-green, you can list yourself as an adopter.

If you have some feedback, open an issue or a discussion in the GitHub repository.

If you'd like to contribute to the code, please review the Contributing section and see if there are any existing issues you can work on.