DevConf.US 2022

In 2021, an ACM technology brief estimated that the information and communication technology (ICT) sector contributed between 1.8% and 3.9% of global carbon emissions. As organizations aim to improve their sustainability credentials, they will inevitably consider the impact of computing in terms of hardware and software. Companies are also under pressure from governments to adopt more sustainable practices. Initially proposed in July 2021 and still awaiting approval, the European Energy directive on energy efficiency has policies that will require any datacenter, however small, to do energy audits every four years and report findings. Hyperscale facilities are going to have to report their energy audits annually. Currently, the energy consumption metrics are only available at node levels. There is no way to obtain container-level energy consumption. Autoscalers and schedulers really need pod-level metrics data in order to obtain energy savings from resizing or migrating containers. We present Kubernetes-based Efficient Power Level Exporter (Kepler) and its integration with Kubernetes. By leveraging eBPF programs, Kepler probes per container energy consumption related system counters and exports them as metrics. These metrics help end users observe their containers’ energy consumption and allow cluster admins to make intelligent decisions on achieving energy conservation goals. We demonstrate that the Kepler can be easily integrated into Prometheus and the existing dashboard.