K8S Operators

A Site Reliability Engineer (SRE) is a person that operates an application by writing software. They are an engineer, a developer, who knows how to develop software specifically for a particular application domain. The resulting piece of software has an application's operational domain knowledge programmed into it.

An Operator is an application-specific controller that extends the Kubernetes API to create, configure, and manage instances of complex stateful applications on behalf of a Kubernetes user. It builds upon the basic Kubernetes resource and controller concepts but includes domain or application-specific knowledge to automate common tasks.

Prometheus Operator

GitHub - prometheus-operator/prometheus-operator: Prometheus Operator creates/configures/manages Prometheus clusters atop KubernetesGitHub

ETCD Operator

GitHub - coreos/etcd-operator: etcd operator creates/configures/manages etcd clusters atop KubernetesGitHub

References:

Introducing Operators: Putting Operational Knowledge into Software