opslevel_k8s_controller

opslevel-k8s-controller

A utility library for easily making and running k8s controllers

Installation

go get github.com/opslevel/opslevel-k8s-controller/v2023

Then to create a k8s controller you can simply do

selector := opslevel_k8s_controller.K8SSelector{
    ApiVersion: "apps/v1",
    Kind: "Deployment",
    Excludes: []string{`.metadata.namespace == "kube-system"`}
}
resync := time.Hour*24
batch := 500
runOnce := false
controller, err := opslevel_k8s_controller.NewK8SController(selector, resync, batch, runOnce)
if err != nil {
    //... Handle error ...
}
callback := func(items []interface{}) {
    for _, item := range items {
        // ... Process K8S Resource ...
    }
}
controller.OnAdd = callback
controller.OnUpdate = callback
controller.Start()

Because of the way the selector works you can easily target any k8s resource in your cluster and you have the power of JQ to exclude resources that might match the expression.