Pod killer using go client

Thanks to Gianluca for the shared informer implemantation.

Create kind cluster

kind create cluster --config cluster-config.yaml --name crixo

Get dependecies

go mod init github.com/crixo/kind-go-client

# client-go version should match w/ the upstream k8s cluster version
go get k8s.io/client-go@kubernetes-1.16.3

Deploy testing workloads

#kubectl create namespace vote kubectl apply -f kube-deployment.yml

https://github.com/kubernetes/client-go/tree/master/examples/in-cluster-client-configuration kubectl create clusterrolebinding default-view --clusterrole=view --serviceaccount=default:default kubectl create clusterrolebinding client-admin --clusterrole=admin --serviceaccount=default:default

Create docker image

GOOS=linux go build -o ./_builds/app . docker build -t client-go-01:unique-tag -f nobuild.Dockerfile ./_builds/

Load image in kind

kind load docker-image client-go-01:unique-tag --name crixo

Add RBAC permission to the pod w/ go-client

https://github.com/kubernetes/client-go/tree/master/examples/in-cluster-client-configuration kubectl create clusterrolebinding client-admin --clusterrole=admin --serviceaccount=default:default

Deploy in k8s the client-go app

k run pod-killer-by-label --image=kind-go-client:unique-tag --restart=Never

Deploy an nginx container that will be later deleted using dedicated label

k run nginx-to-del --image=nginx --restart=Never

Label the new nginx pod w/ label that riggers the deletion

k label pod nginx delete-pod=true

Delete kind cluster

kind delete cluster --name crixo

Run locally

KUBECONFIG='c:/Users/cristiano.degiorgis/.kube/config' go run main.go

crixo/PodKillerGoClient