CRD

goals

• understanding custom resource
• define a custom resource
• create a controller for it

generating custom code:

need to create the types.go defining the struct for CRD need to add to known object in register.go

need to run generate-groups.sh

hack/update file will populated with directory where to gen directory from where to gen group and version

chmod +x hack/update-codegen.sh

chmod + vendor/k8s.io/code-generator/generate-groups.sh

hack/update-codegen.sh

generated Code:

deepcopy

a deep copy for structured that defined in the types.go and commanded to make a deepcopy

clientset

creates the functionality to configure and do any REST  Operation

informer

offers an event based information and react based on changes

lister

offers readonly chaching layer for s get and list

coments that generates codes:

+genclient

+genclient:noStatus

+k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object