README.md

crgen

Generate multiple CR instances for a CRD

Usage

Assumming you have a CRD my.crd.full.name/MyCRD in mynamespace with 4 required fields spec1,2,3,4; The following code snippet creates 255 * 1 * 5 * 1 = 1275 CR yaml files that can be installed on the cluster (using kubectl apply -f) for stress tests:

import "github.com/gshirazi/crgen/pkg/crgen"

spec1Gen, err := crgen.NewIPNetGen("100.100.100.0/24")
if err != nil {
    log.Errorf("Could not create spec1Gen: %v", err)
    panic(err)
}

spec2Gen, err := crgen.NewSingletonGen("elem1,elem2", 1, "array")
if err != nil {
    log.Errorf("Could not create spec2Gen: %v", err)
    panic(err)
}

spec3Gen, err := crgen.NewSingletonGen("100", 5, "int")
if err != nil {
    log.Errorf("Could not create spec3Gen: %v", err)
    panic(err)
}

spec4Gen, err := crgen.NewSingletonGen("mystring", 1, "string")
if err != nil {
    log.Errorf("Could not create spec4Gen: %v", err)
    panic(err)
}

func main() {
	myCRGen := crgen.CRGen{
		ClusterConfigPath: "/etc/rancher/k3s/k3s.yaml",
		CRDName: "my.crd.full.name",
		CRDNamespace: "mynamespace",
		CRDVersion: "v1",
		CRApiVersion: "gshirazi.github.com/v1",
		CRKind: "MyCRD",
		Generators: map[string]crgen.Generator{
			"spec1": spec1Gen,
			"spec2": spec2Gen,
			"spec3": spec3Gen,
			"spec4": spec4Gen,
		},
	}
	if err := myCRGen.Generate(); err != nil {
		panic(err)
	}
}

As it can be seen, crgen supports iterating over IPs, and is also capable of generating int, array and string types. A custom type can be added by implementing GenVal and its MarshalYAML().