[feat] support passing extra args to kind

Author: DerekTBrown

examples/kind_extra_args.yaml

@@ -0,0 +1,14 @@
+# Creates a kind cluster with a registry.
+apiVersion: ctlptl.dev/v1alpha1
+kind: Cluster
+product: kind
+registry: ctlptl-registry
+kindExtraArguments:
+# Example 1: Pass --wait to `kind create cluster` to wait for the control plane to be ready.
+- "--wait=2m"
+# Example 2: Pass --retain to `kind create cluster` to keep the containers around.
+# This is super useful for debugging cluster creation issues.
+- "--retain"
+# Example 3: Pass --verbosity=3 to `kind create cluster` to get more verbose output.
+- # This is also super useful for debugging cluster creation issues
+- "--verbosity=3"

pkg/api/types.go

@@ -62,6 +62,9 @@ type Cluster struct {
 	// wins over one specified in the Kind config.
 	KindV1Alpha4Cluster *v1alpha4.Cluster `json:"kindV1Alpha4Cluster,omitempty" yaml:"kindV1Alpha4Cluster,omitempty"`
 
+	// Extra command line arguments passed to Kind CLI. Only applicable to clusters with the product: kind.
+	KindExtraArguments []string `json:"kindExtraArguments,omitempty" yaml:"kindExtraArguments,omitempty"`
+
 	// The Minikube cluster config. Only applicable for clusters with product: minikube.
 	Minikube *MinikubeCluster `json:"minikube,omitempty" yaml:"minikube,omitempty"`
 

pkg/cluster/admin_kind.go

@@ -147,6 +147,7 @@ func (a *kindAdmin) Create(ctx context.Context, desired *api.Cluster, registry *
 		return errors.Wrap(err, "creating kind cluster")
 	}
 
+	args = append(args, desired.KindExtraArguments...)
 	args = append(args, "--config", "-")
 
 	iostreams := a.iostreams