Update minikube documentation and dev tooling to 1.12.

build/includes/minikube.mk

@@ -28,17 +28,13 @@
 minikube-test-cluster: DOCKER_RUN_ARGS+=--network=host -v $(minikube_cert_mount)
 minikube-test-cluster: $(ensure-build-image) minikube-agones-profile
 	# localkube bootstrapper fixes issues with profiles
-	$(MINIKUBE) start --kubernetes-version v1.11.5 --vm-driver $(MINIKUBE_DRIVER) \
-		--extra-config=apiserver.authorization-mode=RBAC
+	$(MINIKUBE) start --kubernetes-version v1.12.10 --vm-driver $(MINIKUBE_DRIVER)
 	# wait until the master is up
 	until docker run --rm $(common_mounts) $(DOCKER_RUN_ARGS) $(build_tag) kubectl cluster-info; \
 		do \
 			echo "Waiting for cluster to start..."; \
 			sleep 1; \
 		done
-	# this is needed for kubernetes component to work correctly while RBAC is enabled
-	-docker run --rm $(common_mounts) $(DOCKER_RUN_ARGS) $(build_tag) \
-		kubectl create clusterrolebinding cluster-admin-binding --clusterrole=cluster-admin --serviceaccount=kube-system:default
 	$(MAKE) setup-test-cluster DOCKER_RUN_ARGS="$(DOCKER_RUN_ARGS)"
 	$(MAKE) minikube-post-start
 

site/content/en/docs/Installation/_index.md

@@ -181,12 +181,19 @@ minikube profile agones
 The following command starts a local minikube cluster via virtualbox - but this can be
 replaced by a [vm-driver](https://github.com/kubernetes/minikube#requirements) of your choice.
 
+{{% feature expiryVersion="0.12.0" %}}
 ```bash
 minikube start --kubernetes-version v1.11.0 --vm-driver virtualbox \
 		--extra-config=apiserver.authorization-mode=RBAC
 ```
 
 Continue to [Enabling creation of RBAC resources](#enabling-creation-of-rbac-resources)
+{{% /feature %}}
+{{% feature publishversion="0.12.0" %}}
+```bash
+minikube start --kubernetes-version v1.12.10 --vm-driver virtualbox
+```
+{{% /feature %}}
 
 ## Setting up an Amazon Web Services EKS cluster
 
@@ -280,6 +287,7 @@ Nodes in AKS don't get a Public IP by default. To assign a Public IP to a Node,
 
 Continue to [Installing Agones](#installing-agones).
 
+{{% feature expiryVersion="0.12.0" %}}
 ## Enabling creation of RBAC resources
 
 To install Agones, a service account needs permission to create some special RBAC resource types.
@@ -292,6 +300,7 @@ kubectl create clusterrolebinding cluster-admin-binding \
 kubectl create clusterrolebinding cluster-admin-binding \
   --clusterrole=cluster-admin --serviceaccount=kube-system:default
 ```
+{{% /feature %}}
 
 ## Installing Agones