Test against k8s 1.31 (#432)

Author: timebertt

Makefile

@@ -9,7 +9,7 @@ WEBHOSTING_OPERATOR_IMG ?= $(GHCR_REPO)/webhosting-operator:$(TAG)
 EXPERIMENT_IMG ?= $(GHCR_REPO)/experiment:$(TAG)
 
 # ENVTEST_K8S_VERSION refers to the version of kubebuilder assets to be downloaded by envtest binary.
-ENVTEST_K8S_VERSION = 1.28
+ENVTEST_K8S_VERSION = 1.31
 
 # Setting SHELL to bash allows bash commands to be executed by recipes.
 # Options are set to exit when a recipe line exits non-zero or a piped command fails.

hack/config/kind-config.yaml

@@ -2,7 +2,7 @@ apiVersion: kind.x-k8s.io/v1alpha4
 kind: Cluster
 nodes:
 - role: control-plane
-  image: kindest/node:v1.28.15
+  image: kindest/node:v1.31.4
   extraPortMappings:
   # ingress-nginx
   - containerPort: 30888

hack/config/shoot.yaml

@@ -24,7 +24,7 @@ spec:
       nodeCIDRMaskSize: 24
     kubeProxy:
       mode: IPTables
-    version: "1.28"
+    version: "1.31"
   maintenance:
     autoUpdate:
       kubernetesVersion: true