Set "minimum" tag in Makefile; Bump to K8s v1.19

Signed-off-by: Dale Haiducek <19750917+dhaiducek@users.noreply.github.com>

.github/workflows/kind.yml

@@ -22,11 +22,11 @@ jobs:
       REGISTRY: localhost:5000
     strategy:
       matrix:
-        # Run tests on oldest and newest supported OCP Kubernetes
-        # - OCP 4.5 runs Kubernetes v1.18
+        # Run tests on minimum and newest supported OCP Kubernetes
+        # The "minimum" tag is set in the Makefile
         # KinD tags: https://hub.docker.com/r/kindest/node/tags
         kind:
-          - 'v1.18.15'
+          - 'minimum'
           - 'latest'
     name: KinD tests
     steps:

Makefile

@@ -34,7 +34,10 @@ KIND_NAMESPACE ?= open-cluster-management-agent-addon
 KIND_VERSION ?= latest
 MANAGED_CLUSTER_NAME ?= managed
 WATCH_NAMESPACE ?= $(MANAGED_CLUSTER_NAME)
-ifneq ($(KIND_VERSION), latest)
+# Set the Kind version tag
+ifeq ($(KIND_VERSION), minimum)
+	KIND_ARGS = --image kindest/node:v1.19.16
+else ifneq ($(KIND_VERSION), latest)
 	KIND_ARGS = --image kindest/node:$(KIND_VERSION)
 else
 	KIND_ARGS =