added json coverage for scheduler (#2335)

* added coverage for scheduler

* passed the variable to scheduler config

* changes implemeneted

Co-authored-by: Marek Siarkowicz <marek.siarkowicz@protonmail.com>

* added cluster_log_format

* minor fix

* minor fix remove $

* minor fix define cluster_log_format

* minor fix

* json coverage for scheduler

Co-authored-by: Marek Siarkowicz <marek.siarkowicz@protonmail.com>

hack/ci/e2e-k8s.sh

@@ -70,9 +70,10 @@ create_cluster() {
   # Default Log level for all components in test clusters
   KIND_CLUSTER_LOG_LEVEL=${KIND_CLUSTER_LOG_LEVEL:-4}
 
+  CLUSTER_LOG_FORMAT=${CLUSTER_LOG_FORMAT:-} 
   # potentially enable --logging-format
   kubelet_extra_args="      \"v\": \"${KIND_CLUSTER_LOG_LEVEL}\""
-  if [ -n "${KUBELET_LOG_FORMAT:-}" ]; then
+  if [ -n "${KUBELET_LOG_FORMAT:-$CLUSTER_LOG_FORMAT}" ]; then
     case "${KUBE_VERSION}" in
      v1.1[0-8].*)
       echo "KUBELET_LOG_FORMAT is only supported on versions >= v1.19, got ${KUBE_VERSION}"
@@ -86,6 +87,21 @@ create_cluster() {
     esac
   fi
 
+  scheduler_extra_args="      \"v\": \"${KIND_CLUSTER_LOG_LEVEL}\""
+  if [ -n "${SCHEDULER_LOG_FORMAT:-$CLUSTER_LOG_FORMAT}" ]; then
+    case "${KUBE_VERSION}" in
+     v1.1[0-8].*)
+      echo "SCHEDULER_LOG_FORMAT is only supported on versions >= v1.19, got ${KUBE_VERSION}"
+      exit 1
+      ;;
+    *)
+      # NOTE: the indendation on the next line is meaningful!
+      scheduler_extra_args="${scheduler_extra_args}
+        \"logging-format\": \"${SCHEDULER_LOG_FORMAT}\""
+      ;;
+    esac
+  fi
+
   # JSON map injected into featureGates config
   feature_gates="{}"
   # --runtime-config argument value passed to the API server
@@ -147,7 +163,7 @@ kubeadmConfigPatches:
       "v": "${KIND_CLUSTER_LOG_LEVEL}"
   scheduler:
     extraArgs:
-      "v": "${KIND_CLUSTER_LOG_LEVEL}"
+${scheduler_extra_args}
   ---
   kind: InitConfiguration
   nodeRegistration: