Add modifyset for removing Azure spot taint (#93)

Makefile

@@ -33,6 +33,13 @@ generate: get-external
 		cp $$D $$CONTRAINTS_GENERATED/$$FILENAME
 	done
 
+	MODIFYSETS_LIBRARY=$$(ls -d ./library/modifysets/*)
+	for D in $$MODIFYSETS_LIBRARY
+	do
+		FILENAME=$$(basename $$D)
+		cp $$D $$CONTRAINTS_GENERATED/$$FILENAME
+	done
+
 	CONSTRAINT_LIBRARY=$$(ls -d ./library/constraints/*/)
 	for D in $$CONSTRAINT_LIBRARY
 	do

charts/gatekeeper-library-constraints/generated/remove-azure-node-spot-taints.yaml

@@ -0,0 +1,17 @@
+apiVersion: mutations.gatekeeper.sh/v1beta1
+kind: ModifySet
+metadata:
+  name: remove-azure-node-spot-taints
+spec:
+  location: "spec.taints"
+  applyTo:
+    - groups: [""]
+      kinds: ["Node"]
+      versions: ["v1"]
+  parameters:
+    operation: prune
+    values:
+      fromList:
+        - effect: NoSchedule
+          key: kubernetes.azure.com/scalesetpriority
+          value: spot

library/modifysets/remove-azure-node-spot-taints.yaml

@@ -0,0 +1,17 @@
+apiVersion: mutations.gatekeeper.sh/v1beta1
+kind: ModifySet
+metadata:
+  name: remove-azure-node-spot-taints
+spec:
+  location: "spec.taints"
+  applyTo:
+    - groups: [""]
+      kinds: ["Node"]
+      versions: ["v1"]
+  parameters:
+    operation: prune
+    values:
+      fromList:
+        - effect: NoSchedule
+          key: kubernetes.azure.com/scalesetpriority
+          value: spot