tweak: ensure max ram is limited to 100%

Author: thirdgen88

ignition/templates/_helpers.tpl

@@ -195,7 +195,7 @@ Assumes that "ignition.gateway.useMaxRAMPercentage" has already been checked.
     {{- end -}}
   {{- end -}}
 
-  {{- printf "%v" $maxRAMPercentage }}
+  {{- printf "%v" (int (min $maxRAMPercentage 100)) }}
 {{- end }}
 
 {{/*

ignition/tests/helpers_test.yaml

@@ -213,6 +213,25 @@ tests:
   - contains:
       path: data["gateway.jvmArgs"]
       content: -XX:InitialRAMPercentage=60
+- it: check gateway.maxRAMPercentage over 100
+  set:
+    gateway.maxRAMPercentage: 150
+  asserts:
+  - contains:
+      path: data["gateway.jvmArgs"]
+      content: -XX:InitialRAMPercentage=100
+- it: check gateway.maxRAMPercentage negative value
+  set:
+    gateway.maxRAMPercentage: -1
+    gateway.resourcesEnabled: false
+  asserts:
+  - equal:
+      path: data["gateway.useMaxRAMPercentage"]
+      value: false
+  - notExists :
+      path: data["gateway.jvmArgs"]
+  - notExists:
+      path: data["gateway.wrapperArgs"]
 - it: check gateway.maxRAMPercentage of auto with resources disabled
   set:
     gateway.maxRAMPercentage: "auto"