Implement Security Context for Heat

Implement container security context for the following Heat resources:
 - Heat server deployment

Change-Id: I4c1efb0807c56f750cc8d74155b96f06735e5051

heat/templates/deployment-api.yaml

@@ -46,8 +46,6 @@ spec:
         configmap-bin-hash: {{ tuple "configmap-bin.yaml" . | include "helm-toolkit.utils.hash" }}
         configmap-etc-hash: {{ tuple "configmap-etc.yaml" . | include "helm-toolkit.utils.hash" }}
     spec:
-      securityContext:
-        readOnlyRootFilesystem: true
       serviceAccountName: {{ $serviceAccountName }}
 {{ dict "envAll" $envAll "application" "heat" | include "helm-toolkit.snippets.kubernetes_pod_security_context" | indent 6 }}
       affinity:
@@ -61,8 +59,7 @@ spec:
         - name: heat-api
 {{ tuple $envAll "heat_api" | include "helm-toolkit.snippets.image" | indent 10 }}
 {{ tuple $envAll $envAll.Values.pod.resources.api | include "helm-toolkit.snippets.kubernetes_resources" | indent 10 }}
-          securityContext:
-            allowPrivilegeEscalation: false
+{{ dict "envAll" $envAll "application" "heat" "container" "heat_api" | include "helm-toolkit.snippets.kubernetes_container_security_context" | indent 10 }}
           command:
             - /tmp/heat-api.sh
             - start

heat/templates/deployment-cfn.yaml

@@ -46,8 +46,6 @@ spec:
         configmap-bin-hash: {{ tuple "configmap-bin.yaml" . | include "helm-toolkit.utils.hash" }}
         configmap-etc-hash: {{ tuple "configmap-etc.yaml" . | include "helm-toolkit.utils.hash" }}
     spec:
-      securityContext:
-        readOnlyRootFilesystem: true
       serviceAccountName: {{ $serviceAccountName }}
 {{ dict "envAll" $envAll "application" "heat" | include "helm-toolkit.snippets.kubernetes_pod_security_context" | indent 6 }}
       affinity:
@@ -61,8 +59,7 @@ spec:
         - name: heat-cfn
 {{ tuple $envAll "heat_cfn" | include "helm-toolkit.snippets.image" | indent 10 }}
 {{ tuple $envAll $envAll.Values.pod.resources.cfn | include "helm-toolkit.snippets.kubernetes_resources" | indent 10 }}
-          securityContext:
-            allowPrivilegeEscalation: false
+{{ dict "envAll" $envAll "application" "heat" "container" "heat_cfn" | include "helm-toolkit.snippets.kubernetes_container_security_context" | indent 10 }}
           command:
             - /tmp/heat-cfn.sh
             - start

heat/templates/deployment-cloudwatch.yaml

@@ -46,8 +46,6 @@ spec:
         configmap-bin-hash: {{ tuple "configmap-bin.yaml" . | include "helm-toolkit.utils.hash" }}
         configmap-etc-hash: {{ tuple "configmap-etc.yaml" . | include "helm-toolkit.utils.hash" }}
     spec:
-      securityContext:
-        readOnlyRootFilesystem: true
       serviceAccountName: {{ $serviceAccountName }}
 {{ dict "envAll" $envAll "application" "heat" | include "helm-toolkit.snippets.kubernetes_pod_security_context" | indent 6 }}
       affinity:
@@ -61,8 +59,7 @@ spec:
         - name: heat-cloudwatch
 {{ tuple $envAll "heat_cloudwatch" | include "helm-toolkit.snippets.image" | indent 10 }}
 {{ tuple $envAll $envAll.Values.pod.resources.cloudwatch | include "helm-toolkit.snippets.kubernetes_resources" | indent 10 }}
-          securityContext:
-            allowPrivilegeEscalation: false
+{{ dict "envAll" $envAll "application" "heat" "container" "heat_cloudwatch" | include "helm-toolkit.snippets.kubernetes_container_security_context" | indent 10 }}
           command:
             - /tmp/heat-cloudwatch.sh
             - start

heat/templates/deployment-engine.yaml

@@ -54,8 +54,6 @@ spec:
         configmap-etc-hash: {{ tuple "configmap-etc.yaml" . | include "helm-toolkit.utils.hash" }}
 {{- end }}
     spec:
-      securityContext:
-        readOnlyRootFilesystem: true
       serviceAccountName: {{ $serviceAccountName }}
 {{ dict "envAll" $envAll "application" "heat" | include "helm-toolkit.snippets.kubernetes_pod_security_context" | indent 6 }}
       affinity:
@@ -69,8 +67,7 @@ spec:
         - name: heat-engine
 {{ tuple $envAll "heat_engine" | include "helm-toolkit.snippets.image" | indent 10 }}
 {{ tuple $envAll $envAll.Values.pod.resources.engine | include "helm-toolkit.snippets.kubernetes_resources" | indent 10 }}
-          securityContext:
-            allowPrivilegeEscalation: false
+{{ dict "envAll" $envAll "application" "heat" "container" "heat_engine" | include "helm-toolkit.snippets.kubernetes_container_security_context" | indent 10 }}
           command:
             - /tmp/heat-engine.sh
             - start

heat/values.yaml

@@ -954,9 +954,23 @@ endpoints:
     namespace: kube-public
 
 pod:
-  user:
+  security_context:
     heat:
-      uid: 42424
+      pod:
+        runAsUser: 42424
+      container:
+        heat_api:
+          readOnlyRootFilesystem: true
+          allowPrivilegeEscalation: false
+        heat_cfn:
+          readOnlyRootFilesystem: true
+          allowPrivilegeEscalation: false
+        heat_cloudwatch:
+          readOnlyRootFilesystem: true
+          allowPrivilegeEscalation: false
+        heat_engine:
+          readOnlyRootFilesystem: true
+          allowPrivilegeEscalation: false
   affinity:
     anti:
       type: