Add security context template to prometheus-blackbox-exporter

This change adds security context template at pod level to implement
runAsUser flag

This change adds security context template at container level to implement
readOnly-fs flag

Change-Id: Icbea3487c058d88188061d0d5a77458dce910884

prometheus-blackbox-exporter/templates/deployment.yaml

@@ -34,12 +34,14 @@ spec:
       annotations:
 {{ dict "envAll" $envAll "podName" "prometheus-blackbox-exporter" "containerNames" (list "blackbox-exporter") | include "helm-toolkit.snippets.kubernetes_mandatory_access_control_annotation" | indent 8 }}
     spec:
+{{ dict "envAll" $envAll "application" "prometheus_blackbox_exporter" | include "helm-toolkit.snippets.kubernetes_pod_security_context" | indent 6 }}
       nodeSelector:
         {{ .Values.labels.blackbox_exporter.node_selector_key }}: {{ .Values.labels.blackbox_exporter.node_selector_value | quote }}
       containers:
       - name: blackbox-exporter
 {{ tuple $envAll "prometheus_blackbox_exporter" | include "helm-toolkit.snippets.image" | indent 8 }}
 {{ tuple $envAll $envAll.Values.pod.resources.prometheus_blackbox_exporter | include "helm-toolkit.snippets.kubernetes_resources" | indent 8 }}
+{{ dict "envAll" $envAll "application" "prometheus_blackbox_exporter" "container" "blackbox_exporter" | include "helm-toolkit.snippets.kubernetes_container_security_context" | indent 8 }}
         args:
           - "--config.file=/config/blackbox.yaml"
         ports:

prometheus-blackbox-exporter/values.yaml

@@ -47,6 +47,14 @@ endpoints:
         default: 9115
 
 pod:
+  security_context:
+    prometheus_blackbox_exporter:
+      pod:
+        runAsUser: 65534
+      container:
+        blackbox_exporter:
+          allowPrivilegeEscalation: false
+          readOnlyRootFilesystem: true
   replicas:
     prometheus_blackbox_exporter: 1
   annotations: