Add missing security context to Ranger-Agent pods/containers

This updates the ranger-agent chart to include the pod
security context on the pod template.

This also adds the container security context to set
readOnlyRootFilesystem flag to true

Depends-On: https://review.opendev.org/740119/

Change-Id: I9fe5d96958805ae9634521604845411d904d8458

ranger-agent/templates/job-add-region.yaml

@@ -39,6 +39,7 @@ spec:
 {{ dict "envAll" $envAll "podName" "ranger-agent-add-region" "containerNames" (list "init" "ranger-agent-add-region" ) | include "helm-toolkit.snippets.kubernetes_mandatory_access_control_annotation" | indent 8 }}
     spec:
       serviceAccountName: {{ $serviceAccountName | quote }}
+{{ dict "envAll" $envAll "application" "add_region" | include "helm-toolkit.snippets.kubernetes_pod_security_context" | indent 6 }}
       restartPolicy: Never
       nodeSelector:
         {{ .Values.labels.job.node_selector_key }}: {{ .Values.labels.job.node_selector_value }}
@@ -49,6 +50,7 @@ spec:
           image: {{ .Values.images.tags.scripted_test | quote }}
           imagePullPolicy: {{ $envAll.Values.images.pull_policy | quote }}
 {{ tuple $envAll $envAll.Values.pod.resources.jobs.add_region | include "helm-toolkit.snippets.kubernetes_resources" | indent 10 }}
+{{ dict "envAll" $envAll "application" "add_region" "container" "ranger_agent_add_region" | include "helm-toolkit.snippets.kubernetes_container_security_context" | indent 10 }}
           env:
             - name: PARAMETERS
               value: {{ .Values.conf.region.parameters | quote }}

ranger-agent/templates/pod-test.yaml

@@ -35,12 +35,14 @@ spec:
   serviceAccountName: {{ $serviceAccountName }}
   nodeSelector:
     {{ .Values.labels.test.node_selector_key }}: {{ .Values.labels.test.node_selector_value }}
+{{ dict "envAll" $envAll "application" "test" | include "helm-toolkit.snippets.kubernetes_pod_security_context" | indent 2 }}
   restartPolicy: Never
   initContainers:
 {{ tuple $envAll "tests" $mounts_tests_init | include "helm-toolkit.snippets.kubernetes_entrypoint_init_container" | indent 4 }}
   containers:
     - name: ranger-agent-test
       image: {{ .Values.images.tags.scripted_test }}
+{{ dict "envAll" $envAll "application" "test" "container" "ranger_agent_test" | include "helm-toolkit.snippets.kubernetes_container_security_context" | indent 6 }}
       env:
         - name: RANGER_SERVICE_URL
           value: {{ tuple "ranger_agent" "internal" "api" . | include "helm-toolkit.endpoints.keystone_endpoint_uri_lookup" }}

ranger-agent/values.yaml

@@ -158,6 +158,20 @@ pod:
         ranger_agent_engine:
           readOnlyRootFilesystem: false
           allowPrivilegeEscalation: false
+    add_region:
+      pod:
+        runAsUser: 1000
+      container:
+        ranger_agent_add_region:
+          readOnlyRootFilesystem: true
+          allowPrivilegeEscalation: false
+    test:
+      pod:
+        runAsUser: 1000
+      container:
+        ranger_agent_test:
+          readOnlyRootFilesystem: true
+          allowPrivilegeEscalation: false
   affinity:
     anti:
       type: