feat(httpd) allow overriding ingress and PV(C)s based on global value from parent chart

charts/httpd/Chart.yaml

@@ -1,4 +1,4 @@
 apiVersion: v1
 description: httpd helm chart for Kubernetes
 name: httpd
-version: 0.1.0
+version: 0.2.0

charts/httpd/templates/_helpers.tpl

@@ -43,3 +43,21 @@ app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
 {{- end }}
 app.kubernetes.io/managed-by: {{ .Release.Service }}
 {{- end -}}
+
+{{/*
+Data directory volume definition. Might be defined from parent chart templates or autonomously
+based on the presence of the global value provided by the parent chart.
+*/}}
+{{- define "httpd.html-volume" -}}
+{{- if (dig "global" "storage" "enabled" false .Values.AsMap) -}}
+persistentVolumeClaim:
+  claimName: {{ include "mirrorbits-parent.pvc-name" . }}
+{{- else }}
+  {{- if or .Values.repository.persistentVolumeClaim.enabled .Values.repository.reuseExistingPersistentVolumeClaim }}
+persistentVolumeClaim:
+  claimName: {{ .Values.repository.name | default (printf "%s-binary" (include "httpd.fullname" .)) }}
+  {{- else }}
+emptyDir: {}
+  {{- end -}}
+{{- end -}}
+{{- end -}}

charts/httpd/templates/deployment.yaml

@@ -1,3 +1,4 @@
+---
 apiVersion: apps/v1
 kind: Deployment
 metadata:
@@ -38,15 +39,13 @@ spec:
           resources:
             {{- toYaml .Values.resources | nindent 12 }}
           volumeMounts:
-            {{ if or .Values.repository.persistentVolumeClaim.enabled .Values.repository.reuseExistingPersistentVolumeClaim -}}
-            - name: binary
-              mountPath: /usr/local/apache2/htdocs
-              readOnly: true
-            {{- end }}
             - name: conf
               mountPath: /usr/local/apache2/conf/httpd.conf
               subPath: httpd.conf
               readOnly: true
+            - name: html
+              mountPath: /usr/local/apache2/htdocs
+              readOnly: true
       {{- with .Values.nodeSelector }}
       nodeSelector:
         {{- toYaml . | nindent 8 }}
@@ -63,8 +62,5 @@ spec:
         - name: conf
           configMap:
             name: {{ include "httpd.fullname" . }}
-        {{ if or .Values.repository.persistentVolumeClaim.enabled .Values.repository.reuseExistingPersistentVolumeClaim -}}
-        - name: binary
-          persistentVolumeClaim:
-            claimName: {{ .Values.repository.name | default (printf "%s-binary" (include "httpd.fullname" .)) }}
-        {{- end }}
+        - name: html
+          {{- include "httpd.html-volume" . | nindent 10}}

charts/httpd/templates/ingress.yaml

@@ -1,4 +1,4 @@
-{{- if .Values.ingress.enabled -}}
+{{- if and .Values.ingress.enabled (not (dig "global" "ingress" "enabled" false .Values.AsMap)) -}}
 {{- $fullName := include "httpd.fullname" . -}}
 {{- $svcPort := .Values.service.port -}}
 apiVersion: networking.k8s.io/v1

charts/httpd/templates/mocks/_helpers.tpl

@@ -0,0 +1,3 @@
+{{- define "mirrorbits-parent.pvc-name" -}}
+parent-chart-shared-data
+{{- end -}}

charts/httpd/templates/persistentVolume.yaml

@@ -1,4 +1,4 @@
-{{ if $.Values.repository.persistentVolume.enabled -}}
+{{ if and .Values.repository.persistentVolume.enabled (not (dig "global" "ingress" "enabled" false .Values.AsMap)) -}}
 ---
 apiVersion: v1
 kind: PersistentVolume

charts/httpd/templates/persistentVolumeClaim.yaml

@@ -1,4 +1,4 @@
-{{ if .Values.repository.persistentVolumeClaim.enabled -}}
+{{ if and .Values.repository.persistentVolumeClaim.enabled (not (dig "global" "ingress" "enabled" false .Values.AsMap)) -}}
 ---
 apiVersion: v1
 kind: PersistentVolumeClaim

charts/httpd/tests/custom_values_test.yaml

@@ -4,6 +4,20 @@ templates:
   - ingress.yaml
   - secret.yaml # Direct dependency of deployment.yaml
   - service.yaml
+  - persistentVolume.yaml
+  - persistentVolumeClaim.yaml
+set:
+  image:
+    pullPolicy: Never
+  repository:
+    reuseExistingPersistentVolumeClaim: true
+  ingress:
+    enabled: true
+    hosts:
+      - host: chart-example.local
+        paths:
+        - path: /
+          pathType: IfNotPresent
 tests:
   - it: Should set the correct service selector labels when a fullNameOverride is specified
     template: service.yaml
@@ -37,9 +51,6 @@ tests:
           value: "RELEASE-NAME"
   - it: should define a customized deployment
     template: deployment.yaml
-    set:
-      image:
-        pullPolicy: Never
     asserts:
       - hasDocuments:
           count: 1
@@ -48,33 +59,39 @@ tests:
       - equal:
           path: spec.template.spec.containers[*].imagePullPolicy
           value: Never
-  - it: should define a "binary" volume if reuseExistingPersistentVolumeClaim is true
+  - it: should define a volume 'html' if reuseExistingPersistentVolumeClaim is true
     template: deployment.yaml
-    set:
-      repository:
-        reuseExistingPersistentVolumeClaim: true
     asserts:
       - hasDocuments:
           count: 1
       - isKind:
           of: Deployment
-      - lengthEqual:
-          path: spec.template.spec.volumes
-          count: 2
-      - contains:
-          path: spec.template.spec.volumes
-          content:
-            name: "binary"
-          any: true
-      - lengthEqual:
-          path: spec.template.spec.containers[0].volumeMounts
-          count: 2
-      - contains:
-          path: spec.template.spec.containers[0].volumeMounts
-          content:
-            name: "binary"
-          any: true
-  - it: should define a "binary" volume if repository.persistentVolumeClaim.enabled is true
+      - equal:
+          path: spec.template.spec.volumes[0].name
+          value: conf
+      - equal:
+          path: spec.template.spec.containers[0].volumeMounts[0].name
+          value: conf
+      - equal:
+          path: spec.template.spec.containers[0].volumeMounts[0].readOnly
+          value: true
+      # HTML volume uses an existing PVC (specified by values)
+      - equal:
+          path: spec.template.spec.volumes[1].name
+          value: html
+      - equal:
+          path: spec.template.spec.volumes[1].persistentVolumeClaim.claimName
+          value: httpd-binary
+      - equal:
+          path: spec.template.spec.containers[0].volumeMounts[1].name
+          value: html
+      - equal:
+          path: spec.template.spec.containers[0].volumeMounts[1].readOnly
+          value: true
+      - equal:
+          path: spec.template.spec.containers[0].volumeMounts[1].mountPath
+          value: /usr/local/apache2/htdocs
+  - it: should define a managed "html" volume if repository.persistentVolumeClaim.enabled is true
     template: deployment.yaml
     set:
       repository:
@@ -85,32 +102,33 @@ tests:
           count: 1
       - isKind:
           of: Deployment
-      - lengthEqual:
-          path: spec.template.spec.volumes
-          count: 2
-      - contains:
-          path: spec.template.spec.volumes
-          content:
-            name: "binary"
-          any: true
-      - lengthEqual:
-          path: spec.template.spec.containers[0].volumeMounts
-          count: 2
-      - contains:
-          path: spec.template.spec.containers[0].volumeMounts
-          content:
-            name: "binary"
-          any: true
+      - equal:
+          path: spec.template.spec.volumes[0].name
+          value: conf
+      - equal:
+          path: spec.template.spec.containers[0].volumeMounts[0].name
+          value: conf
+      - equal:
+          path: spec.template.spec.containers[0].volumeMounts[0].readOnly
+          value: true
+      # HTML volume uses an existing PVC (specified by values)
+      - equal:
+          path: spec.template.spec.volumes[1].name
+          value: html
+      - equal:
+          path: spec.template.spec.volumes[1].persistentVolumeClaim.claimName
+          value: httpd-binary
+      - equal:
+          path: spec.template.spec.containers[0].volumeMounts[1].name
+          value: html
+      - equal:
+          path: spec.template.spec.containers[0].volumeMounts[1].readOnly
+          value: true
+      - equal:
+          path: spec.template.spec.containers[0].volumeMounts[1].mountPath
+          value: /usr/local/apache2/htdocs
   - it: should create ingress with pathType set to the specified custom value by default
     template: ingress.yaml
-    set:
-      ingress:
-        enabled: true
-        hosts:
-          - host: chart-example.local
-            paths:
-            - path: /
-              pathType: IfNotPresent
     asserts:
       - hasDocuments:
           count: 1

charts/httpd/tests/defaults_test.yaml

@@ -5,30 +5,15 @@ templates:
   - ingress.yaml
   - secret.yaml # Direct dependency of deployment(.*).yaml
   - service.yaml
+  - persistentVolume.yaml
+  - persistentVolumeClaim.yaml
 tests:
   - it: should not create any ingress by default
     template: ingress.yaml
     asserts:
       - hasDocuments:
           count: 0
-  - it: should create ingress with pathType set to Prefix by default
-    template: ingress.yaml
-    set:
-      ingress:
-        enabled: true
-        hosts:
-          - host: chart-example.local
-            paths:
-            - path: /
-    asserts:
-      - hasDocuments:
-          count: 1
-      - isKind:
-          of: Ingress
-      - equal:
-          path: spec.rules[0].http.paths[0].pathType
-          value: "Prefix"
-  - it: should set the correct service selector labels
+  - it: should create a service with default values
     template: service.yaml
     asserts:
       - hasDocuments:
@@ -41,20 +26,7 @@ tests:
       - equal:
           path: spec.selector["app.kubernetes.io/instance"]
           value: "RELEASE-NAME"
-  - it: Should set the correct deployment metadata labels
-    template: deployment.yaml
-    asserts:
-      - hasDocuments:
-          count: 1
-      - isKind:
-          of: Deployment
-      - equal:
-          path: spec.template.metadata.labels["app.kubernetes.io/name"]
-          value: "httpd"
-      - equal:
-          path: spec.template.metadata.labels["app.kubernetes.io/instance"]
-          value: "RELEASE-NAME"
-  - it: should define the default deployment with default imagePullPolicy and metadata labels, and only a "conf" volume
+  - it: should create a Deployment with default values
     template: deployment.yaml
     asserts:
       - hasDocuments:
@@ -68,17 +40,40 @@ tests:
           path: spec.template.metadata.labels["app.kubernetes.io/instance"]
           value: "RELEASE-NAME"
       - equal:
-          path: spec.template.spec.containers[0].imagePullPolicy
+          path: "spec.template.spec.containers[*].imagePullPolicy"
           value: IfNotPresent
-      - lengthEqual:
-          path: spec.template.spec.volumes
-          count: 1
       - equal:
           path: spec.template.spec.volumes[0].name
-          value: "conf"
-      - lengthEqual:
-          path: spec.template.spec.containers[0].volumeMounts
-          count: 1
+          value: conf
       - equal:
           path: spec.template.spec.containers[0].volumeMounts[0].name
-          value: "conf"
+          value: conf
+      - equal:
+          path: spec.template.spec.containers[0].volumeMounts[0].readOnly
+          value: true
+      # HTML volume is an emptydir by default
+      - equal:
+          path: spec.template.spec.volumes[1].name
+          value: html
+      - equal:
+          path: spec.template.spec.volumes[1].emptyDir
+          value: {}
+      - equal:
+          path: spec.template.spec.containers[0].volumeMounts[1].name
+          value: html
+      - equal:
+          path: spec.template.spec.containers[0].volumeMounts[1].readOnly
+          value: true
+      - equal:
+          path: spec.template.spec.containers[0].volumeMounts[1].mountPath
+          value: /usr/local/apache2/htdocs
+  - it: should not define any persistent volume
+    template: persistentVolume.yaml
+    asserts:
+      - hasDocuments:
+          count: 0
+  - it: should not define any PV claim
+    template: persistentVolumeClaim.yaml
+    asserts:
+      - hasDocuments:
+          count: 0