feature: imagePullSecrets from string array. (#576)

* allow configuring imagePullSecrets from an array of strings in
  addition to the already supported array of maps

templates/_helpers.tpl

@@ -623,3 +623,20 @@ Inject extra environment populated by secrets, if populated
 {{ "https" }}
 {{- end -}}
 {{- end -}}
+
+{{/*
+imagePullSecrets generates pull secrets from either string or map values.
+A map value must be indexable by the key 'name'.
+*/}}
+{{- define "imagePullSecrets" -}}
+{{- with .Values.global.imagePullSecrets -}}
+imagePullSecrets:
+{{- range . -}}
+{{- if typeIs "string" . }}
+  - name: {{ . }}
+{{- else if index . "name" }}
+  - name: {{ .name }}
+{{- end }}
+{{- end -}}
+{{- end -}}
+{{- end -}}

templates/csi-daemonset.yaml

@@ -77,8 +77,5 @@ spec:
        {{- if .Values.csi.volumes }}
          {{- toYaml .Values.csi.volumes | nindent 8}}
        {{- end }}
-      {{- if .Values.global.imagePullSecrets }}
-      imagePullSecrets:
-        {{- toYaml .Values.global.imagePullSecrets | nindent 8 }}
-      {{- end }}
+      {{- include "imagePullSecrets" . | nindent 6 }}
 {{- end }}

templates/injector-deployment.yaml

@@ -174,8 +174,5 @@ spec:
           secret:
             secretName: "{{ .Values.injector.certs.secretName }}"
 {{- end }}
-      {{- if .Values.global.imagePullSecrets }}
-      imagePullSecrets:
-        {{- toYaml .Values.global.imagePullSecrets | nindent 8 }}
-      {{- end }}
+      {{- include "imagePullSecrets" . | nindent 6 }}
 {{ end }}

templates/server-statefulset.yaml

@@ -202,10 +202,7 @@ spec:
         {{- if .Values.server.extraContainers }}
           {{ toYaml .Values.server.extraContainers | nindent 8}}
         {{- end }}
-      {{- if .Values.global.imagePullSecrets }}
-      imagePullSecrets:
-        {{- toYaml .Values.global.imagePullSecrets | nindent 8 }}
-      {{- end }}
+      {{- include "imagePullSecrets" . | nindent 6 }}
   {{ template "vault.volumeclaims" . }}
 {{ end }}
 {{ end }}

test/unit/csi-daemonset.bats

@@ -72,6 +72,33 @@ load _helpers
       . | tee /dev/stderr |
       yq -r '.spec.template.spec.imagePullSecrets' | tee /dev/stderr)
 
+  local actual=$(echo $object |
+     yq -r '. | length' | tee /dev/stderr)
+  [ "${actual}" = "2" ]
+
+  local actual=$(echo $object |
+     yq -r '.[0].name' | tee /dev/stderr)
+  [ "${actual}" = "foo" ]
+
+  local actual=$(echo $object |
+      yq -r '.[1].name' | tee /dev/stderr)
+  [ "${actual}" = "bar" ]
+}
+
+@test "csi/daemonset: Custom imagePullSecrets - string array" {
+  cd `chart_dir`
+  local object=$(helm template \
+      --show-only templates/csi-daemonset.yaml  \
+      --set "csi.enabled=true" \
+      --set 'global.imagePullSecrets[0]=foo' \
+      --set 'global.imagePullSecrets[1]=bar' \
+      . | tee /dev/stderr |
+      yq -r '.spec.template.spec.imagePullSecrets' | tee /dev/stderr)
+
+  local actual=$(echo $object |
+     yq -r '. | length' | tee /dev/stderr)
+  [ "${actual}" = "2" ]
+
   local actual=$(echo $object |
      yq -r '.[0].name' | tee /dev/stderr)
   [ "${actual}" = "foo" ]

test/unit/server-statefulset.bats

@@ -146,6 +146,32 @@ load _helpers
       . | tee /dev/stderr |
       yq -r '.spec.template.spec.imagePullSecrets' | tee /dev/stderr)
 
+  local actual=$(echo $object |
+     yq -r '. | length' | tee /dev/stderr)
+  [ "${actual}" = "2" ]
+
+  local actual=$(echo $object |
+     yq -r '.[0].name' | tee /dev/stderr)
+  [ "${actual}" = "foo" ]
+
+  local actual=$(echo $object |
+      yq -r '.[1].name' | tee /dev/stderr)
+  [ "${actual}" = "bar" ]
+}
+
+@test "server/standalone-StatefulSet: Custom imagePullSecrets - string array" {
+  cd `chart_dir`
+  local object=$(helm template \
+      --show-only templates/server-statefulset.yaml  \
+      --set 'global.imagePullSecrets[0]=foo' \
+      --set 'global.imagePullSecrets[1]=bar' \
+      . | tee /dev/stderr |
+      yq -r '.spec.template.spec.imagePullSecrets' | tee /dev/stderr)
+
+  local actual=$(echo $object |
+     yq -r '. | length' | tee /dev/stderr)
+  [ "${actual}" = "2" ]
+
   local actual=$(echo $object |
      yq -r '.[0].name' | tee /dev/stderr)
   [ "${actual}" = "foo" ]

values.yaml

@@ -5,6 +5,7 @@ global:
   # will enable or disable all the components within this chart by default.
   enabled: true
   # Image pull secret to use for registry authentication.
+  # Alternatively, the value may be specified as an array of strings.
   imagePullSecrets: []
   # imagePullSecrets:
   #   - name: image-pull-secret