Add environment variables on container specs

coredns · Jan 14, 2023 · 4479897 · 4479897
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diff --git a/charts/coredns/README.md b/charts/coredns/README.md
@@ -95,6 +95,7 @@ The command removes all the Kubernetes components associated with the chart and
 | `extraVolumes`                                  | Optional array of volumes to create                                                                                                       | []                                                          |
 | `extraVolumeMounts`                             | Optional array of volumes to mount inside the CoreDNS container                                                                           | []                                                          |
 | `extraSecrets`                                  | Optional array of secrets to mount inside the CoreDNS container                                                                           | []                                                          |
+| `env`                                          | Optional array of environment variables for CoreDNS container                                                                           | []                                                          |
 | `customLabels`                                  | Optional labels for Deployment(s), Pod, Service, ServiceMonitor objects                                                                   | {}                                                          |
 | `customAnnotations`                             | Optional annotations for Deployment(s), Pod, Service, ServiceMonitor objects
 | `rollingUpdate.maxUnavailable`                  | Maximum number of unavailable replicas during rolling update                                                                              | `1`                                                         |

diff --git a/charts/coredns/templates/deployment.yaml b/charts/coredns/templates/deployment.yaml
@@ -105,6 +105,10 @@ spec:
 {{- end }}
 {{- if .Values.extraVolumeMounts }}
 {{- toYaml .Values.extraVolumeMounts | nindent 8}}
+{{- end }}
+{{- if .Values.env }}
+        env:
+{{- toYaml .Values.env | nindent 10}}
 {{- end }}
         resources:
 {{ toYaml .Values.resources | indent 10 }}

diff --git a/charts/coredns/values.yaml b/charts/coredns/values.yaml
@@ -239,6 +239,17 @@ extraSecrets: []
 # - name: some-fancy-secret
 #   mountPath: /etc/wherever
 
+# optional array of environment variables for coredns container
+# possible usecase: provides username and password for etcd user authentications
+env: []
+# - name: WHATEVER_ENV
+#   value: whatever
+# - name: SOME_SECRET_ENV
+#   valueFrom:
+#     secretKeyRef:
+#       name: some-secret-name
+#       key: secret-key
+
 # To support legacy deployments using CoreDNS with the "k8s-app: kube-dns" label selectors.
 # See https://github.com/coredns/helm/blob/master/charts/coredns/README.md#adopting-existing-coredns-resources
 # k8sAppLabelOverride: "kube-dns"