[node-red] add support for hostAliases (#150)

* Add startupProbe to Node-RED chart in order to address slow starting container being killed due to liveness probe failures.

* Bump node-red chart version

* Add hostAliases support for custom /etc/hosts entries

* Update description for hostAliases

charts/node-red/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 appVersion: 1.0.6-12
 description: Node-RED is low-code programming for event-driven applications
 name: node-red
-version: 3.2.0
+version: 3.3.0
 keywords:
   - nodered
   - node-red

charts/node-red/README.md

@@ -88,6 +88,7 @@ The following tables lists the configurable parameters of the Node-RED chart and
 | `affinity`                            | Affinity settings for pod assignment                                    | `{}`                      |
 | `podAnnotations`                      | Key-value pairs to add as pod annotations                               | `{}`                      |
 | `deploymentAnnotations`               | Key-value pairs to add as deployment annotations                        | `{}`                      |
+| `hostAliases`                         | Specify /etc/hosts entries                                              | `[]`                      |
 
 Specify each parameter using the `--set key=value[,key=value]` argument to `helm install`. For example,
 

charts/node-red/templates/deployment.yaml

@@ -100,6 +100,10 @@ spec:
         {{- else }}
           emptyDir: {}
         {{ end }}
+    {{- if .Values.hostAliases }}
+      hostAliases:
+{{ toYaml .Values.hostAliases | indent 8 }}
+    {{- end }}
     {{- with .Values.nodeSelector }}
       nodeSelector:
 {{ toYaml . | indent 8 }}

charts/node-red/values.yaml

@@ -69,6 +69,14 @@ service:
   ## Set the externalTrafficPolicy in the Service to either Cluster or Local
   # externalTrafficPolicy: Cluster
 
+hostAliases: []
+  # Use hostAliases to add custom entries to /etc/hosts - mapping IP addresses to hostnames.
+  # ref: https://kubernetes.io/docs/concepts/services-networking/add-entries-to-pod-etc-hosts-with-host-aliases/
+  # - ip: "192.168.1.100"
+  #   hostnames:
+  #   - "example.com"
+  #   - "www.example.com"
+
 ingress:
   enabled: false
   annotations: {}