Add support for hostAliases

Signed-off-by: Joel Damata <damatj@pointclickcare.com>
backstage · Nov 11, 2024 · 8053d5e · 8053d5e
1 parent 560f425
commit 8053d5e
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diff --git a/charts/backstage/README.md b/charts/backstage/README.md
@@ -128,6 +128,7 @@ Kubernetes: `>= 1.19.0-0`
 | backstage.extraVolumeMounts | Backstage container additional volume mounts | list | `[]` |
 | backstage.extraVolumes | Backstage container additional volumes | list | `[]` |
 | backstage.image.digest | Backstage image digest (digest takes precedence over image tag) | string | `""` |
+| backstage.hostAliases | Host Aliases for the pod <br /> Ref: https://kubernetes.io/docs/concepts/services-networking/add-entries-to-pod-etc-hosts-with-host-aliases/ | list | `[]` |
 | backstage.image.pullPolicy | Specify a imagePullPolicy. Defaults to 'Always' if image tag is 'latest', else set to 'IfNotPresent' <br /> Ref: https://kubernetes.io/docs/concepts/containers/images/#image-pull-policy | string | `"Always"` |
 | backstage.image.pullSecrets | Optionally specify an array of imagePullSecrets.  Secrets must be manually created in the namespace. <br /> Ref: https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/ <br /> E.g: `pullSecrets: [myRegistryKeySecretName]` | list | `[]` |
 | backstage.image.registry | Backstage image registry | string | `"ghcr.io"` |

diff --git a/charts/backstage/templates/backstage-deployment.yaml b/charts/backstage/templates/backstage-deployment.yaml
@@ -59,6 +59,10 @@ spec:
       tolerations:
         {{- include "common.tplvalues.render" ( dict "value" .Values.backstage.tolerations "context" $) | nindent 8 }}
       {{- end }}
+      {{- if .Values.backstage.hostAliases }}
+      hostAliases:
+        {{- include "common.tplvalues.render" ( dict "value" .Values.backstage.hostAliases "context" $) | nindent 8 }}
+      {{- end }}
       volumes:
         {{- if (or .Values.backstage.extraAppConfig (and .Values.backstage.extraVolumeMounts .Values.backstage.extraVolumes)) }}
         {{- range .Values.backstage.extraAppConfig }}

diff --git a/charts/backstage/values.schema.json b/charts/backstage/values.schema.json
@@ -3978,6 +3978,33 @@
                     "title": "Backstage container additional volumes",
                     "type": "array"
                 },
+                "hostAliases": {
+                    "default": [],
+                    "description": "Ref: https://kubernetes.io/docs/tasks/network/customize-hosts-file-for-pods/#adding-additional-entries-with-hostaliases",
+                    "items": {
+                        "description": "HostAlias holds the mapping between IP and hostnames that will be injected as an entry in the pod's hosts file.",
+                        "properties": {
+                            "hostnames": {
+                                "description": "Hostnames for the above IP address.",
+                                "items": {
+                                    "type": "string"
+                                },
+                                "type": "array",
+                                "x-kubernetes-list-type": "atomic"
+                            },
+                            "ip": {
+                                "description": "IP address of the host file entry.",
+                                "type": "string"
+                            }
+                        },
+                        "required": [
+                            "ip"
+                        ],
+                        "type": "object"
+                    },
+                    "title": "Adding entries to a Pod's /etc/hosts file provides Pod-level override of hostname resolution when DNS and other options are not applicable",
+                    "type": "array"
+                },
                 "image": {
                     "additionalProperties": false,
                     "properties": {

diff --git a/charts/backstage/values.schema.tmpl.json b/charts/backstage/values.schema.tmpl.json
@@ -574,6 +574,15 @@
                     },
                     "default": []
                 },
+                "hostAliases": {
+                    "title": "Adding entries to a Pod's /etc/hosts file provides Pod-level override of hostname resolution when DNS and other options are not applicable",
+                    "description": "Ref: https://kubernetes.io/docs/tasks/network/customize-hosts-file-for-pods/#adding-additional-entries-with-hostaliases",
+                    "type": "array",
+                    "items": {
+                        "$ref": "https://raw.githubusercontent.com/yannh/kubernetes-json-schema/master/master/_definitions.json#/definitions/io.k8s.api.core.v1.HostAlias"
+                    },
+                    "default": []
+                },
                 "podAnnotations": {
                     "title": "Annotations to add to the backend deployment pods",
                     "type": "object",

diff --git a/charts/backstage/values.yaml b/charts/backstage/values.yaml
@@ -278,6 +278,10 @@ backstage:
   #    value: "value"
   #    effect: "NoSchedule|PreferNoSchedule|NoExecute"
 
+  # -- Host Aliases for the pod
+  # <br /> Ref: https://kubernetes.io/docs/concepts/services-networking/add-entries-to-pod-etc-hosts-with-host-aliases/
+  hostAliases: []
+
   # -- Annotations to add to the backend deployment pods
   podAnnotations: {}