feat(k8s): add k8s cluster domain

Author: duanhongyi

charts/controller/templates/controller-deployment.yaml

@@ -76,6 +76,8 @@ spec:
             value: "{{ .Values.global.registry_secret_prefix }}"
           - name: "IMAGE_PULL_POLICY"
             value: "{{ .Values.app_pull_policy }}"
+          - name: "KUBERNETES_CLUSTER_DOMAIN"
+            value: "{{ .Values.global.cluster_domain }}"
 {{- if (.Values.app_storage_class) }}
           - name: "DRYCC_APP_STORAGE_CLASS"
             value: "{{ .Values.app_storage_class }}"
@@ -133,7 +135,7 @@ spec:
               fieldRef:
                 fieldPath: metadata.namespace
           - name: DRYCC_NSQD_ADDRS
-            value: "{{range $i := until $nsqdNodeCount}}drycc-nsqd-{{$i}}.drycc-nsqd.{{ $.Release.Namespace }}.svc.cluster.local:{{$.Values.nsqd.tcp_port}}{{if lt (add 1 $i) $nsqdNodeCount}},{{end}}{{end}}"
+            value: "{{range $i := until $nsqdNodeCount}}drycc-nsqd-{{$i}}.drycc-nsqd.{{$.Release.Namespace}}.svc.{{$.Values.global.cluster_domain}}:{{$.Values.nsqd.tcp_port}}{{if lt (add 1 $i) $nsqdNodeCount}},{{end}}{{end}}"
           {{- range $key, $value := .Values.environment }}
           - name: {{ $key }}
             value: {{ $value | quote }}

charts/controller/values.yaml

@@ -64,6 +64,11 @@ global:
   use_rbac: false
   # Please check `kubernetes.io/ingress.class`
   ingress_class: ""
+  # A domain name consists of one or more parts.
+  # Periods (.) are used to separate these parts.
+  # Each part must be 1 to 63 characters in length and can contain lowercase letters, digits, and hyphens (-).
+  # It must start and end with a lowercase letter or digit.
+  cluster_domain: "cluster.local"
   # The public resolvable hostname to build your cluster with.
   #
   # This will be the hostname that is used to build endpoints such as "drycc.$HOSTNAME"

rootfs/api/settings/production.py

@@ -250,7 +250,12 @@
 SCHEDULER_URL = "https://{}:{}".format(
     # accessing the k8s api server by IP address rather than hostname avoids
     # intermittent DNS errors
-    os.environ.get('KUBERNETES_SERVICE_HOST', 'kubernetes.default.svc.cluster.local'),
+    os.environ.get(
+        'KUBERNETES_SERVICE_HOST',
+        'kubernetes.default.svc.{}'.format(os.environ.get(
+            "KUBERNETES_CLUSTER_DOMAIN", "cluster.local"
+        ))
+    ),
     os.environ.get('KUBERNETES_SERVICE_PORT', '443')
 )