Add namespaceDomainPattern to Helm chart (#61)

* add namespaceDomainPattern configuration

* fix docs

Author: fkywong

charts/clickhouse/README.md

@@ -155,6 +155,7 @@ EOSQL
 
 | Key | Type | Default | Description |
 |-----|------|---------|-------------|
+| namespaceDomainPattern | string |  | Custom domain pattern used for DNS names of `Service` and `Pod` resources. Typically defined by the custom cluster domain of the Kubernetes cluster. The pattern follows the `%s` C-style printf format, e.g. '%s.svc.my.test'. If not specified, the default namespace domain suffix is `.svc.cluster.local`. |
 | clickhouse.antiAffinity | bool | `false` |  |
 | clickhouse.clusterSecret | object | `{"auto":true,"enabled":false,"value":"","valueFrom":{"secretKeyRef":{"key":"secret","name":""}}}` | Cluster secret configuration for secure inter-node communication |
 | clickhouse.clusterSecret.auto | bool | `true` | Auto-generate cluster secret (recommended for security) |

charts/clickhouse/templates/chi.yaml

@@ -202,5 +202,8 @@ spec:
           {{- tpl $extraUsers . | nindent 10 }}
         {{- end }}
     {{- end }}
+  {{- if not (empty .Values.namespaceDomainPattern) }}
+  namespaceDomainPattern: {{ .Values.namespaceDomainPattern | quote }}
+  {{- end }}
 
 {{ include "validate.clickhouse.keeper" . }}

charts/clickhouse/templates/chk.yaml

@@ -129,4 +129,7 @@ spec:
                   cpu: "{{ $.Values.keeper.resources.cpuLimitsMs }}"
                   memory: "{{ $.Values.keeper.resources.memoryLimitsMiB }}"
     {{- end }}
+  {{- if not (empty .Values.namespaceDomainPattern) }}
+  namespaceDomainPattern: {{ .Values.namespaceDomainPattern | quote }}
+  {{- end }}
 {{- end }}

charts/clickhouse/values.schema.json

@@ -10,6 +10,10 @@
       "type": "string",
       "description": "Overrides the full name of the chart."
     },
+    "namespaceDomainPattern": {
+      "type": "string",
+      "description": "Custom cluster domain of Kubernetes cluster."
+    },
     "clickhouse": {
       "type": "object",
       "properties": {

charts/clickhouse/values.yaml

@@ -4,6 +4,12 @@ nameOverride: ""
 # @ignore
 fullnameOverride: ""
 
+# -- Custom domain pattern used for DNS names of `Service` and `Pod` resources.
+# Typically defined by the custom cluster domain of the Kubernetes cluster.
+# The pattern follows the `%s` C-style printf format, e.g. '%s.svc.my.test'.
+# If not specified, the default namespace domain suffix is `.svc.cluster.local`.
+namespaceDomainPattern: ""
+
 # Configure ClickHouse Installation and Pod Template
 clickhouse:
   defaultUser: