add support for external clickhouse connection

Author: akash4sh

charts/client/Chart.yaml

@@ -33,6 +33,6 @@ dependencies:
     repository: https://intelops.github.io/kubviz/
   - name: grafana
     condition: grafana.enabled
-    version: 1.0.4
+    version: 1.0.5
     repository: https://kube-tarian.github.io/helmrepo-supporting-tools/
 

charts/client/templates/configmap-clickhouse-datasource.yaml

@@ -13,6 +13,23 @@ data:
         type: grafana-clickhouse-datasource
         jsonData:
           port: 9000
+ {{- if .Values.clickhouse.enabled }}
           server: {{ include "client.fullname" . }}-clickhouse
+ {{- else }}
+          server: {{ .Values.existingClickhouse.host }}
           tlsSkipVerify: true
+  {{- if not .Values.clickhouse.enabled }}
+    {{- if not .Values.existingClickhouse.secret }}
+          username: {{ .Values.existingClickhouse.username }}
+    {{- else }}
+          username: $CLICKHOUSE_USERNAME
+    {{- end }}
+        secureJsonData:
+      {{- if not .Values.existingClickhouse.secret }}
+          password: {{ .Values.existingClickhouse.password }}
+      {{- else }}
+          password: $CLICKHOUSE_PASSWORD
+      {{- end }}
+  {{- end }}
+ {{- end }}
 {{- end }}

charts/client/templates/configmap-vertamedia-datasource.yaml

@@ -11,6 +11,24 @@ data:
     datasources:
       - name: vertamedia-clickhouse-datasource
         type: vertamedia-clickhouse-datasource
+ {{- if .Values.clickhouse.enabled }}
         url: {{ include "client.fullname" . }}-clickhouse:8123
+ {{- else }}
+        url: {{ .Values.existingClickhouse.host }}:8123
         access: proxy
+  {{- if not .Values.clickhouse.enabled }}
+        basicAuth: true
+    {{- if not .Values.existingClickhouse.secret }}
+        basicAuthUser: {{ .Values.existingClickhouse.username }}
+    {{- else }}
+        basicAuthUser: $CLICKHOUSE_USERNAME
+    {{- end }}
+        secureJsonData:
+    {{- if not .Values.existingClickhouse.secret }}
+          basicAuthPassword: {{ .Values.existingClickhouse.password }}
+    {{- else }}
+          basicAuthPassword: $CLICKHOUSE_PASSWORD
+    {{- end }}
+  {{- end }}
+ {{- end }}
 {{- end }}

charts/client/templates/deployment.yaml

@@ -40,7 +40,29 @@ spec:
           - name: SCHEMA_PATH
             value : {{ .Values.migration.schema.path }}
           - name: DB_ADDRESS
+      {{- if .Values.clickhouse.enabled }}
             value: {{ include "client.fullname" . }}-clickhouse
+      {{- else }}
+            value: {{ .Values.existingClickhouse.host }}
+          - name: CLICKHOUSE_USERNAME
+            {{- if not .Values.existingClickhouse.secret }}
+            value: {{ .Values.existingClickhouse.username }}
+            {{- else }}
+            valueFrom:
+              secretKeyRef:
+                name: {{ .Values.existingClickhouse.secret.name }}
+                key: {{ .Values.existingClickhouse.secret.usernamekey }}
+            {{- end }}
+          - name: CLICKHOUSE_PASSWORD
+            {{- if not .Values.existingClickhouse.secret }}
+            value: {{ .Values.existingClickhouse.password }}
+            {{- else }}
+            valueFrom:
+              secretKeyRef:
+                name: {{ .Values.existingClickhouse.secret.name }}
+                key: {{ .Values.existingClickhouse.secret.passwordkey }}
+            {{- end }}
+      {{- end }}
           - name: DB_PORT
             value: "9000"
       containers:
@@ -74,7 +96,29 @@ spec:
           - name: NATS_ADDRESS
             value: {{ include "client.fullname" . }}-nats
           - name: DB_ADDRESS
+      {{- if .Values.clickhouse.enabled }}
             value: {{ include "client.fullname" . }}-clickhouse
+      {{- else }}
+            value: {{ .Values.existingClickhouse.host }}
+          - name: CLICKHOUSE_USERNAME
+            {{- if not .Values.existingClickhouse.secret }}
+            value: {{ .Values.existingClickhouse.username }}
+            {{- else }}
+            valueFrom:
+              secretKeyRef:
+                name: {{ .Values.existingClickhouse.secret.name }}
+                key: {{ .Values.existingClickhouse.secret.usernamekey }}
+            {{- end }}
+          - name: CLICKHOUSE_PASSWORD
+            {{- if not .Values.existingClickhouse.secret }}
+            value: {{ .Values.existingClickhouse.password }}
+            {{- else }}
+            valueFrom:
+              secretKeyRef:
+                name: {{ .Values.existingClickhouse.secret.name }}
+                key: {{ .Values.existingClickhouse.secret.passwordkey }}
+            {{- end }}
+      {{- end }}
           - name: DB_PORT
             value: "9000"
           resources:

charts/client/values.yaml

@@ -98,6 +98,17 @@ clickhouse:
   clickhouse:
     replicas: "1"
 
+existingClickhouse:
+  host: clickhouse
+  # Use username and password if you want to provide the token via Helm Values
+  username: ""
+  password: ""
+  # Use a secret reference if you want to get a username and password from a secret
+  secret: {}
+    # name: ""
+    # usernamekey: ""
+    # passwordkey: ""
+
 grafana:
   enabled: false
   plugins:
@@ -122,6 +133,14 @@ grafana:
       mountPath: /etc/secrets/postgresql
       secretName: kubviz-client-postgresql
       readOnly: true
+  clickhouse:
+    enabled: false
+    username: ""
+    password: ""
+    existingSecret: {}
+      # name: ""
+      # usernamekey: ""
+      # passwordkey: ""
 
 dashboards:
   enabled: true