Add ability to set env values for the trino-gateway

Author: arturmkr

charts/gateway/README.md

@@ -37,6 +37,14 @@ A Helm chart for Trino Gateway
     - secretRef:
         name: password-secret
   ```
+* `env` - list, default: `[]`  
+
+  Additional environment variables to mount into the init container as environment variables.
+  Example:
+  ```yaml
+   - name: NAME
+     value: "value"
+  ```
 * `config.serverConfig."node.environment"` - string, default: `"test"`
 * `config.serverConfig."http-server.http.port"` - int, default: `8080`
 * `config.dataStore.jdbcUrl` - string, default: `"jdbc:postgresql://localhost:5432/gateway"`  

charts/gateway/templates/deployment.yaml

@@ -38,6 +38,8 @@ spec:
           imagePullPolicy: {{ .Values.image.pullPolicy }}
           command:
             {{- toYaml .Values.command | nindent 12}}
+          env:
+            {{- toYaml .Values.env | nindent 12}}
           envFrom:
             {{- toYaml .Values.envFrom | nindent 12}}
           ports:

charts/gateway/values.yaml

@@ -30,6 +30,15 @@ imagePullSecrets: []
 # ```
 envFrom: []
 
+# env -- Additional environment variables to mount into the init container as environment variables.
+# @raw
+# Example:
+# ```yaml
+#  - name: NAME
+#    value: "value"
+# ```
+env: []
+
 config:
   serverConfig:
     node.environment: test

tests/gateway/test-values-with-env.yaml

@@ -11,7 +11,7 @@ config:
     http-server.http.port: 8080
   dataStore:
     # The connection details for the backend database for Trino Gateway and Trino query history
-    jdbcUrl: jdbc:postgresql://gateway-backend-db-postgresql.postgres-gateway.svc.cluster.local:5432/gateway
+    jdbcUrl: jdbc:postgresql://${ENV:PG_HOST}:5432/gateway
     user: "${ENV:PG_USER}"
     password: "${ENV:PG_PASSWORD}"
     driver: org.postgresql.Driver
@@ -28,6 +28,10 @@ envFrom:
   - secretRef:
       name: db-credentials
 
+env:
+  - name: PG_HOST
+    value: gateway-backend-db-postgresql.postgres-gateway.svc.cluster.local
+
 resources:
   limits:
     cpu: 500m