[opentelemetry-demo] add postgresql in helm chart

charts/opentelemetry-demo/postgresql-init/01-init.sql

@@ -0,0 +1,37 @@
+-- Copyright The OpenTelemetry Authors
+-- SPDX-License-Identifier: Apache-2.0
+
+CREATE USER otelu WITH PASSWORD 'otelp';
+
+
+-- Create a table
+CREATE TABLE "order" (
+                         order_id TEXT PRIMARY KEY
+);
+
+CREATE TABLE shipping (
+                          shipping_tracking_id TEXT PRIMARY KEY,
+                          shipping_cost_currency_code TEXT NOT NULL,
+                          shipping_cost_units BIGINT NOT NULL,
+                          shipping_cost_nanos INT NOT NULL,
+                          street_address TEXT,
+                          city TEXT,
+                          state TEXT,
+                          country TEXT,
+                          zip_code TEXT,
+                          order_id TEXT NOT NULL,
+                          FOREIGN KEY (order_id) REFERENCES "order"(order_id) ON DELETE CASCADE
+);
+
+CREATE TABLE orderitem (
+                           item_cost_currency_code TEXT NOT NULL,
+                           item_cost_units BIGINT NOT NULL,
+                           item_cost_nanos INT NOT NULL,
+                           product_id TEXT NOT NULL,
+                           quantity INT NOT NULL,
+                           order_id TEXT NOT NULL,
+                           PRIMARY KEY (order_id, product_id),
+                           FOREIGN KEY (order_id) REFERENCES "order"(order_id) ON DELETE CASCADE
+);
+
+GRANT SELECT, INSERT, UPDATE ON ALL TABLES IN SCHEMA public TO otelu;

charts/opentelemetry-demo/templates/postgresql-init-config.yaml

@@ -0,0 +1,11 @@
+{{- if .Values.components.postgresql.enabled -}}
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: postgresql-init
+  namespace: {{ .Release.Namespace }}
+  labels:
+    {{- include "otel-demo.labels" . | nindent 4 }}
+data:
+  {{ (.Files.Glob "postgresql-init/*.sql").AsConfig | nindent 2 }}
+{{- end -}}

charts/opentelemetry-demo/values.schema.json

@@ -116,6 +116,9 @@
         },
         "valkey-cart": {
           "$ref": "#/definitions/Component"
+        },
+        "postgresql": {
+          "$ref": "#/definitions/Component"
         }
       },
       "title": "Components"

charts/opentelemetry-demo/values.yaml

@@ -165,6 +165,10 @@ components:
         value: kafka:9092
       - name: OTEL_EXPORTER_OTLP_ENDPOINT
         value: http://$(OTEL_COLLECTOR_NAME):4318
+      - name: DB_CONNECTION_STRING
+        value: Host=postgresql;Username=otelu;Password=otelp;Database=otel
+      - name: OTEL_DOTNET_AUTO_TRACES_ENTITYFRAMEWORKCORE_INSTRUMENTATION_ENABLED
+        value: "false"
     resources:
       limits:
         memory: 120Mi
@@ -681,6 +685,33 @@ components:
       runAsGroup: 1000
       runAsNonRoot: true
 
+  postgresql:
+    enabled: true
+    useDefault:
+      env: true
+    imageOverride:
+      repository: postgres
+      tag: "17.5"
+    replicas: 1
+    ports:
+      - name: postgresql
+        value: 5432
+    env:
+      - name: POSTGRES_USER
+        value: root
+      - name: POSTGRES_PASSWORD
+        value: otel
+      - name: POSTGRES_DB
+        value: otel
+    resources:
+      limits:
+        memory: 500Mi
+    mountedConfigMaps:
+      - name: init
+        mountPath: /docker-entrypoint-initdb.d/
+        existingConfigMap: postgresql-init
+
+
 opentelemetry-collector:
   enabled: true
   image: