refactor: migrate from qdrant to postgres+pgvector

manifests/deployment.yaml

@@ -23,8 +23,8 @@ spec:
             - containerPort: 8000
               name: http
           env:
-            - name: QDRANT_URL
-              value: "http://qdrant.knowledge-mcp.svc:6333"
+            - name: DATABASE_URL
+              value: "postgresql://postgres:password@postgres.knowledge-mcp.svc:5432/knowledge"
             - name: TEI_URL
               value: "http://text-embeddings.tei.svc.cluster.local:8080"
           resources:

manifests/postgres.yaml

@@ -0,0 +1,66 @@
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: postgres
+  namespace: knowledge-mcp
+  labels:
+    app: postgres
+spec:
+  serviceName: postgres
+  replicas: 1
+  selector:
+    matchLabels:
+      app: postgres
+  template:
+    metadata:
+      labels:
+        app: postgres
+    spec:
+      containers:
+        - name: postgres
+          image: ankane/pgvector:v0.5.1
+          ports:
+            - containerPort: 5432
+              name: postgres
+          env:
+            - name: POSTGRES_USER
+              value: "postgres"
+            - name: POSTGRES_PASSWORD
+              value: "password"
+            - name: POSTGRES_DB
+              value: "knowledge"
+            - name: PGDATA
+              value: "/var/lib/postgresql/data/pgdata"
+          volumeMounts:
+            - name: storage
+              mountPath: /var/lib/postgresql/data
+          resources:
+            requests:
+              cpu: "100m"
+              memory: "256Mi"
+            limits:
+              cpu: "500m"
+              memory: "512Mi"
+  volumeClaimTemplates:
+    - metadata:
+        name: storage
+      spec:
+        accessModes: [ "ReadWriteOnce" ]
+        resources:
+          requests:
+            storage: 5Gi
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: postgres
+  namespace: knowledge-mcp
+  labels:
+    app: postgres
+spec:
+  ports:
+    - port: 5432
+      targetPort: 5432
+      name: postgres
+  selector:
+    app: postgres

manifests/qdrant.yaml

@@ -1,65 +0,0 @@
-apiVersion: apps/v1
-kind: StatefulSet
-metadata:
-  name: qdrant
-  namespace: knowledge-mcp
-  labels:
-    app: qdrant
-spec:
-  serviceName: qdrant
-  replicas: 1
-  selector:
-    matchLabels:
-      app: qdrant
-  template:
-    metadata:
-      labels:
-        app: qdrant
-    spec:
-      containers:
-        - name: qdrant
-          image: qdrant/qdrant:v1.13.0
-          ports:
-            - containerPort: 6333
-              name: http
-            - containerPort: 6334
-              name: grpc
-          env:
-            - name: QDRANT__STORAGE__STORAGE_PATH
-              value: /qdrant/storage
-          volumeMounts:
-            - name: storage
-              mountPath: /qdrant/storage
-          resources:
-            requests:
-              cpu: "200m"
-              memory: "512Mi"
-            limits:
-              cpu: "1000m"
-              memory: "1Gi"
-  volumeClaimTemplates:
-    - metadata:
-        name: storage
-      spec:
-        accessModes: [ "ReadWriteOnce" ]
-        resources:
-          requests:
-            storage: 10Gi
----
-apiVersion: v1
-kind: Service
-metadata:
-  name: qdrant
-  namespace: knowledge-mcp
-  labels:
-    app: qdrant
-spec:
-  ports:
-    - port: 6333
-      targetPort: 6333
-      name: http
-    - port: 6334
-      targetPort: 6334
-      name: grpc
-  selector:
-    app: qdrant