First deployment.

stacks/core/postgres/stack.yml

@@ -0,0 +1,27 @@
+services:
+  postgres:
+    image: postgres:17-alpine
+    secrets:
+    - postgres-master
+    networks:
+    - homelab
+    environment:
+    - POSTGRES_USER=admin
+    - POSTGRES_PASSWORD_FILE=/run/secrets/postgres-master
+    - PGDATA=/var/lib/postgresql/data
+    volumes:
+    - /mnt/swarm-data/postgres:/var/lib/postgresql/data
+    ports:
+    - 5432:5432
+    deploy:
+      replicas: 1
+      placement:
+        constraints:
+        - node.hostname == p0
+
+networks:
+  homelab:
+    external: true
+secrets:
+  postgres-master:
+    external: true