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+# Docker mesh observability and sensitive source isolation
+
+This note describes a conservative Docker pattern for running several
+CodeProject.AI Server instances as a local mesh while keeping project data,
+module state, and observability boundaries easy to inspect.
+
+The pattern is documentation-only. It does not require a server code change, a
+new module, or a specific monitoring vendor.
+
+## Why use this pattern?
+
+CodeProject.AI Server is often used with local inputs such as camera frames,
+screenshots, documents, OCR requests, or object detection images. These inputs
+can contain private information even when they are "just images".
+
+When several CodeProject.AI servers are connected through mesh, operators need
+to know:
+
+- which containers are part of the mesh;
+- which server owns a module's persistent state;
+- whether TCP and UDP port `32168` are available;
+- which logs are safe to collect;
+- whether observability tools are only collecting metadata, not request bodies.
+
+## Recommended Docker layout
+
+Use one shared mesh network and one private network per project or workload.
+Give each server its own named persistent volume.
+
+```yaml
+name: cpai-studycase-mesh
+
+x-cpai-common: &cpai-common
+  image: codeproject/ai-server
+  restart: unless-stopped
+  networks:
+    - cpai-mesh
+  environment:
+    MeshOptions__Enable: "true"
+    MeshOptions__EnableBroadcasting: "true"
+    MeshOptions__MonitorNetwork: "true"
+    MeshOptions__AcceptForwardedRequests: "true"
+    MeshOptions__AllowRequestForwarding: "true"
+
+services:
+  cpai-project-a:
+    <<: *cpai-common
+    container_name: cpai-project-a
+    hostname: cpai-project-a
+    ports:
+      - "33168:32168/tcp"
+      - "33168:32168/udp"
+    environment:
+      MeshOptions__KnownMeshHostnames__0: "cpai-project-b"
+      MeshOptions__KnownMeshHostnames__1: "cpai-project-c"
+    labels:
+      cpai.mesh.block: "project-a"
+      cpai.mesh.role: "analysis-server"
+    networks:
+      - cpai-mesh
+      - project-a-private
+    volumes:
+      - cpai_project_a_state:/etc/codeproject/ai
+
+  cpai-project-b:
+    <<: *cpai-common
+    container_name: cpai-project-b
+    hostname: cpai-project-b
+    ports:
+      - "33268:32168/tcp"
+      - "33268:32168/udp"
+    environment:
+      MeshOptions__KnownMeshHostnames__0: "cpai-project-a"
+      MeshOptions__KnownMeshHostnames__1: "cpai-project-c"
+    labels:
+      cpai.mesh.block: "project-b"
+      cpai.mesh.role: "analysis-server"
+    networks:
+      - cpai-mesh
+      - project-b-private
+    volumes:
+      - cpai_project_b_state:/etc/codeproject/ai
+
+  cpai-project-c:
+    <<: *cpai-common
+    container_name: cpai-project-c
+    hostname: cpai-project-c
+    ports:
+      - "33368:32168/tcp"
+      - "33368:32168/udp"
+    environment:
+      MeshOptions__KnownMeshHostnames__0: "cpai-project-a"
+      MeshOptions__KnownMeshHostnames__1: "cpai-project-b"
+    labels:
+      cpai.mesh.block: "project-c"
+      cpai.mesh.role: "analysis-server"
+    networks:
+      - cpai-mesh
+      - project-c-private
+    volumes:
+      - cpai_project_c_state:/etc/codeproject/ai
+
+networks:
+  cpai-mesh:
+    driver: bridge
+  project-a-private:
+    driver: bridge
+  project-b-private:
+    driver: bridge
+  project-c-private:
+    driver: bridge
+
+volumes:
+  cpai_project_a_state:
+  cpai_project_b_state:
+  cpai_project_c_state:
+```
+
+## Mesh notes
+
+- Map both TCP and UDP for `32168` when testing mesh behavior from the host.
+- Use `MeshOptions__KnownMeshHostnames__*` in Docker if broadcast discovery is
+  unreliable.
+- Keep module state in a named volume per server so different workloads do not
+  overwrite each other.
+- Do not assume every server has the same modules, models, or hardware.
+- If a route should stay on one server, check that the corresponding module
+  route is not unintentionally mesh-enabled.
+
+## Optional observability
+
+Docker labels can make a multi-server mesh much easier to inspect. An external
+observability agent can collect container health, restart count, CPU, memory,
+and explicitly labelled logs without joining the CodeProject.AI mesh network.
+
+If you add a monitoring container, keep it on a separate observability network
+and let it read Docker metadata through Docker's supported mechanisms.
+
+```yaml
+services:
+  observability-agent:
+    image: your-observability-agent-image
+    restart: unless-stopped
+    networks:
+      - observability-private
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock:ro
+    environment:
+      LOG_COLLECTION_MODE: "explicit-labels-only"
+
+networks:
+  observability-private:
+    driver: bridge
+```
+
+The agent should not become another mesh participant. It should observe
+containers and labels, not process AI requests.
+
+## Sensitive source safety
+
+Avoid collecting or forwarding raw sensitive payloads through logs or monitoring
+tags.
+
+Do not send these values to logs or observability tools:
+
+- raw images;
+- OCR text;
+- API keys;
+- private keys;
+- `.env` values;
+- request bodies;
+- authentication headers;
+- license plates, faces, or document screenshots unless explicitly redacted.
+
+Prefer logging metadata such as:
+
+- container name;
+- route name;
+- module id;
+- request success or failure;
+- latency;
+- queue length;
+- sanitized error class.
+
+## Validation checklist
+
+Before sharing a mesh example or asking for help, capture these checks:
+
+```powershell
+docker compose config --quiet
+docker ps --format "table {{.Names}}\t{{.Status}}\t{{.Ports}}"
+docker network inspect cpai-studycase-mesh_cpai-mesh
+```
+
+Then verify the servers respond:
+
+```text
+http://localhost:33168
+http://localhost:33268
+http://localhost:33368
+```
+
+Finally, confirm that any observability container is attached only to its own
+observability network and not to the CodeProject.AI mesh network.
+