Device Service - Remote deployment non-secure mode

In some use cases, devices are connected to nodes where core EdgeX services are not running. In these cases the appropriate device service needs to run on the remote nodes where it can connect to the device(s) and communicate to the host node where the rest of the EdgeX services are running.

This page provides an example of remote deployment of device-usb-camera service using multiple nodes in non-secure mode. The deployment can be done by running the service natively or by running it in Docker.

Example

This example uses 2 nodes for remote deployment. One of the nodes (host) is used to run all EdgeX core services in Docker and the other node (remote) for running the device-usb-camera service either natively or in Docker. Both the nodes are on the same network. This example can be further extended to run multiple instances of device-usb-camera service in multiple nodes.

Running of the example

Set up the two nodes to be ready for remote deployment. Refer to USB Service Setup for system requirements and dependencies such as Git, Docker, Docker Compose, etc. Additionally Golang needs to be installed in the remote node if the device-usb-camera service will be built and run natively.
Next step is to install EdgeX compose in the host node which will be used to run all EdgeX core services. So clone the edgex-compose repository:
```
git clone https://github.com/edgexfoundry/edgex-compose.git
```
Checkout the required version:
```
git checkout v3.1
```
Update the docker-compose-no-secty.yml file by removing the host_ip section of all the EdgeX core services. E.g.
```
host_ip: 127.0.0.1
```
The example line provided above should be removed from the services, the host_ip will be provided while running the usb service. Non-EdgeX core services such as device-rest, device-virtual, app-rules-engine, etc. can be removed or commented out if needed.
Run EdgeX core services:
```
make run no-secty
```
Verify the services are up and running:
```
docker ps 
```
Follow the guide below to run the device-usb-camera service in Docker or natively.

DockerNative

Create docker-compose.yml file from anywhere in the remote node to run the device service in Docker. Copy the content below into the compose file and edit with approriate values:

name: edgex
services:
    device-usb-camera:
    container_name: edgex-device-usb-camera
    device_cgroup_rules:
    - c 81:* rw
    environment:
      EDGEX_SECURITY_SECRET_STORE: "false"
      EDGEX_REMOTE_SERVICE_HOSTS: "<remote-node-ip-address>,<host-node-ip-address>,<service-bind-address>"
      #E.g.EDGEX_REMOTE_SERVICE_HOSTS: "172.118.1.92,172.118.1.167,0.0.0.0"
      DRIVER_RTSPSERVERHOSTNAME: "<remote-node-ip-address>"
      DRIVER_RTSPAUTHENTICATIONSERVER: "<service-bind-address>:8000"
    hostname: edgex-device-usb-camera
    image: <published docker image of device-usb-camera>
    ports:
    - "59983:59983"
    - "8554:8554"
    read_only: true
    restart: always
    security_opt:
    - no-new-privileges:true
    user: root:root
    volumes:
    - type: bind
      source: /dev
      target: /dev
      bind:
        create_host_path: true
    - type: bind
      source: /run/udev
      target: /run/udev
      read_only: true
      bind:
        create_host_path: true

Note

If multiple instances of the service have to be run, then add EDGEX_INSTANCE_NAME environment variable above with a value of number of instances desired.

Run docker-compose.yml:
```
docker compose up -d
```

Clone the device-usb-camera service repository:

git clone https://github.com/edgexfoundry/device-usb-camera.git

Checkout the required version:
```
git checkout v3.1
```
For RTSP streaming get rtsp-simple-server binary and rtsp config yml file and copy them into the cmd directory.
Build the service from the main directory:
```
make build
```

Run the service. Use appropriate ip addresses for the rsh flag parameter. Refer to Remote Service Hosts for more info.

EDGEX_SECURITY_SECRET_STORE=false ./cmd/device-usb-camera -cp -r -rsh=<remote-node-ip-address>,<host-node-ip-address>,<service-bind-address>

Note

If multiple instances of the service have to be run, then attach -i followed by the number of instances desired. E.g:

EDGEX_SECURITY_SECRET_STORE=false ./cmd/device-usb-camera -cp -r -rsh=172.26.113.174,172.26.113.150,0.0.0.0 -i 2

Verify Service, Device(s) and next steps

Make sure the service has no errors and check whether the service is added to EdgeX i.e. to core-metadata (running in host node):

curl -s http://<host-node-ip-address>:59881/api/v3/deviceservice/name/device-usb-camera | jq .

Successful:

{
    "apiVersion" : "v3",
    "statusCode": 200,
    "service": {
        "created": 1658769423192,
        "modified": 1658872893286,
        "id": "04470def-7b5b-4362-9958-bc5ff9f54f1e",
        "name": "device-usb-camera",
        "baseAddress": "http://edgex-device-usb-camera:59983",
        "adminState": "UNLOCKED"
    }
}

Unsuccessful:

{
    "apiVersion" : "v3",
    "message": "fail to query device service by name device-usb-camera",
    "statusCode": 404
}

Verify device(s) have been successfully added:

curl -s http://<host-node-ip-address>:59881/api/v3/device/all | jq -r '"deviceName: " + '.devices[].name''

Example Output:

deviceName: NexiGo_N930AF_FHD_Webcam_NexiG-20201217010

Add credentials for RTSP streaming by referring to RTSP Stream Credentials. Make sure to replace localhost with the host node IP address.

Note

The remote node used for rtsp streaming should have FFMPEG version of 5.0 atleast.
Follow USB Service API Guide to execute APIs such as Streaming. Again make sure to replace localhost with the applicable host or remote node IP addresses.