node-red-hdm-node-for-iox

This repo contains code for Cisco IOx HDM node module of Node-RED. HDM stands for Host Device Management. The HDM node is a function that outputs real-time HDM data of IR800. The output includes cpu utilization and memory consumption of the device.

Requirements

• Docker deamon up and running.
• Cisco IR800 device.
• IOxCore 1.5.0, IOxGPS 1.5.1, IOxMotion 1.5.1 and IOxHdm 1.0 services running on the device.

(If you don't want GPS service or motion service, you need to remove the dependencies in package.yaml and modify the base image in Dockerfile to node0:1.0.)

• ioxclient installed.

Installation

If you have the package.tar of this app, start from Step 3.

0.1 Build Node-RED slim Docker image

(If you already have Docker image node0:1.0, you can skip this step.)

Build Docker image node0:1.0 using the following package: https://github.com/CiscoIOx/node-red-slim-for-iox

0.2 Build gps node Docker image

(If you already have Docker image gpsnode:1.0, you can skip this step.)

Build Docker image gpsnode:1.0 using the following package: https://github.com/CiscoIOx/node-red-gps-node-for-iox

0.3 Build motion node Docker image

(If you already have Docker image motionnode:1.0, you can skip this step.)

Build Docker image motionnode:1.0 using the following package: https://github.com/CiscoIOx/node-red-motion-node-for-iox

1. Build HDM node Docker image

Go to the root of this package (same path as Dockerfile) and run: docker build -t hdmnode:1.0 .

Don't forget the . at the end. It means the current directory. This will create a Docker image hdmnode:1.0 based on the previously built image motionnode:1.0.

2. Create IOx application package

Use the following command to build the IOx application package named package.tar.

ioxclient docker package hdmnode:1.0 .

Don't forget the . at the end.

3. Deploy, activate and start the app

Deploy the application onto IR800 using Local Manager or ioxclient.

For Local Manager option:

Access device Local Manager UI using the URL path https://:8443.

Deploy the app using the name nodered and the package package.tar that you created.

Activate the app with these configurations:

• Choose iox-nat0 for network and 1880:1880 for custom port mapping.

• Choose async1 and async0 for device serial ports.

• The recommended resource profile is:

  • CPU: 200 cpu-units
  • Memory: 128 MB
  • Disk: 10 MB

  You can change the combination upon the consumption of your other apps. The memory should be no less.

Finally start the app.

For ioxclient option:

Run the following command to deploy, activate and start the app:

ioxclient app install nodered package.tar

ioxclient app activate --payload activation.json nodered

ioxclient app start nodered

The activation.json file is similar to the Sample Activation payload in GPS service introduction of IOx.

Verify the app is running

Open Node-RED interface at http://:1880.

Build a simple flow with inject, Hdm IOx connector and debug nodes. Use timestamp as the payload of inject node.

Set Repeat to none and deploy.

Click the button at timestamp node once. You'll be able to see a set of cpu utilization data and a set of memory data.

If you set Repeat to interval of every 5 seconds (the smallest period for cpu utilization) and deploy, you'll be able to see data streaming.

Set Repeat back to none and deploy to stop data streaming.

More usage

Export flows

Enter IOx appconsole by:

ioxclient app console nodered

Run the following command to push flows file and credentials file to Local Manager.

sh /usr/src/node-red/hdmapp/getflows.sh

Go to Local Manager. Click Manage of the nodered app. Click App-DataDir tab, you'll see the flows_$(hostname).json and flows_$(hostname)_cred.json files from there. Download the files to get the flows in Node-RED of this device. The credentials are encrypted.

Use the flows on other devices

Go to the Local Manager of a different device. Or you can use Fog Director for multiple devices.

Upload flows_$(hostname).json and flows_$(hostname)_cred.json under App-DataDir tab. These two files should both be uploaded or not. They work in a pair. Use path flows.json and flowscred.json respectively to ensure that they will work on different types of devices.

Start the nodered app of this second device. You should be able to see the flows with credentials already set up.

Example flows are shown below.

Set up your own credentialSecret

By default, the credentialSecret in settings.js of the nodered app is set to cisco. If you want to use your own credentailSecret, create a file called cred.json and upload with path cred.json before you start the app in IOx:

{
	"credentialSecret": "your own credentialSecret"

}

Make sure you have this cred.json file with the same credentialSecret for all your devices so that the flows_$(hostname)_cred.json file can be decrypted correctly.

Note that once you set credentialSecret you cannot change its value.

Getting help

If you have questions, concerns, bug reports, etc., please file an issue in this repository's Issue Tracker.

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Credits and references

1. https://nodered.org/docs/creating-nodes/