Getting the IoT Edge Module Settings - azure-iot-edge

Question

In the Azure portal, you can see the "IoT Edge Module Settings" :
How do I access this programatically from C#?
When I get the list of modules on the edge device, there doesn't appear to be an option to get the settings?

Answer 1

You use the Microsoft Azure Devices Client SDK/package and attack it this way:
var registryManager = RegistryManager.CreateFromConnectionString(connString); //the connection string for your IOT Hub
var moduleTwins= new List<Twin>();
//var query = registryManager.CreateQuery($"SELECT * FROM devices", 100);
var query = registryManager.CreateQuery("SELECT * FROM devices.modules WHERE deviceId='MyEdgeDevice'",100);
while (query.HasMoreResults) {
var page = await query.GetNextAsTwinAsync();
moduleTwins.AddRange(page);
}
// this gets rid of all that version/metadata noise in a module/device twin
foreach (var module in moduleTwins) {
module.Properties.Reported.ClearMetadata();
module.Properties.Desired.ClearMetadata();
}
Now moduleTwins is now an enumerable list of the Twin object (which is a direct representation of module/device twins). As a fun aside, in there will also be $edgeAgent and $edgeHub twins -- which contain everything - and in the list of modules for edgeAgent, you'll see more of that information for each module (the image, create options, restart policy, etc), which is found in $edgeAgent's properties.desired.modules area
"modules": {
"MyNeatModule": {
"type": "docker",
"settings": {
"image": "myAzureContainerRegistry.io/myneatmodule:amd64.debug",
"createOptions": "{}"
},
"status": "running",
"restartPolicy": "always",
"version": "1.0"
},
and everything you're looking for is in $edgeAgent's properties.reported area:
"modules": {
"SuperNeatAwesomeModule": {
"exitCode": 0,
"statusDescription": "running",
"lastStartTimeUtc": "2018-11-01T18:39:09.8814806Z",
"lastExitTimeUtc": "2018-11-01T18:05:40.8350456Z",
"restartCount": 0,
"lastRestartTimeUtc": "2018-11-01T18:05:40.8350456Z",
"runtimeStatus": "running",
"version": "1.0",
"status": "running",
"restartPolicy": "always",
"type": "docker",
"settings": {
"image": "blahblahblah.azurecr.io/superneatmodule:0.0.2-amd64.debug",
"imageHash": "sha256:ladkjsfaldkjfasdflkjasdfljasfljkasflja4",
"createOptions": "{}",
"env":{}