"Fatal error generating Agent's connection string"

IoT Edge edgeAgent fails with “Fatal error generating Agent’s connection string” with this script https://docs.microsoft.com/en-us/azure/iot-edge/quickstart

System is Windows 10 Enterprise 1703 laptop

`` 
PS C:\WINDOWS\system32> Get-Service iotedge
Status   Name               DisplayName
------   ----               -----------
Running  iotedge            iotedge
PS C:\WINDOWS\system32> iotedge list
NAME             STATUS           DESCRIPTION      CONFIG
PS C:\WINDOWS\system32> iotedge list
NAME             STATUS           DESCRIPTION      CONFIG
PS C:\WINDOWS\system32> iotedge list
NAME             STATUS           DESCRIPTION      CONFIG
edgeAgent        running          Up 0 seconds     mcr.microsoft.com/azureiotedge-agent:1.0
PS C:\WINDOWS\system32> iotedge list
NAME             STATUS           DESCRIPTION      CONFIG
edgeAgent        running          Up 4 seconds     mcr.microsoft.com/azureiotedge-agent:1.0
PS C:\WINDOWS\system32> iotedge list
NAME             STATUS           DESCRIPTION      CONFIG
edgeAgent        running          Up 5 seconds     mcr.microsoft.com/azureiotedge-agent:1.0
PS C:\WINDOWS\system32> docker logs -f edgeAgent
[2018-07-03 10:17:11 : Starting Edge Agent
[07/03/2018 10:17:11.824 AM] Edge Agent Main()
2018-07-03 10:17:12.103 +00:00 [INF] - Starting module management agent.
2018-07-03 10:17:12.290 +00:00 [INF] - Version - 1.0.0.14487025             
(52ef77db24126bf473265fc09c53d35290a2dd6b)
2018-07-03 10:17:12.291 +00:00 [INF] -
    █████╗ ███████╗██╗   ██╗██████╗ ███████╗
   ██╔══██╗╚══███╔╝██║   ██║██╔══██╗██╔════╝
   ███████║  ███╔╝ ██║   ██║██████╔╝█████╗
   ██╔══██║ ███╔╝  ██║   ██║██╔══██╗██╔══╝
   ██║  ██║███████╗╚██████╔╝██║  ██║███████╗
   ╚═╝  ╚═╝╚══════╝ ╚═════╝ ╚═╝  ╚═╝╚══════╝

 ██╗ ██████╗ ████████╗    ███████╗██████╗  ██████╗ ███████╗
 ██║██╔═══██╗╚══██╔══╝    ██╔════╝██╔══██╗██╔════╝ ██╔════╝    
 ██║██║   ██║   ██║       █████╗  ██║  ██║██║  ███╗█████╗
 ██║██║   ██║   ██║       ██╔══╝  ██║  ██║██║   ██║██╔══╝
 ██║╚██████╔╝   ██║       ███████╗██████╔╝╚██████╔╝███████╗
 ╚═╝ ╚═════╝    ╚═╝       ╚══════╝╚═════╝  ╚═════╝ ╚══════╝

2018-07-03 10:17:12.447 +00:00 [INF] - Edge agent attempting to connect to IoT Hub via AMQP...
2018-07-03 10:17:13.119 +00:00 [INF] - Created persistent store at /tmp/edgeAgent
2018-07-03 10:17:18.442 +00:00 [WRN] - Empty edge agent config was received. Attempting to read     config from backup file
(backup.json) instead
2018-07-03 10:17:18.451 +00:00 [INF] - Edge agent config backup file does not exist - backup.json
2018-07-03 10:17:28.476 +00:00 [WRN] - Empty edge agent config was received. Attempting to read config from backup file
(backup.json) instead
2018-07-03 10:17:28.476 +00:00 [INF] - Edge agent config backup file does not exist - backup.json
2018-07-03 10:17:38.482 +00:00 [WRN] - Empty edge agent config was received. Attempting to read config from backup file
(backup.json) instead
2018-07-03 10:17:38.483 +00:00 [INF] - Edge agent config backup file does not exist - backup.json
2018-07-03 10:17:42.510 +00:00 [INF] - Edge agent attempting to connect to IoT Hub via AMQP over WebSocket...
2018-07-03 10:17:43.523 +00:00 [INF] - Edge agent connected to IoT Hub via AMQP over WebSocket.
2018-07-03 10:17:44.439 +00:00 [INF] - Plan execution started for deployment 17
2018-07-03 10:17:44.466 +00:00 [INF] - Executing command: "Update and start module edgeAgent"
PS C:\WINDOWS\system32> docker logs -f edgeAgent
Error: No such container: edgeAgent
PS C:\WINDOWS\system32> docker logs -f edgeAgent
2018-07-03 10:18:02.761 +00:00 [INF] - Starting module management agent.
2018-07-03 10:18:02.938 +00:00 [INF] - Version - 1.0.0-preview022.11567621     (12a8e1bb63e619b17ca685efd470ad3f412034f4)
2018-07-03 10:18:02.939 +00:00 [INF] -
    █████╗ ███████╗██╗   ██╗██████╗ ███████╗
   ██╔══██╗╚══███╔╝██║   ██║██╔══██╗██╔════╝
   ███████║  ███╔╝ ██║   ██║██████╔╝█████╗
   ██╔══██║ ███╔╝  ██║   ██║██╔══██╗██╔══╝
   ██║  ██║███████╗╚██████╔╝██║  ██║███████╗
   ╚═╝  ╚═╝╚══════╝ ╚═════╝ ╚═╝  ╚═╝╚══════╝

 ██╗ ██████╗ ████████╗    ███████╗██████╗  ██████╗ ███████╗
 ██║██╔═══██╗╚══██╔══╝    ██╔════╝██╔══██╗██╔════╝ ██╔════╝
 ██║██║   ██║   ██║       █████╗  ██║  ██║██║  ███╗█████╗
 ██║██║   ██║   ██║       ██╔══╝  ██║  ██║██║   ██║██╔══╝
 ██║╚██████╔╝   ██║       ███████╗██████╔╝╚██████╔╝███████╗
 ╚═╝ ╚═════╝    ╚═╝       ╚══════╝╚═════╝  ╚═════╝ ╚══════╝

2018-07-03 10:18:02.958 +00:00 [FTL] - Fatal error generating Agent's connection string.
System.FormatException: Malformed Token
   at Microsoft.Azure.Devices.Client.Extensions.CommonExtensionMethods.ToDictionary(String     valuePairString, Char kvpDelimiter, Char kvpSeparator)
at Microsoft.Azure.Devices.Client.IotHubConnectionStringBuilder.Parse(String iotHubConnectionString)
at     Microsoft.Azure.Devices.Client.IotHubConnectionStringBuilder.CreateWithIAuthenticationOverride(String iotHubConnectionString, IAuthenticationMethod authenticationMethod)
at Microsoft.Azure.Devices.Edge.Agent.Service.Program.<MainAsync>d__4.MoveNext()
PS C:\WINDOWS\system32>
``

[druttka]

Good catch, thanks! The deployment was using the old microsoft/azureiotedge-agent:1.0-preview image.

I was using Set Modules from within the Portal, fresh hub, fresh device, and a fresh install of the runtime, so I overlooked what I expected to be correct defaults. I’m not 100% sure how the preview tag got in there, but things are working once I ensure we use the mcr.microsoft.com/azureiotedge-agent:1.0 image.

FWIW, my best guess at how I got the -preview tag is that I had an old entry from a bug bash in my hosts file, so might have hit a bad endpoint while using Set Modules.

[myagley]

Closing this issue as it looks to have been resolved. I’ve linked the blog article describing the migration procedure to the GA for future reference: https://azure.microsoft.com/en-us/blog/iot-edge-ga-migration/