Azure Connector configuration

Customize the remote connectivity.

Properties

To control all aspects of the azure connector behavior.

Property	Type	Default	Description
tenantId	string	defaultTenant	Tenant unique identifier that the device belongs to
connectionString	string		The connection string for connectivity to Azure IoT Hub, the format is: `"HostName=newHostName.azure-devices.net;DeviceId=deviceId;SharedAccessKey=accessKey"`
sasTokenValidity	string	1h	The validity period for the generated SAS token for device authentication. Positive integer number followed by a unit suffix, such as ‘300m’, ‘1h’, etc., time units are: m, h, d
idScope	string		ID scope for Azure Device Provisioning service
Remote connectivity - TLS
alpn	string[]		TLS application layer protocol negotiation options space separated for cloud access
caCert	string	iothub.crt	PEM encoded CA certificates file
cert	string		PEM encoded certificate file to authenticate to the MQTT endpoint
key	string		PEM encoded unencrypted private key file to authenticate to the MQTT endpoint
Remote connectivity - TLS over TPM
tpmDevice	string		Path to the device file or the unix socket to access the TPM 2.0
tpmHandle	int		TPM 2.0 storage root key handle, the type is unsigned 64-bit integer
tpmKeyPub	string		File path to the public part of the TPM 2.0 key
tpmKey	string		File path to the private part of the TPM 2.0 key
Local connectivity
localAddress	string	tcp://localhost:1883	Address of the MQTT server/broker that the azure connector will connect for the local communication, the format is: `scheme://host:port`
localUsername	string		Username that is a part of the credentials
localPassword	string		Password that is a part of the credentials
Local connectivity - TLS
localCACert	string		PEM encoded CA certificates file
localCert	string		PEM encoded certificate file to authenticate to the MQTT server/broker
localKey	string		PEM encoded unencrypted private key file to authenticate to the MQTT server/broker
Logging
logFile	string	logs/azure-connector.log	Path to the file where log messages are written
logLevel	string	INFO	All log messages at this or a higher level will be logged, the log levels in descending order are: ERROR, WARN, INFO, DEBUG and TRACE
logFileCount	int	5	Log file maximum rotations count
logFileMaxAge	int	28	Log file rotations maximum age in days, use 0 to not remove old log files
logFileSize	int	2	Log file size in MB before it gets rotated

Example

The minimal required configuration to connect.

{
    "connectionString": "HostName=hostName.azure-devices.net;DeviceId=deviceId;SharedAccessKey=cGFzc3AvcKQ=",
    "caCert": "/etc/azure-connector/iothub.crt",
    "logFile": "/var/log/azure-connector/azure-connector.log"
}

Template

The configuration can be further adjusted according to the use case. The following template illustrates all possible properties with their default values.

Be aware that some combinations may be incompatible

{
    "tenantId": "defaultTenant",
    "connectionString": "",
    "sasTokenValidity": "1h",
    "idScope": "",
    "alpn" : [],
    "caCert": "iothub.crt",
    "cert": "",
    "key": "",
    "tpmDevice": "",
    "tpmHandle": 0,
    "tpmKeyPub": "",
    "tpmKey": "",
    "localAddress": "tcp://localhost:1883",
    "localUsername": "",
    "localPassword": "",
    "localCACert": "",
    "localCert": "",
    "localKey": "",
    "logFile": "logs/azure-connector.log",
    "logLevel": "INFO",
    "logFileCount": 5,
    "logFileMaxAge": 28,
    "logFileSize": 2
}

Last modified June 17, 2024