phosphor-virtual-sensor

phosphor-virtual-sensor reads in virtual_sensor_config.json There are two types of data in this file:

1) virtual sensor configuration information

See virtual_sensor_config.json in this repository for an example. Sensors added this way can use any expression that is accepted by exprtk.

2) information to get a virtual sensor configuraton from D-Bus

For example:

    {
    "Desc":
        {
            "Config" : "D-Bus",
            "Type" : "modifiedMedian"
        }
    }

Sensors added this way can only use a set of restricted calculations. At this stage the only type supported is modifiedMedian.

The virtual sensor configuration information needs to be added into the relevant hardware configuration file in entity-manager. This method of adding a virtual sensor allows a recipe that builds for different hardware configurations to have different virtual sensors for each configuration.

The virtual sensor configuration in entity manager follows a different format to the JSON in virtual_sensor_config.json (specified in entity-manager/schemas/VirtualSensor.json). In particular, the format for Thresholds is different. The following table shows the severity fields that correspond to a particular threshold.

Threshold	Severity
Warning	0
Critical	1
PerformanceLoss	2
SoftShutdown	3
HardShutdown	4