Can I kick off discovery from script with device name?

Rick54 · ‎04-09-2019

Hello,

Is there any way to kick off discovery from JavaScript using just device name.

I am working on vCenter MID extension. I get the device name in the parm fields in the event from vCenter, from there I capture the name and populate it in the CMDB. Once addition is done I wanted to kick off discovery update the CI. I know how to run the discovery from script but not sure about running it without any IP address. Please suggest me any ideas here. Thanks!

tim_broberg · ‎04-09-2019

So far so good. You have a probe object. Now you need to stick an address on it and mail it.

I think the values allows you to pass in some parameters, but I honestly don't know. Personally, i would just omit that argument, but if you want to try to work it out by example, by all means, go for it.

So, now you have a probe. Assuming you don't need to fool with other probe parameters, you can just set the ip or hostname in the source field and create the probe.

Here's an example i tried out with a simple Linux probe:

var ipOrHostname = 'timserve';
var mid = 'tims_mid';

var probe = SncProbe.get("Linux - CPU");
probe.setSource(ipOrHostname);
probe.create(mid);

I see an output and then input appear on the ecc_queue as a result of running this script.

If you don't just know which mid to use, that's a little more work.

var source = 'timserve';

var probe = SncProbe.get("Linux - CPU");
probe.setSource(source);
probe.createForAutoSelectMidServer('Discovery', [{'capability': 'ssh'}], null);

The arguments for createForAutoSelectMidServer() are frankly a little baffling. It's SncProbe.createForAutoSelectMidServer(String application, Object[] capabilities, String sensorECCID).

Application is a mid server application such as "Discovery" or "Orchestration".

Capabilities is an array of objects with a capability and a value, but I always wind up ignoring the value. If you poke at your mid server capabilities, you should be able to find what you need. I needed "ssh" for my probe.

sensorECCID is the sysid of the ecc_queue input we're responding to. Ignore it unless you are responding to another probe, which you're not.

Hope it helps,
- Tim.

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sachin_namjoshi · ‎04-09-2019

Yes, you can use startDiscovery API functions to start discovery using device name and schedule.

Please check below

https://developer.servicenow.com/app.do#!/api_doc?v=jakarta&id=r_SDY-getCancelScript

Regards,

Sachin

Rick54 · ‎04-09-2019

Thanks for the reply Sachin. I think I can only run using IP Address. I need it with a device name.

Larry Youngqui2 · ‎04-09-2019

Assuming that the IP Address is not stored and available from the CI record, you would need to execute a remote shell or powershell command and perform an nslookup. From the returned result string, parse out the IP address and then use it to call the Discovery API.

Rick54 · ‎04-09-2019

Thanks fro the reply Larry. This is going to be performed from a Script Action. Can you give me an idea or a source to build this from Script Action? Thanks again.