topic Re: Adding hostname in the metric event description in Alerting

Adding hostname in the metric event description

SrikanthSamraj — Wed, 27 Mar 2024 08:23:19 GMT

Hi,

I'm trying to monitor CPU usage of a specific process group using metric event (Query definition type as metric key). What can be done to avail host name in the event template description? At present, problem generated shows "Process group" and "severity" but expecting affected host to be part of this description.

Looking for thoughts since I presume it's not a straightforward one!

Rgds.

Re: Adding hostname in the metric event description

PacoPorro — Wed, 27 Mar 2024 09:08:48 GMT

Please try using this metric selector:

builtin:tech.generic.cpu.usage:filter(in("dt.entity.process_group_instance", entitySelector("type(~"PROCESS_GROUP_INSTANCE~"),entityName.equals(~"YOUR PROCESS~")"))):splitBy("dt.entity.process_group_instance"):parents

Re: Adding hostname in the metric event description

SrikanthSamraj — Wed, 27 Mar 2024 09:18:27 GMT

Thanks @PacoPorro. If I understand correctly, we can't have "hostname" in the event template description if I intend to use metric key rather than metric selector?

Re: Adding hostname in the metric event description

PacoPorro — Wed, 27 Mar 2024 09:31:09 GMT

As you can see in the metric explorer the only available dimension is the process group instance, so you want be able to get it directly.

You can also create a tag "host" with the host detected name, and add the "tags placeholder" to the event.

Re: Adding hostname in the metric event description

SrikanthSamraj — Wed, 27 Mar 2024 09:36:41 GMT

I'm using below one now,

builtin:tech.generic.cpu.usage:filter(and(or(in("dt.entity.process_group_instance",entitySelector("type(process_group_instance),fromRelationship.isInstanceOf(type(PROCESS_GROUP),tag(~"XXXXXX~"))"))),or(in("dt.entity.process_group_instance",entitySelector("type(process_group_instance),fromRelationship.isProcessOf(type(HOST),osType(~"LINUX~"))"))))):splitBy("dt.entity.process_group_instance"):parents

Like you said it does give hostname, process group and cpu usage in %. Only thing I worry is, dimension limits. We have a large server set ~10K Linux hosts.

Re: Adding hostname in the metric event description

SrikanthSamraj — Wed, 27 Mar 2024 09:41:52 GMT

This time with usage of above metric explorer, I can get options to populate hostname in the event template description, but as expected trouble is with dimension limits.