export the number of CPU cores

[sitanxin]

As discuss, would you help to provide the export the number of CPU cores in metribeat?

For confirmed bugs, please report:

• Version: metricbeat 5.0.1
• Operating System: RHEL 6
• Steps to Reproduce:
  As mentioned in https://discuss.elastic.co/t/how-to-check-the-cpu-number-from-metricbeat/68803

[sitanxin]

And also, can it export the OS version or allow to run the command in the beat? like cat /etc/redhat-release ?

[martinscholz83]

Hi @ruflin, @monicasarbu. What do you think of if we add a simple helper function

func GetCores() int {
	cores := runtime.NumCPU()
	return cores
}

my problem currently is where to store this information. Into every fetch? I dont think this is a good solution. Because it is more of an onetime value. Is there a place to store such values?

[ruflin]

I suggest to put it under system.cpu.cores: 4. We do not have a special place for values that do not change that often. Such values should also compress quite well. I like the idea of a helper function.

@maddin2016 Do you plan to do a PR for it?

@sitanxin Can you open a second feature request for the os version as this is a different request?

[martinscholz83]

Ok, then i open a PR.