question Re: Ambari metric for CPU load for each node and overall? in Support Questions

Ambari metric for CPU load for each node and overall?

mtdeguzis — Thu, 06 Apr 2017 01:35:36 GMT

I devised a simple Python program to report CPU load average at stock intervals. However, it would be much better if I could pull this info via REST API, Grafana, or otherwise. We need to monitor our own CPU load, and not rely on external monitoring software for our organization, which is not fit for this sort of thing.

Documentation, api calls, examples?

Re: Ambari metric for CPU load for each node and overall?

namaheshwari — Thu, 06 Apr 2017 06:34:20 GMT

Below is one example for custom metrics in Ambari:

http://stackoverflow.com/questions/36268745/custom-metrics-in-ambari

Re: Ambari metric for CPU load for each node and overall?

KuldeepK — Thu, 06 Apr 2017 10:53:49 GMT

@Michael DeGuzis

Ambari metrics API docs - https://cwiki.apache.org/confluence/display/AMBARI/Ambari+Metrics+API+specification

Re: Ambari metric for CPU load for each node and overall?

mtdeguzis — Thu, 06 Apr 2017 18:58:36 GMT

This looks to be what I need, I see the CPU call there for the host, thank you 🙂

Re: Ambari metric for CPU load for each node and overall?

mtdeguzis — Thu, 06 Apr 2017 19:14:45 GMT

I tried the cpu host call, but it gives me:

curl: (3) [globbing] error: bad range specification after pos 101

And yes, I know the below is an old Unix date, which I did replace with something like

Start:1491309675 ("04/04/2017 08:41:15")

End: 1491481119 (Thu Apr 6 08:18:31 EDT 2017)

I'm not sure what the 15 signifies, or the end '&_=1430848217591'

[mtdeguzis@HOST ~]$ curl -k -H "X-Requested-By: ambari" -u <MYUSERNAME> -X GET <a href="http://<AMBARI_HOST>http://:api/v1/clusters//hosts/?fields=metrics/cpu/cpu_user[1430844610,1430848210,15],metrics/cpu/cpu_wio[1430844610,1430848210,15],metrics/cpu/cpu_nice[1430844610,1430848210,15],metrics/cpu/cpu_aidle[1430844610,1430848210,15],metrics/cpu/cpu_system[1430844610,1430848210,15],metrics/cpu/cpu_idle[1430844610,1430848210,15]&_=1430848217591</a>>:<PORT>api/v1/clusters/<CLUSTER_NAME>/hosts/<TARGET_HOST>?fields=metrics/cpu/cpu_user[1430844610,1430848210,15],metrics/cpu/cpu_wio[1430844610,1430848210,15],metrics/cpu/cpu_nice[1430844610,1430848210,15],metrics/cpu/cpu_aidle[1430844610,1430848210,15],metrics/cpu/cpu_system[1430844610,1430848210,15],metrics/cpu/cpu_idle[1430844610,1430848210,15]&_=1430848217591

curl -k -H "X-Requested-By: ambari" -u mtdeguzis -X GET "http://<AMBARI_HOST>:<PORT>/api/v1/clusters/<CLUSTER_NAME>/hosts/<TARGET_HOST>?fields=metrics/cpu/cpu_user[1491309675,1491481119,15]"

Re: Ambari metric for CPU load for each node and overall?

avijayan — Fri, 07 Apr 2017 01:59:48 GMT

@Michael DeGuzis If your cluster has Ambari Metrics Service deployed, then I would suggest using the reference - https://cwiki.apache.org/confluence/display/AMBARI/Metrics+Collector+API+Specification. It is richer and gives you more control on the data you need to fetch.