Bug 1784862

Summary:	Wildcard legends in Grafana-PCP
Product:	Red Hat Enterprise Linux 8	Reporter:	Lukas Zapletal <lzap>
Component:	grafana-pcp	Assignee:	Andreas Gerstmayr <agerstmayr>
Status:	CLOSED ERRATA	QA Contact:	Jan Kurik <jkurik>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	8.2	CC:	agerstmayr, jkurik, mgoodwin, mnewsome, nathans, patrickm
Target Milestone:	rc	Keywords:	Bugfix, Triaged
Target Release:	8.0
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	No Doc Update
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-04-28 15:58:11 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Lukas Zapletal 2019-12-18 14:19:30 UTC

Description of problem:

I am trying PCP 5.0.2 with the all-new Grafana and so far so good, but I have a problem with displaying multiple metrics on a single graph. Say I want to display disk.dev.* all on one graph. If I put this to the query (with the wildcard) it wimply renders two dozens of legends with "vda". Not very useful, when I try to put $metric to the label field I expect the legend to show full metric name, however it simply displays "disk.dev.*" for all legends. There is also quite useful variable $metric0 which is exactly what I want (to display the last element of the metric name), however it displays "*" for all legends again.

I've managed to display "Value" for all legends too, however I am unable to reproduce this with standard metrics only with my own data. Here is the archive, the metric tree in question is:

mmv.fm_rails_activerecord_instances.*

These are counters of some object instances, for some reason PCP instance is not used (this has been fixed with statsd PMDA in PCP5 however I still need to be able to send from old version).

https://lzap.fedorapeople.org/temp/mmv-grafana-labels.tar.xz

Version: 5.0.2-1

Comment 1 Andreas Gerstmayr 2019-12-18 14:37:57 UTC

Bug is confirmed and fixed in upstream (1.x branch):

commit c178548bb96d823444e3cfcc53d69477e80a2471
Author: Andreas Gerstmayr <agerstmayr>
Date:   Wed Dec 18 12:29:09 2019 +0100

    redis: support wildcards in metric names

Comment 2 Andreas Gerstmayr 2020-01-07 14:12:39 UTC

Bug is fixed in grafana-pcp 1.0.5-2

Comment 4 Jan Kurik 2020-01-15 10:34:38 UTC

Legend "$metric" and "$metric0" works as expected when using grafana-pcp 1.0.5-2 build.

Comment 6 errata-xmlrpc 2020-04-28 15:58:11 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHEA-2020:1681