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Bug 1917326 - Storage charts shows "No data" in default installation
Summary: Storage charts shows "No data" in default installation
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: grafana-pcp
Version: 8.4
Hardware: Unspecified
OS: Unspecified
medium
low
Target Milestone: rc
: 8.4
Assignee: Andreas Gerstmayr
QA Contact: Jan Kurik
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2021-01-18 10:05 UTC by Jan Kurik
Modified: 2021-09-17 12:44 UTC (History)
5 users (show)

Fixed In Version: grafana-pcp-3.0.2-1.el8
Doc Type: No Doc Update
Doc Text:
Clone Of:
Environment:
Last Closed: 2021-05-18 15:52:17 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHEA-2021:1865 0 None None None 2021-05-18 15:52:23 UTC

Description Jan Kurik 2021-01-18 10:05:03 UTC 
Description of problem:
In a default installation of PCP/Grafana/grafana-pcp storage metrics used in Vector dashboards (particulary "disk.dm.{avactive,total,total_bytes}" ) are not available. As such, charts using these metrics shows "No data" warning instead of real data.

Version-Release number of selected component (if applicable):
* grafana-7.3.6-1.el8
* pcp-5.2.3-1.el8
* grafana-pcp-3.0.1-1.el8

How reproducible:
Always

Steps to Reproduce:
1. Install Grafana, Redis, PCP and grafana-pcp plugin
# yum install -y grafana grafana-pcp pcp-zeroconf redis
2. Start all the services
# systemctl start grafana-server pmcd pmlogger pmproxy redis
3. Log into Grafana and enable the "Performance Co-Pilot" plugin
4. Configure a "PCP Vector" datasource
5. Check the following charts:
* Performance Co-Pilot/PCP Vector Checklist -> Storage Utilization
* Performance Co-Pilot/PCP Vector Checklist: Storage -> IOPS
* Performance Co-Pilot/PCP Vector Checklist: Storage -> Average block size

Actual results:
All the mentioned charts shows a warning "No data" instead of the real data.

Expected results:
Data are shown in those mentioned charts.


Additional info:
Those mentioned charts use "disk.dm.{avactive,total,total_bytes}" metrics. These metrics are not available in the default PCP configuration. I would suggest to use "disk.dev.{avactive,total,total_bytes}" instead. Those "disk.dev" metrics are available by default and IMO provides the information a user would like to see here as well.
Comment 5 errata-xmlrpc 2021-05-18 15:52:17 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 (grafana-pcp bug fix and enhancement update), 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-2021:1865
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