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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.
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
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.