Node exporter: Server resource & Disk space stopped showing data
Grafana and Node Exporter Version details are as follows,
Grafana - v8.1.4 (6855cdff7c)
Node Exporter - v1.0.1.linux-amd64
Problem: On grafana for 1 Node Exporter for Prometheus Dashboard EN v20201010 dashboard suddenly not showing data for Server resource overview and Disk Space used Basic sections. Refer to the below screenshot.
It was working till last week, there is no change on Prometheus and Grafana's side. Node exporter service is running fine in all the servers and I can see the metrics from the http://server-1:9100/metrics link. this looks like Prometheus scraping data correctly.
What could be the problem? Some pointers to solve this will be helpful.
It was an issue with the system's time. Have noticed that server's time was not in sync with our domain server.Therefore fixed by running ntpdate -s domain-server, Now able to view the metrics on Grafana Dashboard.
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