I am not sure what the specific PMM version when this issue emerges after I upgrade the PMM server(as I have done several upgrades)
Currently my PMM server is
2.37.1 and the
pmm-agent has the following versions:
And I found
2.28.0 works well, the system related metrics like
network can be collected and displayed on the dashboards. But versions larger than
2.28.0(inclusive) do not work. The related dashboards are empty.
Could someone advise on this? Are there any incompatible changes between PMM servers and
BTW: by restarting the
pmm-agent binary can fix this, but the issue will raise again some time in the future.
It should have something related to the tmp directory
/tmp/node_exporter as I found when the node_exporter can not collect metrics, this temporary directory does not exist. But when I restart
pmm-agent, this directory appears. And the
node_exporter command references this path: e.g.
node_exporter ... --web.config=/tmp/node_exporter/agent_id/xxxxxxxxx-f1ca-41ee-ac7b-xxxxxxxx/webConfigPlaceholder ...