How to get the cpu temperature via this exporter?

[LizZzxx]

Hi,
How can I get the cpu temperature? Will you show me the clause on the grafana dashboard?
I have set the "node_hwmon_temp_celsius{instance="$node"}" via the grafana dashboard, but get
no data.
Best wishes!

[discordianfish]

It makes more sense to ask questions like this on the prometheus-users mailing list rather than in a GitHub issue. On the mailing list, more people are available to potentially respond to your question, and the whole community can benefit from the answers provided.

[perlun]

@LizZzxx From what I can tell, the node_hwmon_temp_celsius is not always available. I only have it on some of my nodes.

Given the info in #333, it seems like this info is deduced via the /sys/class/hwmon filesystem, and interestingly enough, this directory is empty on one of the machines that are missing. On one of them that works, there are hwmon0, hwmon1 and hwmon2 entries in there.

More info on the kernel-level hwmon sysfs interface: https://www.kernel.org/doc/Documentation/hwmon/sysfs-interface (low-level) and https://how-to.fandom.com/wiki/How_to_configure_the_Linux_kernel/drivers/hwmon (contains a list of supported chips). I guess the case could be that your machine(s) where you don't get any data doesn't have a supported hwmon driver in the kernel you're using?