2021-09-11
Adding physical hardware temperatures in telegraf/influxdb/grafana
After starting the collection of a lot of the system data I wanted with telegraf/influxdb/grafana one small part was missing: the system temperature sensors. I like these, so I had a look and found the inputs.temp plugin in telegraf which is normally disabled. Enabling it on hosts that have actual hardware to measure worked ok. On the Raspberry Pi systems it gives one temperature:
> SHOW TAG VALUES ON "telegraf" WITH key="sensor" WHERE host='joy' name: temp key value --- ----- sensor cpu_thermal_inputOn the home server conway it gives quite a lot of temperatures:> SHOW TAG VALUES ON "telegraf" WITH key="sensor" WHERE host='conway' name: temp key value --- ----- sensor coretemp_core0_crit sensor coretemp_core0_critalarm sensor coretemp_core0_input sensor coretemp_core0_max sensor coretemp_core1_crit sensor coretemp_core1_critalarm sensor coretemp_core1_input sensor coretemp_core1_max sensor coretemp_core2_crit sensor coretemp_core2_critalarm sensor coretemp_core2_input sensor coretemp_core2_max sensor coretemp_core3_crit sensor coretemp_core3_critalarm sensor coretemp_core3_input sensor coretemp_core3_max sensor coretemp_core4_crit sensor coretemp_core4_critalarm sensor coretemp_core4_input sensor coretemp_core4_max sensor coretemp_core5_crit sensor coretemp_core5_critalarm sensor coretemp_core5_input sensor coretemp_core5_max sensor coretemp_physicalid0_crit sensor coretemp_physicalid0_critalarm sensor coretemp_physicalid0_input sensor coretemp_physicalid0_maxFor the dashboard showing all relevant temperatures for a system this is a bit overkill and makes the dashboard hard to read. Solution: go for all the temperature sensors that end in 'input', with the variable in the dashboard defined as 'ending in input':> SHOW TAG VALUES ON "telegraf" WITH key="sensor" WHERE host='conway' AND sensor=~/input$/ name: temp key value --- ----- sensor coretemp_core0_input sensor coretemp_core1_input sensor coretemp_core2_input sensor coretemp_core3_input sensor coretemp_core4_input sensor coretemp_core5_input sensor coretemp_physicalid0_inputSo far this works with all physical systems.
