I’d like a second opinion(s) on whether this behaviour is normal - and my understanding is wrong - or perhaps it’s a bug?
Telegraf v1.2.1 (git: release-1.2 3b6ffb344e5c03c1595d862282a6823ecb438cff) on a Raspberry Pi 3 (armhf architecture).
I’m using the following config for the CPU input plugin, because I’m not really interested in raw/jiffies values - only percentages:
[[inputs.cpu]] percpu = true totalcpu = true collect_cpu_time = false
When I run
telegraf -test, I don’t see any output at all from the plugin:
... * Plugin: inputs.cpu, Collection 1 * Plugin: inputs.disk, Collection 1 > disk,path=/,device=root,fstype=ext4,host=myhost inodes_free=423075i,inodes_used=52701i,total=7722041344i,free=4946735104i,used=2431152128i,used_percent=32.95187431783181,inodes_total=475776i 1490785312000000000 ...
… yet there is definitely stuff going into my influxdb from the plugin when I run it properly with the exact same config:
> show field keys from cpu name: cpu fieldKey fieldType -------- --------- usage_guest float usage_guest_nice float usage_idle float usage_iowait float usage_irq float usage_nice float usage_softirq float usage_steal float usage_system float usage_user float > select usage_idle from cpu where host = 'myhost' order by time desc limit 10 name: cpu time usage_idle ---- ---------- 1490786450000000000 99.89989989990681 1490786450000000000 98.97346019028585 1490786450000000000 99.70000000000255 1490786450000000000 98.70129870129765 1490786450000000000 97.58551307846399 1490786440000000000 97.59759759759973 1490786440000000000 99.49849548646664 1490786440000000000 99.89999999999782 1490786440000000000 98.89889889889315 1490786440000000000 98.97371714643343
I don’t understand why I don’t see anything during
telegraf -test, if the plugin is seemingly reporting percentage usage data just fine.
FWIW, if I set
collect_cpu_time = true, I do see output during
telegraf -test - but it’s all the jiffy/times stuff that I’m not interested in. The
usage_ fields that I’m interested in are still not shown in this case (yet are still sent to influxdb when I run the service proper).
If anyone has any clues on why the test doesn’t show the actual fields sent, I’d be very grateful!