telegraf.service: Got notification message from PID XXX, but reception only permitted for main PID YYY

[shrx]

Relevant telegraf.conf

[agent]
  interval = "1m"
  round_interval = true
  metric_batch_size = 1000
  metric_buffer_limit = 10000
  collection_jitter = "5s"
  flush_interval = "10s"
  flush_jitter = "5s"
  precision = ""
  hostname = ""
  omit_hostname = true
[[outputs.influxdb]]
  urls = ["http://127.0.0.1:8086"]
  database = "home"
  skip_database_creation = true
  username = "telegraf"
  password = "XXXXXX"
 [[inputs.exec]]
   commands = [
     "/home/pi/bin/script1",
     "/home/pi/bin/script2"
   ]
   timeout = "6s"
   data_format = "influx"

Logs from Telegraf

Dec 23 00:59:04 raspberrypi systemd[1]: telegraf.service: Got notification message from PID 3572831, but reception only permitted for main PID 3571618
Dec 23 00:59:08 raspberrypi systemd[1]: telegraf.service: Got notification message from PID 3572834, but reception only permitted for main PID 3571618
Dec 23 01:00:04 raspberrypi systemd[1]: telegraf.service: Got notification message from PID 3572948, but reception only permitted for main PID 3571618
Dec 23 01:00:08 raspberrypi systemd[1]: telegraf.service: Got notification message from PID 3572951, but reception only permitted for main PID 3571618
Dec 23 01:01:01 raspberrypi systemd[1]: telegraf.service: Got notification message from PID 3573066, but reception only permitted for main PID 3571618
Dec 23 01:01:05 raspberrypi systemd[1]: telegraf.service: Got notification message from PID 3573069, but reception only permitted for main PID 3571618

System info

Telegraf 1.29.1-1

Docker

No response

Steps to reproduce

script1 and script2 are producing the following output, respectively:

device1 power_on=0i,set_temperature=25.0,current_temperature=22.0
device2 detected=1i,rssi=-62i

Expected behavior

No systemd warnings.

Actual behavior

There are systemd warnings for each script execution.

Additional info

No response

[shrx]

A solution appears to be adding NotifyAccess=all under the [Service] section in /lib/systemd/system/telegraf.service, as per https://groups.google.com/g/linux.debian.bugs.dist/c/XM9-48USWVQ?pli=1

[powersj]

@shrx,

Thanks for looking into this. I think we should carry that by default and not require users to include it, but I am not 100% certain of the implications still. I have put up #14517 which would make the change.

[powersj]

@shrx - can I get you to try the artifacts in #14517 please and confirm it suppresses the messages?

[shrx]

@shrx - can I get you to try the artifacts in #14517 please and confirm it suppresses the messages?

Sure, I'll be glad to test the fix.

[shrx]

@powersj looks good to me, thanks!