Telegraf configuration to collect Pressure Stall Information (PSI)

telegraf_psi.conf.toml

# Telegraf configuration to collect Pressure Stall Information (PSI)

[[inputs.file]]
  name_override = "pressure_cpu"
  # interval = "5s"
  files = ["/proc/pressure/cpu"]
  data_format = "grok"
  grok_patterns = [
    "%{NOTSPACE:type:tag} avg10=%{NUMBER:avg10:float} avg60=%{NUMBER:avg60:float} avg300=%{NUMBER:avg300:float} total=%{NUMBER:total:int}"
  ]

[[inputs.file]]
  name_override = "pressure_io"
  # interval = "5s"
  files = ["/proc/pressure/io"]
  data_format = "grok"
  grok_patterns = [
    "%{NOTSPACE:type:tag} avg10=%{NUMBER:avg10:float} avg60=%{NUMBER:avg60:float} avg300=%{NUMBER:avg300:float} total=%{NUMBER:total:int}"
  ]

[[inputs.file]]
  name_override = "pressure_memory"
  # interval = "5s"
  files = ["/proc/pressure/memory"]
  data_format = "grok"
  grok_patterns = [
    "%{NOTSPACE:type:tag} avg10=%{NUMBER:avg10:float} avg60=%{NUMBER:avg60:float} avg300=%{NUMBER:avg300:float} total=%{NUMBER:total:int}"
  ]

On RHEL-based distros rename the file to /etc/telegraf/telegraf.d/psi.conf, test it and reload Telegraf.

On other distros ensure that /proc/pressure/* exists. If not then grep PSI /path/to/kernel/config. If enabled the default may be off. Enable it by psi=1 on Linux command line (in Grub etc.) and reboot.

The feature is present on Linux v4.20 on.