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v2.2-0: Feature release
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@f18m f18m released this 18 Jan 01:27
· 24 commits to master since this release
2.2.0
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Learn about vigilant mode.

Fix crash in case cmonitor_collector cannot find the cgroup to monitor
cmonitor_collector crashing on Ubuntu 20.04 (#31)
cmonitor_collector developments to improve the Docker-monitoring-Docker scenario
Improve cmonitor_chart utility (#34)

in cmonitor_chart output HTML:

  • split in 2 categories cgroup buttons/charts related to global-cgroup stats and per-process stats
  • improve cpu-by-process/thread chart by stacking the various CPU and MEMORY contributions and highlight when the CPU throttling kicks in by drwaing a thick RED line on the 2nd Y axis
  • even when cgroup_threads are collected, create a "memory by process" chart and not a "memory by thread" chart
  • improve rendering of TOOLTIPs and VAXIS ticks by adding Javascript code for pretty printing
  • add stress-cpu and stress-mem docker examples

in cmonitor_collector:

  • fix bug in collector not considering new-born PIDs for top-scorer computation
  • make failcnt a differential value like cpu throttling and rename to "events.failcnt" for coherency with cgroups v2 stats
  • Large Cgroup configuration code refactor: revise completely and deep-test all supported kernels/cgroup-provider combination
  • Add unit tests for SYSTEMD-created cgroups (previously we had only for DOCKER-created cgroups)
  • Fix search for cmonitor_collector PID in cgroups v2 (when running outside a container)
  • Log errors on stdout when running in debug mode
  • Change behavior: if some cgroup v2 limit cannot be detected, keep monitoring instead of giving up; this makes collector logic much more robust against unknown environments (combination of linux kernel, distribution, systemd/docker/etc)
  • Fix bug where last baremetal cpu was not monitored
  • in README: add info on how to build from sources

cmonitor tools:

  • Fix formatting of Python scripts by increasing length used by black
  • in cmonitor_chart: fix reading of timestamps when --utc is not provided
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