sosreport is taking a long time on a system which has numerous namespaces or files.

Solution Verified - Updated -

Issue

  • Generating a sosreport on our systems takes on average between 5-8 hours. However, this should not take more than 15 minutes. When deactivating the cgroups plugin, it takes just 6 minutes to generate a normal sosreport.
  • When running sosreport with the cgroup plugin enabled on OpenShift Node, we can see that cgroup plugin takes a lot of time to complete.
[plugin: cgroups] recursively adding 'cgroup.event_control' from '/ sys / fs / cgroup / systemd'
[plugin: cgroups] copying path '/sys/fs/cgroup/systemd/cgroup.event_control' to archive: '/ sys / fs / cgroup / systemd / cgroup.event_control'
[plugin: cgroups] recursively adding 'notify_on_release' from '/ sys / fs / cgroup / systemd'
[plugin: cgroups] copying path '/ sys / fs / cgroup / systemd / notify_on_release' to archive: '/ sys / fs / cgroup / systemd / notify_on_release'
[plugin: cgroups] recursively adding 'cgroup.procs' from '/ sys / fs / cgroup / systemd'
[plugin: cgroups] copying path '/sys/fs/cgroup/systemd/cgroup.procs' to archive: '/ sys / fs / cgroup / systemd / cgroup.procs'
[plugin: cgroups] recursively adding 'tasks' from '/ sys / fs / cgroup / systemd'
[plugin: cgroups] copying path '/ sys / fs / cgroup / systemd / tasks' to archive: '/ sys / fs / cgroup / systemd / tasks'
[plugin: cgroups] unpacked command tuple: ('systemd-cgls', 'None', 'None', 300, 'True', 'True', 'None', 'None', 'False 25')
[plugin: cgroups] collecting output of 'systemd-cgls'
[plugin: cgroups] collected output of 'systemd-cgls' in 0.325278997421
[plugin: cgroups] collected plugin 'cgroups' in 307.146094084
  • sosreport collects so many files (300k files) and it takes so long time like 7 hours.

Environment

  • Red Hat Enterprise Linux 7
  • Red Hat OpenShift Container Platform 3.x
  • Red Hat OpenStack Platform 13

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