| Commit message (Collapse) | Author | Age |
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In case os.Open[File], os.Mkdir[All], ioutil.ReadFile and the like
fails, the error message already contains the file name and the
operation that fails, so there is no need to wrap the error with
something like "open %s failed".
While at it
- replace a few places with os.Open, ioutil.ReadAll with
ioutil.ReadFile.
- replace errors.Wrapf with errors.Wrap for cases where there
are no %-style arguments.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
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- misspell
- prealloc
- unparam
- nakedret
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
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Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
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the two values were incorrectly switched.
Signed-off-by: Giuseppe Scrivano <giuseppe@scrivano.org>
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if the cgroup cannot be deleted, then attempt to delete all its
subdirectories and try again.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
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if the cpuacct file doesn't exist, ignore it instead of erroring out.
Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1728242
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
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drop the limitation of not supporting creating new cgroups v2 paths.
Every controller enabled /sys/fs/cgroup will be propagated down to the
created path. This won't work for rootless cgroupsv2, but it is not
an issue for now, as this code is used only by CRI-O.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
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convert the time we read in microseconds to nanoseconds.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
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This is an initial implementation of cgroup v2 support for
pkg/cgroups. It currently works with crun, with this patch:
https://github.com/giuseppe/crun/pull/49).
It adds the pieces for:
- set PID limit to 1
- retrieve stats so that "podman stats" work.
the only missing part is the support for reading per
CPU stats (that is cpuacct.usage_percpu on cgroup v1), so for now it
always returns an empty result.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
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provide a package for managing cgroups. This is not supposed to be a
complete implementation with all the features supported by cgroups,
but it is a minimal implementation designed around what libpod needs
and it is currently using.
For example, it is currently possible to Apply only the pids limit,
as it is used by libpod for stopping containers, any other Apply will
just fail.
The main goal here is to have a minimal library where we have full
control, so we can start playing with cgroup v2.
When the need arises, we can add more features.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
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