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podman stats does not work in rootless environments with cgroups V1.
Fix error message and document this fact.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
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use the DBUS user session when running in rootless mode.
Closes: https://github.com/containers/libpod/issues/3801
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
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this is the third round of preparing to use the golangci-lint on our
code base.
Signed-off-by: baude <bbaude@redhat.com>
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cgroupsv2: do not enable controllers for the last component
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do not automatically enable the controllers for the last path
component. It is necessary as once there are enabled controllers in a
cgroup, it won't possible to add processes to it.
Fix conmon being moved to the correct cgroup path when using
--cgroup-manager cgroupfs.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
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be sure to load all the existing handlers, so that they can also be
freed in addition to the handlers we treat differently.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
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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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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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use the new implementation for dealing with cgroups.
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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