libct: decouple libct/cg/devices #4248
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Commit b6967fa moved the functionality of managing cgroup devices into a separate package, and decoupled libcontainer/cgroups from it. Yet, some software (e.g. cadvisor) may need to use libcontainer package, which imports libcontainer/cgroups/devices, thus making it impossible to use libcontainer without bringing in cgroup/devices dependency. In fact, we only need to manage devices in runc binary, so move the import to main.go. The need to import libct/cg/dev in order to manage devices is already documented in libcontainer/cgroups, but let's - update that documentation; - add a similar note to libcontainer/cgroups/systemd; - add a note to libct README. Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
AkihiroSuda
approved these changes
Apr 17, 2024
lifubang
approved these changes
Apr 26, 2024
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This is the last step of refactoring done in #3452, which is needed to use runc/libct v1.2 in kubernetes and other libcontainer users (to avoid massive cilium/ebpf dependency).
Commit b6967fa moved the functionality of managing cgroup devices into a separate package, and decoupled libcontainer/cgroups from it.
Yet, some software (e.g. cadvisor) may need to use libcontainer package, which imports libcontainer/cgroups/devices, thus making it impossible to use libcontainer without bringing in cgroup/devices dependency.
In fact, we only need to manage devices in runc binary, so move the import to main.go.
The need to import libct/cg/dev in order to manage devices is already documented in libcontainer/cgroups. Let's improve that: