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kubelet, cgroupv2: make hugetlb optional

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make the hugetlb controller optional when cgroup v2 is used.

Closes: https://github.com/kubernetes/kubernetes/issues/92933

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
This commit is contained in:
Giuseppe Scrivano 2020-07-13 09:40:44 +02:00
parent bb8a5d2ada
commit 79be8be10e
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1 changed files with 8 additions and 0 deletions
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8
pkg/kubelet/cm/cgroup_manager_linux.go
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@ -497,6 +497,14 @@ func setResourcesV2(cgroupConfig *libcontainerconfigs.Cgroup) error {
}
cgroupConfig.Resources.SkipDevices = true
// if the hugetlb controller is missing
supportedControllers := getSupportedUnifiedControllers()
if !supportedControllers.Has("hugetlb") {
cgroupConfig.Resources.HugetlbLimit = nil
// the cgroup is not present, but its not required so skip it
klog.V(6).Infof("Optional subsystem not supported: hugetlb")
}
manager, err := cgroupfs2.NewManager(cgroupConfig, cgroupConfig.Path, false)
if err != nil {
return fmt.Errorf("failed to create cgroup v2 manager: %v", err)