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If the kernel version is at least 6.4, assume tmpfs noswap is supported

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Signed-off-by: Itamar Holder <iholder@redhat.com>
This commit is contained in:
Itamar Holder 2024-05-15 10:47:45 +03:00
parent 3b9b03935e
commit 2a174d09fa
2 changed files with 14 additions and 0 deletions
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12
pkg/kubelet/util/swap/swap_util.go
View File

@ -21,7 +21,9 @@ import (
sysruntime "runtime"
"sync"
"k8s.io/apimachinery/pkg/util/version"
"k8s.io/klog/v2"
utilkernel "k8s.io/kubernetes/pkg/util/kernel"
"k8s.io/mount-utils"
)
@ -38,6 +40,16 @@ func IsTmpfsNoswapOptionSupported(mounter mount.Interface) bool {
return false
}
kernelVersion, err := utilkernel.GetVersion()
if err != nil {
klog.ErrorS(err, "cannot determine kernel version, unable to determine is tmpfs noswap is supported")
return false
}
if kernelVersion.AtLeast(version.MustParseGeneric(utilkernel.TmpfsNoswapSupportKernelVersion)) {
return true
}
mountDir, err := os.MkdirTemp("", "tmpfs-noswap-test-")
if err != nil {
klog.InfoS("error creating dir to test if tmpfs noswap is enabled. Assuming not supported", "mount path", mountDir, "error", err)

2
pkg/util/kernel/constants.go
View File

@ -47,3 +47,5 @@ const IPVSConnReuseModeFixedKernelVersion = "5.9"
// UserNamespacesSupportKernelVersion is the kernel version where idmap for tmpfs support was added
// (ref: https://github.com/torvalds/linux/commit/05e6295f7b5e05f09e369a3eb2882ec5b40fff20)
const UserNamespacesSupportKernelVersion = "6.3"
const TmpfsNoswapSupportKernelVersion = "6.4"