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kubelet: Add logs for userns custom mappings parsing

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Signed-off-by: Rodrigo Campos <rodrigoca@microsoft.com>
This commit is contained in:
Rodrigo Campos 2024-03-04 16:05:02 -03:00
parent e568a77a93
commit e6694b0ede
1 changed files with 4 additions and 2 deletions
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6
pkg/kubelet/kubelet_pods.go
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@ -136,6 +136,7 @@ func (kl *Kubelet) getKubeletMappings() (uint32, uint32, error) {
var unknownUserErr user.UnknownUserError
if goerrors.As(err, &unknownUserErr) {
// if the user is not found, we assume that the user is not configured
klog.V(5).InfoS("user namespaces: user not found, using default mappings", "user", kubeletUser)
return defaultFirstID, defaultLen, nil
}
return 0, 0, err
@ -145,14 +146,14 @@ func (kl *Kubelet) getKubeletMappings() (uint32, uint32, error) {
cmd, err := exec.LookPath(execName)
if err != nil {
if os.IsNotExist(err) {
klog.V(2).InfoS("Could not find executable, default mappings will be used for the user namespaces", "executable", execName, "err", err)
klog.V(2).InfoS("user namespaces: executable not found, using default mappings", "executable", execName, "err", err)
return defaultFirstID, defaultLen, nil
}
return 0, 0, err
}
outUids, err := exec.Command(cmd, kubeletUser).Output()
if err != nil {
return 0, 0, fmt.Errorf("error retrieving additional ids for user %q", kubeletUser)
return 0, 0, fmt.Errorf("error retrieving additional uids for user %q: %w", kubeletUser, err)
}
outGids, err := exec.Command(cmd, "-g", kubeletUser).Output()
if err != nil {
@ -161,6 +162,7 @@ func (kl *Kubelet) getKubeletMappings() (uint32, uint32, error) {
if string(outUids) != string(outGids) {
return 0, 0, fmt.Errorf("mismatched subuids and subgids for user %q", kubeletUser)
}
klog.V(5).InfoS("user namespaces: user found, using mappings from getsubids", "user", kubeletUser)
return parseGetSubIdsOutput(string(outUids))
}