Fix golint issues for pkg/util/rlimit

pkg/util/rlimit/rlimit_linux.go:25:1: exported function RlimitNumFiles should have comment or be unexported
pkg/util/rlimit/rlimit_linux.go:25:6: func name will be used as rlimit.RlimitNumFiles by other packages, and that stutters; consider calling this NumFiles
pkg/util/rlimit/rlimit_unsupported.go:25:1: exported function RlimitNumFiles should have comment or be unexported
pkg/util/rlimit/rlimit_unsupported.go:25:6: func name will be used as rlimit.RlimitNumFiles by other packages, and that stutters; consider calling this NumFiles

Ref: kubernetes#68026

Author: Steve Azzopardi

cmd/kubelet/app/server.go

@@ -1112,7 +1112,7 @@ func RunKubelet(kubeServer *options.KubeletServer, kubeDeps *kubelet.Dependencie
 	}
 	podCfg := kubeDeps.PodConfig
 
-	if err := rlimit.RlimitNumFiles(uint64(kubeServer.MaxOpenFiles)); err != nil {
+	if err := rlimit.SetNumFiles(uint64(kubeServer.MaxOpenFiles)); err != nil {
 		klog.Errorf("Failed to set rlimit on max file handles: %v", err)
 	}
 

hack/.golint_failures

@@ -193,7 +193,6 @@ pkg/util/labels # See previous effort in PR #80685
 pkg/util/oom
 pkg/util/procfs
 pkg/util/removeall
-pkg/util/rlimit
 pkg/util/selinux
 pkg/util/taints
 pkg/volume

pkg/util/rlimit/rlimit_linux.go

@@ -22,6 +22,7 @@ import (
 	"golang.org/x/sys/unix"
 )
 
-func RlimitNumFiles(maxOpenFiles uint64) error {
+// SetNumFiles sets the linux rlimit for the maximum open files.
+func SetNumFiles(maxOpenFiles uint64) error {
 	return unix.Setrlimit(unix.RLIMIT_NOFILE, &unix.Rlimit{Max: maxOpenFiles, Cur: maxOpenFiles})
 }

pkg/util/rlimit/rlimit_unsupported.go

@@ -22,6 +22,7 @@ import (
 	"errors"
 )
 
-func RlimitNumFiles(maxOpenFiles uint64) error {
+// SetNumFiles sets the rlimit for the maximum open files.
+func SetNumFiles(maxOpenFiles uint64) error {
 	return errors.New("SetRLimit unsupported in this platform")
 }