Update vendor/k8s.io/utils

Godeps/Godeps.json

@@ -4090,39 +4090,47 @@
 		},
 		{
 			"ImportPath": "k8s.io/utils/buffer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/clock",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/exec",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/exec/testing",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/integer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/io",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
+		},
+		{
+			"ImportPath": "k8s.io/utils/keymutex",
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/nsenter",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/pointer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
+		},
+		{
+			"ImportPath": "k8s.io/utils/strings",
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/trace",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "sigs.k8s.io/yaml",

staging/src/k8s.io/apiextensions-apiserver/Godeps/Godeps.json

@@ -2556,15 +2556,15 @@
 		},
 		{
 			"ImportPath": "k8s.io/utils/buffer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/integer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/trace",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "sigs.k8s.io/yaml",

staging/src/k8s.io/apiserver/Godeps/Godeps.json

@@ -2052,19 +2052,19 @@
 		},
 		{
 			"ImportPath": "k8s.io/utils/buffer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/integer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/pointer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/trace",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "sigs.k8s.io/yaml",

staging/src/k8s.io/cli-runtime/Godeps/Godeps.json

@@ -612,7 +612,7 @@
 		},
 		{
 			"ImportPath": "k8s.io/utils/integer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "sigs.k8s.io/yaml",

staging/src/k8s.io/client-go/Godeps/Godeps.json

@@ -616,15 +616,15 @@
 		},
 		{
 			"ImportPath": "k8s.io/utils/buffer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/integer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/trace",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "sigs.k8s.io/yaml",

staging/src/k8s.io/cloud-provider/Godeps/Godeps.json

@@ -952,15 +952,15 @@
 		},
 		{
 			"ImportPath": "k8s.io/utils/buffer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/integer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/trace",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "sigs.k8s.io/yaml",

staging/src/k8s.io/component-base/Godeps/Godeps.json

@@ -152,7 +152,7 @@
 		},
 		{
 			"ImportPath": "k8s.io/utils/pointer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		}
 	]
 }

staging/src/k8s.io/csi-api/Godeps/Godeps.json

@@ -548,15 +548,15 @@
 		},
 		{
 			"ImportPath": "k8s.io/utils/buffer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/integer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/trace",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "sigs.k8s.io/yaml",

staging/src/k8s.io/kube-aggregator/Godeps/Godeps.json

@@ -1832,15 +1832,15 @@
 		},
 		{
 			"ImportPath": "k8s.io/utils/buffer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/integer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/trace",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "sigs.k8s.io/yaml",

staging/src/k8s.io/kube-controller-manager/Godeps/Godeps.json

@@ -152,7 +152,7 @@
 		},
 		{
 			"ImportPath": "k8s.io/utils/pointer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		}
 	]
 }

staging/src/k8s.io/kube-proxy/Godeps/Godeps.json

@@ -152,7 +152,7 @@
 		},
 		{
 			"ImportPath": "k8s.io/utils/pointer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		}
 	]
 }

staging/src/k8s.io/kube-scheduler/Godeps/Godeps.json

@@ -152,7 +152,7 @@
 		},
 		{
 			"ImportPath": "k8s.io/utils/pointer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		}
 	]
 }

staging/src/k8s.io/metrics/Godeps/Godeps.json

@@ -524,7 +524,7 @@
 		},
 		{
 			"ImportPath": "k8s.io/utils/integer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "sigs.k8s.io/yaml",

staging/src/k8s.io/node-api/Godeps/Godeps.json

@@ -548,15 +548,15 @@
 		},
 		{
 			"ImportPath": "k8s.io/utils/buffer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/integer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/trace",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "sigs.k8s.io/yaml",

staging/src/k8s.io/sample-apiserver/Godeps/Godeps.json

@@ -1784,15 +1784,15 @@
 		},
 		{
 			"ImportPath": "k8s.io/utils/buffer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/integer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/trace",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "sigs.k8s.io/yaml",

staging/src/k8s.io/sample-cli-plugin/Godeps/Godeps.json

@@ -576,7 +576,7 @@
 		},
 		{
 			"ImportPath": "k8s.io/utils/integer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "sigs.k8s.io/yaml",

staging/src/k8s.io/sample-controller/Godeps/Godeps.json

@@ -1156,15 +1156,15 @@
 		},
 		{
 			"ImportPath": "k8s.io/utils/buffer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/integer",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "k8s.io/utils/trace",
-			"Rev": "8a87304934321b4b0ad72a7cb3cbc715d67d38c7"
+			"Rev": "ed37f7428a91fc2a81070808937195dcd46d320e"
 		},
 		{
 			"ImportPath": "sigs.k8s.io/yaml",

vendor/BUILD

@@ -472,8 +472,10 @@ filegroup(
         "//vendor/k8s.io/utils/exec:all-srcs",
         "//vendor/k8s.io/utils/integer:all-srcs",
         "//vendor/k8s.io/utils/io:all-srcs",
+        "//vendor/k8s.io/utils/keymutex:all-srcs",
         "//vendor/k8s.io/utils/nsenter:all-srcs",
         "//vendor/k8s.io/utils/pointer:all-srcs",
+        "//vendor/k8s.io/utils/strings:all-srcs",
         "//vendor/k8s.io/utils/trace:all-srcs",
         "//vendor/sigs.k8s.io/yaml:all-srcs",
         "//vendor/vbom.ml/util/sortorder:all-srcs",

vendor/k8s.io/utils/keymutex/BUILD

+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "hashed.go",
+        "keymutex.go",
+    ],
+    importmap = "k8s.io/kubernetes/vendor/k8s.io/utils/keymutex",
+    importpath = "k8s.io/utils/keymutex",
+    visibility = ["//visibility:public"],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+    visibility = ["//visibility:public"],
+)

vendor/k8s.io/utils/keymutex/hashed.go

+/*
+Copyright 2018 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package keymutex
+
+import (
+	"hash/fnv"
+	"runtime"
+	"sync"
+)
+
+// NewHashed returns a new instance of KeyMutex which hashes arbitrary keys to
+// a fixed set of locks. `n` specifies number of locks, if n <= 0, we use
+// number of cpus.
+// Note that because it uses fixed set of locks, different keys may share same
+// lock, so it's possible to wait on same lock.
+func NewHashed(n int) KeyMutex {
+	if n <= 0 {
+		n = runtime.NumCPU()
+	}
+	return &hashedKeyMutex{
+		mutexes: make([]sync.Mutex, n),
+	}
+}
+
+type hashedKeyMutex struct {
+	mutexes []sync.Mutex
+}
+
+// Acquires a lock associated with the specified ID.
+func (km *hashedKeyMutex) LockKey(id string) {
+	km.mutexes[km.hash(id)%len(km.mutexes)].Lock()
+}
+
+// Releases the lock associated with the specified ID.
+func (km *hashedKeyMutex) UnlockKey(id string) error {
+	km.mutexes[km.hash(id)%len(km.mutexes)].Unlock()
+	return nil
+}
+
+func (km *hashedKeyMutex) hash(id string) int {
+	h := fnv.New32a()
+	h.Write([]byte(id))
+	return int(h.Sum32())
+}

vendor/k8s.io/utils/keymutex/keymutex.go

+/*
+Copyright 2015 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package keymutex
+
+// KeyMutex is a thread-safe interface for acquiring locks on arbitrary strings.
+type KeyMutex interface {
+	// Acquires a lock associated with the specified ID, creates the lock if one doesn't already exist.
+	LockKey(id string)
+
+	// Releases the lock associated with the specified ID.
+	// Returns an error if the specified ID doesn't exist.
+	UnlockKey(id string) error
+}

vendor/k8s.io/utils/nsenter/BUILD

@@ -3,8 +3,6 @@ load("@io_bazel_rules_go//go:def.bzl", "go_library")
 go_library(
     name = "go_default_library",
     srcs = [
-        "exec.go",
-        "exec_unsupported.go",
         "nsenter.go",
         "nsenter_unsupported.go",
     ],

vendor/k8s.io/utils/nsenter/exec.go

-// +build linux
-
-/*
-Copyright 2018 The Kubernetes Authors.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-package nsenter
-
-import (
-	"context"
-	"fmt"
-	"path/filepath"
-
-	"k8s.io/klog"
-	"k8s.io/utils/exec"
-)
-
-// Executor wraps executor interface to be executed via nsenter
-type Executor struct {
-	// Exec implementation
-	executor exec.Interface
-	// Path to the host's root proc path
-	hostProcMountNsPath string
-}
-
-// NewNsenterExecutor returns new nsenter based executor
-func NewNsenterExecutor(hostRootFsPath string, executor exec.Interface) *Executor {
-	hostProcMountNsPath := filepath.Join(hostRootFsPath, mountNsPath)
-	nsExecutor := &Executor{
-		hostProcMountNsPath: hostProcMountNsPath,
-		executor:            executor,
-	}
-	return nsExecutor
-}
-
-// Command returns a command wrapped with nenter
-func (nsExecutor *Executor) Command(cmd string, args ...string) exec.Cmd {
-	fullArgs := append([]string{fmt.Sprintf("--mount=%s", nsExecutor.hostProcMountNsPath), "--"},
-		append([]string{cmd}, args...)...)
-	klog.V(5).Infof("Running nsenter command: %v %v", nsenterPath, fullArgs)
-	return nsExecutor.executor.Command(nsenterPath, fullArgs...)
-}
-
-// CommandContext returns a CommandContext wrapped with nsenter
-func (nsExecutor *Executor) CommandContext(ctx context.Context, cmd string, args ...string) exec.Cmd {
-	fullArgs := append([]string{fmt.Sprintf("--mount=%s", nsExecutor.hostProcMountNsPath), "--"},
-		append([]string{cmd}, args...)...)
-	klog.V(5).Infof("Running nsenter command: %v %v", nsenterPath, fullArgs)
-	return nsExecutor.executor.CommandContext(ctx, nsenterPath, fullArgs...)
-}
-
-// LookPath returns a LookPath wrapped with nsenter
-func (nsExecutor *Executor) LookPath(file string) (string, error) {
-	return "", fmt.Errorf("not implemented, error looking up : %s", file)
-}

vendor/k8s.io/utils/nsenter/exec_unsupported.go

-// +build !linux
-
-/*
-Copyright 2017 The Kubernetes Authors.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-package nsenter
-
-import (
-	"context"
-	"fmt"
-
-	"k8s.io/utils/exec"
-)
-
-// Executor wraps executor interface to be executed via nsenter
-type Executor struct {
-	// Exec implementation
-	executor exec.Interface
-	// Path to the host's root proc path
-	hostProcMountNsPath string
-}
-
-// NewNsenterExecutor returns new nsenter based executor
-func NewNsenterExecutor(hostRootFsPath string, executor exec.Interface) *Executor {
-	nsExecutor := &Executor{
-		hostProcMountNsPath: hostRootFsPath,
-		executor:            executor,
-	}
-	return nsExecutor
-}
-
-// Command returns a command wrapped with nenter
-func (nsExecutor *Executor) Command(cmd string, args ...string) exec.Cmd {
-	return nil
-}
-
-// CommandContext returns a CommandContext wrapped with nsenter
-func (nsExecutor *Executor) CommandContext(ctx context.Context, cmd string, args ...string) exec.Cmd {
-	return nil
-}
-
-// LookPath returns a LookPath wrapped with nsenter
-func (nsExecutor *Executor) LookPath(file string) (string, error) {
-	return "", fmt.Errorf("not implemented, error looking up : %s", file)
-}

vendor/k8s.io/utils/nsenter/nsenter.go

@@ -40,10 +40,13 @@ const (
 	nsenterPath = "nsenter"
 )
 
-// Nsenter is part of experimental support for running the kubelet
+// Nsenter is a type alias for backward compatibility
+type Nsenter = NSEnter
+
+// NSEnter is part of experimental support for running the kubelet
 // in a container.
 //
-// Nsenter requires:
+// NSEnter requires:
 //
 // 1.  Docker >= 1.6 due to the dependency on the slave propagation mode
 //     of the bind-mount of the kubelet root directory in the container.
@@ -65,20 +68,20 @@ const (
 //     systemd is installed/enabled in the operating system.
 // For more information about mount propagation modes, see:
 //   https://www.kernel.org/doc/Documentation/filesystems/sharedsubtree.txt
-type Nsenter struct {
+type NSEnter struct {
 	// a map of commands to their paths on the host filesystem
 	paths map[string]string
 
 	// Path to the host filesystem, typically "/rootfs". Used only for testing.
 	hostRootFsPath string
 
-	// Exec implementation, used only for testing
+	// Exec implementation
 	executor exec.Interface
 }
 
-// NewNsenter constructs a new instance of Nsenter
-func NewNsenter(hostRootFsPath string, executor exec.Interface) (*Nsenter, error) {
-	ne := &Nsenter{
+// NewNsenter constructs a new instance of NSEnter
+func NewNsenter(hostRootFsPath string, executor exec.Interface) (*NSEnter, error) {
+	ne := &NSEnter{
 		hostRootFsPath: hostRootFsPath,
 		executor:       executor,
 	}
@@ -88,7 +91,7 @@ func NewNsenter(hostRootFsPath string, executor exec.Interface) (*Nsenter, error
 	return ne, nil
 }
 
-func (ne *Nsenter) initPaths() error {
+func (ne *NSEnter) initPaths() error {
 	ne.paths = map[string]string{}
 	binaries := []string{
 		"mount",
@@ -122,7 +125,7 @@ func (ne *Nsenter) initPaths() error {
 }
 
 // Exec executes nsenter commands in hostProcMountNsPath mount namespace
-func (ne *Nsenter) Exec(cmd string, args []string) exec.Cmd {
+func (ne *NSEnter) Exec(cmd string, args []string) exec.Cmd {
 	hostProcMountNsPath := filepath.Join(ne.hostRootFsPath, mountNsPath)
 	fullArgs := append([]string{fmt.Sprintf("--mount=%s", hostProcMountNsPath), "--"},
 		append([]string{ne.AbsHostPath(cmd)}, args...)...)
@@ -130,8 +133,27 @@ func (ne *Nsenter) Exec(cmd string, args []string) exec.Cmd {
 	return ne.executor.Command(nsenterPath, fullArgs...)
 }
 
+// Command returns a command wrapped with nsenter
+func (ne *NSEnter) Command(cmd string, args ...string) exec.Cmd {
+	return ne.Exec(cmd, args)
+}
+
+// CommandContext returns a CommandContext wrapped with nsenter
+func (ne *NSEnter) CommandContext(ctx context.Context, cmd string, args ...string) exec.Cmd {
+	hostProcMountNsPath := filepath.Join(ne.hostRootFsPath, mountNsPath)
+	fullArgs := append([]string{fmt.Sprintf("--mount=%s", hostProcMountNsPath), "--"},
+		append([]string{ne.AbsHostPath(cmd)}, args...)...)
+	klog.V(5).Infof("Running nsenter command: %v %v", nsenterPath, fullArgs)
+	return ne.executor.CommandContext(ctx, nsenterPath, fullArgs...)
+}
+
+// LookPath returns a LookPath wrapped with nsenter
+func (ne *NSEnter) LookPath(file string) (string, error) {
+	return "", fmt.Errorf("not implemented, error looking up : %s", file)
+}
+
 // AbsHostPath returns the absolute runnable path for a specified command
-func (ne *Nsenter) AbsHostPath(command string) string {
+func (ne *NSEnter) AbsHostPath(command string) string {
 	path, ok := ne.paths[command]
 	if !ok {
 		return command
@@ -140,7 +162,7 @@ func (ne *Nsenter) AbsHostPath(command string) string {
 }
 
 // SupportsSystemd checks whether command systemd-run exists
-func (ne *Nsenter) SupportsSystemd() (string, bool) {
+func (ne *NSEnter) SupportsSystemd() (string, bool) {
 	systemdRunPath, ok := ne.paths["systemd-run"]
 	return systemdRunPath, ok && systemdRunPath != ""
 }
@@ -158,7 +180,7 @@ func (ne *Nsenter) SupportsSystemd() (string, bool) {
 //
 // BEWARE! EvalSymlinks is not able to detect symlink looks with mustExist=false!
 // If /tmp/link is symlink to /tmp/link, EvalSymlinks(/tmp/link/foo) returns /tmp/link/foo.
-func (ne *Nsenter) EvalSymlinks(pathname string, mustExist bool) (string, error) {
+func (ne *NSEnter) EvalSymlinks(pathname string, mustExist bool) (string, error) {
 	var args []string
 	if mustExist {
 		// "realpath -e: all components of the path must exist"
@@ -178,16 +200,16 @@ func (ne *Nsenter) EvalSymlinks(pathname string, mustExist bool) (string, error)
 // KubeletPath returns the path name that can be accessed by containerized
 // kubelet. It is recommended to resolve symlinks on the host by EvalSymlinks
 // before calling this function
-func (ne *Nsenter) KubeletPath(pathname string) string {
+func (ne *NSEnter) KubeletPath(pathname string) string {
 	return filepath.Join(ne.hostRootFsPath, pathname)
 }
 
-// NewFakeNsenter returns a Nsenter that does not run "nsenter --mount=... --",
+// NewFakeNsenter returns a NSEnter that does not run "nsenter --mount=... --",
 // but runs everything in the same mount namespace as the unit test binary.
 // rootfsPath is supposed to be a symlink, e.g. /tmp/xyz/rootfs -> /.
-// This fake Nsenter is enough for most operations, e.g. to resolve symlinks,
+// This fake NSEnter is enough for most operations, e.g. to resolve symlinks,
 // but it's not enough to call /bin/mount - unit tests don't run as root.
-func NewFakeNsenter(rootfsPath string) (*Nsenter, error) {
+func NewFakeNsenter(rootfsPath string) (*NSEnter, error) {
 	executor := &fakeExec{
 		rootfsPath: rootfsPath,
 	}
@@ -218,7 +240,7 @@ type fakeExec struct {
 }
 
 func (f fakeExec) Command(cmd string, args ...string) exec.Cmd {
-	// This will intentionaly panic if Nsenter does not provide enough arguments.
+	// This will intentionaly panic if NSEnter does not provide enough arguments.
 	realCmd := args[2]
 	realArgs := args[3:]
 	return exec.New().Command(realCmd, realArgs...)
@@ -233,3 +255,4 @@ func (fakeExec) CommandContext(ctx context.Context, cmd string, args ...string)
 }
 
 var _ exec.Interface = fakeExec{}
+var _ exec.Interface = &NSEnter{}

vendor/k8s.io/utils/nsenter/nsenter_unsupported.go

@@ -19,6 +19,9 @@ limitations under the License.
 package nsenter
 
 import (
+	"context"
+	"fmt"
+
 	"k8s.io/utils/exec"
 )
 
@@ -28,29 +31,49 @@ const (
 	DefaultHostRootFsPath = "/rootfs"
 )
 
-// Nsenter is part of experimental support for running the kubelet
+// Nsenter is a type alias for backward compatibility
+type Nsenter = NSEnter
+
+// NSEnter is part of experimental support for running the kubelet
 // in a container.
-type Nsenter struct {
+type NSEnter struct {
 	// a map of commands to their paths on the host filesystem
 	Paths map[string]string
 }
 
-// NewNsenter constructs a new instance of Nsenter
+// NewNsenter constructs a new instance of NSEnter
 func NewNsenter(hostRootFsPath string, executor exec.Interface) (*Nsenter, error) {
 	return &Nsenter{}, nil
 }
 
 // Exec executes nsenter commands in hostProcMountNsPath mount namespace
-func (ne *Nsenter) Exec(cmd string, args []string) exec.Cmd {
+func (ne *NSEnter) Exec(cmd string, args []string) exec.Cmd {
 	return nil
 }
 
 // AbsHostPath returns the absolute runnable path for a specified command
-func (ne *Nsenter) AbsHostPath(command string) string {
+func (ne *NSEnter) AbsHostPath(command string) string {
 	return ""
 }
 
 // SupportsSystemd checks whether command systemd-run exists
-func (ne *Nsenter) SupportsSystemd() (string, bool) {
+func (ne *NSEnter) SupportsSystemd() (string, bool) {
 	return "", false
 }
+
+// Command returns a command wrapped with nenter
+func (ne *NSEnter) Command(cmd string, args ...string) exec.Cmd {
+	return nil
+}
+
+// CommandContext returns a CommandContext wrapped with nsenter
+func (ne *NSEnter) CommandContext(ctx context.Context, cmd string, args ...string) exec.Cmd {
+	return nil
+}
+
+// LookPath returns a LookPath wrapped with nsenter
+func (ne *NSEnter) LookPath(file string) (string, error) {
+	return "", fmt.Errorf("not implemented, error looking up : %s", file)
+}
+
+var _ exec.Interface = &NSEnter{}

vendor/k8s.io/utils/strings/BUILD

+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "escape.go",
+        "line_delimiter.go",
+        "strings.go",
+    ],
+    importmap = "k8s.io/kubernetes/vendor/k8s.io/utils/strings",
+    importpath = "k8s.io/utils/strings",
+    visibility = ["//visibility:public"],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+    visibility = ["//visibility:public"],
+)

vendor/k8s.io/utils/strings/escape.go

+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package strings
+
+import (
+	"strings"
+)
+
+// EscapeQualifiedName converts a plugin name, which might contain a / into a
+// string that is safe to use on-disk.  This assumes that the input has already
+// been validates as a qualified name.  we use "~" rather than ":" here in case
+// we ever use a filesystem that doesn't allow ":".
+func EscapeQualifiedName(in string) string {
+	return strings.Replace(in, "/", "~", -1)
+}
+
+// UnescapeQualifiedName converts an escaped plugin name (as per EscapeQualifiedName)
+// back to its normal form.  This assumes that the input has already been
+// validates as a qualified name.
+func UnescapeQualifiedName(in string) string {
+	return strings.Replace(in, "~", "/", -1)
+}

vendor/k8s.io/utils/strings/line_delimiter.go

+/*
+Copyright 2015 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package strings
+
+import (
+	"bytes"
+	"io"
+	"strings"
+)
+
+// LineDelimiter is a filter that will split input on lines
+// and bracket each line with the delimiter string.
+type LineDelimiter struct {
+	output    io.Writer
+	delimiter []byte
+	buf       bytes.Buffer
+}
+
+// NewLineDelimiter allocates a new io.Writer that will split input on lines
+// and bracket each line with the delimiter string.  This can be useful in
+// output tests where it is difficult to see and test trailing whitespace.
+func NewLineDelimiter(output io.Writer, delimiter string) *LineDelimiter {
+	return &LineDelimiter{output: output, delimiter: []byte(delimiter)}
+}
+
+// Write writes buf to the LineDelimiter ld. The only errors returned are ones
+// encountered while writing to the underlying output stream.
+func (ld *LineDelimiter) Write(buf []byte) (n int, err error) {
+	return ld.buf.Write(buf)
+}
+
+// Flush all lines up until now.  This will assume insert a linebreak at the current point of the stream.
+func (ld *LineDelimiter) Flush() (err error) {
+	lines := strings.Split(ld.buf.String(), "\n")
+	for _, line := range lines {
+		if _, err = ld.output.Write(ld.delimiter); err != nil {
+			return
+		}
+		if _, err = ld.output.Write([]byte(line)); err != nil {
+			return
+		}
+		if _, err = ld.output.Write(ld.delimiter); err != nil {
+			return
+		}
+		if _, err = ld.output.Write([]byte("\n")); err != nil {
+			return
+		}
+	}
+	return
+}

vendor/k8s.io/utils/strings/strings.go

+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package strings
+
+import (
+	"path"
+	"strings"
+)
+
+// SplitQualifiedName Splits a fully qualified name and returns its namespace and name.
+// Assumes that the input 'str' has been validated.
+func SplitQualifiedName(str string) (string, string) {
+	parts := strings.Split(str, "/")
+	if len(parts) < 2 {
+		return "", str
+	}
+	return parts[0], parts[1]
+}
+
+// JoinQualifiedName joins 'namespace' and 'name' and returns a fully qualified name
+// Assumes that the input is valid.
+func JoinQualifiedName(namespace, name string) string {
+	return path.Join(namespace, name)
+}
+
+// ShortenString returns the first N slice of a string.
+func ShortenString(str string, n int) string {
+	if len(str) <= n {
+		return str
+	}
+	return str[:n]
+}