Merge pull request #78053 from ksubrmnn/crisocket

Implement CRI detection for Windows

cmd/kubeadm/app/apis/kubeadm/v1beta1/defaults_windows.go

@@ -22,5 +22,5 @@ const (
 	// DefaultCACertPath defines default location of CA certificate on Windows
 	DefaultCACertPath = "C:/etc/kubernetes/pki/ca.crt"
 	// DefaultUrlScheme defines default socket url prefix
-	DefaultUrlScheme = "tcp"
+	DefaultUrlScheme = "npipe"
 )

cmd/kubeadm/app/apis/kubeadm/v1beta2/defaults_windows.go

@@ -22,5 +22,5 @@ const (
 	// DefaultCACertPath defines default location of CA certificate on Windows
 	DefaultCACertPath = "C:/etc/kubernetes/pki/ca.crt"
 	// DefaultUrlScheme defines default socket url prefix
-	DefaultUrlScheme = "tcp"
+	DefaultUrlScheme = "npipe"
 )

cmd/kubeadm/app/constants/constants_windows.go

@@ -20,5 +20,5 @@ package constants
 
 const (
 	// DefaultDockerCRISocket defines the default Docker CRI socket
-	DefaultDockerCRISocket = "tcp://localhost:2375"
+	DefaultDockerCRISocket = "npipe:////./pipe/docker_engine"
 )

cmd/kubeadm/app/util/runtime/BUILD

@@ -2,7 +2,11 @@ load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
 
 go_library(
     name = "go_default_library",
-    srcs = ["runtime.go"],
+    srcs = [
+        "runtime.go",
+        "runtime_unix.go",
+        "runtime_windows.go",
+    ],
     importpath = "k8s.io/kubernetes/cmd/kubeadm/app/util/runtime",
     visibility = ["//visibility:public"],
     deps = [
@@ -10,7 +14,12 @@ go_library(
         "//staging/src/k8s.io/apimachinery/pkg/util/errors:go_default_library",
         "//vendor/github.com/pkg/errors:go_default_library",
         "//vendor/k8s.io/utils/exec:go_default_library",
-    ],
+    ] + select({
+        "@io_bazel_rules_go//go/platform:windows": [
+            "//vendor/github.com/Microsoft/go-winio:go_default_library",
+        ],
+        "//conditions:default": [],
+    }),
 )
 
 go_test(

cmd/kubeadm/app/util/runtime/runtime.go

@@ -17,7 +17,6 @@ limitations under the License.
 package util
 
 import (
-	"os"
 	"path/filepath"
 	goruntime "runtime"
 	"strings"
@@ -180,23 +179,8 @@ func (runtime *DockerRuntime) ImageExists(image string) (bool, error) {
 	return err == nil, nil
 }
 
-// isExistingSocket checks if path exists and is domain socket
-func isExistingSocket(path string) bool {
-	fileInfo, err := os.Stat(path)
-	if err != nil {
-		return false
-	}
-
-	return fileInfo.Mode()&os.ModeSocket != 0
-}
-
 // detectCRISocketImpl is separated out only for test purposes, DON'T call it directly, use DetectCRISocket instead
 func detectCRISocketImpl(isSocket func(string) bool) (string, error) {
-	const (
-		dockerSocket     = "/var/run/docker.sock" // The Docker socket is not CRI compatible
-		containerdSocket = "/run/containerd/containerd.sock"
-	)
-
 	foundCRISockets := []string{}
 	knownCRISockets := []string{
 		// Docker and containerd sockets are special cased below, hence not to be included here
@@ -233,9 +217,5 @@ func detectCRISocketImpl(isSocket func(string) bool) (string, error) {
 
 // DetectCRISocket uses a list of known CRI sockets to detect one. If more than one or none is discovered, an error is returned.
 func DetectCRISocket() (string, error) {
-	if goruntime.GOOS != "linux" {
-		return constants.DefaultDockerCRISocket, nil
-	}
-
 	return detectCRISocketImpl(isExistingSocket)
 }

cmd/kubeadm/app/util/runtime/runtime_unix.go

@@ -0,0 +1,38 @@
+// +build !windows
+
+/*
+Copyright 2019 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 util
+
+import (
+	"os"
+)
+
+const (
+	dockerSocket     = "/var/run/docker.sock" // The Docker socket is not CRI compatible
+	containerdSocket = "/run/containerd/containerd.sock"
+)
+
+// isExistingSocket checks if path exists and is domain socket
+func isExistingSocket(path string) bool {
+	fileInfo, err := os.Stat(path)
+	if err != nil {
+		return false
+	}
+
+	return fileInfo.Mode()&os.ModeSocket != 0
+}

cmd/kubeadm/app/util/runtime/runtime_windows.go

@@ -0,0 +1,38 @@
+// +build windows
+
+/*
+Copyright 2019 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 util
+
+import (
+	winio "github.com/Microsoft/go-winio"
+)
+
+const (
+	dockerSocket     = "//./pipe/docker_engine"         // The Docker socket is not CRI compatible
+	containerdSocket = "//./pipe/containerd-containerd" // Proposed containerd named pipe for Windows
+)
+
+// isExistingSocket checks if path exists and is domain socket
+func isExistingSocket(path string) bool {
+	_, err := winio.DialPipe(path, nil)
+	if err != nil {
+		return false
+	}
+
+	return true
+}