Kubelet: only apply default hard evictions of nodefs.inodesFree on Linux

pkg/kubelet/apis/config/fuzzer/fuzzer.go

@@ -81,12 +81,7 @@ func Funcs(codecs runtimeserializer.CodecFactory) []interface{} {
 			obj.KubeAPIQPS = 5
 			obj.KubeAPIBurst = 10
 			obj.HairpinMode = v1beta1.PromiscuousBridge
-			obj.EvictionHard = map[string]string{
-				"memory.available":  "100Mi",
-				"nodefs.available":  "10%",
-				"nodefs.inodesFree": "5%",
-				"imagefs.available": "15%",
-			}
+			obj.EvictionHard = kubeletconfigv1beta1.DefaultEvictionHard
 			obj.EvictionPressureTransitionPeriod = metav1.Duration{Duration: 5 * time.Minute}
 			obj.MakeIPTablesUtilChains = true
 			obj.IPTablesMasqueradeBit = kubeletconfigv1beta1.DefaultIPTablesMasqueradeBit

pkg/kubelet/apis/config/v1beta1/BUILD

@@ -9,6 +9,8 @@ go_library(
     name = "go_default_library",
     srcs = [
         "defaults.go",
+        "defaults_linux.go",
+        "defaults_others.go",
         "doc.go",
         "register.go",
         "zz_generated.conversion.go",

pkg/kubelet/apis/config/v1beta1/defaults.go

@@ -178,12 +178,7 @@ func SetDefaults_KubeletConfiguration(obj *kubeletconfigv1beta1.KubeletConfigura
 		obj.SerializeImagePulls = utilpointer.BoolPtr(true)
 	}
 	if obj.EvictionHard == nil {
-		obj.EvictionHard = map[string]string{
-			"memory.available":  "100Mi",
-			"nodefs.available":  "10%",
-			"nodefs.inodesFree": "5%",
-			"imagefs.available": "15%",
-		}
+		obj.EvictionHard = DefaultEvictionHard
 	}
 	if obj.EvictionPressureTransitionPeriod == zeroDuration {
 		obj.EvictionPressureTransitionPeriod = metav1.Duration{Duration: 5 * time.Minute}

pkg/kubelet/apis/config/v1beta1/defaults_linux.go

@@ -0,0 +1,27 @@
+// +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 v1beta1
+
+// DefaultEvictionHard includes default options for hard eviction.
+var DefaultEvictionHard = map[string]string{
+	"memory.available":  "100Mi",
+	"nodefs.available":  "10%",
+	"nodefs.inodesFree": "5%",
+	"imagefs.available": "15%",
+}

pkg/kubelet/apis/config/v1beta1/defaults_others.go

@@ -0,0 +1,26 @@
+// +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 v1beta1
+
+// DefaultEvictionHard includes default options for hard eviction.
+var DefaultEvictionHard = map[string]string{
+	"memory.available":  "100Mi",
+	"nodefs.available":  "10%",
+	"imagefs.available": "15%",
+}