Support volume relabling for pods which specify an SELinux label

pkg/util/selinux/doc.go

@@ -0,0 +1,18 @@
+/*
+Copyright 2015 The Kubernetes Authors All rights reserved.
+
+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 selinux contains selinux utility functions.
+package selinux

pkg/util/selinux/selinux.go

@@ -0,0 +1,27 @@
+/*
+Copyright 2014 The Kubernetes Authors All rights reserved.
+
+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 selinux
+
+// chconRunner knows how to chcon a directory.
+type ChconRunner interface {
+	SetContext(dir, context string) error
+}
+
+// newChconRunner returns a new chconRunner.
+func NewChconRunner() ChconRunner {
+	return &realChconRunner{}
+}

pkg/util/selinux/selinux_linux.go

@@ -0,0 +1,34 @@
+// +build linux
+
+/*
+Copyright 2014 The Kubernetes Authors All rights reserved.
+
+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 selinux
+
+import (
+	"github.com/docker/libcontainer/selinux"
+)
+
+type realChconRunner struct{}
+
+func (_ *realChconRunner) SetContext(dir, context string) error {
+	// If SELinux is not enabled, return an empty string
+	if !selinux.SelinuxEnabled() {
+		return nil
+	}
+
+	return selinux.Setfilecon(dir, context)
+}

pkg/util/selinux/selinux_unsupported.go

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+// +build !linux
+
+/*
+Copyright 2014 The Kubernetes Authors All rights reserved.
+
+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 selinux
+
+type realChconRunner struct{}
+
+func (_ *realChconRunner) SetContext(dir, context string) error {
+	// NOP
+	return nil
+}