From 8fc3d8f7b669a1b06726905f75dcc0d32f327b23 Mon Sep 17 00:00:00 2001
From: Victor Marmol <vmarmol@google.com>
Date: Mon, 13 Apr 2015 17:03:09 -0700
Subject: [PATCH] Adding utility for creating resource containers.

Allows creating and running in resource-only containers.
---
 pkg/util/resource_container_linux.go       | 41 ++++++++++++++++++++++
 pkg/util/resource_container_unsupported.go | 27 ++++++++++++++
 2 files changed, 68 insertions(+)
 create mode 100644 pkg/util/resource_container_linux.go
 create mode 100644 pkg/util/resource_container_unsupported.go

diff --git a/pkg/util/resource_container_linux.go b/pkg/util/resource_container_linux.go
new file mode 100644
index 00000000000..ec52f5ea134
--- /dev/null
+++ b/pkg/util/resource_container_linux.go
@@ -0,0 +1,41 @@
+// +build linux
+
+/*
+Copyright 2015 Google Inc. 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 util
+
+import (
+	"os"
+
+	"github.com/docker/libcontainer/cgroups/fs"
+	"github.com/docker/libcontainer/configs"
+)
+
+// Creates resource-only containerName if it does not already exist and moves
+// the current process to it.
+//
+// containerName must be an absolute container name.
+func RunInResourceContainer(containerName string) error {
+	manager := fs.Manager{
+		Cgroups: &configs.Cgroup{
+			Name:            containerName,
+			AllowAllDevices: true,
+		},
+	}
+
+	return manager.Apply(os.Getpid())
+}
diff --git a/pkg/util/resource_container_unsupported.go b/pkg/util/resource_container_unsupported.go
new file mode 100644
index 00000000000..9903c794dcb
--- /dev/null
+++ b/pkg/util/resource_container_unsupported.go
@@ -0,0 +1,27 @@
+// +build !linux
+
+/*
+Copyright 2015 Google Inc. 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 util
+
+import (
+	"errors"
+)
+
+func RunInResourceContainer(containerName string) error {
+	return errors.New("resource-only containers unsupported in this platform")
+}