virtcontainers: Initial import

This is a virtcontainers 1.0.8 import into Kata Containers runtime.

virtcontainers is a Go library designed to manage hardware virtualized
pods and containers. It is the core Clear Containers framework and will
become the core Kata Containers framework, as discussed at
https://github.com/kata-containers/runtime/issues/33

Some more more pointers:

virtcontainers README, including some design and architecure notes:
https://github.com/containers/virtcontainers/blob/master/README.md

virtcontainers 1.0 API:
https://github.com/containers/virtcontainers/blob/master/documentation/api/1.0/api.md

Fixes #40

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

virtcontainers/virtcontainers_test.go

@@ -0,0 +1,149 @@
+//
+// Copyright (c) 2017 Intel Corporation
+//
+// 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 virtcontainers
+
+import (
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/sirupsen/logrus"
+)
+
+const testPodID = "7f49d00d-1995-4156-8c79-5f5ab24ce138"
+const testContainerID = "containerID"
+const testKernel = "kernel"
+const testImage = "image"
+const testHypervisor = "hypervisor"
+const testBundle = "bundle"
+
+const testDisabledAsNonRoot = "Test disabled as requires root privileges"
+
+// package variables set in TestMain
+var testDir = ""
+var podDirConfig = ""
+var podFileConfig = ""
+var podDirState = ""
+var podDirLock = ""
+var podFileState = ""
+var podFileLock = ""
+var testQemuKernelPath = ""
+var testQemuImagePath = ""
+var testQemuPath = ""
+var testHyperstartCtlSocket = ""
+var testHyperstartTtySocket = ""
+
+// cleanUp Removes any stale pod/container state that can affect
+// the next test to run.
+func cleanUp() {
+	for _, dir := range []string{testDir, defaultSharedDir} {
+		os.RemoveAll(dir)
+		os.MkdirAll(dir, dirMode)
+	}
+
+	os.Mkdir(filepath.Join(testDir, testBundle), dirMode)
+
+	_, err := os.Create(filepath.Join(testDir, testImage))
+	if err != nil {
+		fmt.Println("Could not recreate test image:", err)
+		os.Exit(1)
+	}
+}
+
+// TestMain is the common main function used by ALL the test functions
+// for this package.
+func TestMain(m *testing.M) {
+	var err error
+
+	flag.Parse()
+
+	logger := logrus.New()
+	logger.Level = logrus.ErrorLevel
+	for _, arg := range flag.Args() {
+		if arg == "debug-logs" {
+			logger.Level = logrus.DebugLevel
+		}
+	}
+	SetLogger(logger)
+
+	testDir, err = ioutil.TempDir("", "virtcontainers-tmp-")
+	if err != nil {
+		panic(err)
+	}
+
+	err = os.MkdirAll(testDir, dirMode)
+	if err != nil {
+		fmt.Println("Could not create test directories:", err)
+		os.Exit(1)
+	}
+
+	_, err = os.Create(filepath.Join(testDir, testKernel))
+	if err != nil {
+		fmt.Println("Could not create test kernel:", err)
+		os.RemoveAll(testDir)
+		os.Exit(1)
+	}
+
+	_, err = os.Create(filepath.Join(testDir, testImage))
+	if err != nil {
+		fmt.Println("Could not create test image:", err)
+		os.RemoveAll(testDir)
+		os.Exit(1)
+	}
+
+	_, err = os.Create(filepath.Join(testDir, testHypervisor))
+	if err != nil {
+		fmt.Println("Could not create test hypervisor:", err)
+		os.RemoveAll(testDir)
+		os.Exit(1)
+	}
+
+	err = os.Mkdir(filepath.Join(testDir, testBundle), dirMode)
+	if err != nil {
+		fmt.Println("Could not create test bundle directory:", err)
+		os.RemoveAll(testDir)
+		os.Exit(1)
+	}
+
+	// allow the tests to run without affecting the host system.
+	configStoragePath = filepath.Join(testDir, storagePathSuffix, "config")
+	runStoragePath = filepath.Join(testDir, storagePathSuffix, "run")
+
+	// set now that configStoragePath has been overridden.
+	podDirConfig = filepath.Join(configStoragePath, testPodID)
+	podFileConfig = filepath.Join(configStoragePath, testPodID, configFile)
+	podDirState = filepath.Join(runStoragePath, testPodID)
+	podDirLock = filepath.Join(runStoragePath, testPodID)
+	podFileState = filepath.Join(runStoragePath, testPodID, stateFile)
+	podFileLock = filepath.Join(runStoragePath, testPodID, lockFileName)
+
+	testQemuKernelPath = filepath.Join(testDir, testKernel)
+	testQemuImagePath = filepath.Join(testDir, testImage)
+	testQemuPath = filepath.Join(testDir, testHypervisor)
+
+	testHyperstartCtlSocket = filepath.Join(testDir, "test_hyper.sock")
+	testHyperstartTtySocket = filepath.Join(testDir, "test_tty.sock")
+
+	ret := m.Run()
+
+	os.RemoveAll(testDir)
+
+	os.Exit(ret)
+}