VMware vSphere Integrated Containers provider (#206)

* Add Virtual Kubelet provider for VIC

Initial virtual kubelet provider for VMware VIC.  This provider currently
handles creating and starting of a pod VM via the VIC portlayer and persona
server.  Image store handling via the VIC persona server.  This provider
currently requires the feature/wolfpack branch of VIC.

* Added pod stop and delete.  Also added node capacity.

Added the ability to stop and delete pod VMs via VIC.  Also retrieve
node capacity information from the VCH.

* Cleanup and readme file

Some file clean up and added a Readme.md markdown file for the VIC
provider.

* Cleaned up errors, added function comments, moved operation code

1. Cleaned up error handling.  Set standard for creating errors.
2. Added method prototype comments for all interface functions.
3. Moved PodCreator, PodStarter, PodStopper, and PodDeleter to a new folder.

* Add mocking code and unit tests for podcache, podcreator, and podstarter

Used the unit test framework used in VIC to handle assertions in the provider's
unit test.  Mocking code generated using OSS project mockery, which is compatible
with the testify assertion framework.

* Vendored packages for the VIC provider

Requires feature/wolfpack branch of VIC and a few specific commit sha of
projects used within VIC.

* Implementation of POD Stopper and Deleter unit tests (#4)

* Updated files for initial PR

vendor/github.com/vmware/vic/lib/migration/plugins/plugin9/container_create_timestamp.go

@@ -0,0 +1,81 @@
+// Copyright 2017 VMware, 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 plugin9
+
+import (
+	"context"
+	"fmt"
+
+	log "github.com/Sirupsen/logrus"
+
+	"github.com/vmware/vic/lib/migration/errors"
+	"github.com/vmware/vic/lib/migration/feature"
+	"github.com/vmware/vic/lib/migration/manager"
+	"github.com/vmware/vic/pkg/trace"
+	"github.com/vmware/vic/pkg/vsphere/extraconfig"
+	"github.com/vmware/vic/pkg/vsphere/session"
+)
+
+const target = manager.ContainerConfigure
+
+func init() {
+	defer trace.End(trace.Begin(fmt.Sprintf("Registering plugin %s:%d", target, feature.ContainerCreateTimestampVersion)))
+	if err := manager.Migrator.Register(feature.ContainerCreateTimestampVersion, target, &ContainerCreateTimestampVersion{}); err != nil {
+		log.Errorf("Failed to register plugin %s:%d, %s", target, feature.ContainerCreateTimestampVersion, err)
+		panic(err)
+	}
+}
+
+// ContainerCreateTimestampVersion is a plugin to convert stored container create timestamps
+// in seconds to nanoseconds in the container configuration.
+type ContainerCreateTimestampVersion struct {
+}
+
+// ExecutorConfig is used to update the container create time from seconds to nanoseconds.
+type ExecutorConfig struct {
+	CreateTime int64 `vic:"0.1" scope:"read-write" key:"createtime"`
+}
+
+// Migrate converts the stored container create timestamp (in seconds) to nanoseconds.
+func (c *ContainerCreateTimestampVersion) Migrate(ctx context.Context, s *session.Session, data interface{}) error {
+	defer trace.End(trace.Begin(fmt.Sprintf("ContainerCreateTimestampVersion version %d", feature.ContainerCreateTimestampVersion)))
+	if data == nil {
+		return nil
+	}
+	mapData, ok := data.(map[string]string)
+	if !ok {
+		// Log the error here and return nil so that other plugins can proceed.
+		log.Errorf("Migration data format is not map: %+v", data)
+		return nil
+	}
+	oldStruct := &ExecutorConfig{}
+	result := extraconfig.Decode(extraconfig.MapSource(mapData), oldStruct)
+	log.Debugf("The oldStruct is %+v", oldStruct)
+	if result == nil {
+		return &errors.DecodeError{Err: fmt.Errorf("decode oldStruct %+v failed", oldStruct)}
+	}
+
+	// Convert create timestamp to nanoseconds for older containers that use seconds.
+	oldStruct.CreateTime *= 1e9
+
+	cfg := make(map[string]string)
+	extraconfig.Encode(extraconfig.MapSink(cfg), oldStruct)
+
+	for k, v := range cfg {
+		log.Debugf("New data: %s:%s", k, v)
+		mapData[k] = v
+	}
+	return nil
+}

vendor/github.com/vmware/vic/lib/migration/plugins/plugin9/container_create_timestamp_test.go

@@ -0,0 +1,49 @@
+// Copyright 2017 VMware, 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 plugin9
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/vmware/vic/lib/config/executor"
+	"github.com/vmware/vic/pkg/vsphere/extraconfig"
+)
+
+// TestMigrateContainerCreateTimestamp tests this package's ContainerCreateTimestampVersion.Migrate.
+func TestMigrateContainerCreateTimestamp(t *testing.T) {
+	secSinceEpoch := int64(1510950922)
+	oldCreateTime := secSinceEpoch
+	newCreateTime := secSinceEpoch * 1e9
+	layerID := "abcdefg"
+	execConfig := executor.ExecutorConfig{
+		CreateTime: oldCreateTime,
+		// Supply an extra field that's not accessed in the plugin9 migrator to
+		// ensure that unneeded fields aren't dropped from the returned data.
+		LayerID: layerID,
+	}
+
+	c := ContainerCreateTimestampVersion{}
+	mapData := make(map[string]string)
+	extraconfig.Encode(extraconfig.MapSink(mapData), execConfig)
+
+	err := c.Migrate(nil, nil, mapData)
+	assert.NoError(t, err)
+
+	newConf := extraconfig.Decode(extraconfig.MapSource(mapData), execConfig)
+	assert.Equal(t, newCreateTime, newConf.(executor.ExecutorConfig).CreateTime)
+	assert.Equal(t, layerID, newConf.(executor.ExecutorConfig).LayerID)
+}