Staging the GCE Cloud Provider

**What type of PR is this?**
/kind cleanup

**What this PR does / why we need it**:
Staging the GCE Cloud Provider as part of KEP [20190125-removing-in-tree-providers](https://github.com/kubernetes/enhancements/blob/master/keps/sig-cloud-provider/20190125-removing-in-tree-providers.md). Staging repo setup here https://github.com/kubernetes/legacy-cloud-providers
Moves the GCE cloud provider implementation to staging.
This is in preparation for moving the cloud provider code out of tree entirely.
However we need it in staging while the code needs to be consumed both in/out of tree.

**Which issue(s) this PR fixes**:
Fixes #

**Special notes for your reviewer**:

**Does this PR introduce a user-facing change?**:

```
NONE
```

Updated import dependency tracking.
Factored in the cleanup from kubernetes#77412
Minor fix to go.mod.

Author: cheftako

go.mod

@@ -8,7 +8,6 @@ go 1.12
 
 require (
 	bitbucket.org/bertimus9/systemstat v0.0.0-20180207000608-0eeff89b0690
-	cloud.google.com/go v0.34.0
 	github.com/Azure/azure-sdk-for-go v21.4.0+incompatible
 	github.com/Azure/go-autorest v11.1.2+incompatible
 	github.com/GoogleCloudPlatform/k8s-cloud-provider v0.0.0-20181220005116-f8e995905100

pkg/cloudprovider/providers/BUILD

@@ -14,12 +14,12 @@ go_library(
     ],
     deps = [
         "//pkg/cloudprovider/providers/cloudstack:go_default_library",
-        "//pkg/cloudprovider/providers/gce:go_default_library",
         "//pkg/cloudprovider/providers/openstack:go_default_library",
         "//pkg/cloudprovider/providers/ovirt:go_default_library",
         "//pkg/cloudprovider/providers/photon:go_default_library",
         "//staging/src/k8s.io/legacy-cloud-providers/aws:go_default_library",
         "//staging/src/k8s.io/legacy-cloud-providers/azure:go_default_library",
+        "//staging/src/k8s.io/legacy-cloud-providers/gce:go_default_library",
         "//staging/src/k8s.io/legacy-cloud-providers/vsphere:go_default_library",
     ],
 )
@@ -37,7 +37,6 @@ filegroup(
         ":package-srcs",
         "//pkg/cloudprovider/providers/cloudstack:all-srcs",
         "//pkg/cloudprovider/providers/fake:all-srcs",
-        "//pkg/cloudprovider/providers/gce:all-srcs",
         "//pkg/cloudprovider/providers/openstack:all-srcs",
         "//pkg/cloudprovider/providers/ovirt:all-srcs",
         "//pkg/cloudprovider/providers/photon:all-srcs",

pkg/cloudprovider/providers/providers.go

@@ -19,11 +19,11 @@ package cloudprovider
 import (
 	// Cloud providers
 	_ "k8s.io/kubernetes/pkg/cloudprovider/providers/cloudstack"
-	_ "k8s.io/kubernetes/pkg/cloudprovider/providers/gce"
 	_ "k8s.io/kubernetes/pkg/cloudprovider/providers/openstack"
 	_ "k8s.io/kubernetes/pkg/cloudprovider/providers/ovirt"
 	_ "k8s.io/kubernetes/pkg/cloudprovider/providers/photon"
 	_ "k8s.io/legacy-cloud-providers/aws"
 	_ "k8s.io/legacy-cloud-providers/azure"
+	_ "k8s.io/legacy-cloud-providers/gce"
 	_ "k8s.io/legacy-cloud-providers/vsphere"
 )

pkg/controller/nodeipam/BUILD

@@ -11,14 +11,14 @@ go_test(
     srcs = ["node_ipam_controller_test.go"],
     embed = [":go_default_library"],
     deps = [
-        "//pkg/cloudprovider/providers/gce:go_default_library",
         "//pkg/controller:go_default_library",
         "//pkg/controller/nodeipam/ipam:go_default_library",
         "//pkg/controller/testutil:go_default_library",
         "//staging/src/k8s.io/api/core/v1:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
         "//staging/src/k8s.io/client-go/informers:go_default_library",
         "//staging/src/k8s.io/client-go/kubernetes/fake:go_default_library",
+        "//staging/src/k8s.io/legacy-cloud-providers/gce:go_default_library",
     ],
 )
 

pkg/controller/nodeipam/ipam/BUILD

@@ -42,7 +42,6 @@ go_library(
     ],
     importpath = "k8s.io/kubernetes/pkg/controller/nodeipam/ipam",
     deps = [
-        "//pkg/cloudprovider/providers/gce:go_default_library",
         "//pkg/controller:go_default_library",
         "//pkg/controller/nodeipam/ipam/cidrset:go_default_library",
         "//pkg/controller/nodeipam/ipam/sync:go_default_library",
@@ -67,6 +66,7 @@ go_library(
         "//staging/src/k8s.io/client-go/tools/cache:go_default_library",
         "//staging/src/k8s.io/client-go/tools/record:go_default_library",
         "//staging/src/k8s.io/cloud-provider:go_default_library",
+        "//staging/src/k8s.io/legacy-cloud-providers/gce:go_default_library",
         "//staging/src/k8s.io/metrics/pkg/client/clientset/versioned/scheme:go_default_library",
         "//vendor/k8s.io/klog:go_default_library",
     ],

pkg/controller/nodeipam/ipam/adapter.go

@@ -29,8 +29,8 @@ import (
 	clientset "k8s.io/client-go/kubernetes"
 	v1core "k8s.io/client-go/kubernetes/typed/core/v1"
 	"k8s.io/client-go/tools/record"
-	"k8s.io/kubernetes/pkg/cloudprovider/providers/gce"
 	nodeutil "k8s.io/kubernetes/pkg/util/node"
+	"k8s.io/legacy-cloud-providers/gce"
 	"k8s.io/metrics/pkg/client/clientset/versioned/scheme"
 )
 

pkg/controller/nodeipam/ipam/cloud_cidr_allocator.go

@@ -39,12 +39,12 @@ import (
 	"k8s.io/client-go/kubernetes/scheme"
 	v1core "k8s.io/client-go/kubernetes/typed/core/v1"
 	cloudprovider "k8s.io/cloud-provider"
-	"k8s.io/kubernetes/pkg/cloudprovider/providers/gce"
 	"k8s.io/kubernetes/pkg/controller"
 	nodeutil "k8s.io/kubernetes/pkg/controller/util/node"
 	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
 	utilnode "k8s.io/kubernetes/pkg/util/node"
 	utiltaints "k8s.io/kubernetes/pkg/util/taints"
+	"k8s.io/legacy-cloud-providers/gce"
 )
 
 // nodeProcessingInfo tracks information related to current nodes in processing

pkg/controller/nodeipam/ipam/controller.go

@@ -29,10 +29,10 @@ import (
 	clientset "k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/tools/cache"
 	cloudprovider "k8s.io/cloud-provider"
-	"k8s.io/kubernetes/pkg/cloudprovider/providers/gce"
 	"k8s.io/kubernetes/pkg/controller/nodeipam/ipam/cidrset"
 	nodesync "k8s.io/kubernetes/pkg/controller/nodeipam/ipam/sync"
 	nodeutil "k8s.io/kubernetes/pkg/controller/util/node"
+	"k8s.io/legacy-cloud-providers/gce"
 )
 
 // Config for the IPAM controller.

pkg/controller/nodeipam/node_ipam_controller_test.go

@@ -26,10 +26,10 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes/fake"
-	"k8s.io/kubernetes/pkg/cloudprovider/providers/gce"
 	"k8s.io/kubernetes/pkg/controller"
 	"k8s.io/kubernetes/pkg/controller/nodeipam/ipam"
 	"k8s.io/kubernetes/pkg/controller/testutil"
+	"k8s.io/legacy-cloud-providers/gce"
 )
 
 func newTestNodeIpamController(clusterCIDR, serviceCIDR *net.IPNet, nodeCIDRMaskSize int, allocatorType ipam.CIDRAllocatorType) (*Controller, error) {

pkg/volume/gcepd/BUILD

@@ -17,7 +17,6 @@ go_library(
     ],
     importpath = "k8s.io/kubernetes/pkg/volume/gcepd",
     deps = [
-        "//pkg/cloudprovider/providers/gce:go_default_library",
         "//pkg/features:go_default_library",
         "//pkg/util/mount:go_default_library",
         "//pkg/volume:go_default_library",
@@ -32,6 +31,7 @@ go_library(
         "//staging/src/k8s.io/cloud-provider:go_default_library",
         "//staging/src/k8s.io/cloud-provider/volume:go_default_library",
         "//staging/src/k8s.io/cloud-provider/volume/helpers:go_default_library",
+        "//staging/src/k8s.io/legacy-cloud-providers/gce:go_default_library",
         "//vendor/k8s.io/klog:go_default_library",
         "//vendor/k8s.io/utils/exec:go_default_library",
         "//vendor/k8s.io/utils/path:go_default_library",