OpenStack: enable cluster state deletion

Stub out a list resources method and call it from the collector
so that cluster state can be deleted via the API.

hack/.packages

@@ -116,6 +116,7 @@ k8s.io/kops/pkg/resources/aws
 k8s.io/kops/pkg/resources/digitalocean
 k8s.io/kops/pkg/resources/digitalocean/dns
 k8s.io/kops/pkg/resources/gce
+k8s.io/kops/pkg/resources/openstack
 k8s.io/kops/pkg/resources/ops
 k8s.io/kops/pkg/sshcredentials
 k8s.io/kops/pkg/systemd

pkg/resources/openstack/BUILD.bazel

@@ -0,0 +1,12 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["resources.go"],
+    importpath = "k8s.io/kops/pkg/resources/openstack",
+    visibility = ["//visibility:public"],
+    deps = [
+        "//pkg/resources:go_default_library",
+        "//upup/pkg/fi/cloudup/openstack:go_default_library",
+    ],
+)

pkg/resources/openstack/resources.go

@@ -0,0 +1,32 @@
+/*
+Copyright 2018 The Kubernetes Authors.
+
+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 openstack
+
+import (
+	"k8s.io/kops/pkg/resources"
+	"k8s.io/kops/upup/pkg/fi/cloudup/openstack"
+)
+
+type listFn func(openstack.OpenstackCloud, string) ([]*resources.Resource, error)
+
+func ListResources(cloud openstack.OpenstackCloud, clusterName string) (map[string]*resources.Resource, error) {
+	resourceTrackers := make(map[string]*resources.Resource)
+
+	// TODO(lmb): Implement resource list
+
+	return resourceTrackers, nil
+}

pkg/resources/ops/BUILD.bazel

@@ -14,9 +14,11 @@ go_library(
         "//pkg/resources/aws:go_default_library",
         "//pkg/resources/digitalocean:go_default_library",
         "//pkg/resources/gce:go_default_library",
+        "//pkg/resources/openstack:go_default_library",
         "//upup/pkg/fi:go_default_library",
         "//upup/pkg/fi/cloudup/awsup:go_default_library",
         "//upup/pkg/fi/cloudup/gce:go_default_library",
+        "//upup/pkg/fi/cloudup/openstack:go_default_library",
         "//upup/pkg/fi/cloudup/vsphere:go_default_library",
         "//vendor/github.com/golang/glog:go_default_library",
     ],

pkg/resources/ops/collector.go

@@ -24,9 +24,11 @@ import (
 	"k8s.io/kops/pkg/resources/aws"
 	"k8s.io/kops/pkg/resources/digitalocean"
 	"k8s.io/kops/pkg/resources/gce"
+	"k8s.io/kops/pkg/resources/openstack"
 	"k8s.io/kops/upup/pkg/fi"
 	"k8s.io/kops/upup/pkg/fi/cloudup/awsup"
 	cloudgce "k8s.io/kops/upup/pkg/fi/cloudup/gce"
+	cloudopenstack "k8s.io/kops/upup/pkg/fi/cloudup/openstack"
 	"k8s.io/kops/upup/pkg/fi/cloudup/vsphere"
 )
 
@@ -39,6 +41,8 @@ func ListResources(cloud fi.Cloud, clusterName string, region string) (map[strin
 		return digitalocean.ListResources(cloud.(*digitalocean.Cloud), clusterName)
 	case kops.CloudProviderGCE:
 		return gce.ListResourcesGCE(cloud.(cloudgce.GCECloud), clusterName, region)
+	case kops.CloudProviderOpenstack:
+		return openstack.ListResources(cloud.(cloudopenstack.OpenstackCloud), clusterName)
 	case kops.CloudProviderVSphere:
 		return resources.ListResourcesVSphere(cloud.(*vsphere.VSphereCloud), clusterName)
 	default: