Add generated file

This PR adds generated files under pkg/client and vendor folder.

vendor/k8s.io/kubernetes/pkg/cloudprovider/providers/cloudstack/BUILD

@@ -0,0 +1,122 @@
+package(default_visibility = ["//visibility:public"])
+
+load(
+    "@io_bazel_rules_go//go:def.bzl",
+    "go_library",
+    "go_test",
+)
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "cloudstack.go",
+        "cloudstack_instances.go",
+        "cloudstack_loadbalancer.go",
+        "metadata.go",
+    ] + select({
+        "@io_bazel_rules_go//go/platform:android": [
+            "metadata_other.go",
+        ],
+        "@io_bazel_rules_go//go/platform:darwin": [
+            "metadata_other.go",
+        ],
+        "@io_bazel_rules_go//go/platform:dragonfly": [
+            "metadata_other.go",
+        ],
+        "@io_bazel_rules_go//go/platform:freebsd": [
+            "metadata_other.go",
+        ],
+        "@io_bazel_rules_go//go/platform:linux": [
+            "metadata_linux.go",
+        ],
+        "@io_bazel_rules_go//go/platform:nacl": [
+            "metadata_other.go",
+        ],
+        "@io_bazel_rules_go//go/platform:netbsd": [
+            "metadata_other.go",
+        ],
+        "@io_bazel_rules_go//go/platform:openbsd": [
+            "metadata_other.go",
+        ],
+        "@io_bazel_rules_go//go/platform:plan9": [
+            "metadata_other.go",
+        ],
+        "@io_bazel_rules_go//go/platform:solaris": [
+            "metadata_other.go",
+        ],
+        "@io_bazel_rules_go//go/platform:windows": [
+            "metadata_other.go",
+        ],
+        "//conditions:default": [],
+    }),
+    importpath = "k8s.io/kubernetes/pkg/cloudprovider/providers/cloudstack",
+    deps = [
+        "//pkg/cloudprovider:go_default_library",
+        "//pkg/controller:go_default_library",
+        "//vendor/github.com/d2g/dhcp4:go_default_library",
+        "//vendor/github.com/golang/glog:go_default_library",
+        "//vendor/github.com/kardianos/osext:go_default_library",
+        "//vendor/github.com/xanzy/go-cloudstack/cloudstack:go_default_library",
+        "//vendor/gopkg.in/gcfg.v1:go_default_library",
+        "//vendor/k8s.io/api/core/v1:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/types:go_default_library",
+    ] + select({
+        "@io_bazel_rules_go//go/platform:android": [
+            "//vendor/github.com/d2g/dhcp4client:go_default_library",
+        ],
+        "@io_bazel_rules_go//go/platform:darwin": [
+            "//vendor/github.com/d2g/dhcp4client:go_default_library",
+        ],
+        "@io_bazel_rules_go//go/platform:dragonfly": [
+            "//vendor/github.com/d2g/dhcp4client:go_default_library",
+        ],
+        "@io_bazel_rules_go//go/platform:freebsd": [
+            "//vendor/github.com/d2g/dhcp4client:go_default_library",
+        ],
+        "@io_bazel_rules_go//go/platform:linux": [
+            "//vendor/github.com/d2g/dhcp4client:go_default_library",
+        ],
+        "@io_bazel_rules_go//go/platform:nacl": [
+            "//vendor/github.com/d2g/dhcp4client:go_default_library",
+        ],
+        "@io_bazel_rules_go//go/platform:netbsd": [
+            "//vendor/github.com/d2g/dhcp4client:go_default_library",
+        ],
+        "@io_bazel_rules_go//go/platform:openbsd": [
+            "//vendor/github.com/d2g/dhcp4client:go_default_library",
+        ],
+        "@io_bazel_rules_go//go/platform:plan9": [
+            "//vendor/github.com/d2g/dhcp4client:go_default_library",
+        ],
+        "@io_bazel_rules_go//go/platform:solaris": [
+            "//vendor/github.com/d2g/dhcp4client:go_default_library",
+        ],
+        "@io_bazel_rules_go//go/platform:windows": [
+            "//vendor/github.com/d2g/dhcp4client:go_default_library",
+        ],
+        "//conditions:default": [],
+    }),
+)
+
+go_test(
+    name = "go_default_test",
+    srcs = ["cloudstack_test.go"],
+    embed = [":go_default_library"],
+    deps = [
+        "//vendor/k8s.io/api/core/v1:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
+    ],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+)

vendor/k8s.io/kubernetes/pkg/cloudprovider/providers/cloudstack/OWNERS

@@ -0,0 +1,4 @@
+approvers:
+- ngtuna
+- sebgoa
+- svanharmelen

vendor/k8s.io/kubernetes/pkg/cloudprovider/providers/cloudstack/cloudstack.go

@@ -0,0 +1,260 @@
+/*
+Copyright 2016 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 cloudstack
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+
+	"github.com/golang/glog"
+	"github.com/kardianos/osext"
+	"github.com/xanzy/go-cloudstack/cloudstack"
+	"gopkg.in/gcfg.v1"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/kubernetes/pkg/cloudprovider"
+	"k8s.io/kubernetes/pkg/controller"
+)
+
+// ProviderName is the name of this cloud provider.
+const ProviderName = "cloudstack"
+
+// CSConfig wraps the config for the CloudStack cloud provider.
+type CSConfig struct {
+	Global struct {
+		APIURL      string `gcfg:"api-url"`
+		APIKey      string `gcfg:"api-key"`
+		SecretKey   string `gcfg:"secret-key"`
+		SSLNoVerify bool   `gcfg:"ssl-no-verify"`
+		ProjectID   string `gcfg:"project-id"`
+		Zone        string `gcfg:"zone"`
+	}
+}
+
+// CSCloud is an implementation of Interface for CloudStack.
+type CSCloud struct {
+	client    *cloudstack.CloudStackClient
+	metadata  *metadata
+	projectID string // If non-"", all resources will be created within this project
+	zone      string
+}
+
+func init() {
+	cloudprovider.RegisterCloudProvider(ProviderName, func(config io.Reader) (cloudprovider.Interface, error) {
+		cfg, err := readConfig(config)
+		if err != nil {
+			return nil, err
+		}
+
+		return newCSCloud(cfg)
+	})
+}
+
+func readConfig(config io.Reader) (*CSConfig, error) {
+	cfg := &CSConfig{}
+
+	if config == nil {
+		return cfg, nil
+	}
+
+	if err := gcfg.ReadInto(cfg, config); err != nil {
+		return nil, fmt.Errorf("could not parse cloud provider config: %v", err)
+	}
+
+	return cfg, nil
+}
+
+// newCSCloud creates a new instance of CSCloud.
+func newCSCloud(cfg *CSConfig) (*CSCloud, error) {
+	cs := &CSCloud{
+		projectID: cfg.Global.ProjectID,
+		zone:      cfg.Global.Zone,
+	}
+
+	exe, err := osext.Executable()
+	if err != nil {
+		return nil, fmt.Errorf("cloud not find the service executable: %v", err)
+	}
+
+	// When running the kubelet service it's fine to not specify a config file (or only a
+	// partial config file) as all needed info can be retrieved anonymously using metadata.
+	if filepath.Base(exe) == "kubelet" || filepath.Base(exe) == "kubelet.exe" {
+		// In CloudStack your metadata is always served by the DHCP server.
+		dhcpServer, err := findDHCPServer()
+		if err == nil {
+			glog.V(4).Infof("Found metadata server: %v", dhcpServer)
+			cs.metadata = &metadata{dhcpServer: dhcpServer, zone: cs.zone}
+		} else {
+			glog.Errorf("Error searching metadata server: %v", err)
+		}
+	}
+
+	if cfg.Global.APIURL != "" && cfg.Global.APIKey != "" && cfg.Global.SecretKey != "" {
+		cs.client = cloudstack.NewAsyncClient(cfg.Global.APIURL, cfg.Global.APIKey, cfg.Global.SecretKey, !cfg.Global.SSLNoVerify)
+	}
+
+	if cs.client == nil {
+		if cs.metadata != nil {
+			glog.V(2).Infof("No API URL, key and secret are provided, so only using metadata!")
+		} else {
+			return nil, errors.New("no cloud provider config given")
+		}
+	}
+
+	return cs, nil
+}
+
+// Initialize passes a Kubernetes clientBuilder interface to the cloud provider
+func (cs *CSCloud) Initialize(clientBuilder controller.ControllerClientBuilder) {}
+
+// LoadBalancer returns an implementation of LoadBalancer for CloudStack.
+func (cs *CSCloud) LoadBalancer() (cloudprovider.LoadBalancer, bool) {
+	if cs.client == nil {
+		return nil, false
+	}
+
+	return cs, true
+}
+
+// Instances returns an implementation of Instances for CloudStack.
+func (cs *CSCloud) Instances() (cloudprovider.Instances, bool) {
+	if cs.metadata != nil {
+		return cs.metadata, true
+	}
+
+	if cs.client == nil {
+		return nil, false
+	}
+
+	return cs, true
+}
+
+// Zones returns an implementation of Zones for CloudStack.
+func (cs *CSCloud) Zones() (cloudprovider.Zones, bool) {
+	if cs.metadata != nil {
+		return cs.metadata, true
+	}
+
+	if cs.client == nil {
+		return nil, false
+	}
+
+	return cs, true
+}
+
+// Clusters returns an implementation of Clusters for CloudStack.
+func (cs *CSCloud) Clusters() (cloudprovider.Clusters, bool) {
+	if cs.client == nil {
+		return nil, false
+	}
+
+	return nil, false
+}
+
+// Routes returns an implementation of Routes for CloudStack.
+func (cs *CSCloud) Routes() (cloudprovider.Routes, bool) {
+	if cs.client == nil {
+		return nil, false
+	}
+
+	return nil, false
+}
+
+// ProviderName returns the cloud provider ID.
+func (cs *CSCloud) ProviderName() string {
+	return ProviderName
+}
+
+// HasClusterID returns true if the cluster has a clusterID
+func (cs *CSCloud) HasClusterID() bool {
+	return true
+}
+
+// GetZone returns the Zone containing the region that the program is running in.
+func (cs *CSCloud) GetZone(ctx context.Context) (cloudprovider.Zone, error) {
+	zone := cloudprovider.Zone{}
+
+	if cs.zone == "" {
+		hostname, err := os.Hostname()
+		if err != nil {
+			return zone, fmt.Errorf("failed to get hostname for retrieving the zone: %v", err)
+		}
+
+		instance, count, err := cs.client.VirtualMachine.GetVirtualMachineByName(hostname)
+		if err != nil {
+			if count == 0 {
+				return zone, fmt.Errorf("could not find instance for retrieving the zone: %v", err)
+			}
+			return zone, fmt.Errorf("error getting instance for retrieving the zone: %v", err)
+		}
+
+		cs.zone = instance.Zonename
+	}
+
+	glog.V(2).Infof("Current zone is %v", cs.zone)
+	zone.FailureDomain = cs.zone
+	zone.Region = cs.zone
+
+	return zone, nil
+}
+
+// GetZoneByProviderID returns the Zone, found by using the provider ID.
+func (cs *CSCloud) GetZoneByProviderID(ctx context.Context, providerID string) (cloudprovider.Zone, error) {
+	zone := cloudprovider.Zone{}
+
+	instance, count, err := cs.client.VirtualMachine.GetVirtualMachineByID(
+		providerID,
+		cloudstack.WithProject(cs.projectID),
+	)
+	if err != nil {
+		if count == 0 {
+			return zone, fmt.Errorf("could not find node by ID: %v", providerID)
+		}
+		return zone, fmt.Errorf("error retrieving zone: %v", err)
+	}
+
+	glog.V(2).Infof("Current zone is %v", cs.zone)
+	zone.FailureDomain = instance.Zonename
+	zone.Region = instance.Zonename
+
+	return zone, nil
+}
+
+// GetZoneByNodeName returns the Zone, found by using the node name.
+func (cs *CSCloud) GetZoneByNodeName(ctx context.Context, nodeName types.NodeName) (cloudprovider.Zone, error) {
+	zone := cloudprovider.Zone{}
+
+	instance, count, err := cs.client.VirtualMachine.GetVirtualMachineByName(
+		string(nodeName),
+		cloudstack.WithProject(cs.projectID),
+	)
+	if err != nil {
+		if count == 0 {
+			return zone, fmt.Errorf("could not find node: %v", nodeName)
+		}
+		return zone, fmt.Errorf("error retrieving zone: %v", err)
+	}
+
+	glog.V(2).Infof("Current zone is %v", cs.zone)
+	zone.FailureDomain = instance.Zonename
+	zone.Region = instance.Zonename
+
+	return zone, nil
+}

vendor/k8s.io/kubernetes/pkg/cloudprovider/providers/cloudstack/cloudstack_instances.go

@@ -0,0 +1,160 @@
+/*
+Copyright 2016 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 cloudstack
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	"github.com/golang/glog"
+	"github.com/xanzy/go-cloudstack/cloudstack"
+	"k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/kubernetes/pkg/cloudprovider"
+)
+
+// NodeAddresses returns the addresses of the specified instance.
+func (cs *CSCloud) NodeAddresses(ctx context.Context, name types.NodeName) ([]v1.NodeAddress, error) {
+	instance, count, err := cs.client.VirtualMachine.GetVirtualMachineByName(
+		string(name),
+		cloudstack.WithProject(cs.projectID),
+	)
+	if err != nil {
+		if count == 0 {
+			return nil, cloudprovider.InstanceNotFound
+		}
+		return nil, fmt.Errorf("error retrieving node addresses: %v", err)
+	}
+
+	return cs.nodeAddresses(instance)
+}
+
+// NodeAddressesByProviderID returns the addresses of the specified instance.
+func (cs *CSCloud) NodeAddressesByProviderID(ctx context.Context, providerID string) ([]v1.NodeAddress, error) {
+	instance, count, err := cs.client.VirtualMachine.GetVirtualMachineByID(
+		providerID,
+		cloudstack.WithProject(cs.projectID),
+	)
+	if err != nil {
+		if count == 0 {
+			return nil, cloudprovider.InstanceNotFound
+		}
+		return nil, fmt.Errorf("error retrieving node addresses: %v", err)
+	}
+
+	return cs.nodeAddresses(instance)
+}
+
+func (cs *CSCloud) nodeAddresses(instance *cloudstack.VirtualMachine) ([]v1.NodeAddress, error) {
+	if len(instance.Nic) == 0 {
+		return nil, errors.New("instance does not have an internal IP")
+	}
+
+	addresses := []v1.NodeAddress{
+		{Type: v1.NodeInternalIP, Address: instance.Nic[0].Ipaddress},
+	}
+
+	if instance.Publicip != "" {
+		addresses = append(addresses, v1.NodeAddress{Type: v1.NodeExternalIP, Address: instance.Publicip})
+	} else {
+		// Since there is no sane way to determine the external IP if the host isn't
+		// using static NAT, we will just fire a log message and omit the external IP.
+		glog.V(4).Infof("Could not determine the public IP of host %v (%v)", instance.Name, instance.Id)
+	}
+
+	return addresses, nil
+}
+
+// InstanceID returns the cloud provider ID of the specified instance.
+func (cs *CSCloud) InstanceID(ctx context.Context, name types.NodeName) (string, error) {
+	instance, count, err := cs.client.VirtualMachine.GetVirtualMachineByName(
+		string(name),
+		cloudstack.WithProject(cs.projectID),
+	)
+	if err != nil {
+		if count == 0 {
+			return "", cloudprovider.InstanceNotFound
+		}
+		return "", fmt.Errorf("error retrieving instance ID: %v", err)
+	}
+
+	return instance.Id, nil
+}
+
+// InstanceType returns the type of the specified instance.
+func (cs *CSCloud) InstanceType(ctx context.Context, name types.NodeName) (string, error) {
+	instance, count, err := cs.client.VirtualMachine.GetVirtualMachineByName(
+		string(name),
+		cloudstack.WithProject(cs.projectID),
+	)
+	if err != nil {
+		if count == 0 {
+			return "", cloudprovider.InstanceNotFound
+		}
+		return "", fmt.Errorf("error retrieving instance type: %v", err)
+	}
+
+	return instance.Serviceofferingname, nil
+}
+
+// InstanceTypeByProviderID returns the type of the specified instance.
+func (cs *CSCloud) InstanceTypeByProviderID(ctx context.Context, providerID string) (string, error) {
+	instance, count, err := cs.client.VirtualMachine.GetVirtualMachineByID(
+		providerID,
+		cloudstack.WithProject(cs.projectID),
+	)
+	if err != nil {
+		if count == 0 {
+			return "", cloudprovider.InstanceNotFound
+		}
+		return "", fmt.Errorf("error retrieving instance type: %v", err)
+	}
+
+	return instance.Serviceofferingname, nil
+}
+
+// AddSSHKeyToAllInstances is currently not implemented.
+func (cs *CSCloud) AddSSHKeyToAllInstances(ctx context.Context, user string, keyData []byte) error {
+	return cloudprovider.NotImplemented
+}
+
+// CurrentNodeName returns the name of the node we are currently running on.
+func (cs *CSCloud) CurrentNodeName(ctx context.Context, hostname string) (types.NodeName, error) {
+	return types.NodeName(hostname), nil
+}
+
+// InstanceExistsByProviderID returns if the instance still exists.
+func (cs *CSCloud) InstanceExistsByProviderID(ctx context.Context, providerID string) (bool, error) {
+	_, count, err := cs.client.VirtualMachine.GetVirtualMachineByID(
+		providerID,
+		cloudstack.WithProject(cs.projectID),
+	)
+	if err != nil {
+		if count == 0 {
+			return false, nil
+		}
+		return false, fmt.Errorf("error retrieving instance: %v", err)
+	}
+
+	return true, nil
+}
+
+// InstanceShutdownByProviderID returns true if the instance is in safe state to detach volumes
+func (cs *CSCloud) InstanceShutdownByProviderID(ctx context.Context, providerID string) (bool, error) {
+	return false, cloudprovider.NotImplemented
+}

vendor/k8s.io/kubernetes/pkg/cloudprovider/providers/cloudstack/cloudstack_loadbalancer.go

@@ -0,0 +1,543 @@
+/*
+Copyright 2016 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 cloudstack
+
+import (
+	"context"
+	"fmt"
+	"strconv"
+
+	"github.com/golang/glog"
+	"github.com/xanzy/go-cloudstack/cloudstack"
+	"k8s.io/api/core/v1"
+	"k8s.io/kubernetes/pkg/cloudprovider"
+)
+
+type loadBalancer struct {
+	*cloudstack.CloudStackClient
+
+	name      string
+	algorithm string
+	hostIDs   []string
+	ipAddr    string
+	ipAddrID  string
+	networkID string
+	projectID string
+	rules     map[string]*cloudstack.LoadBalancerRule
+}
+
+// GetLoadBalancer returns whether the specified load balancer exists, and if so, what its status is.
+func (cs *CSCloud) GetLoadBalancer(ctx context.Context, clusterName string, service *v1.Service) (*v1.LoadBalancerStatus, bool, error) {
+	glog.V(4).Infof("GetLoadBalancer(%v, %v, %v)", clusterName, service.Namespace, service.Name)
+
+	// Get the load balancer details and existing rules.
+	lb, err := cs.getLoadBalancer(service)
+	if err != nil {
+		return nil, false, err
+	}
+
+	// If we don't have any rules, the load balancer does not exist.
+	if len(lb.rules) == 0 {
+		return nil, false, nil
+	}
+
+	glog.V(4).Infof("Found a load balancer associated with IP %v", lb.ipAddr)
+
+	status := &v1.LoadBalancerStatus{}
+	status.Ingress = append(status.Ingress, v1.LoadBalancerIngress{IP: lb.ipAddr})
+
+	return status, true, nil
+}
+
+// EnsureLoadBalancer creates a new load balancer, or updates the existing one. Returns the status of the balancer.
+func (cs *CSCloud) EnsureLoadBalancer(ctx context.Context, clusterName string, service *v1.Service, nodes []*v1.Node) (status *v1.LoadBalancerStatus, err error) {
+	glog.V(4).Infof("EnsureLoadBalancer(%v, %v, %v, %v, %v, %v)", clusterName, service.Namespace, service.Name, service.Spec.LoadBalancerIP, service.Spec.Ports, nodes)
+
+	if len(service.Spec.Ports) == 0 {
+		return nil, fmt.Errorf("requested load balancer with no ports")
+	}
+
+	// Get the load balancer details and existing rules.
+	lb, err := cs.getLoadBalancer(service)
+	if err != nil {
+		return nil, err
+	}
+
+	// Set the load balancer algorithm.
+	switch service.Spec.SessionAffinity {
+	case v1.ServiceAffinityNone:
+		lb.algorithm = "roundrobin"
+	case v1.ServiceAffinityClientIP:
+		lb.algorithm = "source"
+	default:
+		return nil, fmt.Errorf("unsupported load balancer affinity: %v", service.Spec.SessionAffinity)
+	}
+
+	// Verify that all the hosts belong to the same network, and retrieve their ID's.
+	lb.hostIDs, lb.networkID, err = cs.verifyHosts(nodes)
+	if err != nil {
+		return nil, err
+	}
+
+	if !lb.hasLoadBalancerIP() {
+		// Create or retrieve the load balancer IP.
+		if err := lb.getLoadBalancerIP(service.Spec.LoadBalancerIP); err != nil {
+			return nil, err
+		}
+
+		if lb.ipAddr != "" && lb.ipAddr != service.Spec.LoadBalancerIP {
+			defer func(lb *loadBalancer) {
+				if err != nil {
+					if err := lb.releaseLoadBalancerIP(); err != nil {
+						glog.Errorf(err.Error())
+					}
+				}
+			}(lb)
+		}
+	}
+
+	glog.V(4).Infof("Load balancer %v is associated with IP %v", lb.name, lb.ipAddr)
+
+	for _, port := range service.Spec.Ports {
+		// All ports have their own load balancer rule, so add the port to lbName to keep the names unique.
+		lbRuleName := fmt.Sprintf("%s-%d", lb.name, port.Port)
+
+		// If the load balancer rule exists and is up-to-date, we move on to the next rule.
+		exists, needsUpdate, err := lb.checkLoadBalancerRule(lbRuleName, port)
+		if err != nil {
+			return nil, err
+		}
+		if exists && !needsUpdate {
+			glog.V(4).Infof("Load balancer rule %v is up-to-date", lbRuleName)
+			// Delete the rule from the map, to prevent it being deleted.
+			delete(lb.rules, lbRuleName)
+			continue
+		}
+
+		if needsUpdate {
+			glog.V(4).Infof("Updating load balancer rule: %v", lbRuleName)
+			if err := lb.updateLoadBalancerRule(lbRuleName); err != nil {
+				return nil, err
+			}
+			// Delete the rule from the map, to prevent it being deleted.
+			delete(lb.rules, lbRuleName)
+			continue
+		}
+
+		glog.V(4).Infof("Creating load balancer rule: %v", lbRuleName)
+		lbRule, err := lb.createLoadBalancerRule(lbRuleName, port)
+		if err != nil {
+			return nil, err
+		}
+
+		glog.V(4).Infof("Assigning hosts (%v) to load balancer rule: %v", lb.hostIDs, lbRuleName)
+		if err = lb.assignHostsToRule(lbRule, lb.hostIDs); err != nil {
+			return nil, err
+		}
+
+	}
+
+	// Cleanup any rules that are now still in the rules map, as they are no longer needed.
+	for _, lbRule := range lb.rules {
+		glog.V(4).Infof("Deleting obsolete load balancer rule: %v", lbRule.Name)
+		if err := lb.deleteLoadBalancerRule(lbRule); err != nil {
+			return nil, err
+		}
+	}
+
+	status = &v1.LoadBalancerStatus{}
+	status.Ingress = []v1.LoadBalancerIngress{{IP: lb.ipAddr}}
+
+	return status, nil
+}
+
+// UpdateLoadBalancer updates hosts under the specified load balancer.
+func (cs *CSCloud) UpdateLoadBalancer(ctx context.Context, clusterName string, service *v1.Service, nodes []*v1.Node) error {
+	glog.V(4).Infof("UpdateLoadBalancer(%v, %v, %v, %v)", clusterName, service.Namespace, service.Name, nodes)
+
+	// Get the load balancer details and existing rules.
+	lb, err := cs.getLoadBalancer(service)
+	if err != nil {
+		return err
+	}
+
+	// Verify that all the hosts belong to the same network, and retrieve their ID's.
+	lb.hostIDs, _, err = cs.verifyHosts(nodes)
+	if err != nil {
+		return err
+	}
+
+	for _, lbRule := range lb.rules {
+		p := lb.LoadBalancer.NewListLoadBalancerRuleInstancesParams(lbRule.Id)
+
+		// Retrieve all VMs currently associated to this load balancer rule.
+		l, err := lb.LoadBalancer.ListLoadBalancerRuleInstances(p)
+		if err != nil {
+			return fmt.Errorf("error retrieving associated instances: %v", err)
+		}
+
+		assign, remove := symmetricDifference(lb.hostIDs, l.LoadBalancerRuleInstances)
+
+		if len(assign) > 0 {
+			glog.V(4).Infof("Assigning new hosts (%v) to load balancer rule: %v", assign, lbRule.Name)
+			if err := lb.assignHostsToRule(lbRule, assign); err != nil {
+				return err
+			}
+		}
+
+		if len(remove) > 0 {
+			glog.V(4).Infof("Removing old hosts (%v) from load balancer rule: %v", assign, lbRule.Name)
+			if err := lb.removeHostsFromRule(lbRule, remove); err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}
+
+// EnsureLoadBalancerDeleted deletes the specified load balancer if it exists, returning
+// nil if the load balancer specified either didn't exist or was successfully deleted.
+func (cs *CSCloud) EnsureLoadBalancerDeleted(ctx context.Context, clusterName string, service *v1.Service) error {
+	glog.V(4).Infof("EnsureLoadBalancerDeleted(%v, %v, %v)", clusterName, service.Namespace, service.Name)
+
+	// Get the load balancer details and existing rules.
+	lb, err := cs.getLoadBalancer(service)
+	if err != nil {
+		return err
+	}
+
+	for _, lbRule := range lb.rules {
+		glog.V(4).Infof("Deleting load balancer rule: %v", lbRule.Name)
+		if err := lb.deleteLoadBalancerRule(lbRule); err != nil {
+			return err
+		}
+	}
+
+	if lb.ipAddr != "" && lb.ipAddr != service.Spec.LoadBalancerIP {
+		glog.V(4).Infof("Releasing load balancer IP: %v", lb.ipAddr)
+		if err := lb.releaseLoadBalancerIP(); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+// getLoadBalancer retrieves the IP address and ID and all the existing rules it can find.
+func (cs *CSCloud) getLoadBalancer(service *v1.Service) (*loadBalancer, error) {
+	lb := &loadBalancer{
+		CloudStackClient: cs.client,
+		name:             cloudprovider.GetLoadBalancerName(service),
+		projectID:        cs.projectID,
+		rules:            make(map[string]*cloudstack.LoadBalancerRule),
+	}
+
+	p := cs.client.LoadBalancer.NewListLoadBalancerRulesParams()
+	p.SetKeyword(lb.name)
+	p.SetListall(true)
+
+	if cs.projectID != "" {
+		p.SetProjectid(cs.projectID)
+	}
+
+	l, err := cs.client.LoadBalancer.ListLoadBalancerRules(p)
+	if err != nil {
+		return nil, fmt.Errorf("error retrieving load balancer rules: %v", err)
+	}
+
+	for _, lbRule := range l.LoadBalancerRules {
+		lb.rules[lbRule.Name] = lbRule
+
+		if lb.ipAddr != "" && lb.ipAddr != lbRule.Publicip {
+			glog.Warningf("Load balancer for service %v/%v has rules associated with different IP's: %v, %v", service.Namespace, service.Name, lb.ipAddr, lbRule.Publicip)
+		}
+
+		lb.ipAddr = lbRule.Publicip
+		lb.ipAddrID = lbRule.Publicipid
+	}
+
+	glog.V(4).Infof("Load balancer %v contains %d rule(s)", lb.name, len(lb.rules))
+
+	return lb, nil
+}
+
+// verifyHosts verifies if all hosts belong to the same network, and returns the host ID's and network ID.
+func (cs *CSCloud) verifyHosts(nodes []*v1.Node) ([]string, string, error) {
+	hostNames := map[string]bool{}
+	for _, node := range nodes {
+		hostNames[node.Name] = true
+	}
+
+	p := cs.client.VirtualMachine.NewListVirtualMachinesParams()
+	p.SetListall(true)
+
+	if cs.projectID != "" {
+		p.SetProjectid(cs.projectID)
+	}
+
+	l, err := cs.client.VirtualMachine.ListVirtualMachines(p)
+	if err != nil {
+		return nil, "", fmt.Errorf("error retrieving list of hosts: %v", err)
+	}
+
+	var hostIDs []string
+	var networkID string
+
+	// Check if the virtual machine is in the hosts slice, then add the corresponding ID.
+	for _, vm := range l.VirtualMachines {
+		if hostNames[vm.Name] {
+			if networkID != "" && networkID != vm.Nic[0].Networkid {
+				return nil, "", fmt.Errorf("found hosts that belong to different networks")
+			}
+
+			networkID = vm.Nic[0].Networkid
+			hostIDs = append(hostIDs, vm.Id)
+		}
+	}
+
+	return hostIDs, networkID, nil
+}
+
+// hasLoadBalancerIP returns true if we have a load balancer address and ID.
+func (lb *loadBalancer) hasLoadBalancerIP() bool {
+	return lb.ipAddr != "" && lb.ipAddrID != ""
+}
+
+// getLoadBalancerIP retieves an existing IP or associates a new IP.
+func (lb *loadBalancer) getLoadBalancerIP(loadBalancerIP string) error {
+	if loadBalancerIP != "" {
+		return lb.getPublicIPAddress(loadBalancerIP)
+	}
+
+	return lb.associatePublicIPAddress()
+}
+
+// getPublicIPAddressID retrieves the ID of the given IP, and sets the address and it's ID.
+func (lb *loadBalancer) getPublicIPAddress(loadBalancerIP string) error {
+	glog.V(4).Infof("Retrieve load balancer IP details: %v", loadBalancerIP)
+
+	p := lb.Address.NewListPublicIpAddressesParams()
+	p.SetIpaddress(loadBalancerIP)
+	p.SetListall(true)
+
+	if lb.projectID != "" {
+		p.SetProjectid(lb.projectID)
+	}
+
+	l, err := lb.Address.ListPublicIpAddresses(p)
+	if err != nil {
+		return fmt.Errorf("error retrieving IP address: %v", err)
+	}
+
+	if l.Count != 1 {
+		return fmt.Errorf("could not find IP address %v", loadBalancerIP)
+	}
+
+	lb.ipAddr = l.PublicIpAddresses[0].Ipaddress
+	lb.ipAddrID = l.PublicIpAddresses[0].Id
+
+	return nil
+}
+
+// associatePublicIPAddress associates a new IP and sets the address and it's ID.
+func (lb *loadBalancer) associatePublicIPAddress() error {
+	glog.V(4).Infof("Allocate new IP for load balancer: %v", lb.name)
+	// If a network belongs to a VPC, the IP address needs to be associated with
+	// the VPC instead of with the network.
+	network, count, err := lb.Network.GetNetworkByID(lb.networkID, cloudstack.WithProject(lb.projectID))
+	if err != nil {
+		if count == 0 {
+			return fmt.Errorf("could not find network %v", lb.networkID)
+		}
+		return fmt.Errorf("error retrieving network: %v", err)
+	}
+
+	p := lb.Address.NewAssociateIpAddressParams()
+
+	if network.Vpcid != "" {
+		p.SetVpcid(network.Vpcid)
+	} else {
+		p.SetNetworkid(lb.networkID)
+	}
+
+	if lb.projectID != "" {
+		p.SetProjectid(lb.projectID)
+	}
+
+	// Associate a new IP address
+	r, err := lb.Address.AssociateIpAddress(p)
+	if err != nil {
+		return fmt.Errorf("error associating new IP address: %v", err)
+	}
+
+	lb.ipAddr = r.Ipaddress
+	lb.ipAddrID = r.Id
+
+	return nil
+}
+
+// releasePublicIPAddress releases an associated IP.
+func (lb *loadBalancer) releaseLoadBalancerIP() error {
+	p := lb.Address.NewDisassociateIpAddressParams(lb.ipAddrID)
+
+	if _, err := lb.Address.DisassociateIpAddress(p); err != nil {
+		return fmt.Errorf("error releasing load balancer IP %v: %v", lb.ipAddr, err)
+	}
+
+	return nil
+}
+
+// checkLoadBalancerRule checks if the rule already exists and if it does, if it can be updated. If
+// it does exist but cannot be updated, it will delete the existing rule so it can be created again.
+func (lb *loadBalancer) checkLoadBalancerRule(lbRuleName string, port v1.ServicePort) (bool, bool, error) {
+	lbRule, ok := lb.rules[lbRuleName]
+	if !ok {
+		return false, false, nil
+	}
+
+	// Check if any of the values we cannot update (those that require a new load balancer rule) are changed.
+	if lbRule.Publicip == lb.ipAddr && lbRule.Privateport == strconv.Itoa(int(port.NodePort)) && lbRule.Publicport == strconv.Itoa(int(port.Port)) {
+		return true, lbRule.Algorithm != lb.algorithm, nil
+	}
+
+	// Delete the load balancer rule so we can create a new one using the new values.
+	if err := lb.deleteLoadBalancerRule(lbRule); err != nil {
+		return false, false, err
+	}
+
+	return false, false, nil
+}
+
+// updateLoadBalancerRule updates a load balancer rule.
+func (lb *loadBalancer) updateLoadBalancerRule(lbRuleName string) error {
+	lbRule := lb.rules[lbRuleName]
+
+	p := lb.LoadBalancer.NewUpdateLoadBalancerRuleParams(lbRule.Id)
+	p.SetAlgorithm(lb.algorithm)
+
+	_, err := lb.LoadBalancer.UpdateLoadBalancerRule(p)
+	return err
+}
+
+// createLoadBalancerRule creates a new load balancer rule and returns it's ID.
+func (lb *loadBalancer) createLoadBalancerRule(lbRuleName string, port v1.ServicePort) (*cloudstack.LoadBalancerRule, error) {
+	p := lb.LoadBalancer.NewCreateLoadBalancerRuleParams(
+		lb.algorithm,
+		lbRuleName,
+		int(port.NodePort),
+		int(port.Port),
+	)
+
+	p.SetNetworkid(lb.networkID)
+	p.SetPublicipid(lb.ipAddrID)
+
+	switch port.Protocol {
+	case v1.ProtocolTCP:
+		p.SetProtocol("TCP")
+	case v1.ProtocolUDP:
+		p.SetProtocol("UDP")
+	default:
+		return nil, fmt.Errorf("unsupported load balancer protocol: %v", port.Protocol)
+	}
+
+	// Do not create corresponding firewall rule.
+	p.SetOpenfirewall(false)
+
+	// Create a new load balancer rule.
+	r, err := lb.LoadBalancer.CreateLoadBalancerRule(p)
+	if err != nil {
+		return nil, fmt.Errorf("error creating load balancer rule %v: %v", lbRuleName, err)
+	}
+
+	lbRule := &cloudstack.LoadBalancerRule{
+		Id:          r.Id,
+		Algorithm:   r.Algorithm,
+		Cidrlist:    r.Cidrlist,
+		Name:        r.Name,
+		Networkid:   r.Networkid,
+		Privateport: r.Privateport,
+		Publicport:  r.Publicport,
+		Publicip:    r.Publicip,
+		Publicipid:  r.Publicipid,
+	}
+
+	return lbRule, nil
+}
+
+// deleteLoadBalancerRule deletes a load balancer rule.
+func (lb *loadBalancer) deleteLoadBalancerRule(lbRule *cloudstack.LoadBalancerRule) error {
+	p := lb.LoadBalancer.NewDeleteLoadBalancerRuleParams(lbRule.Id)
+
+	if _, err := lb.LoadBalancer.DeleteLoadBalancerRule(p); err != nil {
+		return fmt.Errorf("error deleting load balancer rule %v: %v", lbRule.Name, err)
+	}
+
+	// Delete the rule from the map as it no longer exists
+	delete(lb.rules, lbRule.Name)
+
+	return nil
+}
+
+// assignHostsToRule assigns hosts to a load balancer rule.
+func (lb *loadBalancer) assignHostsToRule(lbRule *cloudstack.LoadBalancerRule, hostIDs []string) error {
+	p := lb.LoadBalancer.NewAssignToLoadBalancerRuleParams(lbRule.Id)
+	p.SetVirtualmachineids(hostIDs)
+
+	if _, err := lb.LoadBalancer.AssignToLoadBalancerRule(p); err != nil {
+		return fmt.Errorf("error assigning hosts to load balancer rule %v: %v", lbRule.Name, err)
+	}
+
+	return nil
+}
+
+// removeHostsFromRule removes hosts from a load balancer rule.
+func (lb *loadBalancer) removeHostsFromRule(lbRule *cloudstack.LoadBalancerRule, hostIDs []string) error {
+	p := lb.LoadBalancer.NewRemoveFromLoadBalancerRuleParams(lbRule.Id)
+	p.SetVirtualmachineids(hostIDs)
+
+	if _, err := lb.LoadBalancer.RemoveFromLoadBalancerRule(p); err != nil {
+		return fmt.Errorf("error removing hosts from load balancer rule %v: %v", lbRule.Name, err)
+	}
+
+	return nil
+}
+
+// symmetricDifference returns the symmetric difference between the old (existing) and new (wanted) host ID's.
+func symmetricDifference(hostIDs []string, lbInstances []*cloudstack.VirtualMachine) ([]string, []string) {
+	new := make(map[string]bool)
+	for _, hostID := range hostIDs {
+		new[hostID] = true
+	}
+
+	var remove []string
+	for _, instance := range lbInstances {
+		if new[instance.Id] {
+			delete(new, instance.Id)
+			continue
+		}
+
+		remove = append(remove, instance.Id)
+	}
+
+	var assign []string
+	for hostID := range new {
+		assign = append(assign, hostID)
+	}
+
+	return assign, remove
+}

vendor/k8s.io/kubernetes/pkg/cloudprovider/providers/cloudstack/cloudstack_test.go

@@ -0,0 +1,118 @@
+/*
+Copyright 2016 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 cloudstack
+
+import (
+	"context"
+	"os"
+	"strconv"
+	"strings"
+	"testing"
+
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+const testClusterName = "testCluster"
+
+func TestReadConfig(t *testing.T) {
+	_, err := readConfig(nil)
+	if err != nil {
+		t.Fatalf("Should not return an error when no config is provided: %v", err)
+	}
+
+	cfg, err := readConfig(strings.NewReader(`
+ [Global]
+ api-url				= https://cloudstack.url
+ api-key				= a-valid-api-key
+ secret-key			= a-valid-secret-key
+ ssl-no-verify	= true
+ project-id			= a-valid-project-id
+ `))
+	if err != nil {
+		t.Fatalf("Should succeed when a valid config is provided: %v", err)
+	}
+
+	if cfg.Global.APIURL != "https://cloudstack.url" {
+		t.Errorf("incorrect api-url: %s", cfg.Global.APIURL)
+	}
+	if cfg.Global.APIKey != "a-valid-api-key" {
+		t.Errorf("incorrect api-key: %s", cfg.Global.APIKey)
+	}
+	if cfg.Global.SecretKey != "a-valid-secret-key" {
+		t.Errorf("incorrect secret-key: %s", cfg.Global.SecretKey)
+	}
+	if !cfg.Global.SSLNoVerify {
+		t.Errorf("incorrect ssl-no-verify: %t", cfg.Global.SSLNoVerify)
+	}
+}
+
+// This allows acceptance testing against an existing CloudStack environment.
+func configFromEnv() (*CSConfig, bool) {
+	cfg := &CSConfig{}
+
+	cfg.Global.APIURL = os.Getenv("CS_API_URL")
+	cfg.Global.APIKey = os.Getenv("CS_API_KEY")
+	cfg.Global.SecretKey = os.Getenv("CS_SECRET_KEY")
+	cfg.Global.ProjectID = os.Getenv("CS_PROJECT_ID")
+
+	// It is save to ignore the error here. If the input cannot be parsed SSLNoVerify
+	// will still be a bool with its zero value (false) which is the expected default.
+	cfg.Global.SSLNoVerify, _ = strconv.ParseBool(os.Getenv("CS_SSL_NO_VERIFY"))
+
+	// Check if we have the minimum required info to be able to connect to CloudStack.
+	ok := cfg.Global.APIURL != "" && cfg.Global.APIKey != "" && cfg.Global.SecretKey != ""
+
+	return cfg, ok
+}
+
+func TestNewCSCloud(t *testing.T) {
+	cfg, ok := configFromEnv()
+	if !ok {
+		t.Skipf("No config found in environment")
+	}
+
+	_, err := newCSCloud(cfg)
+	if err != nil {
+		t.Fatalf("Failed to construct/authenticate CloudStack: %v", err)
+	}
+}
+
+func TestLoadBalancer(t *testing.T) {
+	cfg, ok := configFromEnv()
+	if !ok {
+		t.Skipf("No config found in environment")
+	}
+
+	cs, err := newCSCloud(cfg)
+	if err != nil {
+		t.Fatalf("Failed to construct/authenticate CloudStack: %v", err)
+	}
+
+	lb, ok := cs.LoadBalancer()
+	if !ok {
+		t.Fatalf("LoadBalancer() returned false")
+	}
+
+	_, exists, err := lb.GetLoadBalancer(context.TODO(), testClusterName, &v1.Service{ObjectMeta: metav1.ObjectMeta{Name: "noexist"}})
+	if err != nil {
+		t.Fatalf("GetLoadBalancer(\"noexist\") returned error: %s", err)
+	}
+	if exists {
+		t.Fatalf("GetLoadBalancer(\"noexist\") returned exists")
+	}
+}

vendor/k8s.io/kubernetes/pkg/cloudprovider/providers/cloudstack/metadata.go

@@ -0,0 +1,212 @@
+/*
+Copyright 2016 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 cloudstack
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"net"
+	"net/http"
+
+	"github.com/d2g/dhcp4"
+	"github.com/golang/glog"
+	"k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/kubernetes/pkg/cloudprovider"
+)
+
+type metadata struct {
+	dhcpServer string
+	zone       string
+}
+
+type metadataType string
+
+const (
+	metadataTypeExternalIP   metadataType = "public-ipv4"
+	metadataTypeInternalIP   metadataType = "local-ipv4"
+	metadataTypeInstanceID   metadataType = "instance-id"
+	metadataTypeInstanceType metadataType = "service-offering"
+	metadataTypeZone         metadataType = "availability-zone"
+)
+
+// NodeAddresses returns the addresses of the specified instance.
+func (m *metadata) NodeAddresses(ctx context.Context, name types.NodeName) ([]v1.NodeAddress, error) {
+	externalIP, err := m.get(metadataTypeExternalIP)
+	if err != nil {
+		return nil, fmt.Errorf("could not get external IP: %v", err)
+	}
+
+	internalIP, err := m.get(metadataTypeInternalIP)
+	if err != nil {
+		return nil, fmt.Errorf("could not get internal IP: %v", err)
+	}
+
+	return []v1.NodeAddress{
+		{Type: v1.NodeExternalIP, Address: externalIP},
+		{Type: v1.NodeInternalIP, Address: internalIP},
+	}, nil
+}
+
+// NodeAddressesByProviderID returns the addresses of the specified instance.
+func (m *metadata) NodeAddressesByProviderID(ctx context.Context, providerID string) ([]v1.NodeAddress, error) {
+	return nil, errors.New("NodeAddressesByProviderID not implemented")
+}
+
+// InstanceID returns the cloud provider ID of the specified instance.
+func (m *metadata) InstanceID(ctx context.Context, name types.NodeName) (string, error) {
+	instanceID, err := m.get(metadataTypeInstanceID)
+	if err != nil {
+		return "", fmt.Errorf("could not get instance ID: %v", err)
+	}
+
+	zone, err := m.get(metadataTypeZone)
+	if err != nil {
+		return "", fmt.Errorf("could not get zone: %v", err)
+	}
+
+	return "/" + zone + "/" + instanceID, nil
+}
+
+// InstanceType returns the type of the specified instance.
+func (m *metadata) InstanceType(ctx context.Context, name types.NodeName) (string, error) {
+	instanceType, err := m.get(metadataTypeInstanceType)
+	if err != nil {
+		return "", fmt.Errorf("could not get instance type: %v", err)
+	}
+
+	return instanceType, nil
+}
+
+// InstanceTypeByProviderID returns the type of the specified instance.
+func (m *metadata) InstanceTypeByProviderID(ctx context.Context, providerID string) (string, error) {
+	return "", errors.New("InstanceTypeByProviderID not implemented")
+}
+
+// AddSSHKeyToAllInstances is currently not implemented.
+func (m *metadata) AddSSHKeyToAllInstances(ctx context.Context, user string, keyData []byte) error {
+	return cloudprovider.NotImplemented
+}
+
+// CurrentNodeName returns the name of the node we are currently running on.
+func (m *metadata) CurrentNodeName(ctx context.Context, hostname string) (types.NodeName, error) {
+	return types.NodeName(hostname), nil
+}
+
+// InstanceExistsByProviderID returns if the instance still exists.
+func (m *metadata) InstanceExistsByProviderID(ctx context.Context, providerID string) (bool, error) {
+	return false, errors.New("InstanceExistsByProviderID not implemented")
+}
+
+// InstanceShutdownByProviderID returns if the instance is shutdown.
+func (m *metadata) InstanceShutdownByProviderID(ctx context.Context, providerID string) (bool, error) {
+	return false, cloudprovider.NotImplemented
+}
+
+// GetZone returns the Zone containing the region that the program is running in.
+func (m *metadata) GetZone(ctx context.Context) (cloudprovider.Zone, error) {
+	zone := cloudprovider.Zone{}
+
+	if m.zone == "" {
+		zoneName, err := m.get(metadataTypeZone)
+		if err != nil {
+			return zone, fmt.Errorf("could not get zone: %v", err)
+		}
+
+		m.zone = zoneName
+	}
+
+	glog.V(2).Infof("Current zone is %v", zone)
+	zone.FailureDomain = m.zone
+	zone.Region = m.zone
+
+	return zone, nil
+}
+
+// GetZoneByProviderID returns the Zone, found by using the provider ID.
+func (m *metadata) GetZoneByProviderID(ctx context.Context, providerID string) (cloudprovider.Zone, error) {
+	return cloudprovider.Zone{}, errors.New("GetZoneByProviderID not implemented")
+}
+
+// GetZoneByNodeName returns the Zone, found by using the node name.
+func (m *metadata) GetZoneByNodeName(ctx context.Context, nodeName types.NodeName) (cloudprovider.Zone, error) {
+	return cloudprovider.Zone{}, errors.New("GetZoneByNodeName not implemented")
+}
+
+func (m *metadata) get(mdType metadataType) (string, error) {
+	url := fmt.Sprintf("http://%s/latest/meta-data/%s", m.dhcpServer, mdType)
+
+	resp, err := http.Get(url)
+	if err != nil {
+		return "", fmt.Errorf("error reading metadata: %v", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return "", fmt.Errorf("unexpected HTTP status: %d", resp.StatusCode)
+	}
+
+	data, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return "", fmt.Errorf("error reading response body: %d", resp.StatusCode)
+	}
+
+	return string(data), nil
+}
+
+func findDHCPServer() (string, error) {
+	nics, err := net.Interfaces()
+	if err != nil {
+		return "", fmt.Errorf("could not get interfaces: %v", err)
+	}
+
+	for _, nic := range nics {
+		if nic.Flags&net.FlagUp == 1 && nic.Flags&net.FlagLoopback == 0 && nic.Flags&net.FlagPointToPoint == 0 {
+			addrs, err := nic.Addrs()
+			if err != nil {
+				return "", fmt.Errorf("error reading IP addresses from interface %v: %v", nic.Name, err)
+			}
+
+			if addrs != nil {
+				client, err := newDHCPClient(&nic)
+				if err != nil {
+					return "", fmt.Errorf("error creating new DHCP client: %v", err)
+				}
+
+				discoverPacket, err := client.SendDiscoverPacket()
+				if err != nil {
+					return "", fmt.Errorf("error sending DHCP discover package: %v", err)
+				}
+
+				offerPacket, err := client.GetOffer(&discoverPacket)
+				if err != nil {
+					return "", fmt.Errorf("error receiving DHCP offer package: %v", err)
+				}
+
+				offerPacketOptions := offerPacket.ParseOptions()
+
+				if ipaddr, ok := offerPacketOptions[dhcp4.OptionServerIdentifier]; ok {
+					return net.IP(ipaddr).String(), nil
+				}
+			}
+		}
+	}
+
+	return "", errors.New("no server found")
+}

vendor/k8s.io/kubernetes/pkg/cloudprovider/providers/cloudstack/metadata_linux.go

@@ -0,0 +1,40 @@
+// +build linux
+
+/*
+Copyright 2016 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 cloudstack
+
+import (
+	"net"
+	"time"
+
+	"github.com/d2g/dhcp4client"
+)
+
+func newDHCPClient(nic *net.Interface) (*dhcp4client.Client, error) {
+	pktsock, err := dhcp4client.NewPacketSock(nic.Index)
+	if err != nil {
+		return nil, err
+	}
+
+	return dhcp4client.New(
+		dhcp4client.HardwareAddr(nic.HardwareAddr),
+		dhcp4client.Timeout(2*time.Second),
+		dhcp4client.Broadcast(false),
+		dhcp4client.Connection(pktsock),
+	)
+}

vendor/k8s.io/kubernetes/pkg/cloudprovider/providers/cloudstack/metadata_other.go

@@ -0,0 +1,40 @@
+// +build !linux
+
+/*
+Copyright 2016 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 cloudstack
+
+import (
+	"net"
+	"time"
+
+	"github.com/d2g/dhcp4client"
+)
+
+func newDHCPClient(nic *net.Interface) (*dhcp4client.Client, error) {
+	inetsock, err := dhcp4client.NewInetSock()
+	if err != nil {
+		return nil, err
+	}
+
+	return dhcp4client.New(
+		dhcp4client.HardwareAddr(nic.HardwareAddr),
+		dhcp4client.Timeout(2*time.Second),
+		dhcp4client.Broadcast(false),
+		dhcp4client.Connection(inetsock),
+	)
+}