add timeout for Openstack cloud provider

pkg/cloudprovider/providers/openstack/openstack.go

@@ -52,6 +52,7 @@ import (
 const (
 	ProviderName     = "openstack"
 	AvailabilityZone = "availability_zone"
+	defaultTimeOut   = 60 * time.Second
 )
 
 var ErrNotFound = errors.New("Failed to find object")
@@ -102,6 +103,7 @@ type RouterOpts struct {
 
 type MetadataOpts struct {
 	SearchOrder    string     `gcfg:"search-order"`
+	RequestTimeout MyDuration `gcfg:"request-timeout"`
 }
 
 // OpenStack is an implementation of cloud provider Interface for OpenStack.
@@ -290,6 +292,12 @@ func newOpenStack(cfg Config) (*OpenStack, error) {
 		return nil, err
 	}
 
+	emptyDuration := MyDuration{}
+	if cfg.Metadata.RequestTimeout == emptyDuration {
+		cfg.Metadata.RequestTimeout.Duration = time.Duration(defaultTimeOut)
+	}
+	provider.HTTPClient.Timeout = cfg.Metadata.RequestTimeout.Duration
+
 	os := OpenStack{
 		provider:     provider,
 		region:       cfg.Global.Region,