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/*
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 azure
import (
"fmt"
"k8s.io/kubernetes/pkg/cloudprovider"
"github.com/Azure/azure-sdk-for-go/arm/network"
"github.com/Azure/go-autorest/autorest/to"
"github.com/golang/glog"
"k8s.io/kubernetes/pkg/types"
)
// ListRoutes lists all managed routes that belong to the specified clusterName
func (az *Cloud) ListRoutes(clusterName string) (routes []*cloudprovider.Route, err error) {
glog.V(10).Infof("list: START clusterName=%q", clusterName)
routeTable, existsRouteTable, err := az.getRouteTable()
if err != nil {
return nil, err
}
if !existsRouteTable {
return []*cloudprovider.Route{}, nil
}
var kubeRoutes []*cloudprovider.Route
if routeTable.Properties.Routes != nil {
kubeRoutes = make([]*cloudprovider.Route, len(*routeTable.Properties.Routes))
for i, route := range *routeTable.Properties.Routes {
instance := mapRouteNameToNodeName(*route.Name)
cidr := *route.Properties.AddressPrefix
glog.V(10).Infof("list: * instance=%q, cidr=%q", instance, cidr)
kubeRoutes[i] = &cloudprovider.Route{
Name: *route.Name,
TargetNode: instance,
DestinationCIDR: cidr,
}
}
}
glog.V(10).Info("list: FINISH")
return kubeRoutes, nil
}
// CreateRoute creates the described managed route
// route.Name will be ignored, although the cloud-provider may use nameHint
// to create a more user-meaningful name.
func (az *Cloud) CreateRoute(clusterName string, nameHint string, kubeRoute *cloudprovider.Route) error {
glog.V(2).Infof("create: creating route. clusterName=%q instance=%q cidr=%q", clusterName, kubeRoute.TargetNode, kubeRoute.DestinationCIDR)
routeTable, existsRouteTable, err := az.getRouteTable()
if err != nil {
return err
}
if !existsRouteTable {
routeTable = network.RouteTable{
Name: to.StringPtr(az.RouteTableName),
Location: to.StringPtr(az.Location),
Properties: &network.RouteTablePropertiesFormat{},
}
glog.V(3).Infof("create: creating routetable. routeTableName=%q", az.RouteTableName)
_, err = az.RouteTablesClient.CreateOrUpdate(az.ResourceGroup, az.RouteTableName, routeTable, nil)
if err != nil {
return err
}
routeTable, err = az.RouteTablesClient.Get(az.ResourceGroup, az.RouteTableName, "")
if err != nil {
return err
}
}
// ensure the subnet is properly configured
subnet, err := az.SubnetsClient.Get(az.ResourceGroup, az.VnetName, az.SubnetName, "")
if err != nil {
// 404 is fatal here
return err
}
if subnet.Properties.RouteTable != nil {
if *subnet.Properties.RouteTable.ID != *routeTable.ID {
return fmt.Errorf("The subnet has a route table, but it was unrecognized. Refusing to modify it. active_routetable=%q expected_routetable=%q", *subnet.Properties.RouteTable.ID, *routeTable.ID)
}
} else {
subnet.Properties.RouteTable = &network.RouteTable{
ID: routeTable.ID,
}
glog.V(3).Info("create: updating subnet")
_, err := az.SubnetsClient.CreateOrUpdate(az.ResourceGroup, az.VnetName, az.SubnetName, subnet, nil)
if err != nil {
return err
}
}
targetIP, err := az.getIPForMachine(kubeRoute.TargetNode)
if err != nil {
return err
}
routeName := mapNodeNameToRouteName(kubeRoute.TargetNode)
route := network.Route{
Name: to.StringPtr(routeName),
Properties: &network.RoutePropertiesFormat{
AddressPrefix: to.StringPtr(kubeRoute.DestinationCIDR),
NextHopType: network.RouteNextHopTypeVirtualAppliance,
NextHopIPAddress: to.StringPtr(targetIP),
},
}
glog.V(3).Infof("create: creating route: instance=%q cidr=%q", kubeRoute.TargetNode, kubeRoute.DestinationCIDR)
_, err = az.RoutesClient.CreateOrUpdate(az.ResourceGroup, az.RouteTableName, *route.Name, route, nil)
if err != nil {
return err
}
glog.V(2).Infof("create: route created. clusterName=%q instance=%q cidr=%q", clusterName, kubeRoute.TargetNode, kubeRoute.DestinationCIDR)
return nil
}
// DeleteRoute deletes the specified managed route
// Route should be as returned by ListRoutes
func (az *Cloud) DeleteRoute(clusterName string, kubeRoute *cloudprovider.Route) error {
glog.V(2).Infof("delete: deleting route. clusterName=%q instance=%q cidr=%q", clusterName, kubeRoute.TargetNode, kubeRoute.DestinationCIDR)
routeName := mapNodeNameToRouteName(kubeRoute.TargetNode)
_, err := az.RoutesClient.Delete(az.ResourceGroup, az.RouteTableName, routeName, nil)
if err != nil {
return err
}
glog.V(2).Infof("delete: route deleted. clusterName=%q instance=%q cidr=%q", clusterName, kubeRoute.TargetNode, kubeRoute.DestinationCIDR)
return nil
}
// This must be kept in sync with mapRouteNameToNodeName.
// These two functions enable stashing the instance name in the route
// and then retrieving it later when listing. This is needed because
// Azure does not let you put tags/descriptions on the Route itself.
func mapNodeNameToRouteName(nodeName types.NodeName) string {
return fmt.Sprintf("%s", nodeName)
}
// Used with mapNodeNameToRouteName. See comment on mapNodeNameToRouteName.
func mapRouteNameToNodeName(routeName string) types.NodeName {
return types.NodeName(fmt.Sprintf("%s", routeName))
}
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