e18e8ec3c0
This adds context to all the relevant cloud provider interface signatures. Callers of those APIs are currently satisfied using context.TODO(). There will be follow on PRs to push the context through the stack. For an idea of the full scope of this change please look at PR #58532.
326 lines
8.1 KiB
Go
326 lines
8.1 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package openstack
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import (
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"context"
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"errors"
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"github.com/gophercloud/gophercloud"
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"github.com/gophercloud/gophercloud/openstack/compute/v2/servers"
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"github.com/gophercloud/gophercloud/openstack/networking/v2/extensions/layer3/routers"
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neutronports "github.com/gophercloud/gophercloud/openstack/networking/v2/ports"
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"github.com/golang/glog"
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"k8s.io/apimachinery/pkg/types"
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"k8s.io/kubernetes/pkg/cloudprovider"
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)
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var errNoRouterID = errors.New("router-id not set in cloud provider config")
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// Routes implements the cloudprovider.Routes for OpenStack clouds
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type Routes struct {
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compute *gophercloud.ServiceClient
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network *gophercloud.ServiceClient
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opts RouterOpts
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}
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// NewRoutes creates a new instance of Routes
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func NewRoutes(compute *gophercloud.ServiceClient, network *gophercloud.ServiceClient, opts RouterOpts) (cloudprovider.Routes, error) {
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if opts.RouterID == "" {
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return nil, errNoRouterID
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}
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return &Routes{
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compute: compute,
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network: network,
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opts: opts,
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}, nil
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}
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// ListRoutes lists all managed routes that belong to the specified clusterName
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func (r *Routes) ListRoutes(ctx context.Context, clusterName string) ([]*cloudprovider.Route, error) {
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glog.V(4).Infof("ListRoutes(%v)", clusterName)
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nodeNamesByAddr := make(map[string]types.NodeName)
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err := foreachServer(r.compute, servers.ListOpts{}, func(srv *servers.Server) (bool, error) {
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addrs, err := nodeAddresses(srv)
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if err != nil {
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return false, err
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}
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name := mapServerToNodeName(srv)
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for _, addr := range addrs {
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nodeNamesByAddr[addr.Address] = name
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}
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return true, nil
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})
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if err != nil {
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return nil, err
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}
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router, err := routers.Get(r.network, r.opts.RouterID).Extract()
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if err != nil {
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return nil, err
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}
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var routes []*cloudprovider.Route
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for _, item := range router.Routes {
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nodeName, foundNode := nodeNamesByAddr[item.NextHop]
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route := cloudprovider.Route{
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Name: item.DestinationCIDR,
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TargetNode: nodeName, //empty if NextHop is unknown
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Blackhole: !foundNode,
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DestinationCIDR: item.DestinationCIDR,
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}
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routes = append(routes, &route)
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}
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return routes, nil
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}
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func updateRoutes(network *gophercloud.ServiceClient, router *routers.Router, newRoutes []routers.Route) (func(), error) {
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origRoutes := router.Routes // shallow copy
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_, err := routers.Update(network, router.ID, routers.UpdateOpts{
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Routes: newRoutes,
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}).Extract()
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if err != nil {
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return nil, err
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}
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unwinder := func() {
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glog.V(4).Info("Reverting routes change to router ", router.ID)
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_, err := routers.Update(network, router.ID, routers.UpdateOpts{
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Routes: origRoutes,
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}).Extract()
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if err != nil {
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glog.Warning("Unable to reset routes during error unwind: ", err)
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}
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}
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return unwinder, nil
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}
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func updateAllowedAddressPairs(network *gophercloud.ServiceClient, port *neutronports.Port, newPairs []neutronports.AddressPair) (func(), error) {
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origPairs := port.AllowedAddressPairs // shallow copy
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_, err := neutronports.Update(network, port.ID, neutronports.UpdateOpts{
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AllowedAddressPairs: &newPairs,
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}).Extract()
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if err != nil {
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return nil, err
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}
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unwinder := func() {
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glog.V(4).Info("Reverting allowed-address-pairs change to port ", port.ID)
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_, err := neutronports.Update(network, port.ID, neutronports.UpdateOpts{
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AllowedAddressPairs: &origPairs,
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}).Extract()
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if err != nil {
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glog.Warning("Unable to reset allowed-address-pairs during error unwind: ", err)
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}
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}
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return unwinder, nil
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}
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// CreateRoute creates the described managed route
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func (r *Routes) CreateRoute(ctx context.Context, clusterName string, nameHint string, route *cloudprovider.Route) error {
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glog.V(4).Infof("CreateRoute(%v, %v, %v)", clusterName, nameHint, route)
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onFailure := newCaller()
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addr, err := getAddressByName(r.compute, route.TargetNode)
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if err != nil {
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return err
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}
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glog.V(4).Infof("Using nexthop %v for node %v", addr, route.TargetNode)
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router, err := routers.Get(r.network, r.opts.RouterID).Extract()
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if err != nil {
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return err
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}
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routes := router.Routes
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for _, item := range routes {
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if item.DestinationCIDR == route.DestinationCIDR && item.NextHop == addr {
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glog.V(4).Infof("Skipping existing route: %v", route)
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return nil
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}
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}
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routes = append(routes, routers.Route{
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DestinationCIDR: route.DestinationCIDR,
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NextHop: addr,
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})
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unwind, err := updateRoutes(r.network, router, routes)
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if err != nil {
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return err
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}
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defer onFailure.call(unwind)
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// get the port of addr on target node.
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portID, err := getPortIDByIP(r.compute, route.TargetNode, addr)
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if err != nil {
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return err
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}
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port, err := getPortByID(r.network, portID)
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if err != nil {
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return err
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}
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found := false
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for _, item := range port.AllowedAddressPairs {
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if item.IPAddress == route.DestinationCIDR {
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glog.V(4).Info("Found existing allowed-address-pair: ", item)
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found = true
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break
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}
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}
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if !found {
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newPairs := append(port.AllowedAddressPairs, neutronports.AddressPair{
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IPAddress: route.DestinationCIDR,
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})
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unwind, err := updateAllowedAddressPairs(r.network, port, newPairs)
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if err != nil {
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return err
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}
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defer onFailure.call(unwind)
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}
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glog.V(4).Infof("Route created: %v", route)
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onFailure.disarm()
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return nil
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}
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// DeleteRoute deletes the specified managed route
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func (r *Routes) DeleteRoute(ctx context.Context, clusterName string, route *cloudprovider.Route) error {
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glog.V(4).Infof("DeleteRoute(%v, %v)", clusterName, route)
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onFailure := newCaller()
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addr, err := getAddressByName(r.compute, route.TargetNode)
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if err != nil {
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return err
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}
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router, err := routers.Get(r.network, r.opts.RouterID).Extract()
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if err != nil {
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return err
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}
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routes := router.Routes
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index := -1
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for i, item := range routes {
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if item.DestinationCIDR == route.DestinationCIDR && item.NextHop == addr {
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index = i
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break
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}
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}
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if index == -1 {
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glog.V(4).Infof("Skipping non-existent route: %v", route)
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return nil
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}
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// Delete element `index`
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routes[index] = routes[len(routes)-1]
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routes = routes[:len(routes)-1]
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unwind, err := updateRoutes(r.network, router, routes)
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if err != nil {
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return err
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}
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defer onFailure.call(unwind)
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// get the port of addr on target node.
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portID, err := getPortIDByIP(r.compute, route.TargetNode, addr)
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if err != nil {
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return err
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}
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port, err := getPortByID(r.network, portID)
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if err != nil {
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return err
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}
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addrPairs := port.AllowedAddressPairs
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index = -1
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for i, item := range addrPairs {
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if item.IPAddress == route.DestinationCIDR {
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index = i
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break
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}
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}
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if index != -1 {
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// Delete element `index`
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addrPairs[index] = addrPairs[len(addrPairs)-1]
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addrPairs = addrPairs[:len(addrPairs)-1]
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unwind, err := updateAllowedAddressPairs(r.network, port, addrPairs)
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if err != nil {
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return err
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}
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defer onFailure.call(unwind)
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}
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glog.V(4).Infof("Route deleted: %v", route)
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onFailure.disarm()
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return nil
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}
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func getPortIDByIP(compute *gophercloud.ServiceClient, targetNode types.NodeName, ipAddress string) (string, error) {
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srv, err := getServerByName(compute, targetNode, true)
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if err != nil {
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return "", err
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}
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interfaces, err := getAttachedInterfacesByID(compute, srv.ID)
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if err != nil {
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return "", err
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}
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for _, intf := range interfaces {
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for _, fixedIP := range intf.FixedIPs {
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if fixedIP.IPAddress == ipAddress {
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return intf.PortID, nil
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}
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}
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}
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return "", ErrNotFound
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}
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func getPortByID(client *gophercloud.ServiceClient, portID string) (*neutronports.Port, error) {
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targetPort, err := neutronports.Get(client, portID).Extract()
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if err != nil {
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return nil, err
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}
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if targetPort == nil {
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return nil, ErrNotFound
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}
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return targetPort, nil
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}
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