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route controller + azure v6 routes

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This commit is contained in:
Khaled Henidak(Kal) 2019-06-11 18:00:37 +00:00
parent 584d7103e2
commit a51b8ce456
14 changed files with 554 additions and 74 deletions
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53
cmd/cloud-controller-manager/app/core.go
View File

@ -21,6 +21,7 @@ limitations under the License.
package app
import (
"fmt"
"net"
"net/http"
"strings"
@ -31,6 +32,10 @@ import (
cloudcontrollers "k8s.io/kubernetes/pkg/controller/cloud"
routecontroller "k8s.io/kubernetes/pkg/controller/route"
servicecontroller "k8s.io/kubernetes/pkg/controller/service"
netutils "k8s.io/utils/net"
utilfeature "k8s.io/apiserver/pkg/util/feature"
kubefeatures "k8s.io/kubernetes/pkg/features"
)
func startCloudNodeController(ctx *cloudcontrollerconfig.CompletedConfig, cloud cloudprovider.Interface, stopCh <-chan struct{}) (http.Handler, bool, error) {
@ -98,13 +103,26 @@ func startRouteController(ctx *cloudcontrollerconfig.CompletedConfig, cloud clou
klog.Warning("configure-cloud-routes is set, but cloud provider does not support routes. Will not configure cloud provider routes.")
return nil, false, nil
}
var clusterCIDR *net.IPNet
var err error
if len(strings.TrimSpace(ctx.ComponentConfig.KubeCloudShared.ClusterCIDR)) != 0 {
_, clusterCIDR, err = net.ParseCIDR(ctx.ComponentConfig.KubeCloudShared.ClusterCIDR)
if err != nil {
klog.Warningf("Unsuccessful parsing of cluster CIDR %v: %v", ctx.ComponentConfig.KubeCloudShared.ClusterCIDR, err)
}
// failure: bad cidrs in config
clusterCIDRs, dualStack, err := processCIDRs(ctx.ComponentConfig.KubeCloudShared.ClusterCIDR)
if err != nil {
return nil, false, err
}
// failure: more than one cidr and dual stack is not enabled
if len(clusterCIDRs) > 1 && !utilfeature.DefaultFeatureGate.Enabled(kubefeatures.IPv6DualStack) {
return nil, false, fmt.Errorf("len of ClusterCIDRs==%v and dualstack feature is not enabled", len(clusterCIDRs))
}
// failure: more than one cidr but they are not configured as dual stack
if len(clusterCIDRs) > 1 && !dualStack {
return nil, false, fmt.Errorf("len of ClusterCIDRs==%v and they are not configured as dual stack (at least one from each IPFamily", len(clusterCIDRs))
}
// failure: more than cidrs is not allowed even with dual stack
if len(clusterCIDRs) > 2 {
return nil, false, fmt.Errorf("length of clusterCIDRs is:%v more than max allowed of 2", len(clusterCIDRs))
}
routeController := routecontroller.New(
@ -112,9 +130,28 @@ func startRouteController(ctx *cloudcontrollerconfig.CompletedConfig, cloud clou
ctx.ClientBuilder.ClientOrDie("route-controller"),
ctx.SharedInformers.Core().V1().Nodes(),
ctx.ComponentConfig.KubeCloudShared.ClusterName,
clusterCIDR,
clusterCIDRs,
)
go routeController.Run(stopCh, ctx.ComponentConfig.KubeCloudShared.RouteReconciliationPeriod.Duration)
return nil, true, nil
}
// processCIDRs is a helper function that works on a comma separated cidrs and returns
// a list of typed cidrs
// a flag if cidrs represents a dual stack
// error if failed to parse any of the cidrs
func processCIDRs(cidrsList string) ([]*net.IPNet, bool, error) {
cidrsSplit := strings.Split(strings.TrimSpace(cidrsList), ",")
cidrs, err := netutils.ParseCIDRs(cidrsSplit)
if err != nil {
return nil, false, err
}
// if cidrs has an error then the previous call will fail
// safe to ignore error checking on next call
dualstack, _ := netutils.IsDualStackCIDRs(cidrs)
return cidrs, dualstack, nil
}

28
cmd/kube-controller-manager/app/core.go
View File

@ -194,11 +194,33 @@ func startRouteController(ctx ControllerContext) (http.Handler, bool, error) {
klog.Warning("configure-cloud-routes is set, but cloud provider does not support routes. Will not configure cloud provider routes.")
return nil, false, nil
}
_, clusterCIDR, err := net.ParseCIDR(ctx.ComponentConfig.KubeCloudShared.ClusterCIDR)
// failure: bad cidrs in config
clusterCIDRs, dualStack, err := processCIDRs(ctx.ComponentConfig.KubeCloudShared.ClusterCIDR)
if err != nil {
klog.Warningf("Unsuccessful parsing of cluster CIDR %v: %v", ctx.ComponentConfig.KubeCloudShared.ClusterCIDR, err)
return nil, false, err
}
routeController := routecontroller.New(routes, ctx.ClientBuilder.ClientOrDie("route-controller"), ctx.InformerFactory.Core().V1().Nodes(), ctx.ComponentConfig.KubeCloudShared.ClusterName, clusterCIDR)
// failure: more than one cidr and dual stack is not enabled
if len(clusterCIDRs) > 1 && !utilfeature.DefaultFeatureGate.Enabled(kubefeatures.IPv6DualStack) {
return nil, false, fmt.Errorf("len of ClusterCIDRs==%v and dualstack feature is not enabled", len(clusterCIDRs))
}
// failure: more than one cidr but they are not configured as dual stack
if len(clusterCIDRs) > 1 && !dualStack {
return nil, false, fmt.Errorf("len of ClusterCIDRs==%v and they are not configured as dual stack (at least one from each IPFamily", len(clusterCIDRs))
}
// failure: more than cidrs is not allowed even with dual stack
if len(clusterCIDRs) > 2 {
return nil, false, fmt.Errorf("length of clusterCIDRs is:%v more than max allowed of 2", len(clusterCIDRs))
}
routeController := routecontroller.New(routes,
ctx.ClientBuilder.ClientOrDie("route-controller"),
ctx.InformerFactory.Core().V1().Nodes(),
ctx.ComponentConfig.KubeCloudShared.ClusterName,
clusterCIDRs)
go routeController.Run(ctx.Stop, ctx.ComponentConfig.KubeCloudShared.RouteReconciliationPeriod.Duration)
return nil, true, nil
}

159
pkg/controller/route/route_controller.go
View File

@ -62,19 +62,19 @@ type RouteController struct {
routes cloudprovider.Routes
kubeClient clientset.Interface
clusterName string
clusterCIDR *net.IPNet
clusterCIDRs []*net.IPNet
nodeLister corelisters.NodeLister
nodeListerSynced cache.InformerSynced
broadcaster record.EventBroadcaster
recorder record.EventRecorder
}
func New(routes cloudprovider.Routes, kubeClient clientset.Interface, nodeInformer coreinformers.NodeInformer, clusterName string, clusterCIDR *net.IPNet) *RouteController {
func New(routes cloudprovider.Routes, kubeClient clientset.Interface, nodeInformer coreinformers.NodeInformer, clusterName string, clusterCIDRs []*net.IPNet) *RouteController {
if kubeClient != nil && kubeClient.CoreV1().RESTClient().GetRateLimiter() != nil {
metrics.RegisterMetricAndTrackRateLimiterUsage("route_controller", kubeClient.CoreV1().RESTClient().GetRateLimiter())
}
if clusterCIDR == nil {
if len(clusterCIDRs) == 0 {
klog.Fatal("RouteController: Must specify clusterCIDR.")
}
@ -86,7 +86,7 @@ func New(routes cloudprovider.Routes, kubeClient clientset.Interface, nodeInform
routes: routes,
kubeClient: kubeClient,
clusterName: clusterName,
clusterCIDR: clusterCIDR,
clusterCIDRs: clusterCIDRs,
nodeLister: nodeInformer.Lister(),
nodeListerSynced: nodeInformer.Informer().HasSynced,
broadcaster: eventBroadcaster,
@ -137,33 +137,52 @@ func (rc *RouteController) reconcileNodeRoutes() error {
}
func (rc *RouteController) reconcile(nodes []*v1.Node, routes []*cloudprovider.Route) error {
// nodeCIDRs maps nodeName->nodeCIDR
nodeCIDRs := make(map[types.NodeName]string)
var l sync.Mutex
// for each node a map of podCIDRs and their created status
nodeRoutesStatuses := make(map[types.NodeName]map[string]bool)
// routeMap maps routeTargetNode->route
routeMap := make(map[types.NodeName]*cloudprovider.Route)
routeMap := make(map[types.NodeName][]*cloudprovider.Route)
for _, route := range routes {
if route.TargetNode != "" {
routeMap[route.TargetNode] = route
routeMap[route.TargetNode] = append(routeMap[route.TargetNode], route)
}
}
wg := sync.WaitGroup{}
rateLimiter := make(chan struct{}, maxConcurrentRouteCreations)
// searches existing routes by node for a matching route
for _, node := range nodes {
// Skip if the node hasn't been assigned a CIDR yet.
if node.Spec.PodCIDR == "" {
if len(node.Spec.PodCIDRs) == 0 {
continue
}
nodeName := types.NodeName(node.Name)
// Check if we have a route for this node w/ the correct CIDR.
r := routeMap[nodeName]
if r == nil || r.DestinationCIDR != node.Spec.PodCIDR {
// If not, create the route.
l.Lock()
nodeRoutesStatuses[nodeName] = make(map[string]bool)
l.Unlock()
// for every node, for every cidr
for _, podCIDR := range node.Spec.PodCIDRs {
// we add it to our nodeCIDRs map here because add and delete go routines run at the same time
l.Lock()
nodeRoutesStatuses[nodeName][podCIDR] = false
l.Unlock()
// ignore if already created
if hasRoute(routeMap, nodeName, podCIDR) {
l.Lock()
nodeRoutesStatuses[nodeName][podCIDR] = true // a route for this podCIDR is already created
l.Unlock()
continue
}
// if we are here, then a route needs to be created for this node
route := &cloudprovider.Route{
TargetNode: nodeName,
DestinationCIDR: node.Spec.PodCIDR,
DestinationCIDR: podCIDR,
}
// cloud providers that:
// - depend on nameHint
// - trying to support dual stack
// will have to carefully generate new route names that allow node->(multi cidr)
nameHint := string(node.UID)
wg.Add(1)
go func(nodeName types.NodeName, nameHint string, route *cloudprovider.Route) {
@ -176,8 +195,6 @@ func (rc *RouteController) reconcile(nodes []*v1.Node, routes []*cloudprovider.R
klog.Infof("Creating route for node %s %s with hint %s, throttled %v", nodeName, route.DestinationCIDR, nameHint, time.Since(startTime))
err := rc.routes.CreateRoute(context.TODO(), rc.clusterName, nameHint, route)
<-rateLimiter
rc.updateNetworkingCondition(nodeName, err == nil)
if err != nil {
msg := fmt.Sprintf("Could not create route %s %s for node %s after %v: %v", nameHint, route.DestinationCIDR, nodeName, time.Since(startTime), err)
if rc.recorder != nil {
@ -188,10 +205,13 @@ func (rc *RouteController) reconcile(nodes []*v1.Node, routes []*cloudprovider.R
UID: types.UID(nodeName),
Namespace: "",
}, v1.EventTypeWarning, "FailedToCreateRoute", msg)
klog.V(4).Infof(msg)
return err
}
klog.V(4).Infof(msg)
return err
}
l.Lock()
nodeRoutesStatuses[nodeName][route.DestinationCIDR] = true
l.Unlock()
klog.Infof("Created route for node %s %s with hint %s after %v", nodeName, route.DestinationCIDR, nameHint, time.Since(startTime))
return nil
})
@ -199,23 +219,31 @@ func (rc *RouteController) reconcile(nodes []*v1.Node, routes []*cloudprovider.R
klog.Errorf("Could not create route %s %s for node %s: %v", nameHint, route.DestinationCIDR, nodeName, err)
}
}(nodeName, nameHint, route)
} else {
// Update condition only if it doesn't reflect the current state.
_, condition := nodeutil.GetNodeCondition(&node.Status, v1.NodeNetworkUnavailable)
if condition == nil || condition.Status != v1.ConditionFalse {
rc.updateNetworkingCondition(types.NodeName(node.Name), true)
}
}
nodeCIDRs[nodeName] = node.Spec.PodCIDR
}
// searches our bag of node->cidrs for a match
nodeHasCidr := func(nodeName types.NodeName, cidr string) bool {
l.Lock()
defer l.Unlock()
nodeRoutes := nodeRoutesStatuses[nodeName]
if nodeRoutes == nil {
return false
}
_, exist := nodeRoutes[cidr]
return exist
}
// delete routes that are not in use
for _, route := range routes {
if rc.isResponsibleForRoute(route) {
// Check if this route is a blackhole, or applies to a node we know about & has an incorrect CIDR.
if route.Blackhole || (nodeCIDRs[route.TargetNode] != route.DestinationCIDR) {
if route.Blackhole || !nodeHasCidr(route.TargetNode, route.DestinationCIDR) {
wg.Add(1)
// Delete the route.
go func(route *cloudprovider.Route, startTime time.Time) {
defer wg.Done()
// respect the rate limiter
rateLimiter <- struct{}{}
klog.Infof("Deleting route %s %s", route.Name, route.DestinationCIDR)
if err := rc.routes.DeleteRoute(context.TODO(), rc.clusterName, route); err != nil {
@ -229,17 +257,62 @@ func (rc *RouteController) reconcile(nodes []*v1.Node, routes []*cloudprovider.R
}
}
wg.Wait()
// after all routes have been created (or not), we start updating
// all nodes' statuses with the outcome
for _, node := range nodes {
wg.Add(1)
nodeRoutes := nodeRoutesStatuses[types.NodeName(node.Name)]
allRoutesCreated := true
if len(nodeRoutes) == 0 {
go func(n *v1.Node) {
defer wg.Done()
klog.Infof("node %v has no routes assigned to it. NodeNetworkUnavailable will be set to true", n.Name)
rc.updateNetworkingCondition(n, false)
}(node)
continue
}
// check if all routes were created. if so, then it should be ready
for _, created := range nodeRoutes {
if !created {
allRoutesCreated = false
break
}
}
go func(n *v1.Node) {
defer wg.Done()
rc.updateNetworkingCondition(n, allRoutesCreated)
}(node)
}
wg.Wait()
return nil
}
func (rc *RouteController) updateNetworkingCondition(nodeName types.NodeName, routeCreated bool) error {
func (rc *RouteController) updateNetworkingCondition(node *v1.Node, routesCreated bool) error {
_, condition := nodeutil.GetNodeCondition(&(node.Status), v1.NodeNetworkUnavailable)
if routesCreated && condition != nil && condition.Status == v1.ConditionFalse {
klog.V(2).Infof("set node %v with NodeNetworkUnavailable=false was canceled because it is already set", node.Name)
return nil
}
if !routesCreated && condition != nil && condition.Status == v1.ConditionTrue {
klog.V(2).Infof("set node %v with NodeNetworkUnavailable=true was canceled because it is already set", node.Name)
return nil
}
klog.Infof("Patching node status %v with %v previous condition was:%+v", node.Name, routesCreated, condition)
// either condition is not there, or has a value != to what we need
// start setting it
err := clientretry.RetryOnConflict(updateNetworkConditionBackoff, func() error {
var err error
// Patch could also fail, even though the chance is very slim. So we still do
// patch in the retry loop.
currentTime := metav1.Now()
if routeCreated {
err = utilnode.SetNodeCondition(rc.kubeClient, nodeName, v1.NodeCondition{
if routesCreated {
err = utilnode.SetNodeCondition(rc.kubeClient, types.NodeName(node.Name), v1.NodeCondition{
Type: v1.NodeNetworkUnavailable,
Status: v1.ConditionFalse,
Reason: "RouteCreated",
@ -247,7 +320,7 @@ func (rc *RouteController) updateNetworkingCondition(nodeName types.NodeName, ro
LastTransitionTime: currentTime,
})
} else {
err = utilnode.SetNodeCondition(rc.kubeClient, nodeName, v1.NodeCondition{
err = utilnode.SetNodeCondition(rc.kubeClient, types.NodeName(node.Name), v1.NodeCondition{
Type: v1.NodeNetworkUnavailable,
Status: v1.ConditionTrue,
Reason: "NoRouteCreated",
@ -256,13 +329,13 @@ func (rc *RouteController) updateNetworkingCondition(nodeName types.NodeName, ro
})
}
if err != nil {
klog.V(4).Infof("Error updating node %s, retrying: %v", nodeName, err)
klog.V(4).Infof("Error updating node %s, retrying: %v", types.NodeName(node.Name), err)
}
return err
})
if err != nil {
klog.Errorf("Error updating node %s: %v", nodeName, err)
klog.Errorf("Error updating node %s: %v", node.Name, err)
}
return err
@ -279,8 +352,24 @@ func (rc *RouteController) isResponsibleForRoute(route *cloudprovider.Route) boo
for i := range lastIP {
lastIP[i] = cidr.IP[i] | ^cidr.Mask[i]
}
if !rc.clusterCIDR.Contains(cidr.IP) || !rc.clusterCIDR.Contains(lastIP) {
return false
// check across all cluster cidrs
for _, clusterCIDR := range rc.clusterCIDRs {
if clusterCIDR.Contains(cidr.IP) || clusterCIDR.Contains(lastIP) {
return true
}
}
return true
return false
}
// checks if a node owns a route with a specific cidr
func hasRoute(rm map[types.NodeName][]*cloudprovider.Route, nodeName types.NodeName, cidr string) bool {
if routes, ok := rm[nodeName]; ok {
for _, route := range routes {
if route.DestinationCIDR == cidr {
return true
}
}
}
return false
}

159
pkg/controller/route/route_controller_test.go
View File

@ -51,12 +51,14 @@ func TestIsResponsibleForRoute(t *testing.T) {
{"10.244.0.0/16", myClusterRoute, "10.244.255.0/24", true},
{"10.244.0.0/14", myClusterRoute, "10.244.0.0/24", true},
{"10.244.0.0/14", myClusterRoute, "10.247.255.0/24", true},
{"a00:100::/10", myClusterRoute, "a00:100::/24", true},
// Routes that match our naming/tagging scheme, but are outside our cidr
{"10.244.0.0/16", myClusterRoute, "10.224.0.0/24", false},
{"10.244.0.0/16", myClusterRoute, "10.0.10.0/24", false},
{"10.244.0.0/16", myClusterRoute, "10.255.255.0/24", false},
{"10.244.0.0/14", myClusterRoute, "10.248.0.0/24", false},
{"10.244.0.0/14", myClusterRoute, "10.243.255.0/24", false},
{"a00:100::/10", myClusterRoute, "b00:100::/24", false},
}
for i, testCase := range testCases {
_, cidr, err := net.ParseCIDR(testCase.clusterCIDR)
@ -65,7 +67,7 @@ func TestIsResponsibleForRoute(t *testing.T) {
}
client := fake.NewSimpleClientset()
informerFactory := informers.NewSharedInformerFactory(client, controller.NoResyncPeriodFunc())
rc := New(nil, nil, informerFactory.Core().V1().Nodes(), myClusterName, cidr)
rc := New(nil, nil, informerFactory.Core().V1().Nodes(), myClusterName, []*net.IPNet{cidr})
rc.nodeListerSynced = alwaysReady
route := &cloudprovider.Route{
Name: testCase.routeName,
@ -80,17 +82,137 @@ func TestIsResponsibleForRoute(t *testing.T) {
func TestReconcile(t *testing.T) {
cluster := "my-k8s"
node1 := v1.Node{ObjectMeta: metav1.ObjectMeta{Name: "node-1", UID: "01"}, Spec: v1.NodeSpec{PodCIDR: "10.120.0.0/24"}}
node2 := v1.Node{ObjectMeta: metav1.ObjectMeta{Name: "node-2", UID: "02"}, Spec: v1.NodeSpec{PodCIDR: "10.120.1.0/24"}}
node1 := v1.Node{ObjectMeta: metav1.ObjectMeta{Name: "node-1", UID: "01"}, Spec: v1.NodeSpec{PodCIDR: "10.120.0.0/24", PodCIDRs: []string{"10.120.0.0/24"}}}
node2 := v1.Node{ObjectMeta: metav1.ObjectMeta{Name: "node-2", UID: "02"}, Spec: v1.NodeSpec{PodCIDR: "10.120.1.0/24", PodCIDRs: []string{"10.120.1.0/24"}}}
nodeNoCidr := v1.Node{ObjectMeta: metav1.ObjectMeta{Name: "node-2", UID: "02"}, Spec: v1.NodeSpec{PodCIDR: ""}}
node3 := v1.Node{ObjectMeta: metav1.ObjectMeta{Name: "node-3", UID: "03"}, Spec: v1.NodeSpec{PodCIDR: "10.120.0.0/24", PodCIDRs: []string{"10.120.0.0/24", "a00:100::/24"}}}
node4 := v1.Node{ObjectMeta: metav1.ObjectMeta{Name: "node-4", UID: "04"}, Spec: v1.NodeSpec{PodCIDR: "10.120.1.0/24", PodCIDRs: []string{"10.120.1.0/24", "a00:200::/24"}}}
testCases := []struct {
nodes []*v1.Node
initialRoutes []*cloudprovider.Route
expectedRoutes []*cloudprovider.Route
expectedNetworkUnavailable []bool
clientset *fake.Clientset
dualStack bool
}{
// multicidr
// 2 nodes, no routes yet
{
dualStack: true,
nodes: []*v1.Node{
&node3,
&node4,
},
initialRoutes: []*cloudprovider.Route{},
expectedRoutes: []*cloudprovider.Route{
{Name: cluster + "-01", TargetNode: "node-3", DestinationCIDR: "10.120.0.0/24", Blackhole: false},
{Name: cluster + "-02", TargetNode: "node-4", DestinationCIDR: "10.120.1.0/24", Blackhole: false},
{Name: cluster + "-03", TargetNode: "node-3", DestinationCIDR: "a00:100::/24", Blackhole: false},
{Name: cluster + "-04", TargetNode: "node-4", DestinationCIDR: "a00:200::/24", Blackhole: false},
},
expectedNetworkUnavailable: []bool{true, true},
clientset: fake.NewSimpleClientset(&v1.NodeList{Items: []v1.Node{node1, node2}}),
},
// 2 nodes, all routes already created
{
dualStack: true,
nodes: []*v1.Node{
&node3,
&node4,
},
initialRoutes: []*cloudprovider.Route{
{Name: cluster + "-01", TargetNode: "node-3", DestinationCIDR: "10.120.0.0/24", Blackhole: false},
{Name: cluster + "-02", TargetNode: "node-4", DestinationCIDR: "10.120.1.0/24", Blackhole: false},
{Name: cluster + "-03", TargetNode: "node-3", DestinationCIDR: "a00:100::/24", Blackhole: false},
{Name: cluster + "-04", TargetNode: "node-4", DestinationCIDR: "a00:200::/24", Blackhole: false},
},
expectedRoutes: []*cloudprovider.Route{
{Name: cluster + "-01", TargetNode: "node-3", DestinationCIDR: "10.120.0.0/24", Blackhole: false},
{Name: cluster + "-02", TargetNode: "node-4", DestinationCIDR: "10.120.1.0/24", Blackhole: false},
{Name: cluster + "-03", TargetNode: "node-3", DestinationCIDR: "a00:100::/24", Blackhole: false},
{Name: cluster + "-04", TargetNode: "node-4", DestinationCIDR: "a00:200::/24", Blackhole: false},
},
expectedNetworkUnavailable: []bool{true, true},
clientset: fake.NewSimpleClientset(&v1.NodeList{Items: []v1.Node{node1, node2}}),
},
// 2 nodes, few wrong routes
{
dualStack: true,
nodes: []*v1.Node{
&node3,
&node4,
},
initialRoutes: []*cloudprovider.Route{
{Name: cluster + "-01", TargetNode: "node-3", DestinationCIDR: "10.120.1.0/24", Blackhole: false},
{Name: cluster + "-02", TargetNode: "node-4", DestinationCIDR: "10.120.0.0/24", Blackhole: false},
{Name: cluster + "-03", TargetNode: "node-3", DestinationCIDR: "a00:200::/24", Blackhole: false},
{Name: cluster + "-04", TargetNode: "node-4", DestinationCIDR: "a00:100::/24", Blackhole: false},
},
expectedRoutes: []*cloudprovider.Route{
{Name: cluster + "-01", TargetNode: "node-3", DestinationCIDR: "10.120.0.0/24", Blackhole: false},
{Name: cluster + "-02", TargetNode: "node-4", DestinationCIDR: "10.120.1.0/24", Blackhole: false},
{Name: cluster + "-03", TargetNode: "node-3", DestinationCIDR: "a00:100::/24", Blackhole: false},
{Name: cluster + "-04", TargetNode: "node-4", DestinationCIDR: "a00:200::/24", Blackhole: false},
},
expectedNetworkUnavailable: []bool{true, true},
clientset: fake.NewSimpleClientset(&v1.NodeList{Items: []v1.Node{node1, node2}}),
},
// 2 nodes, some routes already created
{
dualStack: true,
nodes: []*v1.Node{
&node3,
&node4,
},
initialRoutes: []*cloudprovider.Route{
{Name: cluster + "-01", TargetNode: "node-3", DestinationCIDR: "10.120.0.0/24", Blackhole: false},
{Name: cluster + "-04", TargetNode: "node-4", DestinationCIDR: "a00:200::/24", Blackhole: false},
},
expectedRoutes: []*cloudprovider.Route{
{Name: cluster + "-01", TargetNode: "node-3", DestinationCIDR: "10.120.0.0/24", Blackhole: false},
{Name: cluster + "-02", TargetNode: "node-4", DestinationCIDR: "10.120.1.0/24", Blackhole: false},
{Name: cluster + "-03", TargetNode: "node-3", DestinationCIDR: "a00:100::/24", Blackhole: false},
{Name: cluster + "-04", TargetNode: "node-4", DestinationCIDR: "a00:200::/24", Blackhole: false},
},
expectedNetworkUnavailable: []bool{true, true},
clientset: fake.NewSimpleClientset(&v1.NodeList{Items: []v1.Node{node1, node2}}),
},
// 2 nodes, too many routes
{
dualStack: true,
nodes: []*v1.Node{
&node3,
&node4,
},
initialRoutes: []*cloudprovider.Route{
{Name: cluster + "-01", TargetNode: "node-3", DestinationCIDR: "10.120.0.0/24", Blackhole: false},
{Name: cluster + "-02", TargetNode: "node-4", DestinationCIDR: "10.120.1.0/24", Blackhole: false},
{Name: cluster + "-001", TargetNode: "node-x", DestinationCIDR: "10.120.2.0/24", Blackhole: false},
{Name: cluster + "-03", TargetNode: "node-3", DestinationCIDR: "a00:100::/24", Blackhole: false},
{Name: cluster + "-04", TargetNode: "node-4", DestinationCIDR: "a00:200::/24", Blackhole: false},
{Name: cluster + "-0002", TargetNode: "node-y", DestinationCIDR: "a00:300::/24", Blackhole: false},
},
expectedRoutes: []*cloudprovider.Route{
{Name: cluster + "-01", TargetNode: "node-3", DestinationCIDR: "10.120.0.0/24", Blackhole: false},
{Name: cluster + "-02", TargetNode: "node-4", DestinationCIDR: "10.120.1.0/24", Blackhole: false},
{Name: cluster + "-03", TargetNode: "node-3", DestinationCIDR: "a00:100::/24", Blackhole: false},
{Name: cluster + "-04", TargetNode: "node-4", DestinationCIDR: "a00:200::/24", Blackhole: false},
},
expectedNetworkUnavailable: []bool{true, true},
clientset: fake.NewSimpleClientset(&v1.NodeList{Items: []v1.Node{node1, node2}}),
},
// single cidr
// 2 nodes, routes already there
{
nodes: []*v1.Node{
@ -237,9 +359,16 @@ func TestReconcile(t *testing.T) {
if !ok {
t.Error("Error in test: fakecloud doesn't support Routes()")
}
cidrs := make([]*net.IPNet, 0)
_, cidr, _ := net.ParseCIDR("10.120.0.0/16")
cidrs = append(cidrs, cidr)
if testCase.dualStack {
_, cidrv6, _ := net.ParseCIDR("ace:cab:deca::/8")
cidrs = append(cidrs, cidrv6)
}
informerFactory := informers.NewSharedInformerFactory(testCase.clientset, controller.NoResyncPeriodFunc())
rc := New(routes, testCase.clientset, informerFactory.Core().V1().Nodes(), cluster, cidr)
rc := New(routes, testCase.clientset, informerFactory.Core().V1().Nodes(), cluster, cidrs)
rc.nodeListerSynced = alwaysReady
if err := rc.reconcile(testCase.nodes, testCase.initialRoutes); err != nil {
t.Errorf("%d. Error from rc.reconcile(): %v", i, err)
@ -284,7 +413,7 @@ func TestReconcile(t *testing.T) {
break poll
}
case <-timeoutChan:
t.Errorf("%d. rc.reconcile() = %v, routes:\n%v\nexpected: nil, routes:\n%v\n", i, err, flatten(finalRoutes), flatten(testCase.expectedRoutes))
t.Errorf("%d. rc.reconcile() = %v,\nfound routes:\n%v\nexpected routes:\n%v\n", i, err, flatten(finalRoutes), flatten(testCase.expectedRoutes))
break poll
}
}
@ -295,16 +424,22 @@ func routeListEqual(list1, list2 []*cloudprovider.Route) bool {
if len(list1) != len(list2) {
return false
}
routeMap1 := make(map[string]*cloudprovider.Route)
// nodename+cidr:bool
seen := make(map[string]bool)
for _, route1 := range list1 {
routeMap1[route1.Name] = route1
}
for _, route2 := range list2 {
if route1, exists := routeMap1[route2.Name]; !exists || *route1 != *route2 {
return false
for _, route2 := range list2 {
if route1.DestinationCIDR == route2.DestinationCIDR && route1.TargetNode == route2.TargetNode {
seen[string(route1.TargetNode)+route1.DestinationCIDR] = true
break
}
}
}
return true
if len(seen) == len(list1) {
return true
}
return false
}
func flatten(list []*cloudprovider.Route) []cloudprovider.Route {

18
staging/src/k8s.io/cloud-provider/fake/fake.go
View File

@ -343,7 +343,7 @@ func (f *Cloud) CreateRoute(ctx context.Context, clusterName string, nameHint st
f.Lock.Lock()
defer f.Lock.Unlock()
f.addCall("create-route")
name := clusterName + "-" + nameHint
name := clusterName + "-" + string(route.TargetNode) + "-" + route.DestinationCIDR
if _, exists := f.RouteMap[name]; exists {
f.Err = fmt.Errorf("route %q already exists", name)
return f.Err
@ -362,11 +362,21 @@ func (f *Cloud) DeleteRoute(ctx context.Context, clusterName string, route *clou
f.Lock.Lock()
defer f.Lock.Unlock()
f.addCall("delete-route")
name := route.Name
if _, exists := f.RouteMap[name]; !exists {
f.Err = fmt.Errorf("no route found with name %q", name)
name := ""
for key, saved := range f.RouteMap {
if route.DestinationCIDR == saved.Route.DestinationCIDR &&
route.TargetNode == saved.Route.TargetNode &&
clusterName == saved.ClusterName {
name = key
break
}
}
if len(name) == 0 {
f.Err = fmt.Errorf("no route found for node:%v with DestinationCIDR== %v", route.TargetNode, route.DestinationCIDR)
return f.Err
}
delete(f.RouteMap, name)
return nil
}

25
staging/src/k8s.io/legacy-cloud-providers/azure/azure_backoff.go
View File

@ -117,6 +117,31 @@ func (az *Cloud) ListVirtualMachines(resourceGroup string) ([]compute.VirtualMac
return az.ListVirtualMachinesWithRetry(resourceGroup)
}
// getPrivateIPsForMachine is wrapper for optional backoff getting private ips
// list of a node by name
func (az *Cloud) getPrivateIPsForMachine(nodeName types.NodeName) ([]string, error) {
if az.Config.shouldOmitCloudProviderBackoff() {
return az.vmSet.GetPrivateIPsByNodeName(string(nodeName))
}
return az.getPrivateIPsForMachineWithRetry(nodeName)
}
func (az *Cloud) getPrivateIPsForMachineWithRetry(nodeName types.NodeName) ([]string, error) {
var privateIPs []string
err := wait.ExponentialBackoff(az.requestBackoff(), func() (bool, error) {
var retryErr error
privateIPs, retryErr = az.vmSet.GetPrivateIPsByNodeName(string(nodeName))
if retryErr != nil {
klog.Errorf("GetPrivateIPsByNodeName(%s): backoff failure, will retry,err=%v", nodeName, retryErr)
return false, nil
}
klog.V(2).Infof("GetPrivateIPsByNodeName(%s): backoff success", nodeName)
return true, nil
})
return privateIPs, err
}
func (az *Cloud) getIPForMachine(nodeName types.NodeName) (string, string, error) {
if az.Config.shouldOmitCloudProviderBackoff() {
return az.vmSet.GetIPByNodeName(string(nodeName))

4
staging/src/k8s.io/legacy-cloud-providers/azure/azure_fakes.go
View File

@ -879,6 +879,10 @@ func (f *fakeVMSet) GetInstanceTypeByNodeName(name string) (string, error) {
return "", fmt.Errorf("unimplemented")
}
func (f *fakeVMSet) GetPrivateIPsByNodeName(nodeName string) ([]string, error) {
return []string{}, fmt.Errorf("unimplemented")
}
func (f *fakeVMSet) GetIPByNodeName(name string) (string, string, error) {
ip, found := f.NodeToIP[name]
if !found {

2
staging/src/k8s.io/legacy-cloud-providers/azure/azure_loadbalancer_test.go
View File

@ -175,7 +175,7 @@ func TestFindRule(t *testing.T) {
{
Name: to.StringPtr("probe1"),
LoadBalancingRulePropertiesFormat: &network.LoadBalancingRulePropertiesFormat{
LoadDistribution: network.Default,
LoadDistribution: network.SourceIP,
},
},
},

86
staging/src/k8s.io/legacy-cloud-providers/azure/azure_routes.go
View File

@ -19,6 +19,7 @@ package azure
import (
"context"
"fmt"
"strings"
"github.com/Azure/azure-sdk-for-go/services/network/mgmt/2018-08-01/network"
"github.com/Azure/go-autorest/autorest/to"
@ -26,6 +27,20 @@ import (
"k8s.io/apimachinery/pkg/types"
cloudprovider "k8s.io/cloud-provider"
"k8s.io/klog"
utilnet "k8s.io/utils/net"
// Azure route controller changes behavior if ipv6dual stack feature is turned on
// remove this once the feature graduates
utilfeature "k8s.io/apiserver/pkg/util/feature"
"k8s.io/component-base/featuregate"
)
// copied to minimize the number of cross reference
// and exceptions in publishing and allowed imports.
const (
IPv6DualStack featuregate.Feature = "IPv6DualStack"
routeNameFmt = "%s____%s"
routeNameSeparator = "____"
)
// ListRoutes lists all managed routes that belong to the specified clusterName
@ -119,12 +134,17 @@ func (az *Cloud) createRouteTable() error {
// to create a more user-meaningful name.
func (az *Cloud) CreateRoute(ctx context.Context, clusterName string, nameHint string, kubeRoute *cloudprovider.Route) error {
// Returns for unmanaged nodes because azure cloud provider couldn't fetch information for them.
var targetIP string
nodeName := string(kubeRoute.TargetNode)
unmanaged, err := az.IsNodeUnmanaged(nodeName)
if err != nil {
return err
}
if unmanaged {
if utilfeature.DefaultFeatureGate.Enabled(IPv6DualStack) {
//TODO (khenidak) add support for unmanaged nodes when the feature reaches beta
return fmt.Errorf("unmanaged nodes are not supported in dual stack mode")
}
klog.V(2).Infof("CreateRoute: omitting unmanaged node %q", kubeRoute.TargetNode)
az.routeCIDRsLock.Lock()
defer az.routeCIDRsLock.Unlock()
@ -136,12 +156,29 @@ func (az *Cloud) CreateRoute(ctx context.Context, clusterName string, nameHint s
if err := az.createRouteTableIfNotExists(clusterName, kubeRoute); err != nil {
return err
}
targetIP, _, err := az.getIPForMachine(kubeRoute.TargetNode)
if err != nil {
return err
}
if !utilfeature.DefaultFeatureGate.Enabled(IPv6DualStack) {
targetIP, _, err = az.getIPForMachine(kubeRoute.TargetNode)
if err != nil {
return err
}
} else {
// for dual stack we need to select
// a private ip that matches family of the cidr
klog.V(4).Infof("CreateRoute: create route instance=%q cidr=%q is in dual stack mode", kubeRoute.TargetNode, kubeRoute.DestinationCIDR)
CIDRv6 := utilnet.IsIPv6CIDRString(string(kubeRoute.DestinationCIDR))
nodePrivateIPs, err := az.getPrivateIPsForMachine(kubeRoute.TargetNode)
if nil != err {
klog.V(3).Infof("CreateRoute: create route: failed(GetPrivateIPsByNodeName) instance=%q cidr=%q with error=%v", kubeRoute.TargetNode, kubeRoute.DestinationCIDR, err)
return err
}
routeName := mapNodeNameToRouteName(kubeRoute.TargetNode)
targetIP, err = findFirstIPByFamily(nodePrivateIPs, CIDRv6)
if nil != err {
klog.V(3).Infof("CreateRoute: create route: failed(findFirstIpByFamily) instance=%q cidr=%q with error=%v", kubeRoute.TargetNode, kubeRoute.DestinationCIDR, err)
return err
}
}
routeName := mapNodeNameToRouteName(kubeRoute.TargetNode, string(kubeRoute.DestinationCIDR))
route := network.Route{
Name: to.StringPtr(routeName),
RoutePropertiesFormat: &network.RoutePropertiesFormat{
@ -180,7 +217,7 @@ func (az *Cloud) DeleteRoute(ctx context.Context, clusterName string, kubeRoute
klog.V(2).Infof("DeleteRoute: deleting route. clusterName=%q instance=%q cidr=%q", clusterName, kubeRoute.TargetNode, kubeRoute.DestinationCIDR)
routeName := mapNodeNameToRouteName(kubeRoute.TargetNode)
routeName := mapNodeNameToRouteName(kubeRoute.TargetNode, string(kubeRoute.DestinationCIDR))
err = az.DeleteRouteWithName(routeName)
if err != nil {
return err
@ -194,11 +231,42 @@ func (az *Cloud) DeleteRoute(ctx context.Context, clusterName string, kubeRoute
// 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)
func mapNodeNameToRouteName(nodeName types.NodeName, cidr string) string {
if !utilfeature.DefaultFeatureGate.Enabled(IPv6DualStack) {
return fmt.Sprintf("%s", nodeName)
}
return fmt.Sprintf(routeNameFmt, nodeName, cidrtoRfc1035(cidr))
}
// Used with mapNodeNameToRouteName. See comment on mapNodeNameToRouteName.
func mapRouteNameToNodeName(routeName string) types.NodeName {
return types.NodeName(fmt.Sprintf("%s", routeName))
if !utilfeature.DefaultFeatureGate.Enabled(IPv6DualStack) {
return types.NodeName(fmt.Sprintf("%s", routeName))
}
parts := strings.Split(routeName, routeNameSeparator)
nodeName := parts[0]
return types.NodeName(nodeName)
}
// given a list of ips, return the first one
// that matches the family requested
// error if no match, or failure to parse
// any of the ips
func findFirstIPByFamily(ips []string, v6 bool) (string, error) {
for _, ip := range ips {
bIPv6 := utilnet.IsIPv6String(ip)
if v6 == bIPv6 {
return ip, nil
}
}
return "", fmt.Errorf("no match found matching the ipfamily requested")
}
//strips : . /
func cidrtoRfc1035(cidr string) string {
cidr = strings.ReplaceAll(cidr, ":", "")
cidr = strings.ReplaceAll(cidr, ".", "")
cidr = strings.ReplaceAll(cidr, "/", "")
return cidr
}

43
staging/src/k8s.io/legacy-cloud-providers/azure/azure_routes_test.go
View File

@ -27,6 +27,8 @@ import (
"github.com/Azure/azure-sdk-for-go/services/network/mgmt/2018-08-01/network"
"github.com/Azure/go-autorest/autorest/to"
"github.com/stretchr/testify/assert"
"k8s.io/apimachinery/pkg/types"
)
func TestDeleteRoute(t *testing.T) {
@ -43,7 +45,7 @@ func TestDeleteRoute(t *testing.T) {
nodeInformerSynced: func() bool { return true },
}
route := cloudprovider.Route{TargetNode: "node", DestinationCIDR: "1.2.3.4/24"}
routeName := mapNodeNameToRouteName(route.TargetNode)
routeName := mapNodeNameToRouteName(route.TargetNode, route.DestinationCIDR)
fakeRoutes.FakeStore = map[string]map[string]network.Route{
cloud.RouteTableName: {
@ -134,7 +136,7 @@ func TestCreateRoute(t *testing.T) {
t.Errorf("unexpected calls create if not exists, exists: %v", fakeTable.Calls)
}
routeName := mapNodeNameToRouteName(route.TargetNode)
routeName := mapNodeNameToRouteName(route.TargetNode, string(route.DestinationCIDR))
routeInfo, found := fakeRoutes.FakeStore[cloud.RouteTableName][routeName]
if !found {
t.Errorf("could not find route: %v in %v", routeName, fakeRoutes.FakeStore)
@ -390,3 +392,40 @@ func TestProcessRoutes(t *testing.T) {
}
}
}
func errorNotNil(t *testing.T, err error) {
if nil != err {
t.Errorf("%s: failure error: %v", t.Name(), err)
}
}
func TestFindFirstIPByFamily(t *testing.T) {
firstIPv4 := "10.0.0.1"
firstIPv6 := "2001:1234:5678:9abc::9"
ips := []string{
firstIPv4,
"11.0.0.1",
firstIPv6,
"fda4:6dee:effc:62a0:0:0:0:0",
}
outIPV4, err := findFirstIPByFamily(ips, false)
errorNotNil(t, err)
assert.Equal(t, outIPV4, firstIPv4)
outIPv6, err := findFirstIPByFamily(ips, true)
errorNotNil(t, err)
assert.Equal(t, outIPv6, firstIPv6)
}
func TestRouteNameFuncs(t *testing.T) {
v4CIDR := "10.0.0.1/16"
v6CIDR := "fd3e:5f02:6ec0:30ba::/64"
nodeName := "thisNode"
routeName := mapNodeNameToRouteName(types.NodeName(nodeName), v4CIDR)
outNodeName := mapRouteNameToNodeName(routeName)
assert.Equal(t, string(outNodeName), nodeName)
routeName = mapNodeNameToRouteName(types.NodeName(nodeName), v6CIDR)
outNodeName = mapRouteNameToNodeName(routeName)
assert.Equal(t, string(outNodeName), nodeName)
}

23
staging/src/k8s.io/legacy-cloud-providers/azure/azure_standard.go
View File

@ -460,6 +460,29 @@ func (as *availabilitySet) GetIPByNodeName(name string) (string, string, error)
return privateIP, publicIP, nil
}
// returns a list of private ips assigned to node
// TODO (khenidak): This should read all nics, not just the primary
// allowing users to split ipv4/v6 on multiple nics
func (as *availabilitySet) GetPrivateIPsByNodeName(name string) ([]string, error) {
ips := make([]string, 0)
nic, err := as.GetPrimaryInterface(name)
if err != nil {
return ips, err
}
if nic.IPConfigurations == nil {
return ips, fmt.Errorf("nic.IPConfigurations for nic (nicname=%q) is nil", *nic.Name)
}
for _, ipConfig := range *(nic.IPConfigurations) {
if ipConfig.PrivateIPAddress != nil {
ips = append(ips, *(ipConfig.PrivateIPAddress))
}
}
return ips, nil
}
// getAgentPoolAvailabiliySets lists the virtual machines for the resource group and then builds
// a list of availability sets that match the nodes available to k8s.
func (as *availabilitySet) getAgentPoolAvailabiliySets(nodes []*v1.Node) (agentPoolAvailabilitySets *[]string, err error) {

3
staging/src/k8s.io/legacy-cloud-providers/azure/azure_vmsets.go
View File

@ -72,4 +72,7 @@ type VMSet interface {
// GetPowerStatusByNodeName returns the power state of the specified node.
GetPowerStatusByNodeName(name string) (string, error)
// GetPrivateIPsByNodeName returns a slice of all private ips assigned to node (ipv6 and ipv4)
GetPrivateIPsByNodeName(name string) ([]string, error)
}

24
staging/src/k8s.io/legacy-cloud-providers/azure/azure_vmss.go
View File

@ -335,6 +335,30 @@ func (ss *scaleSet) GetIPByNodeName(nodeName string) (string, string, error) {
return internalIP, publicIP, nil
}
// returns a list of private ips assigned to node
// TODO (khenidak): This should read all nics, not just the primary
// allowing users to split ipv4/v6 on multiple nics
func (ss *scaleSet) GetPrivateIPsByNodeName(nodeName string) ([]string, error) {
ips := make([]string, 0)
nic, err := ss.GetPrimaryInterface(nodeName)
if err != nil {
klog.Errorf("error: ss.GetIPByNodeName(%s), GetPrimaryInterface(%q), err=%v", nodeName, nodeName, err)
return ips, err
}
if nic.IPConfigurations == nil {
return ips, fmt.Errorf("nic.IPConfigurations for nic (nicname=%q) is nil", *nic.Name)
}
for _, ipConfig := range *(nic.IPConfigurations) {
if ipConfig.PrivateIPAddress != nil {
ips = append(ips, *(ipConfig.PrivateIPAddress))
}
}
return ips, nil
}
// This returns the full identifier of the primary NIC for the given VM.
func (ss *scaleSet) getPrimaryInterfaceID(machine compute.VirtualMachineScaleSetVM) (string, error) {
if len(*machine.NetworkProfile.NetworkInterfaces) == 1 {

1
staging/src/k8s.io/legacy-cloud-providers/gce/gce_routes.go
View File

@ -74,6 +74,7 @@ func (g *Cloud) CreateRoute(ctx context.Context, clusterName string, nameHint st
return mc.Observe(err)
}
cr := &compute.Route{
// TODO(thockin): generate a unique name for node + route cidr. Don't depend on name hints.
Name: truncateClusterName(clusterName) + "-" + nameHint,
DestRange: route.DestinationCIDR,
NextHopInstance: fmt.Sprintf("zones/%s/instances/%s", targetInstance.Zone, targetInstance.Name),