8234

Committed 23 Nov 2023 06:48PM UTC coverage: 53.808% (-0.07%) from 53.873%

Build # 8234

Build Type

push

travis-pro

Committed by

web-flow

Commit Message

Merge pull request #1202 from noironetworks/platformconfig

Inform opflex-agent that opflexOdev is deleted

Run Details

26 of 110 new or added lines in 6 files covered. (23.64%)

1 existing line in 1 file now uncovered.

13275 of 24671 relevant lines covered (53.81%)

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67.77

/pkg/controller/nodes.go

// Copyright 2017 Cisco Systems, Inc.
//
// 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.

// Handlers for node updates.

package controller

import (
        "crypto/rand"
        "encoding/json"
        "errors"
        "fmt"
        "net"
        "net/http"

        v1 "k8s.io/api/core/v1"
        kubeerr "k8s.io/apimachinery/pkg/api/errors"
        metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
        "k8s.io/apimachinery/pkg/fields"
        "k8s.io/apimachinery/pkg/labels"
        "k8s.io/client-go/kubernetes"
        "k8s.io/client-go/tools/cache"

        "github.com/sirupsen/logrus"

        "github.com/noironetworks/aci-containers/pkg/apicapi"
        crdv1 "github.com/noironetworks/aci-containers/pkg/gbpcrd/apis/acipolicy/v1"
        "github.com/noironetworks/aci-containers/pkg/gbpserver/watchers"
        "github.com/noironetworks/aci-containers/pkg/ipam"
        "github.com/noironetworks/aci-containers/pkg/metadata"
        nodePodIf "github.com/noironetworks/aci-containers/pkg/nodepodif/apis/acipolicy/v1"
        "github.com/noironetworks/aci-containers/pkg/util"
)

const (
        tunnelIDIncr = 2
)

type tunnelState struct {
        stateDriver  *watchers.K8sStateDriver
        nodeToTunnel map[string]int64
        nextID       int64
}

func (cont *AciController) initNodeInformerFromClient(
        kubeClient *kubernetes.Clientset) {
        cont.initNodeInformerBase(
                cache.NewListWatchFromClient(
                        kubeClient.CoreV1().RESTClient(), "nodes",
                        metav1.NamespaceAll, fields.Everything()))
}

func (cont *AciController) initNodeInformerBase(listWatch *cache.ListWatch) {
        cont.nodeIndexer, cont.nodeInformer = cache.NewIndexerInformer(
                listWatch, &v1.Node{}, 0,
                cache.ResourceEventHandlerFuncs{
                        AddFunc: func(obj interface{}) {
                                cont.syncPodNet(obj) // update cache
                                cont.nodeChanged(obj)
                        },
                        UpdateFunc: func(_ interface{}, obj interface{}) {
                                cont.nodeChanged(obj)
                        },
                        DeleteFunc: func(obj interface{}) {
                                cont.nodeDeleted(obj)
                        },
                },
                cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc},
        )
}

func apicNodeNetPol(name string, tenantName string,
        nodeIps map[string]bool) apicapi.ApicObject {
        hpp := apicapi.NewHostprotPol(tenantName, name)
        hppDn := hpp.GetDn()
        nodeSubj := apicapi.NewHostprotSubj(hppDn, "local-node")
        if len(nodeIps) > 0 {
                nodeSubjDn := nodeSubj.GetDn()
                outbound := apicapi.NewHostprotRule(nodeSubjDn, "allow-all-egress")
                outbound.SetAttr("direction", "egress")
                outbound.SetAttr("ethertype", "ipv4")
                outbound.SetAttr("connTrack", "normal")

                inbound := apicapi.NewHostprotRule(nodeSubjDn, "allow-all-ingress")
                inbound.SetAttr("direction", "ingress")
                inbound.SetAttr("ethertype", "ipv4")
                inbound.SetAttr("connTrack", "normal")

                for ip := range nodeIps {
                        outbound.AddChild(apicapi.NewHostprotRemoteIp(outbound.GetDn(), ip))
                        inbound.AddChild(apicapi.NewHostprotRemoteIp(inbound.GetDn(), ip))
                }

                nodeSubj.AddChild(inbound)
                nodeSubj.AddChild(outbound)
        }
        hpp.AddChild(nodeSubj)
        return hpp
}

func (cont *AciController) createNetPolForNode(node *v1.Node) {
        nodeIps := make(map[string]bool)
        for _, a := range node.Status.Addresses {
                if a.Address != "" &&
                        (a.Type == "InternalIP" || a.Type == "ExternalIP") {
                        nodeIps[a.Address] = true
                }
        }

        sgName := cont.aciNameForKey("node", node.Name)
        cont.apicConn.WriteApicObjects(sgName,
                apicapi.ApicSlice{
                        apicNodeNetPol(sgName, cont.config.AciPolicyTenant, nodeIps),
                })
}

func (cont *AciController) createServiceEndpoint(existing, ep *metadata.ServiceEndpoint, deviceMac, nodeName string) error {
        _, err := net.ParseMAC(deviceMac)
        if err == nil && deviceMac != "00:00:00:00:00:00" {
                ep.Mac = deviceMac
        } else {
                _, err := net.ParseMAC(existing.Mac)
                if err == nil {
                        ep.Mac = existing.Mac
                } else {
                        var mac net.HardwareAddr = make([]byte, 6)
                        _, err := rand.Read(mac)
                        if err != nil {
                                return err
                        }

                        mac[0] = (mac[0] & 254) | 2
                        ep.Mac = mac.String()
                }
        }

        if ep.Ipv4 == nil && existing.Ipv4 != nil &&
                cont.nodeServiceIps.V4.RemoveIp(existing.Ipv4) {
                ep.Ipv4 = existing.Ipv4
        }

        if ep.Ipv4 == nil {
                ipv4, err := cont.nodeServiceIps.V4.GetIp()
                if err == nil {
                        ep.Ipv4 = ipv4
                } else {
                        ep.Ipv4 = nil
                }
        }

        if ep.Ipv6 == nil && existing.Ipv6 != nil &&
                cont.nodeServiceIps.V6.RemoveIp(existing.Ipv6) {
                ep.Ipv6 = existing.Ipv6
        }

        if ep.Ipv6 == nil {
                ipv6, err := cont.nodeServiceIps.V6.GetIp()
                if err == nil {
                        ep.Ipv6 = ipv6
                } else {
                        ep.Ipv6 = nil
                }
        }

        if ep.Ipv4 == nil && ep.Ipv6 == nil {
                return errors.New("No IP addresses available for service endpoint")
        }

        if (ep.HealthGroupDn == "") && (cont.config.AciServiceMonitorInterval > 0) {
                name := cont.aciNameForKey("svc", nodeName)
                healthGroupObj := apicapi.NewVnsRedirectHealthGroup(cont.config.AciVrfTenant, name)
                ep.HealthGroupDn = healthGroupObj.GetDn()
                cont.apicConn.WriteApicObjects(name, apicapi.ApicSlice{healthGroupObj})
        }

        return nil
}

func (cont *AciController) nodeFullSync() {
        cache.ListAll(cont.nodeIndexer, labels.Everything(),
                func(nodeobj interface{}) {
                        cont.syncPodNet(nodeobj) // update the cache
                        cont.nodeChanged(nodeobj)
                })
}

// syncPodNet syncs in the podnets from the node object's annotation
func (cont *AciController) syncPodNet(obj interface{}) {
        cont.indexMutex.Lock()
        defer cont.indexMutex.Unlock()

        node := obj.(*v1.Node)
        logger := cont.log.WithFields(logrus.Fields{
                "Node": node.ObjectMeta.Name,
        })

        if node.ObjectMeta.Annotations == nil {
                return // nothing to sync
        }

        netval, ok := node.ObjectMeta.Annotations[metadata.PodNetworkRangeAnnotation]
        if !ok {
                return // nothing to sync
        }

        nodePodNet := newNodePodNetMeta()
        cont.mergePodNet(nodePodNet, netval, logger)
        cont.nodePodNetCache[node.ObjectMeta.Name] = nodePodNet
}

func maxof(x1, x2 int64) int64 {
        if x1 > x2 {
                return x1
        }

        return x2
}

func (cont *AciController) getTunnelID(node *v1.Node) int64 {
        if cont.config.LBType == lbTypeAci {
                return 0
        }

        nodeIP := getNodeIP(node, v1.NodeInternalIP)
        if nodeIP == "" {
                cont.log.Errorf("Can't get IP for node %s", node.Name)
                return 0
        }

        if cont.tunnelGetter == nil {
                tunnelGetter := &tunnelState{}
                tunnelGetter.stateDriver = &watchers.K8sStateDriver{}
                err := tunnelGetter.stateDriver.Init(watchers.FieldTunnelID)
                if err != nil {
                        cont.log.Warnf("Can't get tunnelID for %s", node.Name)
                        return 0
                }

                gbps, err := tunnelGetter.stateDriver.Get()
                if err != nil {
                        cont.log.Warnf("Can't get tunnelID for %s", node.Name)
                        return 0
                }

                cont.tunnelGetter = tunnelGetter
                if gbps.Status.TunnelIDs == nil {
                        cont.log.Infof("Initializing tunnelIDs")
                        tunnelGetter.nodeToTunnel = make(map[string]int64)
                        cont.tunnelGetter.nextID = 0
                } else {
                        tunnelGetter.nodeToTunnel = gbps.Status.TunnelIDs
                        for _, val := range tunnelGetter.nodeToTunnel {
                                cont.tunnelGetter.nextID = maxof(cont.tunnelGetter.nextID, val)
                        }

                        cont.tunnelGetter.nextID += tunnelIDIncr
                }
        }

        id, found := cont.tunnelGetter.nodeToTunnel[nodeIP]
        if found {
                return id + int64(cont.config.CSRTunnelIDBase)
        }

        id = cont.tunnelGetter.nextID
        if id >= int64(cont.config.MaxCSRTunnels*tunnelIDIncr) {
                cont.log.Infof("Max tunnels %d reached", cont.config.MaxCSRTunnels)
                return 0
        }

        // each allocated id packs two tunnels.
        cont.tunnelGetter.nodeToTunnel[nodeIP] = id
        cont.tunnelGetter.nextID = id + tunnelIDIncr
        state := &crdv1.GBPSState{}
        state.Status.TunnelIDs = cont.tunnelGetter.nodeToTunnel
        cont.tunnelGetter.stateDriver.Update(state)
        return id + int64(cont.config.CSRTunnelIDBase)
}

func (cont *AciController) writeApicNode(node *v1.Node) {
        if cont.config.ChainedMode {
                return
        }
        tunnelID := cont.getTunnelID(node)
        key := cont.aciNameForKey("node-vmm", node.Name)
        aobj := apicapi.NewVmmInjectedHost(cont.vmmDomainProvider(),
                cont.config.AciVmmDomain, cont.config.AciVmmController,
                node.Name)
        aobj.SetAttr("mgmtIp", getNodeIP(node, v1.NodeInternalIP))
        aobj.SetAttr("os", node.Status.NodeInfo.OSImage)
        aobj.SetAttr("kernelVer", node.Status.NodeInfo.KernelVersion)
        if apicapi.ApicVersion >= "5.0" {
                aobj.SetAttr("id", fmt.Sprintf("%v", tunnelID))
        }
        cont.apicConn.WriteApicObjects(key, apicapi.ApicSlice{aobj})
}

func getNodeIP(node *v1.Node, aType v1.NodeAddressType) string {
        for _, a := range node.Status.Addresses {
                if a.Type == aType {
                        return a.Address
                }
        }

        return ""
}

func (cont *AciController) nodeChangedByName(nodeName string) {
        node, exists, err := cont.nodeIndexer.GetByKey(nodeName)
        if err != nil {
                cont.log.Error("Could not lookup node: ", err)
                return
        }
        if exists && node != nil {
                cont.nodeChanged(node)
        }
}

func (cont *AciController) nodeChanged(obj interface{}) {
        if cont.config.ChainedMode {
                return
        }
        cont.indexMutex.Lock()

        node := obj.(*v1.Node)
        logger := cont.log.WithFields(logrus.Fields{
                "Node": node.ObjectMeta.Name,
        })

        nodeUpdated := false
        if node.ObjectMeta.Annotations == nil {
                node.ObjectMeta.Annotations = make(map[string]string)
        }

        nodeMeta, metaok := cont.nodeServiceMetaCache[node.ObjectMeta.Name]
        epval, epok := node.ObjectMeta.Annotations[metadata.ServiceEpAnnotation]
        deviceMac, hasDevice := cont.deviceMacForNode(node.ObjectMeta.Name)

        if cont.nodeSyncEnabled && hasDevice {
                if !metaok {
                        nodeMeta = &nodeServiceMeta{}
                        cont.nodeServiceMetaCache[node.ObjectMeta.Name] = nodeMeta
                }

                existing := &metadata.ServiceEndpoint{}
                if epok {
                        err := json.Unmarshal([]byte(epval), existing)
                        if err != nil {
                                logger.WithFields(logrus.Fields{
                                        "epval": epval,
                                }).Warn("Could not parse existing node ",
                                        "service endpoint annotation: ", err)
                        }
                }

                cont.createServiceEndpoint(existing, &nodeMeta.serviceEp, deviceMac, node.ObjectMeta.Name)
                raw, err := json.Marshal(&nodeMeta.serviceEp)
                if err != nil {
                        logger.Error("Could not create node service endpoint annotation", err)
                } else {
                        serviceEpAnnotation := string(raw)
                        if !epok || serviceEpAnnotation != epval {
                                node.ObjectMeta.Annotations[metadata.ServiceEpAnnotation] =
                                        serviceEpAnnotation
                                nodeUpdated = true
                                cont.updateServicesForNode(node.ObjectMeta.Name)
                                cont.snatFullSync()
                        }
                }
        }

        nodePodNet, ok := cont.nodePodNetCache[node.ObjectMeta.Name]
        if !ok {
                nodePodNet = newNodePodNetMeta()
                cont.nodePodNetCache[node.ObjectMeta.Name] = nodePodNet
        }

        netval := node.ObjectMeta.Annotations[metadata.PodNetworkRangeAnnotation]
        if cont.nodeSyncEnabled {
                cont.checkNodePodNet(node.ObjectMeta.Name)
                if netval != nodePodNet.podNetIpsAnnotation {
                        logger.Debug("Overwriting existing pod network: ", netval)
                        node.ObjectMeta.Annotations[metadata.PodNetworkRangeAnnotation] =
                                nodePodNet.podNetIpsAnnotation
                        nodeUpdated = true
                }
        }

        nodeAciPodAnnotation, ok := cont.nodeACIPodAnnot[node.ObjectMeta.Name]
        if ok {
                nodeAciPod := nodeAciPodAnnotation.aciPod
                aciPodAnn := node.ObjectMeta.Annotations[metadata.NodeAciPodAnnotation]
                if cont.nodeSyncEnabled {
                        if aciPodAnn != nodeAciPod && nodeAciPod != "" {
                                node.ObjectMeta.Annotations[metadata.NodeAciPodAnnotation] = nodeAciPod
                                nodeUpdated = true
                        }
                }
        } else {
                var annot aciPodAnnot
                cont.nodeACIPodAnnot[node.ObjectMeta.Name] = annot
        }

        if cont.config.AciMultipod {
                nodeAciPodAnnot, ok := cont.nodeACIPod[node.ObjectMeta.Name]
                if ok {
                        nodeAciPod := nodeAciPodAnnot.aciPod
                        aciPodAnn := node.ObjectMeta.Annotations[metadata.AciPodAnnotation]
                        if cont.nodeSyncEnabled {
                                if aciPodAnn != nodeAciPod && nodeAciPod != "" {
                                        node.ObjectMeta.Annotations[metadata.AciPodAnnotation] = nodeAciPod
                                        nodeUpdated = true
                                }
                        }
                } else {
                        var annot aciPodAnnot
                        cont.nodeACIPod[node.ObjectMeta.Name] = annot
                }
        }
        cont.indexMutex.Unlock()

        cont.createNetPolForNode(node)
        cont.writeApicNode(node)

        if nodeUpdated {
                _, err := cont.updateNode(node)
                if err != nil {
                        var serr *kubeerr.StatusError
                        if errors.As(err, &serr) {
                                if serr.ErrStatus.Code == http.StatusConflict {
                                        logger.Debug("Conflict updating node; ",
                                                "will retry on next update")
                                        return
                                }
                        }
                        logger.Error("Failed to update node: ", err)
                } else {
                        logger.WithFields(logrus.Fields{
                                "ServiceEpAnnotation": node.
                                        ObjectMeta.Annotations[metadata.ServiceEpAnnotation],
                                "PodNetworkRangeAnnotation": node.
                                        ObjectMeta.Annotations[metadata.PodNetworkRangeAnnotation],
                        }).Info("Updated node annotations")
                }
        }
}

func (cont *AciController) nodeDeleted(obj interface{}) {
        if cont.config.ChainedMode {
                return
        }
        node, isNode := obj.(*v1.Node)
        if !isNode {
                deletedState, ok := obj.(cache.DeletedFinalStateUnknown)
                if !ok {
                        cont.log.Error("Received unexpected object: ", obj)
                        return
                }
                node, ok = deletedState.Obj.(*v1.Node)
                if !ok {
                        cont.log.Error("DeletedFinalStateUnknown contained non-Node object: ", deletedState.Obj)
                        return
                }
        }
        cont.apicConn.ClearApicObjects(cont.aciNameForKey("node", node.Name))
        cont.apicConn.ClearApicObjects(cont.aciNameForKey("node-vmm", node.Name))
        cont.log.Infof("Node deleted: %s", node.ObjectMeta.Name)

        cont.indexMutex.Lock()
        defer cont.indexMutex.Unlock()

        if existing, ok := cont.nodeServiceMetaCache[node.ObjectMeta.Name]; ok {
                if existing.serviceEp.Ipv4 != nil {
                        cont.nodeServiceIps.V4.AddIp(existing.serviceEp.Ipv4)
                }
                if existing.serviceEp.Ipv6 != nil {
                        cont.nodeServiceIps.V6.AddIp(existing.serviceEp.Ipv6)
                }
        }
        delete(cont.nodeServiceMetaCache, node.ObjectMeta.Name)
        cont.updateServicesForNode(node.ObjectMeta.Name)
        cont.snatFullSync()
        if _, ok := cont.snatNodeInfoCache[node.ObjectMeta.Name]; ok {
                env := cont.env.(*K8sEnvironment)
                nodeinfocl := env.nodeInfoClient
                //TODO Add reconcile here on failure
                if nodeinfocl != nil {
                        err := util.DeleteNodeInfoCR(*nodeinfocl, node.ObjectMeta.Name)
                        if err != nil {
                                cont.log.Error("Could not delete the NodeInfo", node.ObjectMeta.Name)
                                return
                        }
                        cont.log.Debug("Successfully Deleted NodeInfoCR for node: ", node.ObjectMeta.Name)
                }
                nodeinfo := cont.snatNodeInfoCache[node.ObjectMeta.Name]
                delete(cont.snatNodeInfoCache, node.ObjectMeta.Name)
                cont.log.Debug("Node deleted from snatNodeInfoCache: ", node.ObjectMeta.Name)
                nodeinfokey, _ := cache.MetaNamespaceKeyFunc(nodeinfo)
                cont.queueNodeInfoUpdateByKey(nodeinfokey)
        }

        if podnet, ok := cont.nodePodNetCache[node.ObjectMeta.Name]; ok {
                if podnet != nil && cont.podNetworkIps != nil {
                        if cont.podNetworkIps.V4 != nil && podnet.podNetIps.V4 != nil {
                                cont.podNetworkIps.V4.AddRanges(podnet.podNetIps.V4)
                        }
                        if cont.podNetworkIps.V4 != nil && podnet.podNetIps.V6 != nil {
                                cont.podNetworkIps.V6.AddRanges(podnet.podNetIps.V6)
                        }
                }
                delete(cont.nodePodNetCache, node.ObjectMeta.Name)
                cont.log.Debug("Node deleted from nodePodNetCache: ", node.ObjectMeta.Name)
        }

        delete(cont.nodeACIPodAnnot, node.ObjectMeta.Name)
        np, ok := obj.(*nodePodIf.NodePodIF)
        if !ok {
                deletedState, ok := obj.(cache.DeletedFinalStateUnknown)
                if !ok {
                        cont.log.Error("Received unexpected object: ", obj)
                        return
                }
                np, ok = deletedState.Obj.(*nodePodIf.NodePodIF)
                if !ok {
                        cont.log.Error("DeletedFinalStateUnknown contained non-NodePodIF object: ", deletedState.Obj)
                        return
                }
        }
        env := cont.env.(*K8sEnvironment)
        nodepodifc1 := env.nodePodifClient
        if nodepodifc1 != nil {
                err := util.DeleteNodePodIfCR(*nodepodifc1, np.ObjectMeta.Name)
                if err != nil {
                        cont.log.Error("Could not delete the NodePodIF", np.ObjectMeta.Name)
                        return
                }
        }

        if cont.config.AciMultipod {
                delete(cont.nodeACIPod, node.ObjectMeta.Name)
        }
}

// must have index lock
func (cont *AciController) addPodToNode(nodename, key string) {
        existing, ok := cont.nodePodNetCache[nodename]
        if !ok {
                existing = newNodePodNetMeta()
                cont.nodePodNetCache[nodename] = existing
        }
        if _, ok = existing.nodePods[key]; !ok {
                existing.nodePods[key] = true
                cont.checkNodePodNet(nodename)
        }
}

// must have index lock
func (cont *AciController) removePodFromNode(nodename, key string) {
        if existing, ok := cont.nodePodNetCache[nodename]; ok {
                delete(existing.nodePods, key)
                cont.checkNodePodNet(nodename)
        }
}

func (cont *AciController) recomputePodNetAnnotation(podnet *nodePodNetMeta) {
        raw, err := json.Marshal(&podnet.podNetIps)
        if err != nil {
                cont.log.Error("Could not create node pod network ",
                        "annotation", err)
        }
        podnet.podNetIpsAnnotation = string(raw)
}

// must have index lock
func (cont *AciController) mergePodNet(podnet *nodePodNetMeta, existingAnnotation string, logger *logrus.Entry) {
        existing := &metadata.NetIps{}
        err := json.Unmarshal([]byte(existingAnnotation), existing)
        if err != nil {
                cont.log.Error("Could not parse existing pod network ",
                        "annotation", err)
                return
        }

        logger.Debug("Merging existing pod network: ", existingAnnotation)

        {
                v4 := ipam.NewFromRanges(podnet.podNetIps.V4)
                v4.AddRanges(existing.V4)
                annSize := v4.GetSize()

                // validate existing against configured range
                v4 = v4.Intersect(cont.configuredPodNetworkIps.V4)
                if v4.GetSize() != annSize {
                        logger.Warnf("intersect: %+v, config: %+v", v4, cont.configuredPodNetworkIps.V4)
                        logger.Warn("Existing annotation outside configured",
                                "range", existingAnnotation)
                }

                // mark the existing as allocated
                prevSize := cont.podNetworkIps.V4.GetSize()
                cont.podNetworkIps.V4.RemoveRanges(existing.V4)

                // verify allocation was successful
                newSize := cont.podNetworkIps.V4.GetSize()
                if (newSize + annSize) != prevSize {
                        logger.Warn("Existing annotation failed allocation: ",
                                existingAnnotation)
                }

                if len(v4.FreeList) > 0 {
                        podnet.podNetIps.V4 = v4.FreeList
                } else {
                        podnet.podNetIps.V4 = nil
                }
        }

        {
                v6 := ipam.NewFromRanges(podnet.podNetIps.V6)
                v6.AddRanges(existing.V6)
                v6 = v6.Intersect(cont.configuredPodNetworkIps.V6)
                cont.podNetworkIps.V6.RemoveRanges(existing.V6)
                if len(v6.FreeList) > 0 {
                        podnet.podNetIps.V6 = v6.FreeList
                } else {
                        podnet.podNetIps.V6 = nil
                }
        }

        cont.recomputePodNetAnnotation(podnet)
}

func (cont *AciController) allocateIpChunk(podnet *nodePodNetMeta, v4 bool) bool {
        var podnetipam, ipa *ipam.IpAlloc
        changed := false
        if v4 {
                podnetipam = ipam.NewFromRanges(podnet.podNetIps.V4)
                ipa = cont.podNetworkIps.V4
        } else {
                podnetipam = ipam.NewFromRanges(podnet.podNetIps.V6)
                ipa = cont.podNetworkIps.V6
        }
        size := podnetipam.GetSize()
        if int64(len(podnet.nodePods)) >
                size-int64(cont.config.PodIpPoolChunkSize)/2 {
                // we have half a chunk left or less; allocate a new chunk
                r, err := ipa.GetIpChunk(int64(cont.config.PodIpPoolChunkSize))
                if err != nil {
                        cont.log.Error("Could not allocate address chunk: ", err)
                } else {
                        podnetipam.AddRanges(r)
                        if v4 {
                                podnet.podNetIps.V4 = podnetipam.FreeList
                        } else {
                                podnet.podNetIps.V6 = podnetipam.FreeList
                        }
                        cont.recomputePodNetAnnotation(podnet)
                        changed = true
                }
        }
        return changed
}

// must have index lock
func (cont *AciController) checkNodePodNet(nodename string) {
        v4changed, v6changed := false, false
        if podnet, ok := cont.nodePodNetCache[nodename]; ok {
                if !cont.configuredPodNetworkIps.V4.Empty() {
                        v4changed = cont.allocateIpChunk(podnet, true)
                }
                if !cont.configuredPodNetworkIps.V6.Empty() {
                        v6changed = cont.allocateIpChunk(podnet, false)
                }
        }
        if v4changed || v6changed {
                go cont.env.NodePodNetworkChanged(nodename)
        }
}

noironetworks / aci-containers / 8234

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