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services.go
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services.go
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// Copyright 2016 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.
package controller
import (
"errors"
"fmt"
"net"
"reflect"
"sort"
"strconv"
"strings"
"time"
"github.com/noironetworks/aci-containers/pkg/apicapi"
"github.com/noironetworks/aci-containers/pkg/metadata"
"github.com/noironetworks/aci-containers/pkg/util"
"github.com/sirupsen/logrus"
v1 "k8s.io/api/core/v1"
v1beta1 "k8s.io/api/discovery/v1beta1"
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"
)
// Default service contract scope value
const DefaultServiceContractScope = "context"
// Default service ext subnet scope - enable shared security
const DefaultServiceExtSubNetShared = false
func (cont *AciController) initEndpointsInformerFromClient(
kubeClient kubernetes.Interface) {
cont.initEndpointsInformerBase(
cache.NewListWatchFromClient(
kubeClient.CoreV1().RESTClient(), "endpoints",
metav1.NamespaceAll, fields.Everything()))
}
func (cont *AciController) initEndpointSliceInformerFromClient(
kubeClient kubernetes.Interface) {
cont.initEndpointSliceInformerBase(
cache.NewListWatchFromClient(
kubeClient.DiscoveryV1beta1().RESTClient(), "endpointslices",
metav1.NamespaceAll, fields.Everything()))
}
func (cont *AciController) initEndpointSliceInformerBase(listWatch *cache.ListWatch) {
cont.endpointSliceIndexer, cont.endpointSliceInformer = cache.NewIndexerInformer(
listWatch, &v1beta1.EndpointSlice{}, 0,
cache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
cont.endpointSliceAdded(obj)
},
UpdateFunc: func(oldobj interface{}, newobj interface{}) {
cont.endpointSliceUpdated(oldobj, newobj)
},
DeleteFunc: func(obj interface{}) {
cont.endpointSliceDeleted(obj)
},
},
cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc},
)
}
func (cont *AciController) initEndpointsInformerBase(listWatch *cache.ListWatch) {
cont.endpointsIndexer, cont.endpointsInformer = cache.NewIndexerInformer(
listWatch, &v1.Endpoints{}, 0,
cache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
cont.endpointsAdded(obj)
},
UpdateFunc: func(old interface{}, new interface{}) {
cont.endpointsUpdated(old, new)
},
DeleteFunc: func(obj interface{}) {
cont.endpointsDeleted(obj)
},
},
cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc},
)
}
func (cont *AciController) initServiceInformerFromClient(
kubeClient *kubernetes.Clientset) {
cont.initServiceInformerBase(
cache.NewListWatchFromClient(
kubeClient.CoreV1().RESTClient(), "services",
metav1.NamespaceAll, fields.Everything()))
}
func (cont *AciController) initServiceInformerBase(listWatch *cache.ListWatch) {
cont.serviceIndexer, cont.serviceInformer = cache.NewIndexerInformer(
listWatch, &v1.Service{}, 0,
cache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
cont.serviceAdded(obj)
},
UpdateFunc: func(old interface{}, new interface{}) {
cont.serviceUpdated(old, new)
},
DeleteFunc: func(obj interface{}) {
cont.serviceDeleted(obj)
},
},
cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc},
)
}
func serviceLogger(log *logrus.Logger, as *v1.Service) *logrus.Entry {
return log.WithFields(logrus.Fields{
"namespace": as.ObjectMeta.Namespace,
"name": as.ObjectMeta.Name,
"type": as.Spec.Type,
})
}
func (cont *AciController) queueIPNetPolUpdates(ips map[string]bool) {
for ipStr := range ips {
ip := net.ParseIP(ipStr)
if ip == nil {
continue
}
entries, err := cont.netPolSubnetIndex.ContainingNetworks(ip)
if err != nil {
cont.log.Error("Corrupted network policy IP index, err: ", err)
return
}
for _, entry := range entries {
for npkey := range entry.(*ipIndexEntry).keys {
cont.queueNetPolUpdateByKey(npkey)
}
}
}
}
func (cont *AciController) queuePortNetPolUpdates(ports map[string]targetPort) {
for portkey := range ports {
entry, _ := cont.targetPortIndex[portkey]
if entry == nil {
continue
}
for npkey := range entry.networkPolicyKeys {
cont.queueNetPolUpdateByKey(npkey)
}
}
}
func (cont *AciController) queueNetPolForEpAddrs(addrs []v1.EndpointAddress) {
for _, addr := range addrs {
if addr.TargetRef == nil || addr.TargetRef.Kind != "Pod" ||
addr.TargetRef.Namespace == "" || addr.TargetRef.Name == "" {
continue
}
podkey := addr.TargetRef.Namespace + "/" + addr.TargetRef.Name
npkeys := cont.netPolEgressPods.GetObjForPod(podkey)
ps := make(map[string]bool)
for _, npkey := range npkeys {
cont.queueNetPolUpdateByKey(npkey)
ps[npkey] = true
}
// Process if the any matching namedport wildcard policy is present
// ignore np already processed policies
cont.queueMatchingNamedNp(ps, podkey)
}
}
func (cont *AciController) queueMatchingNamedNp(served map[string]bool, podkey string) {
cont.indexMutex.Lock()
for npkey := range cont.nmPortNp {
if _, ok := served[npkey]; !ok {
if cont.checkPodNmpMatchesNp(npkey, podkey) {
cont.queueNetPolUpdateByKey(npkey)
}
}
}
cont.indexMutex.Unlock()
}
func (cont *AciController) queueEndpointsNetPolUpdates(endpoints *v1.Endpoints) {
for _, subset := range endpoints.Subsets {
cont.queueNetPolForEpAddrs(subset.Addresses)
cont.queueNetPolForEpAddrs(subset.NotReadyAddresses)
}
}
func (cont *AciController) returnServiceIps(ips []net.IP) {
for _, ip := range ips {
if ip.To4() != nil {
cont.serviceIps.DeallocateIp(ip)
} else if ip.To16() != nil {
cont.serviceIps.DeallocateIp(ip)
}
}
}
func returnIps(pool *netIps, ips []net.IP) {
for _, ip := range ips {
if ip.To4() != nil {
pool.V4.AddIp(ip)
} else if ip.To16() != nil {
pool.V6.AddIp(ip)
}
}
}
func (cont *AciController) staticMonPolName() string {
return cont.aciNameForKey("monPol", cont.env.ServiceBd())
}
func (cont *AciController) staticMonPolDn() string {
if cont.config.AciServiceMonitorInterval > 0 {
return fmt.Sprintf("uni/tn-%s/ipslaMonitoringPol-%s",
cont.config.AciVrfTenant, cont.staticMonPolName())
}
return ""
}
func (cont *AciController) staticServiceObjs() apicapi.ApicSlice {
var serviceObjs apicapi.ApicSlice
// Service bridge domain
bdName := cont.aciNameForKey("bd", cont.env.ServiceBd())
bd := apicapi.NewFvBD(cont.config.AciVrfTenant, bdName)
bd.SetAttr("arpFlood", "yes")
bd.SetAttr("ipLearning", "no")
bd.SetAttr("unkMacUcastAct", "flood")
bdToOut := apicapi.NewRsBdToOut(bd.GetDn(), cont.config.AciL3Out)
bd.AddChild(bdToOut)
bdToVrf := apicapi.NewRsCtx(bd.GetDn(), cont.config.AciVrf)
bd.AddChild(bdToVrf)
bdn := bd.GetDn()
for _, cidr := range cont.config.NodeServiceSubnets {
sn := apicapi.NewFvSubnet(bdn, cidr)
bd.AddChild(sn)
}
serviceObjs = append(serviceObjs, bd)
// Service IP SLA monitoring policy
if cont.config.AciServiceMonitorInterval > 0 {
monPol := apicapi.NewFvIPSLAMonitoringPol(cont.config.AciVrfTenant,
cont.staticMonPolName())
monPol.SetAttr("slaFrequency",
strconv.Itoa(cont.config.AciServiceMonitorInterval))
serviceObjs = append(serviceObjs, monPol)
}
return serviceObjs
}
func (cont *AciController) initStaticServiceObjs() {
cont.apicConn.WriteApicObjects(cont.config.AciPrefix+"_service_static",
cont.staticServiceObjs())
}
func (cont *AciController) updateServicesForNode(nodename string) {
cont.serviceEndPoints.UpdateServicesForNode(nodename)
}
// must have index lock
func (cont *AciController) getActiveFabricPathDn(node string) string {
var fabricPathDn string
sz := len(cont.nodeOpflexDevice[node])
for i := range cont.nodeOpflexDevice[node] {
device := cont.nodeOpflexDevice[node][sz-1-i]
if device.GetAttrStr("state") == "connected" {
fabricPathDn = device.GetAttrStr("fabricPathDn")
break
}
}
return fabricPathDn
}
func deleteDevicesFromList(delDevices apicapi.ApicSlice, devices apicapi.ApicSlice) apicapi.ApicSlice {
var newDevices apicapi.ApicSlice
for delDev := range delDevices {
for _, device := range devices {
if !reflect.DeepEqual(delDev, device) {
newDevices = append(newDevices, device)
}
}
}
return newDevices
}
func (cont *AciController) deleteOldOpflexDevices() {
var nodeUpdates []string
cont.indexMutex.Lock()
for node, devices := range cont.nodeOpflexDevice {
var delDevices apicapi.ApicSlice
fabricPathDn := cont.getActiveFabricPathDn(node)
if fabricPathDn != "" {
for _, device := range devices {
if device.GetAttrStr("delete") == "true" && device.GetAttrStr("fabricPathDn") != fabricPathDn {
deleteTimeStr := device.GetAttrStr("deleteTime")
deleteTime, err := time.Parse(time.RFC3339, deleteTimeStr)
if err != nil {
cont.log.Error("Failed to parse opflex device delete time: ", err)
continue
}
now := time.Now()
diff := now.Sub(deleteTime)
if diff.Seconds() >= cont.config.OpflexDeviceDeleteTimeout {
delDevices = append(delDevices, device)
}
}
}
if len(delDevices) > 0 {
newDevices := deleteDevicesFromList(delDevices, devices)
cont.nodeOpflexDevice[node] = newDevices
if len(newDevices) == 0 {
delete(cont.nodeOpflexDevice, node)
}
nodeUpdates = append(nodeUpdates, node)
}
}
}
cont.indexMutex.Unlock()
if len(nodeUpdates) > 0 {
cont.postOpflexDeviceDelete(nodeUpdates)
}
}
// must have index lock
func (cont *AciController) setDeleteFlagForOldDevices(node, fabricPathDn string) {
for _, device := range cont.nodeOpflexDevice[node] {
if device.GetAttrStr("fabricPathDn") != fabricPathDn {
t := time.Now()
device.SetAttr("delete", "true")
device.SetAttr("deleteTime", t.Format(time.RFC3339))
}
}
}
// must have index lock
func (cont *AciController) fabricPathForNode(name string) (string, bool) {
sz := len(cont.nodeOpflexDevice[name])
for i := range cont.nodeOpflexDevice[name] {
device := cont.nodeOpflexDevice[name][sz-1-i]
deviceState := device.GetAttrStr("state")
if deviceState == "connected" {
if deviceState != device.GetAttrStr("prevState") {
cont.fabricPathLogger(device.GetAttrStr("hostName"), device).Info("Processing fabric path for node ",
"when connected device state is found")
device.SetAttr("prevState", deviceState)
}
fabricPathDn := device.GetAttrStr("fabricPathDn")
cont.setDeleteFlagForOldDevices(name, fabricPathDn)
return fabricPathDn, true
} else {
device.SetAttr("prevState", deviceState)
}
}
if sz > 0 {
// When the opflex-device for a node changes, for example during a live migration,
// we end up with both the old and the new device objects till the old object
// ages out on APIC. The new object is at end of the devices list (see opflexDeviceChanged),
// so we return the fabricPathDn of the last opflex-device.
cont.fabricPathLogger(cont.nodeOpflexDevice[name][sz-1].GetAttrStr("hostName"),
cont.nodeOpflexDevice[name][sz-1]).Info("Processing fabricPathDn for node")
return cont.nodeOpflexDevice[name][sz-1].GetAttrStr("fabricPathDn"), true
}
return "", false
}
// must have index lock
func (cont *AciController) deviceMacForNode(name string) (string, bool) {
sz := len(cont.nodeOpflexDevice[name])
if sz > 0 {
// When the opflex-device for a node changes, for example when the
// node is recreated, we end up with both the old and the new
// device objects till the old object ages out on APIC. The
// new object is at end of the devices list (see
// opflexDeviceChanged), so we return the MAC address of the
// last opflex-device.
return cont.nodeOpflexDevice[name][sz-1].GetAttrStr("mac"), true
}
return "", false
}
func apicRedirectDst(rpDn string, ip string, mac string,
descr string, healthGroupDn string, enablePbrTracking bool) apicapi.ApicObject {
dst := apicapi.NewVnsRedirectDest(rpDn, ip, mac).SetAttr("descr", descr)
if healthGroupDn != "" && enablePbrTracking {
dst.AddChild(apicapi.NewVnsRsRedirectHealthGroup(dst.GetDn(),
healthGroupDn))
}
return dst
}
func (cont *AciController) apicRedirectPol(name string, tenantName string, nodes []string,
nodeMap map[string]*metadata.ServiceEndpoint,
monPolDn string, enablePbrTracking bool) (apicapi.ApicObject, string) {
rp := apicapi.NewVnsSvcRedirectPol(tenantName, name)
rp.SetAttr("thresholdDownAction", "deny")
rpDn := rp.GetDn()
for _, node := range nodes {
cont.indexMutex.Lock()
serviceEp, ok := nodeMap[node]
if !ok {
continue
}
if serviceEp.Ipv4 != nil {
rp.AddChild(apicRedirectDst(rpDn, serviceEp.Ipv4.String(),
serviceEp.Mac, node, serviceEp.HealthGroupDn, enablePbrTracking))
}
if serviceEp.Ipv6 != nil {
rp.AddChild(apicRedirectDst(rpDn, serviceEp.Ipv6.String(),
serviceEp.Mac, node, serviceEp.HealthGroupDn, enablePbrTracking))
}
cont.indexMutex.Unlock()
}
if monPolDn != "" && enablePbrTracking {
rp.AddChild(apicapi.NewVnsRsIPSLAMonitoringPol(rpDn, monPolDn))
}
return rp, rpDn
}
func apicExtNetCreate(enDn string, ingress string, ipv4 bool,
cidr bool, sharedSec bool) apicapi.ApicObject {
if !cidr {
if ipv4 {
ingress = ingress + "/32"
} else {
ingress = ingress + "/128"
}
}
subnet := apicapi.NewL3extSubnet(enDn, ingress)
if sharedSec {
subnet.SetAttr("scope", "import-security,shared-security")
}
return subnet
}
func apicExtNet(name string, tenantName string, l3Out string,
ingresses []string, sharedSecurity bool, snat bool) apicapi.ApicObject {
en := apicapi.NewL3extInstP(tenantName, l3Out, name)
enDn := en.GetDn()
if snat {
en.AddChild(apicapi.NewFvRsCons(enDn, name))
} else {
en.AddChild(apicapi.NewFvRsProv(enDn, name))
}
for _, ingress := range ingresses {
ip, _, _ := net.ParseCIDR(ingress)
// If ingress is a subnet
if ip != nil {
if ip != nil && ip.To4() != nil {
subnet := apicExtNetCreate(enDn, ingress, true, true, sharedSecurity)
en.AddChild(subnet)
} else if ip != nil && ip.To16() != nil {
subnet := apicExtNetCreate(enDn, ingress, false, true, sharedSecurity)
en.AddChild(subnet)
}
} else {
// If ingress is an IP address
ip := net.ParseIP(ingress)
if ip != nil && ip.To4() != nil {
subnet := apicExtNetCreate(enDn, ingress, true, false, sharedSecurity)
en.AddChild(subnet)
} else if ip != nil && ip.To16() != nil {
subnet := apicExtNetCreate(enDn, ingress, false, false, sharedSecurity)
en.AddChild(subnet)
}
}
}
return en
}
func apicExtNetCons(conName string, tenantName string,
l3Out string, net string) apicapi.ApicObject {
enDn := fmt.Sprintf("uni/tn-%s/out-%s/instP-%s", tenantName, l3Out, net)
return apicapi.NewFvRsCons(enDn, conName)
}
func apicExtNetProv(conName string, tenantName string,
l3Out string, net string) apicapi.ApicObject {
enDn := fmt.Sprintf("uni/tn-%s/out-%s/instP-%s", tenantName, l3Out, net)
return apicapi.NewFvRsProv(enDn, conName)
}
// Helper function to check if a string item exists in a slice
func stringInSlice(str string, list []string) bool {
for _, v := range list {
if v == str {
return true
}
}
return false
}
func validScope(scope string) bool {
validValues := []string{"", "context", "tenant", "global"}
return stringInSlice(scope, validValues)
}
func apicContract(conName string, tenantName string,
graphName string, scopeName string, isSnatPbrFltrChain bool) apicapi.ApicObject {
con := apicapi.NewVzBrCP(tenantName, conName)
if scopeName != "" && scopeName != "context" {
con.SetAttr("scope", scopeName)
}
cs := apicapi.NewVzSubj(con.GetDn(), "loadbalancedservice")
csDn := cs.GetDn()
if isSnatPbrFltrChain {
cs.SetAttr("revFltPorts", "no")
inTerm := apicapi.NewVzInTerm(csDn)
outTerm := apicapi.NewVzOutTerm(csDn)
inTerm.AddChild(apicapi.NewVzRsInTermGraphAtt(inTerm.GetDn(), graphName))
inTerm.AddChild(apicapi.NewVzRsFiltAtt(inTerm.GetDn(), conName+"_fromCons-toProv"))
outTerm.AddChild(apicapi.NewVzRsOutTermGraphAtt(outTerm.GetDn(), graphName))
outTerm.AddChild(apicapi.NewVzRsFiltAtt(outTerm.GetDn(), conName+"_fromProv-toCons"))
cs.AddChild(inTerm)
cs.AddChild(outTerm)
} else {
cs.AddChild(apicapi.NewVzRsSubjGraphAtt(csDn, graphName))
cs.AddChild(apicapi.NewVzRsSubjFiltAtt(csDn, conName))
}
con.AddChild(cs)
return con
}
func apicDevCtx(name string, tenantName string,
graphName string, bdName string, rpDn string, isSnatPbrFltrChain bool) apicapi.ApicObject {
cc := apicapi.NewVnsLDevCtx(tenantName, name, graphName, "loadbalancer")
ccDn := cc.GetDn()
graphDn := fmt.Sprintf("uni/tn-%s/lDevVip-%s", tenantName, graphName)
lifDn := fmt.Sprintf("%s/lIf-%s", graphDn, "interface")
bdDn := fmt.Sprintf("uni/tn-%s/BD-%s", tenantName, bdName)
cc.AddChild(apicapi.NewVnsRsLDevCtxToLDev(ccDn, graphDn))
rpDnBase := rpDn
for _, ctxConn := range []string{"consumer", "provider"} {
lifCtx := apicapi.NewVnsLIfCtx(ccDn, ctxConn)
if isSnatPbrFltrChain {
if ctxConn == "consumer" {
rpDn = rpDnBase + "_Cons"
} else {
rpDn = rpDnBase + "_Prov"
}
}
lifCtxDn := lifCtx.GetDn()
lifCtx.AddChild(apicapi.NewVnsRsLIfCtxToSvcRedirectPol(lifCtxDn, rpDn))
lifCtx.AddChild(apicapi.NewVnsRsLIfCtxToBD(lifCtxDn, bdDn))
lifCtx.AddChild(apicapi.NewVnsRsLIfCtxToLIf(lifCtxDn, lifDn))
cc.AddChild(lifCtx)
}
return cc
}
func apicFilterEntry(filterDn string, count string, p_start string,
p_end string, protocol string, stateful string, snat bool, outTerm bool) apicapi.ApicObject {
fe := apicapi.NewVzEntry(filterDn, count)
fe.SetAttr("etherT", "ip")
fe.SetAttr("prot", protocol)
if snat {
if outTerm {
if protocol == "tcp" {
fe.SetAttr("tcpRules", "est")
}
// Reverse the ports for outTerm
fe.SetAttr("dFromPort", p_start)
fe.SetAttr("dToPort", p_end)
} else {
fe.SetAttr("sFromPort", p_start)
fe.SetAttr("sToPort", p_end)
}
} else {
fe.SetAttr("dFromPort", p_start)
fe.SetAttr("dToPort", p_end)
}
fe.SetAttr("stateful", stateful)
return fe
}
func apicFilter(name string, tenantName string,
portSpec []v1.ServicePort, snat bool, snatRange portRangeSnat) apicapi.ApicObject {
filter := apicapi.NewVzFilter(tenantName, name)
filterDn := filter.GetDn()
var i int
var port v1.ServicePort
for i, port = range portSpec {
pstr := strconv.Itoa(int(port.Port))
proto := getProtocolStr(port.Protocol)
fe := apicFilterEntry(filterDn, strconv.Itoa(i), pstr,
pstr, proto, "no", false, false)
filter.AddChild(fe)
}
if snat {
portSpec := []portRangeSnat{snatRange}
p_start := strconv.Itoa(int(portSpec[0].start))
p_end := strconv.Itoa(int(portSpec[0].end))
fe1 := apicFilterEntry(filterDn, strconv.Itoa(i+1), p_start,
p_end, "tcp", "no", false, false)
filter.AddChild(fe1)
fe2 := apicFilterEntry(filterDn, strconv.Itoa(i+2), p_start,
p_end, "udp", "no", false, false)
filter.AddChild(fe2)
}
return filter
}
func apicFilterSnat(name string, tenantName string,
portSpec []portRangeSnat, outTerm bool) apicapi.ApicObject {
filter := apicapi.NewVzFilter(tenantName, name)
filterDn := filter.GetDn()
p_start := strconv.Itoa(int(portSpec[0].start))
p_end := strconv.Itoa(int(portSpec[0].end))
fe := apicFilterEntry(filterDn, "0", p_start,
p_end, "tcp", "no", true, outTerm)
filter.AddChild(fe)
fe1 := apicFilterEntry(filterDn, "1", p_start,
p_end, "udp", "no", true, outTerm)
filter.AddChild(fe1)
return filter
}
func (cont *AciController) updateServiceDeviceInstance(key string,
service *v1.Service) error {
cont.indexMutex.Lock()
nodeMap := make(map[string]*metadata.ServiceEndpoint)
cont.serviceEndPoints.GetnodesMetadata(key, service, nodeMap)
cont.indexMutex.Unlock()
var nodes []string
for node := range nodeMap {
nodes = append(nodes, node)
}
sort.Strings(nodes)
name := cont.aciNameForKey("svc", key)
var conScope string
scopeVal, ok := service.ObjectMeta.Annotations[metadata.ServiceContractScopeAnnotation]
if ok {
normScopeVal := strings.ToLower(scopeVal)
if !validScope(normScopeVal) {
errString := "Invalid service contract scope value provided " + scopeVal
err := errors.New(errString)
serviceLogger(cont.log, service).Error("Could not create contract: ", err)
return err
} else {
conScope = normScopeVal
}
} else {
conScope = DefaultServiceContractScope
}
var sharedSecurity bool
if conScope == "global" {
sharedSecurity = true
} else {
sharedSecurity = DefaultServiceExtSubNetShared
}
graphName := cont.aciNameForKey("svc", "global")
var serviceObjs apicapi.ApicSlice
if len(nodes) > 0 {
// 1. Service redirect policy
// The service redirect policy contains the MAC address
// and IP address of each of the service endpoints for
// each node that hosts a pod for this service. The
// example below shows the case of two nodes.
rp, rpDn :=
cont.apicRedirectPol(name, cont.config.AciVrfTenant, nodes,
nodeMap, cont.staticMonPolDn(), cont.config.AciPbrTrackingNonSnat)
serviceObjs = append(serviceObjs, rp)
// 2. Service graph contract and external network
// The service graph contract must be bound to the service
// graph. This contract must be consumed by the default
// layer 3 network and provided by the service layer 3
// network.
{
var ingresses []string
for _, ingress := range service.Status.LoadBalancer.Ingress {
ingresses = append(ingresses, ingress.IP)
}
serviceObjs = append(serviceObjs,
apicExtNet(name, cont.config.AciVrfTenant,
cont.config.AciL3Out, ingresses, sharedSecurity, false))
}
contract := apicContract(name, cont.config.AciVrfTenant, graphName, conScope, false)
serviceObjs = append(serviceObjs, contract)
for _, net := range cont.config.AciExtNetworks {
serviceObjs = append(serviceObjs,
apicExtNetCons(name, cont.config.AciVrfTenant,
cont.config.AciL3Out, net))
}
defaultPortRange := portRangeSnat{start: cont.config.SnatDefaultPortRangeStart,
end: cont.config.SnatDefaultPortRangeEnd}
_, snat := cont.snatServices[key]
filter := apicFilter(name, cont.config.AciVrfTenant,
service.Spec.Ports, snat, defaultPortRange)
serviceObjs = append(serviceObjs, filter)
// 3. Device cluster context
// The logical device context binds the service contract
// to the redirect policy and the device cluster and
// bridge domain for the device cluster.
serviceObjs = append(serviceObjs,
apicDevCtx(name, cont.config.AciVrfTenant, graphName,
cont.aciNameForKey("bd", cont.env.ServiceBd()), rpDn, false))
}
cont.apicConn.WriteApicObjects(name, serviceObjs)
return nil
}
func (cont *AciController) updateServiceDeviceInstanceSnat(key string) error {
nodeList := cont.nodeIndexer.List()
cont.indexMutex.Lock()
if len(cont.nodeServiceMetaCache) == 0 {
cont.indexMutex.Unlock()
return nil
}
nodeMap := make(map[string]*metadata.ServiceEndpoint)
for itr, nodeItem := range nodeList {
if itr == cont.config.MaxSvcGraphNodes {
break
}
node := nodeItem.(*v1.Node)
nodeName := node.ObjectMeta.Name
nodeMeta, ok := cont.nodeServiceMetaCache[nodeName]
if !ok {
continue
}
_, ok = cont.fabricPathForNode(nodeName)
if !ok {
continue
}
nodeMap[nodeName] = &nodeMeta.serviceEp
}
cont.indexMutex.Unlock()
var nodes []string
for node := range nodeMap {
nodes = append(nodes, node)
}
sort.Strings(nodes)
name := cont.aciNameForKey("snat", key)
var conScope = cont.config.SnatSvcContractScope
sharedSecurity := true
graphName := cont.aciNameForKey("svc", "global")
var serviceObjs apicapi.ApicSlice
if len(nodes) > 0 {
// 1. Service redirect policy
// The service redirect policy contains the MAC address
// and IP address of each of the service endpoints for
// each node that hosts a pod for this service.
// For SNAT with the introduction of filter-chain usage, to work-around
// an APIC limitation, creating two PBR policies with same nodes.
var rpDn string
var rp apicapi.ApicObject
if cont.apicConn.SnatPbrFltrChain {
rpCons, rpDnCons :=
cont.apicRedirectPol(name+"_Cons", cont.config.AciVrfTenant, nodes,
nodeMap, cont.staticMonPolDn(), true)
serviceObjs = append(serviceObjs, rpCons)
rpProv, _ :=
cont.apicRedirectPol(name+"_Prov", cont.config.AciVrfTenant, nodes,
nodeMap, cont.staticMonPolDn(), true)
serviceObjs = append(serviceObjs, rpProv)
rpDn = strings.TrimSuffix(rpDnCons, "_Cons")
} else {
rp, rpDn =
cont.apicRedirectPol(name, cont.config.AciVrfTenant, nodes,
nodeMap, cont.staticMonPolDn(), true)
serviceObjs = append(serviceObjs, rp)
}
// 2. Service graph contract and external network
// The service graph contract must be bound to the
// service
// graph. This contract must be consumed by the default
// layer 3 network and provided by the service layer 3
// network.
{
var ingresses []string
for _, policy := range cont.snatPolicyCache {
ingresses = append(ingresses, policy.SnatIp...)
}
serviceObjs = append(serviceObjs,
apicExtNet(name, cont.config.AciVrfTenant,
cont.config.AciL3Out, ingresses, sharedSecurity, true))
}
contract := apicContract(name, cont.config.AciVrfTenant, graphName, conScope, cont.apicConn.SnatPbrFltrChain)
serviceObjs = append(serviceObjs, contract)
for _, net := range cont.config.AciExtNetworks {
serviceObjs = append(serviceObjs,
apicExtNetProv(name, cont.config.AciVrfTenant,
cont.config.AciL3Out, net))
}
defaultPortRange := portRangeSnat{start: cont.config.SnatDefaultPortRangeStart,
end: cont.config.SnatDefaultPortRangeEnd}
portSpec := []portRangeSnat{defaultPortRange}
if cont.apicConn.SnatPbrFltrChain {
filterIn := apicFilterSnat(name+"_fromCons-toProv", cont.config.AciVrfTenant, portSpec, false)
serviceObjs = append(serviceObjs, filterIn)
filterOut := apicFilterSnat(name+"_fromProv-toCons", cont.config.AciVrfTenant, portSpec, true)
serviceObjs = append(serviceObjs, filterOut)
} else {
filter := apicFilterSnat(name, cont.config.AciVrfTenant, portSpec, false)
serviceObjs = append(serviceObjs, filter)
}
// 3. Device cluster context
// The logical device context binds the service contract
// to the redirect policy and the device cluster and
// bridge domain for the device cluster.
serviceObjs = append(serviceObjs,
apicDevCtx(name, cont.config.AciVrfTenant, graphName,
cont.aciNameForKey("bd", cont.env.ServiceBd()), rpDn, cont.apicConn.SnatPbrFltrChain))
}
cont.apicConn.WriteApicObjects(name, serviceObjs)
return nil
}
func (cont *AciController) queueServiceUpdateByKey(key string) {
cont.serviceQueue.Add(key)
}
func (cont *AciController) queueServiceUpdate(service *v1.Service) {
key, err := cache.MetaNamespaceKeyFunc(service)
if err != nil {
serviceLogger(cont.log, service).
Error("Could not create service key: ", err)
return
}
cont.serviceQueue.Add(key)
}
func apicDeviceCluster(name string, vrfTenant string,
physDom string, encap string,
nodes []string, nodeMap map[string]string) (apicapi.ApicObject, string) {
dc := apicapi.NewVnsLDevVip(vrfTenant, name)
dc.SetAttr("managed", "no")
dcDn := dc.GetDn()
dc.AddChild(apicapi.NewVnsRsALDevToPhysDomP(dcDn,
fmt.Sprintf("uni/phys-%s", physDom)))
lif := apicapi.NewVnsLIf(dcDn, "interface")
lif.SetAttr("encap", encap)
lifDn := lif.GetDn()
for _, node := range nodes {
path, ok := nodeMap[node]
if !ok {
continue
}
cdev := apicapi.NewVnsCDev(dcDn, node)
cif := apicapi.NewVnsCif(cdev.GetDn(), "interface")
cif.AddChild(apicapi.NewVnsRsCIfPathAtt(cif.GetDn(), path))
cdev.AddChild(cif)
lif.AddChild(apicapi.NewVnsRsCIfAttN(lifDn, cif.GetDn()))
dc.AddChild(cdev)
}
dc.AddChild(lif)
return dc, dcDn
}
func apicServiceGraph(name string, tenantName string,
dcDn string) apicapi.ApicObject {
sg := apicapi.NewVnsAbsGraph(tenantName, name)
sgDn := sg.GetDn()
var provDn string
var consDn string
var cTermDn string
var pTermDn string
{
an := apicapi.NewVnsAbsNode(sgDn, "loadbalancer")
an.SetAttr("managed", "no")
an.SetAttr("routingMode", "Redirect")
anDn := an.GetDn()
cons := apicapi.NewVnsAbsFuncConn(anDn, "consumer")
consDn = cons.GetDn()
an.AddChild(cons)
prov := apicapi.NewVnsAbsFuncConn(anDn, "provider")
provDn = prov.GetDn()
an.AddChild(prov)
an.AddChild(apicapi.NewVnsRsNodeToLDev(anDn, dcDn))
sg.AddChild(an)
}
{
tnc := apicapi.NewVnsAbsTermNodeCon(sgDn, "T1")
tncDn := tnc.GetDn()
cTerm := apicapi.NewVnsAbsTermConn(tncDn)
cTermDn = cTerm.GetDn()
tnc.AddChild(cTerm)
tnc.AddChild(apicapi.NewVnsInTerm(tncDn))
tnc.AddChild(apicapi.NewVnsOutTerm(tncDn))
sg.AddChild(tnc)
}
{
tnp := apicapi.NewVnsAbsTermNodeProv(sgDn, "T2")
tnpDn := tnp.GetDn()
pTerm := apicapi.NewVnsAbsTermConn(tnpDn)
pTermDn = pTerm.GetDn()
tnp.AddChild(pTerm)
tnp.AddChild(apicapi.NewVnsInTerm(tnpDn))
tnp.AddChild(apicapi.NewVnsOutTerm(tnpDn))
sg.AddChild(tnp)
}
{
acc := apicapi.NewVnsAbsConnection(sgDn, "C1")
acc.SetAttr("connDir", "provider")
accDn := acc.GetDn()
acc.AddChild(apicapi.NewVnsRsAbsConnectionConns(accDn, consDn))
acc.AddChild(apicapi.NewVnsRsAbsConnectionConns(accDn, cTermDn))
sg.AddChild(acc)
}
{
acp := apicapi.NewVnsAbsConnection(sgDn, "C2")
acp.SetAttr("connDir", "provider")
acpDn := acp.GetDn()
acp.AddChild(apicapi.NewVnsRsAbsConnectionConns(acpDn, provDn))
acp.AddChild(apicapi.NewVnsRsAbsConnectionConns(acpDn, pTermDn))
sg.AddChild(acp)
}
return sg
}
func (cont *AciController) updateDeviceCluster() {
nodeMap := make(map[string]string)
cont.indexMutex.Lock()
for node := range cont.nodeOpflexDevice {
cont.log.Debug("Processing node in nodeOpflexDevice cache : ", node)
fabricPath, ok := cont.fabricPathForNode(node)
if !ok {
continue
}
nodeMap[node] = fabricPath
}
cont.indexMutex.Unlock()
var nodes []string
for node := range nodeMap {
nodes = append(nodes, node)
}
sort.Strings(nodes)
name := cont.aciNameForKey("svc", "global")
var serviceObjs apicapi.ApicSlice
// 1. Device cluster:
// The device cluster is a set of physical paths that need to be
// created for each node in the cluster, that correspond to the
// service interface for each node.
dc, dcDn := apicDeviceCluster(name, cont.config.AciVrfTenant,
cont.config.AciServicePhysDom, cont.config.AciServiceEncap,
nodes, nodeMap)
serviceObjs = append(serviceObjs, dc)
// 2. Service graph template
// The service graph controls how the traffic will be redirected.
// A service graph must be created for each device cluster.
serviceObjs = append(serviceObjs,
apicServiceGraph(name, cont.config.AciVrfTenant, dcDn))