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ovn_ic.go
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ovn_ic.go
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package controller
import (
"context"
"encoding/json"
"fmt"
"os"
"os/exec"
"reflect"
"strings"
"time"
"github.com/scylladb/go-set/strset"
k8serrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/types"
"k8s.io/klog/v2"
kubeovnv1 "github.com/kubeovn/kube-ovn/pkg/apis/kubeovn/v1"
"github.com/kubeovn/kube-ovn/pkg/ovs"
"github.com/kubeovn/kube-ovn/pkg/ovsdb/ovnnb"
"github.com/kubeovn/kube-ovn/pkg/util"
)
var (
icEnabled = "unknown"
lastIcCm map[string]string
)
func (c *Controller) resyncInterConnection() {
cm, err := c.configMapsLister.ConfigMaps(c.config.PodNamespace).Get(util.InterconnectionConfig)
if err != nil && !k8serrors.IsNotFound(err) {
klog.Errorf("failed to get ovn-ic-config, %v", err)
return
}
if k8serrors.IsNotFound(err) || cm.Data["enable-ic"] == "false" {
if icEnabled == "false" {
return
}
klog.Info("start to remove ovn-ic")
azName := ""
if cm != nil {
azName = cm.Data["az-name"]
} else if lastIcCm != nil {
azName = lastIcCm["az-name"]
}
if err := c.removeInterConnection(azName); err != nil {
klog.Errorf("failed to remove ovn-ic, %v", err)
return
}
if err := c.delLearnedRoute(); err != nil {
klog.Errorf("failed to remove learned static routes, %v", err)
return
}
icEnabled = "false"
lastIcCm = nil
klog.Info("finish removing ovn-ic")
return
}
blackList := []string{}
autoRoute := false
if cm.Data["auto-route"] == "true" {
autoRoute = true
}
subnets, err := c.subnetsLister.List(labels.Everything())
if err != nil {
klog.Errorf("failed to list subnets, %v", err)
return
}
for _, subnet := range subnets {
if subnet.Spec.DisableInterConnection || subnet.Name == c.config.NodeSwitch {
blackList = append(blackList, subnet.Spec.CIDRBlock)
}
}
nodes, err := c.nodesLister.List(labels.Everything())
if err != nil {
klog.Errorf("failed to list node, %v", err)
return
}
for _, node := range nodes {
ipv4, ipv6 := util.GetNodeInternalIP(*node)
if ipv4 != "" {
blackList = append(blackList, ipv4)
}
if ipv6 != "" {
blackList = append(blackList, ipv6)
}
}
if err := c.OVNNbClient.SetICAutoRoute(autoRoute, blackList); err != nil {
klog.Errorf("failed to config auto route, %v", err)
return
}
isCMEqual := reflect.DeepEqual(cm.Data, lastIcCm)
if icEnabled == "true" && lastIcCm != nil && isCMEqual {
return
}
if icEnabled == "true" && lastIcCm != nil && !isCMEqual {
if err := c.removeInterConnection(lastIcCm["az-name"]); err != nil {
klog.Errorf("failed to remove ovn-ic, %v", err)
return
}
if err := c.delLearnedRoute(); err != nil {
klog.Errorf("failed to remove learned static routes, %v", err)
return
}
c.ovnLegacyClient.OvnICSbAddress = genHostAddress(cm.Data["ic-db-host"], cm.Data["ic-sb-port"])
c.ovnLegacyClient.OvnICNbAddress = genHostAddress(cm.Data["ic-db-host"], cm.Data["ic-nb-port"])
klog.Info("start to reestablish ovn-ic")
if err := c.establishInterConnection(cm.Data); err != nil {
klog.Errorf("failed to reestablish ovn-ic, %v", err)
return
}
if err := c.RemoveOldChassisInSbDB(lastIcCm["az-name"]); err != nil {
klog.Errorf("failed to remove remote chassis: %v", err)
}
icEnabled = "true"
lastIcCm = cm.Data
klog.Info("finish reestablishing ovn-ic")
return
}
c.ovnLegacyClient.OvnICNbAddress = genHostAddress(cm.Data["ic-db-host"], cm.Data["ic-nb-port"])
klog.Info("start to establish ovn-ic")
if err := c.establishInterConnection(cm.Data); err != nil {
klog.Errorf("failed to establish ovn-ic, %v", err)
return
}
icEnabled = "true"
lastIcCm = cm.Data
klog.Info("finish establishing ovn-ic")
}
func (c *Controller) removeInterConnection(azName string) error {
sel, _ := metav1.LabelSelectorAsSelector(&metav1.LabelSelector{MatchLabels: map[string]string{util.ICGatewayLabel: "true"}})
nodes, err := c.nodesLister.List(sel)
if err != nil {
klog.Errorf("failed to list nodes, %v", err)
return err
}
for _, cachedNode := range nodes {
no := cachedNode.DeepCopy()
patchPayloadTemplate := `[{
"op": "%s",
"path": "/metadata/labels",
"value": %s
}]`
op := "replace"
if len(no.Labels) == 0 {
op = "add"
}
no.Labels[util.ICGatewayLabel] = "false"
raw, _ := json.Marshal(no.Labels)
patchPayload := fmt.Sprintf(patchPayloadTemplate, op, raw)
_, err = c.config.KubeClient.CoreV1().Nodes().Patch(context.Background(), no.Name, types.JSONPatchType, []byte(patchPayload), metav1.PatchOptions{}, "")
if err != nil {
klog.Errorf("patch ic gw node %s failed %v", no.Name, err)
return err
}
}
if azName != "" {
if err := c.OVNNbClient.DeleteLogicalSwitchPorts(nil, func(lsp *ovnnb.LogicalSwitchPort) bool {
// add the code below because azName may have multi "-"
firstIndex := strings.Index(lsp.Name, "-")
if firstIndex != -1 {
firstPart := lsp.Name[:firstIndex]
secondPart := lsp.Name[firstIndex+1:]
return secondPart == azName && strings.HasPrefix(firstPart, util.InterconnectionSwitch)
}
return false
}); err != nil {
return err
}
if err := c.OVNNbClient.DeleteLogicalRouterPorts(nil, func(lrp *ovnnb.LogicalRouterPort) bool {
lastIndex := strings.LastIndex(lrp.Name, "-")
if lastIndex != -1 {
firstPart := lrp.Name[:lastIndex]
secondPart := lrp.Name[lastIndex+1:]
return firstPart == azName && strings.HasPrefix(secondPart, util.InterconnectionSwitch)
}
return false
}); err != nil {
return err
}
}
if err := c.stopOVNIC(); err != nil {
klog.Errorf("failed to stop ovn-ic, %v", err)
return err
}
return nil
}
func (c *Controller) establishInterConnection(config map[string]string) error {
if err := c.startOVNIC(config["ic-db-host"], config["ic-nb-port"], config["ic-sb-port"]); err != nil {
klog.Errorf("failed to start ovn-ic, %v", err)
return err
}
if err := c.OVNNbClient.SetAzName(config["az-name"]); err != nil {
klog.Errorf("failed to set az name. %v", err)
return err
}
groups := strings.Split(config["gw-nodes"], ";")
for i, group := range groups {
gwNodes := strings.Split(group, ",")
chassises := make([]string, len(gwNodes))
for j, gw := range gwNodes {
gw = strings.TrimSpace(gw)
chassis, err := c.OVNSbClient.GetChassisByHost(gw)
if err != nil {
klog.Errorf("failed to get gw %s chassis: %v", gw, err)
return err
}
if chassis.Name == "" {
return fmt.Errorf("no chassis for gw %s", gw)
}
chassises[j] = chassis.Name
cachedNode, err := c.nodesLister.Get(gw)
if err != nil {
klog.Errorf("failed to get gw node %s, %v", gw, err)
return err
}
node := cachedNode.DeepCopy()
patchPayloadTemplate := `[{
"op": "%s",
"path": "/metadata/labels",
"value": %s
}]`
op := "replace"
if len(node.Labels) == 0 {
op = "add"
}
node.Labels[util.ICGatewayLabel] = "true"
raw, _ := json.Marshal(node.Labels)
patchPayload := fmt.Sprintf(patchPayloadTemplate, op, raw)
_, err = c.config.KubeClient.CoreV1().Nodes().Patch(context.Background(), gw, types.JSONPatchType, []byte(patchPayload), metav1.PatchOptions{}, "")
if err != nil {
klog.Errorf("patch gw node %s failed %v", gw, err)
return err
}
}
tsName := c.getTSName(i)
cidr, err := c.getTSCidr(i)
if err != nil {
klog.Errorf("failed to get ts cidr index %d err: %v", i, err)
return err
}
if err := c.createTS(genHostAddress(config["ic-db-host"], config["ic-nb-port"]), tsName, cidr); err != nil {
klog.Errorf("failed to create ts %q: %v", tsName, err)
return err
}
tsPort := fmt.Sprintf("%s-%s", tsName, config["az-name"])
exist, err := c.OVNNbClient.LogicalSwitchPortExists(tsPort)
if err != nil {
klog.Errorf("failed to list logical switch ports, %v", err)
return err
}
if exist {
klog.Infof("ts port %s already exists", tsPort)
continue
}
lrpAddr, err := c.acquireLrpAddress(tsName)
if err != nil {
klog.Errorf("failed to acquire lrp address, %v", err)
return err
}
lrpName := fmt.Sprintf("%s-%s", config["az-name"], tsName)
if err := c.OVNNbClient.CreateLogicalPatchPort(tsName, c.config.ClusterRouter, tsPort, lrpName, lrpAddr, util.GenerateMac(), chassises...); err != nil {
klog.Errorf("failed to create ovn-ic lrp %q: %v", lrpName, err)
return err
}
}
return nil
}
func (c *Controller) acquireLrpAddress(ts string) (string, error) {
cidr, err := c.ovnLegacyClient.GetTsSubnet(ts)
if err != nil {
klog.Errorf("failed to get ts subnet %s: %v", ts, err)
return "", err
}
existAddress, err := c.listRemoteLogicalSwitchPortAddress()
if err != nil {
klog.Errorf("failed to list remote port address, %v", err)
return "", err
}
for {
var random string
var ips []string
v4Cidr, v6Cidr := util.SplitStringIP(cidr)
if v4Cidr != "" {
ips = append(ips, util.GenerateRandomV4IP(v4Cidr))
}
if v6Cidr != "" {
ips = append(ips, util.GenerateRandomV6IP(v6Cidr))
}
random = strings.Join(ips, ",")
// find a free address
if !existAddress.Has(random) {
return random, nil
}
klog.Infof("random ip %s already exists", random)
time.Sleep(1 * time.Second)
}
}
func (c *Controller) startOVNIC(icHost, icNbPort, icSbPort string) error {
cmd := exec.Command("/usr/share/ovn/scripts/ovn-ctl",
fmt.Sprintf("--ovn-ic-nb-db=%s", genHostAddress(icHost, icNbPort)),
fmt.Sprintf("--ovn-ic-sb-db=%s", genHostAddress(icHost, icSbPort)),
fmt.Sprintf("--ovn-northd-nb-db=%s", c.config.OvnNbAddr),
fmt.Sprintf("--ovn-northd-sb-db=%s", c.config.OvnSbAddr),
"start_ic")
if os.Getenv("ENABLE_SSL") == "true" {
cmd = exec.Command("/usr/share/ovn/scripts/ovn-ctl",
fmt.Sprintf("--ovn-ic-nb-db=%s", genHostAddress(icHost, icNbPort)),
fmt.Sprintf("--ovn-ic-sb-db=%s", genHostAddress(icHost, icSbPort)),
fmt.Sprintf("--ovn-northd-nb-db=%s", c.config.OvnNbAddr),
fmt.Sprintf("--ovn-northd-sb-db=%s", c.config.OvnSbAddr),
"--ovn-ic-ssl-key=/var/run/tls/key",
"--ovn-ic-ssl-cert=/var/run/tls/cert",
"--ovn-ic-ssl-ca-cert=/var/run/tls/cacert",
"start_ic")
}
output, err := cmd.CombinedOutput()
if err != nil {
return fmt.Errorf("output: %s, err: %v", output, err)
}
return nil
}
func (c *Controller) stopOVNIC() error {
cmd := exec.Command("/usr/share/ovn/scripts/ovn-ctl", "stop_ic")
output, err := cmd.CombinedOutput()
if err != nil {
return fmt.Errorf("output: %s, err: %v", output, err)
}
return nil
}
func (c *Controller) createTS(icNBAddr, tsName, subnet string) error {
cmd := exec.Command("ovn-ic-nbctl",
fmt.Sprintf("--db=%s", icNBAddr),
ovs.MayExist, "ts-add", tsName,
"--", "set", "Transit_Switch", tsName, fmt.Sprintf(`external_ids:subnet="%s"`, subnet))
if os.Getenv("ENABLE_SSL") == "true" {
cmd = exec.Command("ovn-ic-nbctl",
fmt.Sprintf("--db=%s", icNBAddr),
"--private-key=/var/run/tls/key",
"--certificate=/var/run/tls/cert",
"--ca-cert=/var/run/tls/cacert",
ovs.MayExist, "ts-add", tsName,
"--", "set", "Transit_Switch", tsName, fmt.Sprintf(`external_ids:subnet="%s"`, subnet))
}
output, err := cmd.CombinedOutput()
if err != nil {
return fmt.Errorf("output: %s, err: %v", output, err)
}
return nil
}
func (c *Controller) delLearnedRoute() error {
lrList, err := c.OVNNbClient.ListLogicalRouter(false, nil)
if err != nil {
klog.Errorf("failed to list logical routers: %v", err)
return err
}
for _, lr := range lrList {
routeList, err := c.OVNNbClient.ListLogicalRouterStaticRoutes(lr.Name, nil, nil, "", map[string]string{"ic-learned-route": ""})
if err != nil {
klog.Errorf("failed to list learned static routes on logical router %s: %v", lr.Name, err)
return err
}
for _, r := range routeList {
var policy ovnnb.LogicalRouterStaticRoutePolicy
if r.Policy != nil {
policy = *r.Policy
}
if err = c.deleteStaticRouteFromVpc(
lr.Name,
r.RouteTable,
r.IPPrefix,
r.Nexthop,
reversePolicy(policy),
); err != nil {
klog.Errorf("failed to delete learned static route %#v on logical router %s: %v", r, lr.Name, err)
return err
}
}
}
klog.V(5).Infof("finish removing learned routes")
return nil
}
func genHostAddress(host, port string) (hostAddress string) {
hostList := strings.Split(host, ",")
if len(hostList) == 1 {
hostAddress = fmt.Sprintf("tcp:[%s]:%s", hostList[0], port)
} else {
var builder strings.Builder
i := 0
for i < len(hostList)-1 {
builder.WriteString(fmt.Sprintf("tcp:[%s]:%s,", hostList[i], port))
i++
}
builder.WriteString(fmt.Sprintf("tcp:[%s]:%s", hostList[i], port))
hostAddress = builder.String()
}
return hostAddress
}
func (c *Controller) SynRouteToPolicy() {
c.syncOneRouteToPolicy(util.OvnICKey, util.OvnICConnected)
c.syncOneRouteToPolicy(util.OvnICKey, util.OvnICStatic)
// To support the version before kube-ovn v1.9, in which version the option tag is origin=""
c.syncOneRouteToPolicy(util.OvnICKey, util.OvnICNone)
}
func (c *Controller) RemoveOldChassisInSbDB(azName string) error {
azUUID, err := c.ovnLegacyClient.GetAzUUID(azName)
if err != nil {
klog.Errorf("failed to get UUID of AZ %s: %v", lastIcCm["az-name"], err)
return err
}
gateways, err := c.ovnLegacyClient.GetGatewayUUIDsInOneAZ(azUUID)
if err != nil {
klog.Errorf("failed to get gateway UUIDs in AZ %s: %v", azUUID, err)
return err
}
routes, err := c.ovnLegacyClient.GetRouteUUIDsInOneAZ(azUUID)
if err != nil {
klog.Errorf("failed to get route UUIDs in AZ %s: %v", azUUID, err)
return err
}
c.ovnLegacyClient.DestroyGateways(gateways)
c.ovnLegacyClient.DestroyRoutes(routes)
return c.ovnLegacyClient.DestroyChassis(azUUID)
}
func stripPrefix(policyMatch string) (string, error) {
matches := strings.Split(policyMatch, "==")
switch {
case strings.Trim(matches[0], " ") == util.MatchV4Dst:
return strings.Trim(matches[1], " "), nil
case strings.Trim(matches[0], " ") == util.MatchV6Dst:
return strings.Trim(matches[1], " "), nil
default:
return "", fmt.Errorf("policy %s is mismatched", policyMatch)
}
}
func (c *Controller) syncOneRouteToPolicy(key, value string) {
lr, err := c.OVNNbClient.GetLogicalRouter(c.config.ClusterRouter, false)
if err != nil {
klog.Errorf("logical router does not exist %v at %v", err, time.Now())
return
}
lrRouteList, err := c.OVNNbClient.ListLogicalRouterStaticRoutesByOption(lr.Name, util.MainRouteTable, key, value)
if err != nil {
klog.Errorf("failed to list lr ovn-ic route %v", err)
return
}
lrPolicyList, err := c.OVNNbClient.GetLogicalRouterPoliciesByExtID(lr.Name, key, value)
if err != nil {
klog.Errorf("failed to list ovn-ic lr policy: %v", err)
return
}
if len(lrRouteList) == 0 {
klog.V(5).Info("lr ovn-ic route does not exist")
err := c.OVNNbClient.DeleteLogicalRouterPolicies(lr.Name, util.OvnICPolicyPriority, map[string]string{key: value})
if err != nil {
klog.Errorf("failed to delete ovn-ic lr policy: %v", err)
return
}
return
}
policyMap := map[string]string{}
for _, lrPolicy := range lrPolicyList {
match, err := stripPrefix(lrPolicy.Match)
if err != nil {
klog.Errorf("policy match abnormal: %v", err)
continue
}
policyMap[match] = lrPolicy.UUID
}
networks := strset.NewWithSize(len(lrRouteList))
for _, lrRoute := range lrRouteList {
networks.Add(lrRoute.IPPrefix)
}
networks.Each(func(prefix string) bool {
if _, ok := policyMap[prefix]; ok {
delete(policyMap, prefix)
return true
}
match := util.MatchV4Dst + " == " + prefix
if util.CheckProtocol(prefix) == kubeovnv1.ProtocolIPv6 {
match = util.MatchV6Dst + " == " + prefix
}
if err = c.OVNNbClient.AddLogicalRouterPolicy(lr.Name, util.OvnICPolicyPriority, match, ovnnb.LogicalRouterPolicyActionAllow, nil, map[string]string{key: value, "vendor": util.CniTypeName}); err != nil {
klog.Errorf("failed to add router policy: %v", err)
}
return true
})
for _, uuid := range policyMap {
if err := c.OVNNbClient.DeleteLogicalRouterPolicyByUUID(lr.Name, uuid); err != nil {
klog.Errorf("deleting router policy failed %v", err)
}
}
}
func (c *Controller) listRemoteLogicalSwitchPortAddress() (*strset.Set, error) {
lsps, err := c.OVNNbClient.ListLogicalSwitchPorts(true, nil, func(lsp *ovnnb.LogicalSwitchPort) bool {
return lsp.Type == "remote"
})
if err != nil {
klog.Error(err)
return nil, fmt.Errorf("list remote logical switch ports: %v", err)
}
existAddress := strset.NewWithSize(len(lsps))
for _, lsp := range lsps {
if len(lsp.Addresses) == 0 {
continue
}
addresses := lsp.Addresses[0]
fields := strings.Fields(addresses)
if len(fields) != 2 {
continue
}
existAddress.Add(fields[1])
}
return existAddress, nil
}
func (c *Controller) getTSName(index int) string {
if index == 0 {
return util.InterconnectionSwitch
}
return fmt.Sprintf("%s%d", util.InterconnectionSwitch, index)
}
func (c *Controller) getTSCidr(index int) (string, error) {
defaultSubnet, err := c.subnetsLister.Get(c.config.DefaultLogicalSwitch)
if err != nil {
return "", err
}
var cidr string
switch defaultSubnet.Spec.Protocol {
case kubeovnv1.ProtocolIPv4:
cidr = fmt.Sprintf("169.254.%d.0/24", 100+index)
case kubeovnv1.ProtocolIPv6:
cidr = fmt.Sprintf("fe80:a9fe:%02x::/112", 100+index)
case kubeovnv1.ProtocolDual:
cidr = fmt.Sprintf("169.254.%d.0/24,fe80:a9fe:%02x::/112", 100+index, 100+index)
}
return cidr, nil
}