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external-gw.go
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external-gw.go
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package controller
import (
"context"
"encoding/json"
"fmt"
"reflect"
"strings"
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"
"github.com/kubeovn/kube-ovn/pkg/util"
)
var (
exGwEnabled = "unknown"
lastExGwCM map[string]string = nil
)
func (c *Controller) resyncExternalGateway() {
cm, err := c.configMapsLister.ConfigMaps(c.config.ExternalGatewayConfigNS).Get(util.ExternalGatewayConfig)
if err != nil && !k8serrors.IsNotFound(err) {
klog.Errorf("failed to get ovn-external-gw-config, %v", err)
return
}
if k8serrors.IsNotFound(err) || cm.Data["enable-external-gw"] == "false" {
if exGwEnabled == "false" {
return
}
klog.Info("start to remove ovn external gw")
if err := c.removeExternalGateway(); err != nil {
klog.Errorf("failed to remove ovn external gw, %v", err)
return
}
if err := c.updateDefaultVpcExternal(false); err != nil {
klog.Error("failed to update default vpc, %v", err)
return
}
exGwEnabled = "false"
lastExGwCM = nil
klog.Info("finish remove ovn external gw")
return
} else {
if exGwEnabled == "true" && lastExGwCM != nil && reflect.DeepEqual(cm.Data, lastExGwCM) {
return
}
klog.Infof("last external gw configmap: %v", lastExGwCM)
if (lastExGwCM["type"] == "distributed" && cm.Data["type"] == "centralized") ||
lastExGwCM != nil && !reflect.DeepEqual(lastExGwCM["external-gw-nodes"], cm.Data["external-gw-nodes"]) {
klog.Info("external gw nodes list changed, start to remove ovn external gw")
if err := c.removeExternalGateway(); err != nil {
klog.Errorf("failed to remove old ovn external gw, %v", err)
return
}
}
klog.Info("start to establish ovn external gw")
if err := c.establishExternalGateway(cm.Data); err != nil {
klog.Errorf("failed to establish ovn-external-gw, %v", err)
return
}
exGwEnabled = "true"
lastExGwCM = cm.Data
c.ExternalGatewayType = cm.Data["type"]
if err := c.updateDefaultVpcExternal(true); err != nil {
klog.Error("failed to update default vpc, %v", err)
return
}
klog.Info("finish establishing ovn external gw")
}
}
func (c *Controller) removeExternalGateway() error {
sel, _ := metav1.LabelSelectorAsSelector(&metav1.LabelSelector{MatchLabels: map[string]string{util.ExGatewayLabel: "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.ExGatewayLabel] = "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 external gw node %s failed %v", no.Name, err)
return err
}
}
keepExternalSubnet := false
externalSubnet, err := c.subnetsLister.Get(c.config.ExternalGatewaySwitch)
if err != nil {
if !k8serrors.IsNotFound(err) {
klog.Errorf("failed to get subnet %s, %v", c.config.ExternalGatewaySwitch, err)
return err
}
} else {
if externalSubnet.Spec.Vlan != "" {
keepExternalSubnet = true
}
}
if !keepExternalSubnet {
klog.Infof("delete external gateway switch %s", c.config.ExternalGatewaySwitch)
if err := c.ovnClient.DeleteLogicalGatewaySwitch(util.ExternalGatewaySwitch, c.config.ClusterRouter); err != nil {
klog.Errorf("delete external gateway switch %s: %v", util.ExternalGatewaySwitch, err)
return err
}
} else {
klog.Infof("should keep provider network vlan underlay external gateway switch %s", c.config.ExternalGatewaySwitch)
lrpName := fmt.Sprintf("%s-%s", c.config.ClusterRouter, c.config.ExternalGatewaySwitch)
klog.Infof("delete logical router port %s", lrpName)
if err := c.ovnClient.DeleteLogicalRouterPort(lrpName); err != nil {
klog.Errorf("failed to delete lrp %s, %v", lrpName, err)
return err
}
}
return nil
}
func (c *Controller) establishExternalGateway(config map[string]string) error {
chassises, err := c.getGatewayChassis(config)
if err != nil {
klog.Errorf("failed to get gateway chassis, %v", err)
return err
}
var lrpIp, lrpMac string
lrpName := fmt.Sprintf("%s-%s", c.config.ClusterRouter, c.config.ExternalGatewaySwitch)
lrp, err := c.ovnClient.GetLogicalRouterPort(lrpName, true)
if err != nil {
klog.Errorf("failed to get lrp %s, %v", lrpName, err)
return err
}
if lrp != nil {
klog.Infof("lrp %s already exist", lrpName)
lrpMac = lrp.MAC
lrpIp = lrp.Networks[0]
} else if config["nic-ip"] == "" {
if lrpIp, lrpMac, err = c.createDefaultVpcLrpEip(config); err != nil {
klog.Errorf("failed to create ovn eip for default vpc lrp: %v", err)
return err
}
} else {
lrpIp = config["nic-ip"]
lrpMac = config["nic-mac"]
}
if err := c.ovnClient.CreateGatewayLogicalSwitch(c.config.ExternalGatewaySwitch, c.config.ClusterRouter, c.config.ExternalGatewayNet, lrpIp, lrpMac, c.config.ExternalGatewayVlanID, chassises...); err != nil {
klog.Errorf("create external gateway switch %s: %v", c.config.ExternalGatewaySwitch, err)
return err
}
return nil
}
func (c *Controller) createDefaultVpcLrpEip(config map[string]string) (string, string, error) {
cachedSubnet, err := c.subnetsLister.Get(c.config.ExternalGatewaySwitch)
if err != nil {
klog.Errorf("failed to get subnet %s, %v", c.config.ExternalGatewaySwitch, err)
return "", "", err
}
needCreateEip := false
lrpEipName := fmt.Sprintf("%s-%s", c.config.ClusterRouter, c.config.ExternalGatewaySwitch)
cachedEip, err := c.ovnEipsLister.Get(lrpEipName)
if err != nil {
if !k8serrors.IsNotFound(err) {
klog.Errorf("failed to get eip %s, %v", lrpEipName, err)
return "", "", err
}
needCreateEip = true
}
var v4ip, mac string
if !needCreateEip {
v4ip = cachedEip.Status.V4Ip
mac = cachedEip.Status.MacAddress
if v4ip == "" || mac == "" {
err = fmt.Errorf("lrp '%s' ip or mac should not be empty", lrpEipName)
klog.Error(err)
return "", "", err
}
} else {
var v6ip string
v4ip, v6ip, mac, err = c.acquireIpAddress(c.config.ExternalGatewaySwitch, lrpEipName, lrpEipName)
if err != nil {
klog.Errorf("failed to acquire ip address for default vpc lrp %s, %v", lrpEipName, err)
return "", "", err
}
if err := c.createOrUpdateCrdOvnEip(lrpEipName, c.config.ExternalGatewaySwitch, v4ip, v6ip, mac, util.LrpUsingEip); err != nil {
klog.Errorf("failed to create ovn eip cr for lrp %s, %v", lrpEipName, err)
return "", "", err
}
}
v4ipCidr := util.GetIpAddrWithMask(v4ip, cachedSubnet.Spec.CIDRBlock)
return v4ipCidr, mac, nil
}
func (c *Controller) getGatewayChassis(config map[string]string) ([]string, error) {
chassises := []string{}
nodes, err := c.nodesLister.List(labels.Everything())
if err != nil {
klog.Errorf("failed to list nodes, %v", err)
return chassises, err
}
gwNodes := make([]string, 0, len(nodes))
for _, node := range nodes {
gwNodes = append(gwNodes, node.Name)
}
if config["type"] != "distributed" {
gwNodes = strings.Split(config["external-gw-nodes"], ",")
}
for _, gw := range gwNodes {
gw = strings.TrimSpace(gw)
cachedNode, err := c.nodesLister.Get(gw)
if err != nil {
klog.Errorf("failed to get gw node %s, %v", gw, err)
return chassises, err
}
node := cachedNode.DeepCopy()
patchPayloadTemplate :=
`[{
"op": "%s",
"path": "/metadata/labels",
"value": %s
}]`
op := "replace"
if len(node.Labels) == 0 {
op = "add"
}
node.Labels[util.ExGatewayLabel] = "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 external gw node %s failed %v", gw, err)
return chassises, err
}
chassisID, err := c.ovnLegacyClient.GetChassis(gw)
if err != nil {
klog.Errorf("failed to get external gw %s chassisID, %v", gw, err)
return chassises, err
}
if chassisID == "" {
return chassises, fmt.Errorf("no chassisID for external gw %s", gw)
}
chassises = append(chassises, chassisID)
}
if len(chassises) == 0 {
klog.Error("no available external gw")
return chassises, fmt.Errorf("no available external gw")
}
return chassises, nil
}
func (c *Controller) updateDefaultVpcExternal(enableExternal bool) error {
cachedVpc, err := c.vpcsLister.Get(c.config.ClusterRouter)
if err != nil {
klog.Errorf("failed to get vpc %s, %v", c.config.ClusterRouter, err)
return err
}
vpc := cachedVpc.DeepCopy()
if vpc.Spec.EnableExternal != enableExternal {
vpc.Spec.EnableExternal = enableExternal
if _, err := c.config.KubeOvnClient.KubeovnV1().Vpcs().Update(context.Background(), vpc, metav1.UpdateOptions{}); err != nil {
errMsg := fmt.Errorf("failed to update vpc enable external %s, %v", vpc.Name, err)
klog.Error(errMsg)
return err
}
}
if vpc.Status.EnableExternal != enableExternal {
vpc.Status.EnableExternal = enableExternal
bytes, err := vpc.Status.Bytes()
if err != nil {
klog.Errorf("failed to get vpc bytes, %v", err)
return err
}
if _, err = c.config.KubeOvnClient.KubeovnV1().Vpcs().Patch(context.Background(),
vpc.Name, types.MergePatchType, bytes, metav1.PatchOptions{}, "status"); err != nil {
klog.Errorf("failed to patch vpc %s, %v", c.config.ClusterRouter, err)
return err
}
lrpEipName := fmt.Sprintf("%s-%s", c.config.ClusterRouter, c.config.ExternalGatewaySwitch)
if err := c.patchLrpOvnEipEnableBfdLabel(lrpEipName, vpc.Spec.EnableBfd); err != nil {
klog.Errorf("failed to patch label for lrp %s, %v", lrpEipName, err)
return err
}
}
return nil
}