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package ovn
import (
"encoding/json"
"fmt"
"github.com/vishvananda/netlink"
"math/big"
"math/rand"
"net"
logf "sigs.k8s.io/controller-runtime/pkg/runtime/log"
"strings"
"time"
)
var log = logf.Log.WithName("ovn")
// CreateVlan creates VLAN with vlanID
func CreateVlan(vlanID, interfaceName, logicalInterfaceName string) error {
if interfaceName == "" || vlanID == "" || logicalInterfaceName == "" {
return fmt.Errorf("CreateVlan invalid parameters: %v %v %v", interfaceName, vlanID, logicalInterfaceName)
}
_, err := netlink.LinkByName(logicalInterfaceName)
if err == nil {
return err
}
stdout, stderr, err := RunIP("link", "add", "link", interfaceName, "name", logicalInterfaceName, "type", "vlan", "id", vlanID)
if err != nil {
log.Error(err, "Failed to create Vlan", "stdout", stdout, "stderr", stderr)
return err
}
stdout, stderr, err = RunIP("link", "set", logicalInterfaceName, "alias", "nfn-"+logicalInterfaceName)
if err != nil {
log.Error(err, "Failed to create Vlan", "stdout", stdout, "stderr", stderr)
return err
}
stdout, stderr, err = RunIP("link", "set", "dev", logicalInterfaceName, "up")
if err != nil {
log.Error(err, "Failed to enable Vlan", "stdout", stdout, "stderr", stderr)
return err
}
return nil
}
// DeleteVlan deletes VLAN with logicalInterface Name
func DeleteVlan(logicalInterfaceName string) error {
if logicalInterfaceName == "" {
return fmt.Errorf("DeleteVlan invalid parameters")
}
stdout, stderr, err := RunIP("link", "del", "dev", logicalInterfaceName)
if err != nil {
log.Error(err, "Failed to create Vlan", "stdout", stdout, "stderr", stderr)
return err
}
return nil
}
// GetVlan returns a list of VLAN configured on the node
func GetVlan() []string {
var intfList []string
links, err := netlink.LinkList()
if err != nil {
}
for _, l := range links {
if strings.Contains(l.Attrs().Alias, "nfn-") {
intfList = append(intfList, l.Attrs().Name)
}
}
return intfList
}
// CreatePnBridge creates Provider network bridge and mappings
func CreatePnBridge(nwName, brName, intfName string) error {
if nwName == "" || brName == "" || intfName == "" {
return fmt.Errorf("CreatePnBridge invalid parameters")
}
// Create Bridge
stdout, stderr, err := RunOVSVsctl("--may-exist", "add-br", brName)
if err != nil {
log.Error(err, "Failed to create Bridge", "stdout", stdout, "stderr", stderr)
return err
}
stdout, stderr, err = RunOVSVsctl("--may-exist", "add-port", brName, intfName)
if err != nil {
log.Error(err, "Failed to add port to Bridge", "stdout", stdout, "stderr", stderr)
return err
}
stdout, stderr, err = RunOVSVsctl("set", "bridge", brName, "external_ids:nfn="+nwName)
if err != nil {
log.Error(err, "Failed to set nfn-alias", "stdout", stdout, "stderr", stderr)
return err
}
// Update ovn-bridge-mappings
updateOvnBridgeMapping(brName, nwName, "add")
return nil
}
// DeletePnBridge creates Provider network bridge and mappings
func DeletePnBridge(nwName, brName string) error {
if nwName == "" || brName == "" {
return fmt.Errorf("DeletePnBridge invalid parameters")
}
// Delete Bridge
stdout, stderr, err := RunOVSVsctl("--if-exist", "del-br", brName)
if err != nil {
log.Error(err, "Failed to delete Bridge", "stdout", stdout, "stderr", stderr)
return err
}
updateOvnBridgeMapping(brName, nwName, "delete")
return nil
}
// GetPnBridge returns Provider networks with external ids
func GetPnBridge(externalID string) []string {
if externalID == "" {
log.Error(fmt.Errorf("GetBridge invalid parameters"), "Invalid")
}
stdout, stderr, err := RunOVSVsctl("list-br")
if err != nil {
log.Error(err, "No bridges found", "stdout", stdout, "stderr", stderr)
return nil
}
brNames := strings.Split(stdout, "\n")
var brList []string
for _, name := range brNames {
stdout, stderr, err = RunOVSVsctl("get", "bridge", name, "external_ids:"+externalID)
if err != nil {
if !strings.Contains(stderr, "no key") {
log.Error(err, "Unknown error reading external_ids", "stdout", stdout, "stderr", stderr)
}
continue
}
if stdout == "" {
continue
} else {
brList = append(brList, name)
}
}
return brList
}
// Update ovn-bridge-mappings
func updateOvnBridgeMapping(brName, nwName, action string) error {
stdout, stderr, err := RunOVSVsctl("get", "open", ".", "external-ids:ovn-bridge-mappings")
if err != nil {
if !strings.Contains(stderr, "no key") {
log.Error(err, "Failed to get ovn-bridge-mappings", "stdout", stdout, "stderr", stderr)
return err
}
}
// Convert csv string to map
mm := make(map[string]string)
if len(stdout) > 0 {
am := strings.Split(stdout, ",")
for _, label := range am {
l := strings.Split(label, ":")
if len(l) == 0 {
log.Error(fmt.Errorf("Syntax error label: %v", label), "ovnBridgeMapping")
return nil
}
mm[strings.TrimSpace(l[0])] = strings.TrimSpace(l[1])
}
}
if action == "add" {
mm[nwName] = brName
} else if action == "delete" {
delete(mm, nwName)
if len(mm) == 0 {
// No mapping needed
stdout, stderr, err = RunOVSVsctl("remove", "open", ".", "external-ids", "ovn-bridge-mappings")
if err != nil {
log.Error(err, "Failed to remove ovn-bridge-mappings", "stdout", stdout, "stderr", stderr)
return err
}
return nil
}
} else {
return fmt.Errorf("Invalid action %s", action)
}
var mapping string
for key, value := range mm {
mapping = mapping + fmt.Sprintf("%s:%s,", key, value)
}
// Remove trailing ,
mapping = mapping[:len(mapping)-1]
extIDMap := "external-ids:ovn-bridge-mappings=" + mapping
stdout, stderr, err = RunOVSVsctl("set", "open", ".", extIDMap)
if err != nil {
log.Error(err, "Failed to set ovn-bridge-mappings", "stdout", stdout, "stderr", stderr)
return err
}
return nil
}
func parseOvnNetworkObject(ovnnetwork string) ([]map[string]interface{}, error) {
var ovnNet []map[string]interface{}
if ovnnetwork == "" {
return nil, fmt.Errorf("parseOvnNetworkObject:error")
}
if err := json.Unmarshal([]byte(ovnnetwork), &ovnNet); err != nil {
return nil, fmt.Errorf("parseOvnNetworkObject: failed to load ovn network err: %v | ovn network: %v", err, ovnnetwork)
}
return ovnNet, nil
}
func setupDistributedRouter(name string) error {
// Create a single common distributed router for the cluster.
stdout, stderr, err := RunOVNNbctl("--", "--may-exist", "lr-add", name, "--", "set", "logical_router", name, "external_ids:ovn4nfv-cluster-router=yes")
if err != nil {
log.Error(err, "Failed to create a single common distributed router for the cluster", "stdout", stdout, "stderr", stderr)
return err
}
// Create a logical switch called "ovn4nfv-join" that will be used to connect gateway routers to the distributed router.
// The "ovn4nfv-join" will be allocated IP addresses in the range 100.64.1.0/24.
stdout, stderr, err = RunOVNNbctl("--may-exist", "ls-add", "ovn4nfv-join")
if err != nil {
log.Error(err, "Failed to create logical switch called \"ovn4nfv-join\"", "stdout", stdout, "stderr", stderr)
return err
}
// Connect the distributed router to "ovn4nfv-join".
routerMac, stderr, err := RunOVNNbctl("--if-exist", "get", "logical_router_port", "rtoj-"+name, "mac")
if err != nil {
log.Error(err, "Failed to get logical router port rtoj-", "name", name, "stdout", stdout, "stderr", stderr)
return err
}
if routerMac == "" {
routerMac = generateMac()
stdout, stderr, err = RunOVNNbctl("--", "--may-exist", "lrp-add", name, "rtoj-"+name, routerMac, "100.64.1.1/24", "--", "set", "logical_router_port", "rtoj-"+name, "external_ids:connect_to_ovn4nfvjoin=yes")
if err != nil {
log.Error(err, "Failed to add logical router port rtoj", "name", name, "stdout", stdout, "stderr", stderr)
return err
}
}
// Connect the switch "ovn4nfv-join" to the router.
stdout, stderr, err = RunOVNNbctl("--", "--may-exist", "lsp-add", "ovn4nfv-join", "jtor-"+name, "--", "set", "logical_switch_port", "jtor-"+name, "type=router", "options:router-port=rtoj-"+name, "addresses="+"\""+routerMac+"\"")
if err != nil {
log.Error(err, "Failed to add logical switch port to logical router", "stdout", stdout, "stderr", stderr)
return err
}
return nil
}
// generateMac generates mac address.
func generateMac() string {
prefix := "00:00:00"
newRand := rand.New(rand.NewSource(time.Now().UnixNano()))
mac := fmt.Sprintf("%s:%02x:%02x:%02x", prefix, newRand.Intn(255), newRand.Intn(255), newRand.Intn(255))
return mac
}
// NextIP returns IP incremented by 1
func NextIP(ip net.IP) net.IP {
i := ipToInt(ip)
return intToIP(i.Add(i, big.NewInt(1)))
}
func ipToInt(ip net.IP) *big.Int {
if v := ip.To4(); v != nil {
return big.NewInt(0).SetBytes(v)
}
return big.NewInt(0).SetBytes(ip.To16())
}
func intToIP(i *big.Int) net.IP {
return net.IP(i.Bytes())
}
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