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ovn-nb-load_balancer.go
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ovn-nb-load_balancer.go
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package ovs
import (
"context"
"fmt"
"net"
"sort"
"strconv"
"strings"
"github.com/ovn-org/libovsdb/model"
"github.com/ovn-org/libovsdb/ovsdb"
"k8s.io/klog/v2"
ovsclient "github.com/kubeovn/kube-ovn/pkg/ovsdb/client"
"github.com/kubeovn/kube-ovn/pkg/ovsdb/ovnnb"
"github.com/kubeovn/kube-ovn/pkg/util"
)
// CreateLoadBalancer create loadbalancer
func (c *OVNNbClient) CreateLoadBalancer(lbName, protocol, selectFields string) error {
var (
exist bool
err error
)
if exist, err = c.LoadBalancerExists(lbName); err != nil {
klog.Errorf("failed to get lb: %v", err)
return err
}
// found, ignore
if exist {
return nil
}
var (
ops []ovsdb.Operation
lb *ovnnb.LoadBalancer
)
lb = &ovnnb.LoadBalancer{
UUID: ovsclient.NamedUUID(),
Name: lbName,
Protocol: &protocol,
}
if len(selectFields) != 0 {
lb.SelectionFields = []string{selectFields}
}
if ops, err = c.ovsDbClient.Create(lb); err != nil {
return fmt.Errorf("generate operations for creating load balancer %s: %v", lbName, err)
}
if err = c.Transact("lb-add", ops); err != nil {
return fmt.Errorf("create load balancer %s: %v", lbName, err)
}
return nil
}
// UpdateLoadBalancer update load balancer
func (c *OVNNbClient) UpdateLoadBalancer(lb *ovnnb.LoadBalancer, fields ...interface{}) error {
var (
ops []ovsdb.Operation
err error
)
if ops, err = c.ovsDbClient.Where(lb).Update(lb, fields...); err != nil {
return fmt.Errorf("generate operations for updating load balancer %s: %v", lb.Name, err)
}
if err = c.Transact("lb-update", ops); err != nil {
return fmt.Errorf("update load balancer %s: %v", lb.Name, err)
}
return nil
}
// LoadBalancerAddVips adds or updates a vip
func (c *OVNNbClient) LoadBalancerAddVip(lbName, vip string, backends ...string) error {
var (
ops []ovsdb.Operation
err error
)
if _, err = c.GetLoadBalancer(lbName, false); err != nil {
klog.Errorf("failed to get lb health check: %v", err)
return err
}
sort.Strings(backends)
if ops, err = c.LoadBalancerOp(
lbName,
func(lb *ovnnb.LoadBalancer) []model.Mutation {
var (
mutations = make([]model.Mutation, 0, 2)
value = strings.Join(backends, ",")
)
if len(lb.Vips) != 0 {
if lb.Vips[vip] == value {
return nil
}
mutations = append(
mutations,
model.Mutation{
Field: &lb.Vips,
Value: map[string]string{vip: lb.Vips[vip]},
Mutator: ovsdb.MutateOperationDelete,
},
)
}
mutations = append(
mutations,
model.Mutation{
Field: &lb.Vips,
Value: map[string]string{vip: value},
Mutator: ovsdb.MutateOperationInsert,
},
)
return mutations
},
); err != nil {
return fmt.Errorf("failed to generate operations when adding vip %s with backends %v to load balancers %s: %v", vip, backends, lbName, err)
}
if ops != nil {
if err = c.Transact("lb-add", ops); err != nil {
return fmt.Errorf("failed to add vip %s with backends %v to load balancers %s: %v", vip, backends, lbName, err)
}
}
return nil
}
// LoadBalancerDeleteVip deletes load balancer vip
func (c *OVNNbClient) LoadBalancerDeleteVip(lbName, vipEndpoint string, ignoreHealthCheck bool) error {
var (
ops []ovsdb.Operation
lb *ovnnb.LoadBalancer
lbhc *ovnnb.LoadBalancerHealthCheck
err error
)
lb, lbhc, err = c.GetLoadBalancerHealthCheck(lbName, vipEndpoint, true)
if err != nil {
klog.Errorf("failed to get lb health check: %v", err)
return err
}
if !ignoreHealthCheck && lbhc != nil {
klog.Infof("clean health check for lb %s with vip %s", lbName, vipEndpoint)
// delete ip port mapping
if err = c.LoadBalancerDeleteIPPortMapping(lbName, vipEndpoint); err != nil {
klog.Errorf("failed to delete lb ip port mapping: %v", err)
return err
}
if lbhc != nil {
if err = c.LoadBalancerDeleteHealthCheck(lbName, lbhc.UUID); err != nil {
klog.Errorf("failed to delete lb health check: %v", err)
return err
}
}
}
if lb == nil || len(lb.Vips) == 0 {
return nil
}
if _, ok := lb.Vips[vipEndpoint]; !ok {
return nil
}
ops, err = c.LoadBalancerOp(
lbName,
func(lb *ovnnb.LoadBalancer) []model.Mutation {
return []model.Mutation{
{
Field: &lb.Vips,
Value: map[string]string{vipEndpoint: lb.Vips[vipEndpoint]},
Mutator: ovsdb.MutateOperationDelete,
},
}
},
)
if err != nil {
return fmt.Errorf("failed to generate operations when deleting vip %s from load balancers %s: %v", vipEndpoint, lbName, err)
}
if len(ops) == 0 {
return nil
}
if err = c.Transact("lb-add", ops); err != nil {
return fmt.Errorf("failed to delete vip %s from load balancers %s: %v", vipEndpoint, lbName, err)
}
return nil
}
// SetLoadBalancerAffinityTimeout sets the LB's affinity timeout in seconds
func (c *OVNNbClient) SetLoadBalancerAffinityTimeout(lbName string, timeout int) error {
var (
options map[string]string
lb *ovnnb.LoadBalancer
value string
err error
)
if lb, err = c.GetLoadBalancer(lbName, false); err != nil {
klog.Errorf("failed to get lb: %v", err)
return err
}
if value = strconv.Itoa(timeout); len(lb.Options) != 0 && lb.Options["affinity_timeout"] == value {
return nil
}
options = make(map[string]string, len(lb.Options)+1)
for k, v := range lb.Options {
options[k] = v
}
options["affinity_timeout"] = value
lb.Options = options
if err = c.UpdateLoadBalancer(lb, &lb.Options); err != nil {
return fmt.Errorf("failed to set affinity timeout of lb %s to %d: %v", lbName, timeout, err)
}
return nil
}
// DeleteLoadBalancers delete several loadbalancer once
func (c *OVNNbClient) DeleteLoadBalancers(filter func(lb *ovnnb.LoadBalancer) bool) error {
var (
ops []ovsdb.Operation
err error
)
if ops, err = c.ovsDbClient.WhereCache(
func(lb *ovnnb.LoadBalancer) bool {
if filter != nil {
return filter(lb)
}
return true
},
).Delete(); err != nil {
return fmt.Errorf("generate operations for delete load balancers: %v", err)
}
if err = c.Transact("lb-del", ops); err != nil {
klog.Errorf("failed to del lbs: %v", err)
return fmt.Errorf("delete load balancers : %v", err)
}
return nil
}
// DeleteLoadBalancer delete loadbalancer
func (c *OVNNbClient) DeleteLoadBalancer(lbName string) error {
var (
ops []ovsdb.Operation
err error
)
ops, err = c.DeleteLoadBalancerOp(lbName)
if err != nil {
klog.Errorf("failed to get delete lb op: %v", err)
return err
}
if err = c.Transact("lb-del", ops); err != nil {
klog.Errorf("failed to del lb: %v", err)
return fmt.Errorf("delete load balancer %s: %v", lbName, err)
}
return nil
}
// GetLoadBalancer get load balancer by name,
// it is because of lack name index that does't use OVNNbClient.Get
func (c *OVNNbClient) GetLoadBalancer(lbName string, ignoreNotFound bool) (*ovnnb.LoadBalancer, error) {
ctx, cancel := context.WithTimeout(context.Background(), c.Timeout)
defer cancel()
var (
lbList []ovnnb.LoadBalancer
err error
)
lbList = make([]ovnnb.LoadBalancer, 0)
if err = c.ovsDbClient.WhereCache(
func(lb *ovnnb.LoadBalancer) bool {
return lb.Name == lbName
},
).List(ctx, &lbList); err != nil {
return nil, fmt.Errorf("failed to list load balancer %q: %v", lbName, err)
}
switch {
// not found
case len(lbList) == 0:
if ignoreNotFound {
return nil, nil
}
return nil, fmt.Errorf("not found load balancer %q", lbName)
case len(lbList) > 1:
return nil, fmt.Errorf("more than one load balancer with same name %q", lbName)
default:
// #nosec G602
return &lbList[0], nil
}
}
func (c *OVNNbClient) LoadBalancerExists(lbName string) (bool, error) {
lrp, err := c.GetLoadBalancer(lbName, true)
return lrp != nil, err
}
// ListLoadBalancers list all load balancers
func (c *OVNNbClient) ListLoadBalancers(filter func(lb *ovnnb.LoadBalancer) bool) ([]ovnnb.LoadBalancer, error) {
ctx, cancel := context.WithTimeout(context.Background(), c.Timeout)
defer cancel()
var (
lbList []ovnnb.LoadBalancer
err error
)
lbList = make([]ovnnb.LoadBalancer, 0)
if err = c.ovsDbClient.WhereCache(
func(lb *ovnnb.LoadBalancer) bool {
if filter != nil {
return filter(lb)
}
return true
},
).List(ctx, &lbList); err != nil {
return nil, fmt.Errorf("failed to list load balancer: %v", err)
}
return lbList, nil
}
func (c *OVNNbClient) LoadBalancerOp(lbName string, mutationsFunc ...func(lb *ovnnb.LoadBalancer) []model.Mutation) ([]ovsdb.Operation, error) {
var (
mutations []model.Mutation
ops []ovsdb.Operation
lb *ovnnb.LoadBalancer
err error
)
if lb, err = c.GetLoadBalancer(lbName, false); err != nil {
klog.Error(err)
return nil, err
}
if len(mutationsFunc) == 0 {
return nil, nil
}
mutations = make([]model.Mutation, 0, len(mutationsFunc))
for _, f := range mutationsFunc {
if mutation := f(lb); mutation != nil {
mutations = append(mutations, mutation...)
}
}
if len(mutations) == 0 {
return nil, nil
}
if ops, err = c.ovsDbClient.Where(lb).Mutate(lb, mutations...); err != nil {
klog.Error(err)
return nil, fmt.Errorf("generate operations for mutating load balancer %s: %v", lb.Name, err)
}
return ops, nil
}
// DeleteLoadBalancerOp create operation which delete load balancer
func (c *OVNNbClient) DeleteLoadBalancerOp(lbName string) ([]ovsdb.Operation, error) {
var (
ops []ovsdb.Operation
lb *ovnnb.LoadBalancer
err error
)
if lb, err = c.GetLoadBalancer(lbName, true); err != nil {
klog.Error(err)
return nil, err
}
// not found, skip
if lb == nil {
return nil, nil
}
if ops, err = c.Where(lb).Delete(); err != nil {
klog.Error(err)
return nil, err
}
return ops, nil
}
// LoadBalancerAddIPPortMapping add load balancer ip port mapping
func (c *OVNNbClient) LoadBalancerAddIPPortMapping(lbName, vipEndpoint string, mappings map[string]string) error {
if len(mappings) == 0 {
return nil
}
var (
ops []ovsdb.Operation
err error
)
if ops, err = c.LoadBalancerOp(
lbName,
func(lb *ovnnb.LoadBalancer) []model.Mutation {
return []model.Mutation{
{
Field: &lb.IPPortMappings,
Value: mappings,
Mutator: ovsdb.MutateOperationInsert,
},
}
},
); err != nil {
return fmt.Errorf("failed to generate operations when adding ip port mapping with vip %v to load balancers %s: %v", vipEndpoint, lbName, err)
}
if err = c.Transact("lb-add", ops); err != nil {
return fmt.Errorf("failed to add ip port mapping with vip %v to load balancers %s: %v", vipEndpoint, lbName, err)
}
return nil
}
// LoadBalancerDeleteIPPortMapping delete load balancer ip port mapping
func (c *OVNNbClient) LoadBalancerDeleteIPPortMapping(lbName, vipEndpoint string) error {
var (
ops []ovsdb.Operation
lb *ovnnb.LoadBalancer
mappings map[string]string
vip string
err error
)
if lb, err = c.GetLoadBalancer(lbName, true); err != nil {
klog.Errorf("failed to get lb health check: %v", err)
return err
}
if lb == nil {
klog.Infof("lb %s already deleted", lbName)
return nil
}
if len(lb.IPPortMappings) == 0 {
klog.Infof("lb %s has no ip port mapping", lbName)
return nil
}
if vip, _, err = net.SplitHostPort(vipEndpoint); err != nil {
err := fmt.Errorf("failed to split host port: %v", err)
klog.Error(err)
return err
}
mappings = lb.IPPortMappings
for portIP, portMapVip := range lb.IPPortMappings {
splits := strings.Split(portMapVip, ":")
if len(splits) == 2 && splits[1] == vip {
delete(mappings, portIP)
}
}
if ops, err = c.LoadBalancerOp(
lbName,
func(lb *ovnnb.LoadBalancer) []model.Mutation {
return []model.Mutation{
{
Field: &lb.IPPortMappings,
Value: mappings,
Mutator: ovsdb.MutateOperationDelete,
},
}
},
); err != nil {
return fmt.Errorf("failed to generate operations when deleting ip port mapping %s from load balancers %s: %v", vipEndpoint, lbName, err)
}
if len(ops) == 0 {
return nil
}
if err = c.Transact("lb-del", ops); err != nil {
return fmt.Errorf("failed to delete ip port mappings %s from load balancer %s: %v", vipEndpoint, lbName, err)
}
return nil
}
// LoadBalancerUpdateIPPortMapping update load balancer ip port mapping
func (c *OVNNbClient) LoadBalancerUpdateIPPortMapping(lbName, vipEndpoint string, ipPortMappings map[string]string) error {
if len(ipPortMappings) != 0 {
ops, err := c.LoadBalancerOp(
lbName,
func(lb *ovnnb.LoadBalancer) []model.Mutation {
return []model.Mutation{
{
Field: &lb.IPPortMappings,
Value: ipPortMappings,
Mutator: ovsdb.MutateOperationInsert,
},
}
},
)
if err != nil {
return fmt.Errorf("failed to generate operations when adding ip port mapping with vip %v to load balancers %s: %v", vipEndpoint, lbName, err)
}
if err = c.Transact("lb-add", ops); err != nil {
return fmt.Errorf("failed to add ip port mapping with vip %v to load balancers %s: %v", vipEndpoint, lbName, err)
}
}
return nil
}
// LoadBalancerAddHealthCheck adds health check
func (c *OVNNbClient) LoadBalancerAddHealthCheck(lbName, vipEndpoint string, ignoreHealthCheck bool, ipPortMapping, externals map[string]string) error {
klog.Infof("lb %s health check use ip port mapping %v", lbName, ipPortMapping)
if err := c.LoadBalancerUpdateIPPortMapping(lbName, vipEndpoint, ipPortMapping); err != nil {
klog.Errorf("failed to update lb ip port mapping: %v", err)
return err
}
if !ignoreHealthCheck {
klog.Infof("add health check for lb %s with vip %s and health check vip maps %v", lbName, vipEndpoint, ipPortMapping)
if err := c.AddLoadBalancerHealthCheck(lbName, vipEndpoint, externals); err != nil {
klog.Errorf("failed to create lb health check: %v", err)
return err
}
}
return nil
}
// LoadBalancerDeleteHealthCheck delete load balancer health check
func (c *OVNNbClient) LoadBalancerDeleteHealthCheck(lbName, uuid string) error {
var (
ops []ovsdb.Operation
lb *ovnnb.LoadBalancer
err error
)
if lb, err = c.GetLoadBalancer(lbName, false); err != nil {
klog.Errorf("failed to get lb: %v", err)
return err
}
if util.ContainsString(lb.HealthCheck, uuid) {
ops, err = c.LoadBalancerOp(
lbName,
func(lb *ovnnb.LoadBalancer) []model.Mutation {
return []model.Mutation{
{
Field: &lb.HealthCheck,
Value: []string{uuid},
Mutator: ovsdb.MutateOperationDelete,
},
}
},
)
if err != nil {
return fmt.Errorf("failed to generate operations when deleting health check %s from load balancers %s: %v", uuid, lbName, err)
}
if len(ops) == 0 {
return nil
}
if err = c.Transact("lb-del", ops); err != nil {
return fmt.Errorf("failed to delete health check %s from load balancers %s: %v", uuid, lbName, err)
}
}
return nil
}
// LoadBalancerUpdateHealthCheckOp create operations add to or delete health check from it
func (c *OVNNbClient) LoadBalancerUpdateHealthCheckOp(lbName string, lbhcUUIDs []string, op ovsdb.Mutator) ([]ovsdb.Operation, error) {
if len(lbhcUUIDs) == 0 {
return nil, nil
}
return c.LoadBalancerOp(
lbName,
func(lb *ovnnb.LoadBalancer) []model.Mutation {
return []model.Mutation{
{
Field: &lb.HealthCheck,
Value: lbhcUUIDs,
Mutator: op,
},
}
},
)
}