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clbDetails.go
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clbDetails.go
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/*
* Tencent is pleased to support the open source community by making Blueking Container Service available.
* Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
* Licensed under the MIT License (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
* http://opensource.org/licenses/MIT
* 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 qcloud
import (
"fmt"
"reflect"
"strconv"
"github.com/Tencent/bk-bcs/bcs-common/common/blog"
loadbalance "github.com/Tencent/bk-bcs/bcs-services/bcs-clb-controller/pkg/apis/network/v1"
)
func (clb *ClbClient) addListener(ls *loadbalance.CloudListener) error {
// create name
listenerID, err := clb.clbAdapter.CreateListener(ls)
if err != nil {
return fmt.Errorf("create listener failed, %s", err.Error())
}
// set listener id
ls.Spec.ListenerID = listenerID
if ls.Spec.Protocol == loadbalance.ClbListenerProtocolTCP ||
ls.Spec.Protocol == loadbalance.ClbListenerProtocolUDP {
// register backends for 4 layer protocol
// when failed, we do not record these backends in cache
// max backends for each register is LimitationMaxBackendNumEachBind (20)
effectedBackends := make([]*loadbalance.Backend, 0)
for i := 0; i < len(ls.Spec.TargetGroup.Backends); i = i + LimitationMaxBackendNumEachBind {
tmpBackends := GetBackendsSegment(ls.Spec.TargetGroup.Backends, i, LimitationMaxBackendNumEachBind)
err := clb.clbAdapter.Register4LayerBackends(ls.Spec.LoadBalancerID, ls.Spec.ListenerID, tmpBackends)
if err != nil {
blog.Warnf("register 4 layer listener backends %v failed, %s", tmpBackends, err.Error())
break
}
effectedBackends = append(effectedBackends, tmpBackends...)
}
ls.Spec.TargetGroup.Backends = effectedBackends
} else if ls.Spec.Protocol == loadbalance.ClbListenerProtocolHTTP ||
ls.Spec.Protocol == loadbalance.ClbListenerProtocolHTTPS {
var successRuleList loadbalance.RuleList
// each rule corresponds to a target group
// when failed in creating rule, we do not record this rule in cache
// the listener is new, so we call **doCreateRule** directly
for _, rule := range ls.Spec.Rules {
err := clb.doCreateRule(ls, rule)
if err != nil {
blog.Warnf("createRule domain:%s url:%s targetGroup:%v failed, %s",
rule.Domain, rule.URL, rule.TargetGroup, err.Error())
continue
}
successRuleList = append(successRuleList, rule)
}
ls.Spec.Rules = successRuleList
} else {
return fmt.Errorf("add listener failed, unsupported listener protocol %s", ls.Spec.Protocol)
}
return nil
}
// update4LayerListener update 4 layer listener
// when listener protocol
func (clb *ClbClient) update4LayerListener(old, cur *loadbalance.CloudListener) error {
if old.IsEqual(cur) {
blog.Warnf("the old listener %s is equal to the new one, no need to update", old.GetName())
return nil
}
if !old.Spec.TargetGroup.IsAttrEqual(cur.Spec.TargetGroup) {
blog.Infof("update attr of listener %s.%s", old.GetName(), old.GetNamespace())
err := clb.clbAdapter.ModifyListenerAttribute(cur)
if err != nil {
blog.Errorf("update attr of listener %s.%s failed, err %s",
old.GetName(), old.GetNamespace(), err.Error())
return fmt.Errorf("update attr of listener %s.%s failed, err %s",
old.GetName(), old.GetNamespace(), err.Error())
}
}
// update backends
backendsDel, backendsNew := old.Spec.TargetGroup.GetDiffBackend(cur.Spec.TargetGroup)
blog.Infof("get %d backend to del: %v", len(backendsDel), backendsDel)
blog.Infof("get %d backend to add: %v", len(backendsNew), backendsNew)
for _, backend := range backendsNew {
clbBackendsAddMetric.WithLabelValues(backend.IP, strconv.Itoa(backend.Port)).Inc()
}
for _, backend := range backendsDel {
clbBackendsDeleteMetric.WithLabelValues(backend.IP, strconv.Itoa(backend.Port)).Inc()
}
// deregister old backend
if len(backendsDel) > 0 {
for i := 0; i < len(backendsDel); i = i + LimitationMaxBackendNumEachBind {
tmpBackends := GetBackendsSegment(backendsDel, i, LimitationMaxBackendNumEachBind)
err := clb.clbAdapter.DeRegister4LayerBackends(old.Spec.LoadBalancerID, old.Spec.ListenerID, tmpBackends)
if err != nil {
blog.Warnf("QCloud4LayerDeRegisterTargets backends %v failed, %s", tmpBackends, err.Error())
cur.Spec.TargetGroup.AddBackends(tmpBackends)
}
}
}
//register new backends
if len(backendsNew) > 0 {
for i := 0; i < len(backendsNew); i = i + LimitationMaxBackendNumEachBind {
tmpBackends := GetBackendsSegment(backendsNew, i, LimitationMaxBackendNumEachBind)
err := clb.clbAdapter.Register4LayerBackends(old.Spec.LoadBalancerID, old.Spec.ListenerID, tmpBackends)
if err != nil {
blog.Warnf("QCloud4LayerRegisterBackend backends %v failed, %s", tmpBackends, err.Error())
cur.Spec.TargetGroup.RemoveBackend(tmpBackends)
}
}
}
blog.Infof("update 4 layer listener %s done", cur.GetName())
return nil
}
func (clb *ClbClient) update7LayerListener(old, cur *loadbalance.CloudListener) error {
if old.IsEqual(cur) {
blog.Warn("the old listener is equal to the new one, no need to update")
return nil
}
if cur.Spec.Protocol == loadbalance.ClbListenerProtocolHTTPS {
if !reflect.DeepEqual(old.Spec.TLS, cur.Spec.TLS) {
blog.Infof("update listener %s.%s tls config", old.GetName(), old.GetNamespace())
err := clb.clbAdapter.ModifyListenerAttribute(cur)
if err != nil {
blog.Errorf("update attr of listener %s.%s failed, err %s",
old.GetName(), old.GetNamespace(), err.Error())
return fmt.Errorf("update attr of listener %s.%s failed, err %s",
old.GetName(), old.GetNamespace(), err.Error())
}
}
}
// get deleted rules and new rules
delRules, newRules := old.GetDiffRules(cur)
// get updated rules
olds, updateRules := old.GetUpdateRules(cur)
// update rules
for index, ruleUpdate := range updateRules {
err := clb.updateRule(old, olds[index], ruleUpdate)
if err != nil {
blog.Warnf("updateRule failed listenerId:%s Id:%s domain:%s url:%s, %s",
old.Spec.ListenerID, olds[index].ID, ruleUpdate.Domain, ruleUpdate.URL, err.Error())
continue
}
}
// delete rules
for _, ruleDel := range delRules {
err := clb.deleteRule(old, ruleDel)
if err != nil {
blog.Warnf("createRule failed listenerId:%s Id:%s domain:%s url:%s, %s",
old.Spec.ListenerID, ruleDel.ID, ruleDel.Domain, ruleDel.URL, err.Error())
continue
}
}
// add new rules
for _, ruleNew := range newRules {
err := clb.createRule(old, ruleNew)
if err != nil {
blog.Warnf("createRule failed listenerId:%s domain:%s url:%s, %s",
old.Spec.ListenerID, ruleNew.Domain, ruleNew.URL, err.Error())
continue
}
}
return nil
}
func (clb *ClbClient) createRule(ls *loadbalance.CloudListener, rule *loadbalance.Rule) error {
_, isExisted, err := clb.clbAdapter.DescribeRuleByDomainAndURL(
ls.Spec.LoadBalancerID, ls.Spec.ListenerID, rule.Domain, rule.URL)
if err != nil {
return fmt.Errorf("QCloudDescribeRuleByDomainAndURL failed, %s", err.Error())
}
if isExisted {
blog.Warnf("Rule domain:%s url:%s to be created already existed in qcloud listener %s, clean it first",
rule.Domain, rule.URL, ls.Spec.ListenerID)
err := clb.clbAdapter.DeleteRule(ls.Spec.LoadBalancerID, ls.Spec.ListenerID, rule.Domain, rule.URL)
if err != nil {
return fmt.Errorf("delete rule (domain:%s, url%s) failed, err %s", rule.Domain, rule.URL, err.Error())
}
}
return clb.doCreateRule(ls, rule)
}
// call api to create rule
// TODO: create multiple rules together. temporarily we are not sure if the create rules api is atomic,
// so create rule one by one
func (clb *ClbClient) doCreateRule(ls *loadbalance.CloudListener, rule *loadbalance.Rule) error {
var ruleList loadbalance.RuleList
ruleList = append(ruleList, rule)
err := clb.clbAdapter.CreateRules(ls.Spec.LoadBalancerID, ls.Spec.ListenerID, ruleList)
if err != nil {
return fmt.Errorf("create rule failed, %s", err.Error())
}
descRule, isExisted, err := clb.clbAdapter.DescribeRuleByDomainAndURL(
ls.Spec.LoadBalancerID, ls.Spec.ListenerID, rule.Domain, rule.URL)
if err != nil {
return fmt.Errorf("describe rule (domain %s, url %s) failed after creation", rule.Domain, rule.URL)
}
if !isExisted {
return fmt.Errorf("rule (domain %s, url %s) is not existed after creation", rule.Domain, rule.URL)
}
rule.ID = descRule.ID
// when failed, we do not record these backends in cache
// max backends for each register is LimitationMaxBackendNumEachBind (20)
effectedBackends := make([]*loadbalance.Backend, 0)
for i := 0; i < len(rule.TargetGroup.Backends); i = i + LimitationMaxBackendNumEachBind {
tmpBackends := GetBackendsSegment(rule.TargetGroup.Backends, i, LimitationMaxBackendNumEachBind)
err := clb.clbAdapter.Register7LayerBackends(ls.Spec.LoadBalancerID, ls.Spec.ListenerID, rule.ID, tmpBackends)
if err != nil {
blog.Warnf("register 7 layer listener backends %v failed, %s", tmpBackends, err.Error())
break
}
effectedBackends = append(effectedBackends, tmpBackends...)
}
rule.TargetGroup.Backends = effectedBackends
blog.Info("Create rule domain:%s url:%s for listener %s successfully", rule.Domain, rule.URL, ls.GetName())
return nil
}
func (clb *ClbClient) updateRule(
ls *loadbalance.CloudListener, ruleOld *loadbalance.Rule, ruleUpdate *loadbalance.Rule) error {
existedRule, isExisted, err := clb.clbAdapter.DescribeRuleByDomainAndURL(
ls.Spec.LoadBalancerID, ls.Spec.ListenerID, ruleOld.Domain, ruleOld.URL)
if err != nil {
return fmt.Errorf("QCloudDescribeRule failed, %s", err.Error())
}
if !isExisted {
blog.Warnf("old rule %s %s %s does not exists, try to create new rule", ruleOld.ID, ruleOld.Domain, ruleOld.URL)
err := clb.doCreateRule(ls, ruleUpdate)
if err != nil {
return fmt.Errorf("createRule domain:%s url:%s for listener %s failed, %s",
ruleUpdate.Domain, ruleUpdate.URL, ls.GetName(), err.Error())
}
return nil
}
// because the new rule struct has no id info
ruleUpdate.ID = existedRule.ID
if !ruleOld.TargetGroup.IsAttrEqual(ruleUpdate.TargetGroup) {
err := clb.clbAdapter.ModifyRuleAttribute(ls.Spec.LoadBalancerID, ls.Spec.ListenerID, ruleUpdate)
if err != nil {
blog.Infof("modify rule of lb %s listener %s config failed, err %s",
ls.Spec.LoadBalancerID, ls.Spec.ListenerID, err.Error())
return fmt.Errorf("modify rule of lb %s listener %s config failed, err %s",
ls.Spec.LoadBalancerID, ls.Spec.ListenerID, err.Error())
}
}
backendsDel, backendsNew := ruleOld.TargetGroup.GetDiffBackend(ruleUpdate.TargetGroup)
for _, backend := range backendsNew {
clbBackendsAddMetric.WithLabelValues(backend.IP, strconv.Itoa(backend.Port)).Inc()
}
for _, backend := range backendsDel {
clbBackendsDeleteMetric.WithLabelValues(backend.IP, strconv.Itoa(backend.Port)).Inc()
}
// 2.1 deregister old backend
if len(backendsDel) > 0 {
for i := 0; i < len(backendsDel); i = i + LimitationMaxBackendNumEachBind {
tmpBackends := GetBackendsSegment(backendsDel, i, LimitationMaxBackendNumEachBind)
err := clb.clbAdapter.DeRegister7LayerBackends(ls.Spec.LoadBalancerID, ls.Spec.ListenerID,
ruleUpdate.ID, tmpBackends)
if err != nil {
blog.Warnf("Deregister 7 Layer Backends %v failed, %s", tmpBackends, err.Error())
ruleUpdate.TargetGroup.AddBackends(tmpBackends)
}
}
}
//2.2 register new backend
if len(backendsNew) > 0 {
for i := 0; i < len(backendsNew); i = i + LimitationMaxBackendNumEachBind {
tmpBackends := GetBackendsSegment(backendsNew, i, LimitationMaxBackendNumEachBind)
err := clb.clbAdapter.Register7LayerBackends(ls.Spec.LoadBalancerID, ls.Spec.ListenerID,
ruleUpdate.ID, tmpBackends)
if err != nil {
blog.Warnf("Register 7Layer Backends %v failed, %s", tmpBackends, err.Error())
ruleUpdate.TargetGroup.RemoveBackend(tmpBackends)
}
}
}
blog.Info("update rule id:%s domain:%s url:%s done", ruleUpdate.ID, ruleUpdate.Domain, ruleUpdate.URL)
return nil
}
func (clb *ClbClient) deleteRule(ls *loadbalance.CloudListener, ruleOld *loadbalance.Rule) error {
_, isExisted, err := clb.clbAdapter.DescribeRuleByDomainAndURL(ls.Spec.LoadBalancerID, ls.Spec.ListenerID,
ruleOld.Domain, ruleOld.URL)
if err != nil {
return fmt.Errorf("describe rule by domain %s url %s failed, %s", ruleOld.Domain, ruleOld.URL, err.Error())
}
if !isExisted {
blog.Warnf("old rule (id:%s domain:%s url:%s) does not exists, no need to delete",
ruleOld.ID, ruleOld.Domain, ruleOld.URL)
return nil
}
err = clb.clbAdapter.DeleteRule(ls.Spec.LoadBalancerID, ls.Spec.ListenerID, ruleOld.Domain, ruleOld.URL)
if err != nil {
return fmt.Errorf("delete rule (id:%s domain:%s url:%s) failed, %s",
ruleOld.ID, ruleOld.Domain, ruleOld.URL, err.Error())
}
return nil
}