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|
package rule
import (
"fmt"
"sync"
"time"
"k8s.io/klog/v2"
routerv1 "github.com/kubeedge/api/rules/v1"
"github.com/kubeedge/beehive/pkg/core/model"
"github.com/kubeedge/kubeedge/cloud/pkg/common/modules"
"github.com/kubeedge/kubeedge/cloud/pkg/router/listener"
"github.com/kubeedge/kubeedge/cloud/pkg/router/provider"
)
var (
rules sync.Map
ruleEndpoints sync.Map
)
func init() {
registerListener()
}
func registerListener() {
endpointKey := fmt.Sprintf("%s/%s", modules.EdgeControllerModuleName, model.ResourceTypeRuleEndpoint)
listener.MessageHandlerInstance.AddListener(endpointKey, handleRuleEndpoint)
ruleKey := fmt.Sprintf("%s/%s", modules.EdgeControllerModuleName, model.ResourceTypeRule)
listener.MessageHandlerInstance.AddListener(ruleKey, handleRule)
}
// implement listener.Handle
func handleRuleEndpoint(data interface{}) (interface{}, error) {
message, ok := data.(*model.Message)
if !ok {
klog.Warningf("object type: %T unsupported", data)
return nil, fmt.Errorf("data type is %T", data)
}
ruleEndpoint, ok := message.Content.(*routerv1.RuleEndpoint)
if !ok {
klog.Warningf("object type: %T unsupported", message.Content)
return nil, fmt.Errorf("message content type should be ruleEndpoint type. operation: %s, resource: %s",
message.GetOperation(), message.GetResource())
}
switch message.GetOperation() {
case model.InsertOperation:
addRuleEndpoint(ruleEndpoint)
case model.DeleteOperation:
deleteRuleEndpoint(ruleEndpoint.Namespace, ruleEndpoint.Name)
default:
klog.Warningf("invalid message operation.")
}
return nil, nil
}
// implement listener.Handle
func handleRule(data interface{}) (interface{}, error) {
message, ok := data.(*model.Message)
if !ok {
klog.Warningf("object type: %T unsupported", data)
return nil, fmt.Errorf("data type is %T", data)
}
rule, ok := message.Content.(*routerv1.Rule)
if !ok {
klog.Warningf("object type: %T unsupported", message.Content)
return nil, fmt.Errorf("message content type should be rule type. operation: %s, resource: %s",
message.GetOperation(), message.GetResource())
}
switch message.GetOperation() {
case model.InsertOperation:
addRuleWithRetry(rule)
case model.DeleteOperation:
delRule(rule.Namespace, rule.Name)
default:
klog.Warningf("invalid message operation.")
}
return nil, nil
}
func addRuleEndpoint(ruleEndpoint *routerv1.RuleEndpoint) {
key := getKey(ruleEndpoint.Namespace, ruleEndpoint.Name)
ruleEndpoints.Store(key, ruleEndpoint)
klog.Infof("add ruleendpoint %s success.", key)
}
func deleteRuleEndpoint(namespace, name string) {
key := getKey(namespace, name)
ruleEndpoints.Delete(key)
klog.Infof("delete ruleendpoint %s success.", key)
}
// AddRule add rule
func addRule(rule *routerv1.Rule) error {
source, err := getSourceOfRule(rule)
if err != nil {
klog.Error(err)
return err
}
target, err := getTargetOfRule(rule)
if err != nil {
klog.Error(err)
return err
}
ruleKey := getKey(rule.Namespace, rule.Name)
if err := source.RegisterListener(func(data interface{}) (interface{}, error) {
//TODO Use goroutine pool later
var execResult ExecResult
resp, err := source.Forward(target, data)
if err != nil {
// rule.Status.Fail++
// record error info for rule
errMsg := ErrorMsg{Detail: err.Error(), Timestamp: time.Now()}
execResult = ExecResult{RuleID: rule.Name, ProjectID: rule.Namespace, Status: "FAIL", Error: errMsg}
} else {
execResult = ExecResult{RuleID: rule.Name, ProjectID: rule.Namespace, Status: "SUCCESS"}
}
ResultChannel <- execResult
return resp, nil
}); err != nil {
klog.Errorf("add rule %s failed, err: %v", ruleKey, err)
errMsg := ErrorMsg{Detail: err.Error(), Timestamp: time.Now()}
execResult := ExecResult{RuleID: rule.Name, ProjectID: rule.Namespace, Status: "FAIL", Error: errMsg}
ResultChannel <- execResult
return nil
}
rules.Store(ruleKey, rule)
klog.Infof("add rule success: %+v", rule)
return nil
}
// DelRule delete rule by rule id
func delRule(namespace, name string) {
ruleKey := getKey(namespace, name)
v, exist := rules.Load(ruleKey)
if !exist {
klog.Warningf("rule %s does not exist", ruleKey)
return
}
rule := v.(*routerv1.Rule)
source, err := getSourceOfRule(rule)
// if source not exist, skip UnregisterListener
if err == nil {
klog.V(4).Infof("delRule: source of rule:%s exist, do UnregisterListener", rule.Spec.Source)
source.UnregisterListener()
} else {
klog.Warningf("delRule: source of rule:%s not exist, unnecessary do UnregisterListener:%v", rule.Spec.Source, err)
}
rules.Delete(ruleKey)
klog.V(4).Infof("delete rule success: %s", ruleKey)
}
func getSourceOfRule(rule *routerv1.Rule) (provider.Source, error) {
sourceKey := getKey(rule.Namespace, rule.Spec.Source)
v, exist := ruleEndpoints.Load(sourceKey)
if !exist {
return nil, fmt.Errorf("source rule endpoint %s does not existing", sourceKey)
}
sourceEp := v.(*routerv1.RuleEndpoint)
sf, exist := provider.GetSourceFactory(sourceEp.Spec.RuleEndpointType)
if !exist {
return nil, fmt.Errorf("source definition %s does not existing", sourceEp.Spec.RuleEndpointType)
}
source := sf.GetSource(sourceEp, rule.Spec.SourceResource)
if source == nil {
return nil, fmt.Errorf("can't get source: %s", rule.Spec.Source)
}
return source, nil
}
func getTargetOfRule(rule *routerv1.Rule) (provider.Target, error) {
targetKey := getKey(rule.Namespace, rule.Spec.Target)
v, exist := ruleEndpoints.Load(targetKey)
if !exist {
return nil, fmt.Errorf("target rule endpoint %s does not existing", targetKey)
}
targetEp := v.(*routerv1.RuleEndpoint)
tf, exist := provider.GetTargetFactory(targetEp.Spec.RuleEndpointType)
if !exist {
return nil, fmt.Errorf("target definition %s does not existing", targetEp.Spec.RuleEndpointType)
}
target := tf.GetTarget(targetEp, rule.Spec.TargetResource)
if target == nil {
return nil, fmt.Errorf("can't get target: %s", rule.Spec.Target)
}
return target, nil
}
func getKey(namespace, name string) string {
return fmt.Sprintf("%s/%s", namespace, name)
}
func addRuleWithRetry(rule *routerv1.Rule) {
retry, waitTime := 3, 5
for i := 0; i <= retry; i++ {
if err := addRule(rule); err == nil {
break
}
klog.Errorf("add rule fail, wait to retry. retry time: %d", i+1)
time.Sleep(time.Duration(waitTime*(i+1)) * time.Second)
}
}
|
