[GitHub] [apisix-ingress-controller] han6565 opened a new issue #778: request help: 新增namespace 然后删除，会一直报not found

[GitBox]

han6565 opened a new issue #778:
URL: https://github.com/apache/apisix-ingress-controller/issues/778


   ### Issue description
   在k8集群内，启动apisix-ingress，新增namespace，然后删除会一直报
   ```
   sync namespace info failed, will retry       {"namespace": "xxx", "error": 
"namespaces \"xxx\" not found"}
   ```
   
研究了一下，应该是删除namespace触发了delete事件后又触发了update事件，由于无法找到对应的namespace所以会一直报错。不知道大家是否也是这样。
   
   另外还有一个问题 
   ```
                        // if labels of namespace contains the watchingLabels, 
the namespace should be set to controller.watchingNamespace
                        if 
c.controller.watchingLabels.IsSubsetOf(namespace.Labels) {
                                
c.controller.watchingNamespace.Store(namespace.Name, struct{}{})
                        }
   ```
   c.controller.watchingLabels.IsSubsetOf(namespace.Labels) 
这句如果我是新增的namespace是不会在watchingLabels里面有值的，也就无法将新的namespace加入到watchingNamespace,不知道是不是我哪里配置有问题。我这边watchingLabels似乎始终是空的
   
   mapConfig
   ```
   data:
     config.yaml: |
       # log options
       log_level: "debug"
       log_output: "stderr"
       http_listen: ":8080"
       enable_profiling: true
       kubernetes:
         kubeconfig: ""
         resync_interval: "6h"
         app_namespaces:
         - "*"
         ingress_class: "apisix"
         ingress_version: "networking/v1"
         apisix_route_version: "apisix.apache.org/v2beta1"
       apisix:
         default_cluster_base_url: "http://172.24.150.14:9180/apisix/admin";
         default_cluster_admin_key: "edd1c9f034335f136f87ad84b625c8f1"
         default_cluster_name: ""
   ```
   
   目前我的解决方法比较暴力，但是新建namespace和删除都可以正常watching
   ```
        if ev.Type != types.EventDelete {
                // check the labels of specify namespace
                namespace, err := 
c.controller.kubeClient.Client.CoreV1().Namespaces().Get(ctx, 
ev.Object.(string), metav1.GetOptions{})
                if err != nil {
                        if strings.Index(err.Error(), "not found") > 0 && 
ev.Type == types.EventUpdate {
                                return nil
                        }
                        return err
                } else {
                        // if labels of namespace contains the watchingLabels, 
the namespace should be set to controller.watchingNamespace
                        //if 
c.controller.watchingLabels.IsSubsetOf(namespace.Labels) {
                        c.controller.watchingNamespace.Store(namespace.Name, 
struct{}{})
                        //}
                }
        } else { // type == types.EventDelete
                namespace := ev.Tombstone.(*corev1.Namespace)
                if _, ok := 
c.controller.watchingNamespace.Load(namespace.Name); ok {
                        c.controller.watchingNamespace.Delete(namespace.Name)
                }
                // do nothing, if the namespace did not in 
controller.watchingNamespace
        }
   ```
   
   ### Environment
   
   * your apisix-ingress-controller version (output of 
`apisix-ingress-controller version --long`);
    v1.3
   * your Kubernetes cluster version (output of `kubectl version`);
   Server Version: version.Info{Major:"1", Minor:"18", GitVersion:"v1.18.14", 
GitCommit:"89182bdd065fbcaffefec691908a739d161efc03", GitTreeState:"clean", 
BuildDate:"2020-12-18T12:02:35Z", GoVersion:"go1.13.15", Compiler:"gc", 
Platform:"linux/amd64"}
   * if you run apisix-ingress-controller in Bare-metal environment, also show 
your OS version (`uname -a`).
   


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