kubernetes Traefik未绑定到节点主机上的端口80和443

qvtsj1bj  于 2023-02-07  发布在  Kubernetes
关注(0)|答案(1)|浏览(561)

我在AWS中使用K3 S v1.21.5+ k3 s1设置了一个双节点群集。我刚刚进行了默认安装，所以我将Traefik作为我的IngressController，它应该绑定到每个节点上的端口80和443。但是，检查netstat显示没有任何东西在侦听任何节点的这些端口，并且任何从浏览器连接到正在运行的Pod的尝试都失败了。
有趣的是，我尝试重新启动节点，看看是否可以解决问题（没有），我看到除了正常的svclb-traefik Daemonset之外，还创建了第二个Daemonset，名为svclb-traefik-######：

$ kubectl -n kube-system get ds
NAME                             DESIRED   CURRENT   READY   UP-TO-DATE   AVAILABLE   NODE SELECTOR   AGE
svclb-traefik                    2         2         2       2            2           <none>          21d
svclb-traefik-23fcfc42           2         2         0       2            0           <none>          8m45s

检查第二个Daemonset，我发现它试图启动的pod失败了，因为分配给它们的节点没有空闲端口。这是意料之中的，因为“真正的”svclb-traefik似乎已经绑定了它们（至少就kubernetes所知）。删除第二个svclb-traefik Daemonset并不能解决问题，Daemonset会在下次重新引导时返回。
我已经检查了traefik daemonset、traefik LoadBalancer Service和所有traefik pod，以了解可能出现的问题（kubectl describe的输出如下），但一切看起来都很正常。
恶魔：

$ kubectl -n kube-system describe ds svclb-traefik
Name:           svclb-traefik
Selector:       app=svclb-traefik
Node-Selector:  <none>
Labels:         objectset.rio.cattle.io/hash=f31475152fbf70655d3c016d368e90118938f6ea
                svccontroller.k3s.cattle.io/nodeselector=false
Annotations:    deprecated.daemonset.template.generation: 1
                objectset.rio.cattle.io/applied:
                  H4sIAAAAAAAA/8xUTW/jNhD9K8WcKUWy7EQW0MMiySFoNzFsby+BEVDkKGZNkQI5UmMY+u8FZWftbL6KbQ89ejjz/Oa90dvBRhkJBVxxrK1ZIAED3qg/0HllDRTAm8afdSkwqJG45M...
                objectset.rio.cattle.io/id: svccontroller
                objectset.rio.cattle.io/owner-gvk: /v1, Kind=Service
                objectset.rio.cattle.io/owner-name: traefik
                objectset.rio.cattle.io/owner-namespace: kube-system
Desired Number of Nodes Scheduled: 2
Current Number of Nodes Scheduled: 2
Number of Nodes Scheduled with Up-to-date Pods: 2
Number of Nodes Scheduled with Available Pods: 2
Number of Nodes Misscheduled: 0
Pods Status:  2 Running / 0 Waiting / 0 Succeeded / 0 Failed
Pod Template:
  Labels:  app=svclb-traefik
           svccontroller.k3s.cattle.io/svcname=traefik
  Containers:
   lb-port-80:
    Image:      rancher/klipper-lb:v0.2.0
    Port:       80/TCP
    Host Port:  80/TCP
    Environment:
      SRC_PORT:    80
      DEST_PROTO:  TCP
      DEST_PORT:   80
      DEST_IP:     10.43.82.221
    Mounts:        <none>
   lb-port-443:
    Image:      rancher/klipper-lb:v0.2.0
    Port:       443/TCP
    Host Port:  443/TCP
    Environment:
      SRC_PORT:    443
      DEST_PROTO:  TCP
      DEST_PORT:   443
      DEST_IP:     10.43.82.221
    Mounts:        <none>
  Volumes:         <none>
Events:
  Type    Reason            Age   From                  Message
  ----    ------            ----  ----                  -------
  Normal  SuccessfulCreate  36m   daemonset-controller  Created pod: svclb-traefik-pjffb

该处：

$ kubectl -n kube-system describe svc traefik
Name:                     traefik
Namespace:                kube-system
Labels:                   app.kubernetes.io/instance=traefik
                          app.kubernetes.io/managed-by=Helm
                          app.kubernetes.io/name=traefik
                          helm.sh/chart=traefik-9.18.2
Annotations:              meta.helm.sh/release-name: traefik
                          meta.helm.sh/release-namespace: kube-system
Selector:                 app.kubernetes.io/instance=traefik,app.kubernetes.io/name=traefik
Type:                     LoadBalancer
IP Family Policy:         SingleStack
IP Families:              IPv4
IP:                       10.43.82.221
IPs:                      10.43.82.221
LoadBalancer Ingress:     <node 1 IP>, <node 2 IP>
Port:                     web  80/TCP
TargetPort:               web/TCP
NodePort:                 web  30234/TCP
Endpoints:                10.42.1.116:8000
Port:                     websecure  443/TCP
TargetPort:               websecure/TCP
NodePort:                 websecure  32623/TCP
Endpoints:                10.42.1.116:8443
Session Affinity:         None
External Traffic Policy:  Cluster
Events:
  Type    Reason                Age   From                Message
  ----    ------                ----  ----                -------
  Normal  EnsuringLoadBalancer  16m   service-controller  Ensuring load balancer
  Normal  AppliedDaemonSet      16m   service-controller  Applied LoadBalancer DaemonSet kube-system/svclb-traefik-23fcfc42

其中一个“好”的pod（来自svclb-traefik）：

Name:         svclb-traefik-pjffb
Namespace:    kube-system
Priority:     0
Node:         <node 1>
Start Time:   Fri, 03 Feb 2023 08:25:09 -0500
Labels:       app=svclb-traefik
              controller-revision-hash=56b6bf6489
              pod-template-generation=1
              svccontroller.k3s.cattle.io/svcname=traefik
Annotations:  <none>
Status:       Running
IP:           10.42.1.96
IPs:
  IP:           10.42.1.96
Controlled By:  DaemonSet/svclb-traefik
Containers:
  lb-port-80:
    Container ID:   containerd://6ae25fd4dea39238f3d222dce1a25e3b01a7fb159cecd3e2684257e91dbfd4d7
    Image:          rancher/klipper-lb:v0.2.0
    Image ID:       docker.io/rancher/klipper-lb@sha256:5ea5f7904c404085ff24541a0e7a2267637af4bcf30fae9b747d871bfcd8a6f7
    Port:           80/TCP
    Host Port:      80/TCP
    State:          Running
      Started:      Fri, 03 Feb 2023 08:46:33 -0500
    Last State:     Terminated
      Reason:       Unknown
      Exit Code:    255
      Started:      Fri, 03 Feb 2023 08:25:10 -0500
      Finished:     Fri, 03 Feb 2023 08:46:05 -0500
    Ready:          True
    Restart Count:  1
    Environment:
      SRC_PORT:    80
      DEST_PROTO:  TCP
      DEST_PORT:   80
      DEST_IP:     10.43.82.221
    Mounts:
      /var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-72smb (ro)
  lb-port-443:
    Container ID:   containerd://b9ba3ec21cbd249f1e03d0f3230af9774ff7208ca56a5623a2b45b595a76889e
    Image:          rancher/klipper-lb:v0.2.0
    Image ID:       docker.io/rancher/klipper-lb@sha256:5ea5f7904c404085ff24541a0e7a2267637af4bcf30fae9b747d871bfcd8a6f7
    Port:           443/TCP
    Host Port:      443/TCP
    State:          Running
      Started:      Fri, 03 Feb 2023 08:46:33 -0500
    Last State:     Terminated
      Reason:       Unknown
      Exit Code:    255
      Started:      Fri, 03 Feb 2023 08:25:10 -0500
      Finished:     Fri, 03 Feb 2023 08:46:06 -0500
    Ready:          True
    Restart Count:  1
    Environment:
      SRC_PORT:    443
      DEST_PROTO:  TCP
      DEST_PORT:   443
      DEST_IP:     10.43.82.221
    Mounts:
      /var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-72smb (ro)
Conditions:
  Type              Status
  Initialized       True
  Ready             True
  ContainersReady   True
  PodScheduled      True
Volumes:
  kube-api-access-72smb:
    Type:                    Projected (a volume that contains injected data from multiple sources)
    TokenExpirationSeconds:  3607
    ConfigMapName:           kube-root-ca.crt
    ConfigMapOptional:       <nil>
    DownwardAPI:             true
QoS Class:                   BestEffort
Node-Selectors:              <none>
Tolerations:                 CriticalAddonsOnly op=Exists
                             node-role.kubernetes.io/control-plane:NoSchedule op=Exists
                             node-role.kubernetes.io/master:NoSchedule op=Exists
                             node.kubernetes.io/disk-pressure:NoSchedule op=Exists
                             node.kubernetes.io/memory-pressure:NoSchedule op=Exists
                             node.kubernetes.io/not-ready:NoExecute op=Exists
                             node.kubernetes.io/pid-pressure:NoSchedule op=Exists
                             node.kubernetes.io/unreachable:NoExecute op=Exists
                             node.kubernetes.io/unschedulable:NoSchedule op=Exists
Events:
  Type    Reason          Age   From               Message
  ----    ------          ----  ----               -------
  Normal  Created         17m   kubelet            Created container lb-port-80
  Normal  Started         17m   kubelet            Started container lb-port-80
  Normal  Created         17m   kubelet            Created container lb-port-443
  Normal  Started         17m   kubelet            Started container lb-port-443

其中一个“坏”pod（来自svclb-traefik-XXXXX Daemonset）：

Name:           svclb-traefik-23fcfc42-t6jx7
Namespace:      kube-system
Priority:       0
Node:           <none>
Labels:         app=svclb-traefik-23fcfc42
                controller-revision-hash=74f5f855c9
                pod-template-generation=1
                svccontroller.k3s.cattle.io/svcname=traefik
                svccontroller.k3s.cattle.io/svcnamespace=kube-system
Annotations:    <none>
Status:         Pending
IP:
IPs:            <none>
Controlled By:  DaemonSet/svclb-traefik-23fcfc42
Containers:
  lb-tcp-80:
    Image:      rancher/klipper-lb:v0.4.0
    Port:       80/TCP
    Host Port:  80/TCP
    Environment:
      SRC_PORT:    80
      SRC_RANGES:  0.0.0.0/0
      DEST_PROTO:  TCP
      DEST_PORT:   80
      DEST_IPS:    10.43.82.221
    Mounts:        <none>
  lb-tcp-443:
    Image:      rancher/klipper-lb:v0.4.0
    Port:       443/TCP
    Host Port:  443/TCP
    Environment:
      SRC_PORT:    443
      SRC_RANGES:  0.0.0.0/0
      DEST_PROTO:  TCP
      DEST_PORT:   443
      DEST_IPS:    10.43.82.221
    Mounts:        <none>
Conditions:
  Type           Status
  PodScheduled   False
Volumes:         <none>
QoS Class:       BestEffort
Node-Selectors:  <none>
Tolerations:     CriticalAddonsOnly op=Exists
                 node-role.kubernetes.io/control-plane:NoSchedule op=Exists
                 node-role.kubernetes.io/master:NoSchedule op=Exists
                 node.kubernetes.io/disk-pressure:NoSchedule op=Exists
                 node.kubernetes.io/memory-pressure:NoSchedule op=Exists
                 node.kubernetes.io/not-ready:NoExecute op=Exists
                 node.kubernetes.io/pid-pressure:NoSchedule op=Exists
                 node.kubernetes.io/unreachable:NoExecute op=Exists
                 node.kubernetes.io/unschedulable:NoSchedule op=Exists
Events:
  Type     Reason            Age   From               Message
  ----     ------            ----  ----               -------
  Warning  FailedScheduling  19m   default-scheduler  0/2 nodes are available: 1 node(s) didn't have free ports for the requested pod ports. preemption: 0/2 nodes are available: 2 No preemption victims found for incoming pod.
  Warning  FailedScheduling  19m   default-scheduler  0/2 nodes are available: 1 node(s) didn't have free ports for the requested pod ports. preemption: 0/2 nodes are available: 2 No preemption victims found for incoming pod.
kubernetes

1条答案

按热度按时间
8aqjt8rx

8aqjt8rx1#

这个答案非常不令人满意，但我最终删除了“真实的的”svclb-traefik和svclb-traefik-XXXXX守护进程并重新启动节点。在启动时，两个守护进程都被重新创建（-XXXXX守护进程仍然无法启动它的pod），但我至少可以从浏览器连接到我的pod。如果问题再次出现，我会更新这个答案。

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