我有一个kubernetes集群，有一个主节点和四个节点。 kube-proxy在所有四个节点上运行良好，我可以在任何节点上访问服务，而不管它在哪里运行;即。 http://node1:30000到http://node4:30000也给出了相同的回复。
通过运行 shutdown -r now 重新启动node4后，它恢复了，但我注意到该节点不再响应请求。我正在运行以下命令：
curl http://node4:30000
如果我从我的PC或集群中的任何其他节点运行它 - node1到node3，或者master - 我得到：
curl: (7) Failed to connect to node4 port 30000: Connection timed out
但是，如果我从node4运行它，它会成功响应。这让我相信kube-proxy运行正常，但有些东西阻止了外部连接。
当我运行 kubectl describe node node4 时，我的输出看起来很正常：
Name: node4
Labels: beta.kubernetes.io/arch=amd64
beta.kubernetes.io/os=linux
kubernetes.io/hostname=node4
Taints: <none>
CreationTimestamp: Tue, 21 Feb 2017 15:21:17 -0400
Phase:
Conditions:
Type Status LastHeartbeatTime LastTransitionTime Reason Message
---- ------ ----------------- ------------------ ------ -------
OutOfDisk False Wed, 22 Feb 2017 08:03:40 -0400 Tue, 21 Feb 2017 15:21:18 -0400 KubeletHasSufficientDisk kubelet has sufficient disk space available
MemoryPressure False Wed, 22 Feb 2017 08:03:40 -0400 Tue, 21 Feb 2017 15:21:18 -0400 KubeletHasSufficientMemory kubelet has sufficient memory available
DiskPressure False Wed, 22 Feb 2017 08:03:40 -0400 Tue, 21 Feb 2017 15:21:18 -0400 KubeletHasNoDiskPressure kubelet has no disk pressure
Ready True Wed, 22 Feb 2017 08:03:40 -0400 Tue, 21 Feb 2017 15:21:28 -0400 KubeletReady kubelet is posting ready status. AppArmor enabled
Addresses: 10.6.81.64,10.6.81.64,node4
Capacity:
alpha.kubernetes.io/nvidia-gpu: 0
cpu: 2
memory: 4028748Ki
pods: 110
Allocatable:
alpha.kubernetes.io/nvidia-gpu: 0
cpu: 2
memory: 4028748Ki
pods: 110
System Info:
Machine ID: dbc0bb6ba10acae66b1061f958220ade
System UUID: 4229186F-AA5C-59CE-E5A2-258C1BBE9D2C
Boot ID: a3968e6c-eba3-498c-957f-f29283af1cff
Kernel Version: 4.4.0-63-generic
OS Image: Ubuntu 16.04.1 LTS
Operating System: linux
Architecture: amd64
Container Runtime Version: docker://1.13.0
Kubelet Version: v1.5.2
Kube-Proxy Version: v1.5.2
ExternalID: node4
Non-terminated Pods: (27 in total)
Namespace Name CPU Requests CPU Limits Memory Requests Memory Limits
--------- ---- ------------ ---------- --------------- -------------
<< application pods listed here >>
kube-system kube-proxy-0p3lj 0 (0%) 0 (0%) 0 (0%) 0 (0%)
kube-system weave-net-uqmr1 20m (1%) 0 (0%) 0 (0%) 0 (0%)
Allocated resources:
(Total limits may be over 100 percent, i.e., overcommitted.
CPU Requests CPU Limits Memory Requests Memory Limits
------------ ---------- --------------- -------------
20m (1%) 0 (0%) 0 (0%) 0 (0%)
在系统重启后，是否需要做一些具体的事情才能使节点重新上线？