At almost the same time, I had another node entered the same situation, the
log of kubelet:
$ systemctl status kubelet
* kubelet.service - Kubernetes Kubelet
Loaded: loaded (/etc/systemd/system/kubelet.service; enabled; vendor
preset: enabled)
Active: active (running) since Wed 2017-11-29 16:04:21 CST; 1 months 4
days ago
Docs: https://github.com/kubernetes/kubernetes
Main PID: 22966 (kubelet)
Tasks: 75
Memory: 364.2M
CPU: 1w 3h 13min 2.144s
CGroup: /system.slice/kubelet.service
|-22966 /kubelet --address=0.0.0.0 --allow-privileged=true
--cluster-dns=192.168.192.10 --cluster-domain=cluster.local --
cloud-provider= --port=10250 --lock-file=/var/run/lock/kubelet.lock
--exit-on-lock-contention --node-labels=worker=true --pod-manife
st-path=/etc/kubernetes/manifests
--kubeconfig=/etc/kubernetes/kubeconfig.yaml --require-kubeconfig=true
--network-plugin=cni --cni-
conf-dir=/etc/cni/net.d --cni-bin-dir=/opt/cni/bin --logtostderr=true
`-23109 journalctl -k -f
Jan 02 10:31:41 ae02.pek.prod.com kubelet-wrapper[22966]: fatal error:
runtime·unlock: lock count
Jan 02 10:31:41 ae02.pek.prod.com kubelet-wrapper[22966]: fatal error:
runtime·unlock: lock count
Jan 02 10:31:41 ae02.pek.prod.com kubelet-wrapper[22966]: fatal error:
runtime·unlock: lock count
Jan 02 10:31:41 ae02.pek.prod.com kubelet-wrapper[22966]: fatal error:
runtime·unlock: lock count
Jan 02 10:31:41 ae02.pek.prod.com kubelet-wrapper[22966]: fatal error:
runtime·unlock: lock count
Jan 02 10:31:41 ae02.pek.prod.com kubelet-wrapper[22966]: fatal error:
runtime·unlock: lock count
Jan 02 10:31:41 ae02.pek.prod.com kubelet-wrapper[22966]: fatal error:
runtime·unlock: lock count
Jan 02 10:31:41 ae02.pek.prod.com kubelet-wrapper[22966]: fatal error:
runtime·unlock: lock count
Jan 02 10:31:41 ae02.pek.prod.com kubelet-wrapper[22966]: fatal error:
runtime·unlock: lock count
10255 port wasn't response, and strace hung here:
# strace -p 22966
Process 22966 attached
read(25, ^CProcess 22966 detached
<detached ...>
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