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部署flannel时出现的问题

在部署flannel网络插件时,发现flannel一直处于crashloopbackoff状态:

[root@fv120-100 manifest]# kubectl get pods -n kube-system
NAME READY STATUS RESTARTS AGE
kube-flannel-ds-2xsqv 0/1 CrashLoopBackOff 5 5m13s
kube-flannel-ds-p7j2d 0/1 CrashLoopBackOff 5 5m13s

查看相关日志:

 kubectl logs kube-flannel-ds-2xsqv -n kube-system

E0515 02:10:20.838517 1 main.go:293] Error registering network: failed to acquire lease: node "172.16.120.101" pod cidr not assigned
I0515 02:10:20.838711 1 main.go:372] Stopping shutdownHandler...

意思是说注册网络时,pod 的cidr没有分配;

修改kube-controller-manager的配置参数:

增加如下参数解决

--allocate-node-cidrs=true

重启systemctl restart kube-controller-manager.service

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