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1、报错如下

I0529 01:47:12.679312       1 event.go:307] "Event occurred" object="k8s-node-1" fieldPath="" kind="Node" apiVersion="v1" type="Normal" reason="CIDRNotAvailable" message="Node k8s-node-1 status is now: CIDRNotAvailable"
E0529 01:48:44.516760       1 controller_utils.go:262] Error while processing Node Add/Delete: failed to allocate cidr from cluster cidr at idx:0: CIDR allocation failed; there are no remaining CIDRs left to allocate in the accepted range
I0529 01:48:44.516885       1 event.go:307] "Event occurred" object="k8s-master" fieldPath="" kind="Node" apiVersion="v1" type="Normal" reason="CIDRNotAvailable" message="Node k8s-master status is now: CIDRNotAvailable"
E0529 01:49:28.020461       1 controller_utils.go:262] Error while processing Node Add/Delete: failed to allocate cidr from cluster cidr at idx:0: CIDR allocation failed; there are no remaining CIDRs left to allocate in the accepted range
I0529 01:49:28.020839       1 event.go:307] "Event occurred" object="k8s-node-2" fieldPath="" kind="Node" apiVersion="v1" type="Normal" reason="CIDRNotAvailable" message="Node k8s-node-2 status is now: CIDRNotAvailable"

2、可能原因k8s初始化cluster-cidr和service-cluster-ip-range子网划分冲突

（原    --apiserver-advertise-address 10.192.30.20  --service-cidr 10.245.0.0/12    --pod-network-cidr 10.244.0.0/16）

3、修改/etc/kubernetes/manifests/kube-controller-manager.yaml

- --cluster-cidr=10.96.0.0/16                #修改此处

修改后不用重启组件或者集群，稍等后pod自动重建

 kubectl logs  kube-controller-manager-k8s-master  -n kube-system查看没有报错

（未修改之前，即使pod运行正常，查看pod日志还是有上述报错）

4、修改后没有发现问题，请大家在测试环境测试。