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Flannel out of subnets #650

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zengshaoyong opened this issue Mar 22, 2023 · 1 comment

zengshaoyong commented Mar 22, 2023

文档版本
K8S 版本:v1.12。

现象描述
你好，遇到一个flannel的报错问题，希望大神帮忙解答，谢谢

我按照教程设置Network:172.30.0.0/16，SubnetLen:21，目前集群有31个节点，当新增第32个节点时，flannel服务报错：Error registering network：failed to acquire lease：out of subnets

Author

zengshaoyong commented Mar 22, 2023

我在这里找到了答案，但是我在生产环境，请问有没有一种平滑过渡的方案呢

kubeleti里面设置的maxPods的值是: 220，每台机器最多只能跑220个容器，一个c段ip就足够了

SubnetLen值为21， CLUSTER_CIDR是172.30.0.0/16，这样集群中有32个node就把地址池用完了

应该设置SubnetLen为24, 这样ip地址段足够分配给node上的容器，也能充分利用ip地址，集群中可以容纳256个节点

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