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I have a K8S cluster versioned 1.11.

I have calico installed as cni plugin. I need to replace it with flannel.

I found guides online how to migrate from flannel to calico but not the other way around.

Down any one have a tip/idea how to get by this?

Is it even possible migrating from Calico to flannel?

Thanks

eran meiri
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    Plus the kubernetes version is so old. Why waste time to migrate the CNI plugin which you can spend less time to start up a latest kubernetes cluster (1.17) in 15 minutes with another 5 minutes to set flannel ready. – BMW Feb 06 '20 at 02:03
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    Remember if you want to upgrade kuberentes later, you have to upgrade minor version only, so 1.11 has to be migrated to 1.12 first, then 1.13, until 1.17. I don't think you should go this route. – BMW Feb 06 '20 at 02:04
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    any why calico doesn't work for you, any special features you are looking for in flannel only? – BMW Feb 06 '20 at 02:05
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    We are using F5 - cni integration and for some reason it is not working properly with calico and flannel integration with F5 is smoothly – eran meiri Feb 16 '20 at 07:16

1 Answers1

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Migrating a cluster from Flannel to Calico is feasible but migration from Calico to Flannel is not supported.

This is mentioned in the documentation provided by Calico:

Rollback: Migration from Calico to flannel is not supported.

Will R.O.F.
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Devesh mehta
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