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I installed flannel as a CNI for my Kubernetes cluster. Now I want to add a network policy to my cluster. After searching I find Canal (Calico for policy and flannel for networking).

How I can migrate from flannel to canal? Or is there any way to install Calico network policy alongside current flannel installation?

Thanks

Wytrzymały Wiktor
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nader
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1 Answers1

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Canal is just a another name for flannel, so there is no way to migrate, but there is a way to migrate from flannel/Canal to Calico as described here.

To install Calico for policy and flannel (aka Canal) for networking, please have a look here.

Jakub Siemaszko
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  • Hello @nader and welcome to ServerFault! Please remember to [react to answers for your questions](https://stackoverflow.com/help/someone-answers). That way we know if the answers were helpful and other community members could also benefit from them. Try to [accept answer](https://stackoverflow.com/help/accepted-answer) that is the final solution for your issue, upvote answers that are helpful and comment on those which could be improved or require additional attention. Enjoy your stay! – Wytrzymały Wiktor Jul 05 '21 at 11:16
  • Hello @WytrzymałyWiktor and thank you for your advice. I read the link mentioned in the answer but before I install the Canal, I need to remove the flannel. How I can remove it? and what happens to my running pods if I remove the flannel then install Canal? – nader Jul 05 '21 at 15:40
  • To remove Flannel from the cluster usually it's enough to run kubectl delete -f and reboot all nodes to get rid of any interfaces created by Flannel. You may need to rejoin worker nodes to the cluster after that. – Jakub Siemaszko Jul 13 '21 at 09:13