Possibility to install cluster without CNI

[ehsan310]

What would you like to be added

I would like to install and push cluster without a default CNI and not using Kubespray to install the CNI plugin.
I have tried to use cni-plugins but that will not help in case I want to install CNI like Calico which manages dynamic IPAM.
The reason for cni-plugins not working was during cluster initialization there is --pod-cidr which I don't want to pass any static ip range

Why is this needed

To be able to install custom cni or another way of installing the CNI like operator based installation for Calico

[yankay]

HI @ehsan310

I'm not very sure, using kube_network_plugin: cni may solution the issue :-)

[poblahblahblah]

We do the same thing since we have another mechanism to handle CNI management outside of kubespray.

To do this we set kube_network_plugin: cni as @yankay suggested.

[ehsan310]

Ok!
I thought of trying this but was afraid of —pod-cidr flag actually that is only ignored when calico is chosen as CNI
Maybe not really a problem!? Will try it on my lab.

do you think it is safe to change it on a running cluster?

[yankay]

Ok! I thought of trying this but was afraid of —pod-cidr flag actually that is only ignored when calico is chosen as CNI Maybe not really a problem!? Will try it on my lab.

do you think it is safe to change it on a running cluster?

Changing the CNI is not a safe action on a running cluster :-)

[ehsan310]

In case i change cni plugin from calico to cni , do kubespray remove anything?

i have checked cni role and as far as I understood it just create folders unless some other thing is changed somewhere else.

i have to change my running cluster to calico operator based installation .