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I do not want to use

/var/lib/longhorn

on CP/etcd nodes so I will have to find a way to do that (if that's how it works)

No, longhorn will only send replicas on scheduleable nodes

thanks

1. Longhorn will deploy all components on a node when the node does not contain role

worker

2. For worker nodes that run Longhorn components, Longhorn by default store all replicas data in dir

/var/lib/longhorn

. It there is no replica on the node, or all replicas on the node has no data, there won't be too many things

/var/lib/longhorn

3. If you are really mind using

/var/lib/longhorn

, you can change it via multiple ways: Manually re-creating disk/data-path for some nodes, or changing the default value at the Longhorn installation stage https://longhorn.io/docs/1.7.1/nodes-and-volumes/nodes/default-disk-and-node-config/