K3s: Possibility of dynamic change between single node and multi-nodes cluster

Created on 29 Jan 2020  路  2Comments  路  Source: k3s-io/k3s

Hi,

I have a question regarding the number of nodes for K3s.Can I start K3s as a single node cluster and later add nodes to dynamically and make it multi-host (one master and 2 workers for example)? Or I need to tear down the single node cluster and set it up again as a multi-node?

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As far as I can tell, you should be able to add additional servers (masters) at any time later if you start the first with --init-cluster to use dqlite, or with an external datastore. The default sqlite datastore is single-master only.

Regardless of whether you have multiple masters, you can always add more agent (worker) nodes at any time.

brandond picture brandond on 29 Jan 2020
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Also keep in mind dqlite uses the raft algorithm and so you should have 1 or 3 or 5 (for example) masters.
Please let us know if there are any further questions.

davidnuzik picture davidnuzik on 5 Feb 2020
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