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958 B
25 lines
958 B
# Creating multi-master clusters
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!!! info "Important note"
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For the best results (and less unexpected issues), choose 1, 3, 5, ... master nodes.
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## Embedded dqlite
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Create a cluster with 3 master nodes using k3s' embedded dqlite database.
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The first master to be created will use the `--cluster-init` flag and k3d will wait for it to be up and running before creating (and connecting) the other master nodes.
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```bash
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k3d cluster create multimaster --masters 3
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```
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## Adding master nodes to a running cluster
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In theory (and also in practice in most cases), this is as easy as executing the following command:
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```bash
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k3d node create newmaster --cluster multimaster --role master
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```
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!!! important "There's a trap!"
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If your cluster was initially created with only a single master node, then this will fail.
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That's because the initial master node was not started with the `--cluster-init` flag and thus is not using the dqlite backend.
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