mirror of https://github.com/k3d-io/k3d
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
26 lines
1.1 KiB
26 lines
1.1 KiB
# Creating multi-server clusters
|
|
|
|
!!! info "Important note"
|
|
For the best results (and less unexpected issues), choose 1, 3, 5, ... server nodes. (Read more on etcd quorum on [etcd.io](https://etcd.io/docs/v3.3/faq/#why-an-odd-number-of-cluster-members))
|
|
At least 2 cores and 4GiB of RAM are recommended.
|
|
|
|
## Embedded etcd
|
|
|
|
Create a cluster with 3 server nodes using k3s' embedded etcd database.
|
|
The first server 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 server nodes.
|
|
|
|
```bash
|
|
k3d cluster create multiserver --servers 3
|
|
```
|
|
|
|
## Adding server nodes to a running cluster
|
|
|
|
In theory (and also in practice in most cases), this is as easy as executing the following command:
|
|
|
|
```bash
|
|
k3d node create newserver --cluster multiserver --role server
|
|
```
|
|
|
|
!!! important "There's a trap!"
|
|
If your cluster was initially created with only a single server node, then this will fail.
|
|
That's because the initial server node was not started with the `--cluster-init` flag and thus is not using the etcd backend.
|
|
|