<p>/opt/kubernetes/bin/rke up --config /home/msh/rancher-cluster.yml</p>
<p>the rancher-cluser.yml file contains:</p>
<pre><code>nodes:
  - address: 192.168.10.34
    internal_address: 172.17.0.2
    user: bsh
    role: [controlplane,etcd]
  - address: 192.168.10.35
    internal_address: 172.17.0.3
    user: bsh
    role: [worker]
  - address: 192.168.10.36 
    internal_address: 172.17.0.4
    user: bsh
    role: [worker]
add_job_timeout: 120
</code></pre>
<p>Note: I have not configured any interface internal_address on any of the nodes. My understanding is that rancher/k8s will set these up for me . . . or something.</p>
<p>Here's the tail end of rke failing to start.</p>
<pre><code>INFO[0039] Removing container [rke-bundle-cert] on host [192.168.10.34], try #1 
INFO[0039] Image [rancher/rke-tools:v0.1.69] exists on host [192.168.10.34] 
INFO[0039] Starting container [rke-log-linker] on host [192.168.10.34], try #1 
INFO[0040] [etcd] Successfully started [rke-log-linker] container on host [192.168.10.34] 
INFO[0040] Removing container [rke-log-linker] on host [192.168.10.34], try #1 
INFO[0040] [remove/rke-log-linker] Successfully removed container on host [192.168.10.34] 
INFO[0040] [etcd] Successfully started etcd plane.. Checking etcd cluster health 
WARN[0055] [etcd] host [192.168.10.34] failed to check etcd health: failed to get /health for host [192.168.10.34]: Get https://172.17.0.2:2379/health: Unable to access the service on 172.17.0.2:2379. The service might be still starting up. Error: ssh: rejected: connect failed (Connection refused) 
FATA[0055] [etcd] Failed to bring up Etcd Plane: etcd cluster is unhealthy: hosts [192.168.10.34] failed to report healthy. Check etcd container logs on each host for more information 
</code></pre>
<p>Using: <br>
Rancher v2.5.2 <br>
rke version v1.0.16 <br>
docker-ce-19.03.14-3.el8.x86_64</p>

<p>From my understanding the interface configuration has to preexist. RKE will not take care of interface configurations.</p>
<p>Therefore either setup an internal subnet and assign your interfaces to it or use the external address also for the internal communication.</p>
