Note
Because I was using _libvirt_, I was able to do `virsh console
` and run these commands.
## Virsh Console {#virsh-console}
If you are running these VMs on _libvirt_, then you can console into the box and run `vi`.
```text
# virsh list
Id Name State
-------------------------
21 kube01 running
22 kube02 running
23 kube03 running
24 rancher running
# virsh console rancher
```
## Configuration {#configuration}
If you read the _RancherOS_ [documentation](https://rancher.com/docs/os/v1.x/en/), you'll find out that you can configure the _OS_ with a `YAML` configuration file so let's do that.
```text
$ vi cloud-config.yml
```
And that file should hold.
```yaml
---
hostname: rancher.kube.loco
ssh_authorized_keys:
- ssh-rsa AAA...
rancher:
network:
interfaces:
eth0:
address: 192.168.122.5/24
dhcp: false
gateway: 192.168.122.1
mtu: 1500
```
Make sure that your **public** _ssh key_ is replaced in the example before and if you have a different network configuration for your VMs, change the network configuration here.
After you save that file, install the _OS_.
```text
$ sudo ros install -c cloud-config.yml -d /dev/sda
```
Do the same for the rest of the servers and their names and IPs should be as follows (if you are following this tutorial):
```text
192.168.122.5 rancher.kube.loco
192.168.122.10 kube01.kube.loco
192.168.122.11 kube02.kube.loco
192.168.122.12 kube03.kube.loco
```
## Post Installation Configuration {#post-installation-configuration}
After _RancherOS_ has been installed, one will need to configure `/etc/hosts` and it should look like the following if one is working off of the _Rancher_ box.
```text
$ sudo vi /etc/hosts
```
```text
127.0.0.1 rancher.kube.loco
192.168.122.5 rancher.kube.loco
192.168.122.10 kube01.kube.loco
192.168.122.11 kube02.kube.loco
192.168.122.12 kube03.kube.loco
```
Do the same on the rest of the servers while changing the `127.0.0.1` hostname to the host of the server.
## Installing Rancher {#installing-rancher}
At this point, I have to stress a few facts:
- This is not the Rancher recommended way to deploy _kubernetes_.
- The recommended way is of course [RKE](https://rancher.com/docs/rke/v0.1.x/en/).
- This is for testing, so I did not take into consideration backup of anything.
- There are ways to backup Rancher configuration by mounting storage from the `rancher` docker container.
If those points are understood, let's go ahead and deploy Rancher.
First, `$ ssh rancher@192.168.122.5` then:
```text
[rancher@rancher ~]$ docker run -d --restart=unless-stopped -p 80:80 -p 443:443 rancher/rancher
```
Give it a few minutes for the container to come up and the application as well. Meanwhile configure your `/etc/hosts` file on your machine.
```text
192.168.122.5 rancher.kube.loco
```
Now that all that is out of the way, you can login to