Continental Innovates with Rancher and Kubernetes
I’m Sidhartha Mani, one of the engineers at Rancher, and I wanted to
provide a quick overview for how to get started using RancherOS.
RancherOS is a micro-linux distribution that has the aim of providing
just the right amount of OS to run Docker. It turns out, all Docker
really requires to function is the kernel. RancherOS embraces this by
running Docker as PID1 and everything running inside of it is a
container. At about 22MB, the OS is easy to distribute, orchestrate and
spin up in your data center. You can learn more about RancherOS on our
In this blog, I will walk through spinning up RancherOS on virtualbox
using Docker machine. This is the easiest way to get RancherOS up and
Go to your console, and use this command
docker-machine create -d virtualbox --virtualbox-boot2docker-url $RANCHEROS-ISO-URL $MACHINE-NAME
Note that, For the v0.3.3 release of RancherOS, the value for
MACHINE-NAME is the name that you would like to call your machine.
That’s it. You have a RancherOS host running on virtualbox now. You can
verify that you have a VirtualBox VM running on your host using this
command VBoxManage list runningvms | grep $MACHINE-NAME It should
print out the newly crated machine. If not, something went wrong with
the provisioning step.
VBoxManage list runningvms | grep $MACHINE-NAME
Logging into RancherOS follows the standard docker-machine way. Use this
command to login into your newly provisioned RancherOS VM.
docker-machine ssh $MACHINE-NAME This will log you into the RancherOS
VM. You’ll then be able to explore the OS, run commands, spin up
containers etc. Once you’ve finished exploring, exit by pressing
docker-machine ssh $MACHINE-NAME
You can point the docker client on your host to the docker daemon
running inside of the VM. That way, you can run your docker commands
like you had installed docker on your host. To point your docker client
to the daemon inside the VM, use this command
eval $(docker-machine env $MACHINE-NAME) You can run any docker
commmand like you would normally, and it will execute your command in
the RancherOS VM.
eval $(docker-machine env $MACHINE-NAME)
docker run -p 80:80 -p 443:443 -d nginx This will startup nginx on
your VM. In order to access it, you need the ip address of the VM.
docker-machine ip $MACHINE-NAME If you copy the IP address printed
from the above command and paste it in your browser, you should see a
Welcome Page for nginx!
docker run -p 80:80 -p 443:443 -d nginx
docker-machine ip $MACHINE-NAME
The above information should help you get started with RancherOS.
If you’re interested in learning more about RancherOS, or our
management and infrastructure platform Rancher, please join us for one of our
upcoming online meetups. Sidhartha Mani
is an engineer at Rancher Labs, you can follow him on