Rancher OS - A simplified Linux distribution built from containers, for containers

Presentation made for SurreyCodeCamp to orchestrate Docker with RancherOS a simplified Linux distribution built from containers, for containers.

1. Presentation by Pier Alberto Pierini for SurreyCodeCamp

2. Container OS

CoreOS

RancherOS

Snappy Ubuntu Core

RedHat Project Atomic

Mesosphere DCOS

Vmware Photon

Other....

3. VM vs. Docker

4. Why use RancherOS

Security

Not to dirty your OS

Install on VM or Bare Metal

OpenSource

Only 55 MB ISO install

Web GUI

Simplify development environments

6. OUR INSTALLATION
Virtualbox
A lot of patience

7. Virtualbox VM settings
Type: Linux
Version: Linux 2.6/3.x/4.x (64-bit)
Ram: 1 Gb or more
Create a Virtual hard drive
VDI
Dynamically allocated
HDD: 8 Gb or more, depend on your need
Network: Bridge

9. Change password to enter on the system
with ssh
$ sudo passwd rancher
insert the new password
generate ssh passkey on your system
(use Putty in Windows)
connect with ssh on the rancheros server
ssh [email protected]

10. Create a cloud-config.yml on the VM with vi:
$ sudo vi cloud-config.yml
ssh_authorized_keys:
- ssh-rsa AAA...
hostname: rancheros-cd01
rancher:
network:
dns:
nameservers:
- 8.8.8.8
- 8.8.4.4
interfaces:
eth*:
dhcp: false
eth0:
address: 192.168.1.50/24
gateway: 192.168.1.1
mtu: 1500
In "AAA..." Add your public SSH key

11. Install RancherOS on the HDD
$ sudo ros install -c cloud-config.yml -d /dev/sda
continue: Y
reboot: N
$ sudo shutdown -h now
detach the iso file to the VM
START the VM

12. Finalize the rancher server installation
connect to the machine in ssh
Install the RancherOS server
$ sudo docker run -d --restart=always -p 8080:8080 rancher/server
WEB browser connect to your RancherOS server
192.168.xxx.xxx:8080
add Host
Optional: Specify the public IP that should be used for this host.
Copy and paste the script reported on the bottom of the page in your host to
register the host with Rancher
Example:
sudo docker run --rm --privileged -v /var/run/docker.sock:/var/run/docker.sock -v
/var/lib/rancher:/var/lib/rancher rancher/agent:v1.2.5
http://192.168.1.136:8080/v1/scripts/E1EF77B89C91AB141E75:1483142400000:Y
WxolbacdhsNvgIyzqEk5NjPxXQ

14. Don’t forget to config an Admin with Password on
your new Rancher UI
Enjoy your Dockers
;)

15. References

https://github.com/rancher/os

http://rancher.com/rancher-os/

http://rancher.com/announcing-rancher-os/