#cloud-config

http://showanimaciones.com/appcontainers-coreos-installer/ ANIMACIONES PARA CUMPLEAÑOS EN: showanimaciones.com Download the TinyCoreOS Installer: http://www.appcontainers.com/downloads/appcontainers-tinycoreosinstaller/

Full Text Tutorial on the steps performed in this video: http://www.appcontainers.com/lightweight-coreos-bootable-in…

I'm writing these CoreOS tutorials to document & share my experience with the platform.  In my initial dealings with Docker & CoreOS I have found the CoreOS docs to be very minimal & unsatisfactory especially for new users.

Prep for the install

These instructions show how to perform CoreOS install using the .iso method.

Download the CoreOS .iso

Get familiar with the cloud-config.yaml example file & gather all the values for the < your xxxx> tags within the file ( your going to need them later)

Create a bootable CoreOS USB key or burn a CD using the .iso file

Create your own personal SSH Keys (you'll nee the contents of the id_rsa.pub file) 

Make sure you have an active internet connection

Now we're ready for some boot action

Install CoreOS

These directions show how to install CoreOS to a disk

Boot to CoreOS using the bootable USB Key or CD until you see the $ core@localhost~$ prompt

Download the cloud-config.yaml template I mentioned above:      $ wget -O cloud-config.yaml http://bit.ly/1o2J9vA

Get the Network Interface name:     $ ifconfig - the nic name should be something like en... or ens...

Use the VIM text editor to modify the cloud-config.yaml file we just downloaded.    $ vim cloud-config.yaml

Replace all the < your ... > tags with values pertinent to your installation, values such as Hostname, IP Address, Gateway, Public SSH Keys etc...

Save the file with your changes.

Now we'll install CoreOS using the core-install script:     $ sudo coreos-install -d /dev/sda -C stable -c ~/cloud-config.yaml

After a successful installation reboot the server & remove the boot media

Reboot a second time for the new settings to take place

Assign Sudo Access to the cloud-config.yaml users

Unfortunately you have to manually add users to the sudoers file in order to assign root privileges.

 Login into the new server via SSH:     $ ssh core@<your ip address>

$ sudo -i      to get root access

Create a new sudo rule & give the user(s) sudo access (replace the < ..> with your user's name:     $ echo "< your user's name > ALL=(ALL) NOPASSWD: ALL" > /etc/sudoers.d/< your user's name >

Reboot the server

Login to the server via ssh using your new user & test your sudo access

CoreOS is a very cool tool but still lacking in documentation which is usually the case with cutting edge technologies.  I'll be writing a followup blog that will discuss CoreOS & using docker to create new application containers.

Props to Stevie Holdway's blog which served we well in writing this. It's also a great resource.

Stay tuned