Running your containers in sane environment, Project Atomic, and associated tools.

1. Running your containers in a sane environment,
Project Atomic
Aditya Patawari
Contributor to Fedora Admin team
Lead Engineer (Infrastructure) at BrowserStack.com
aditya@adityapatawari.com
adimania on freenode irc
http://blog.adityapatawari.com
April 21, 2015
Aditya Patawari Running your containers in a sane environment, Project Atomic

2. Topics
What is Docker?
Why not LXC or VM?
Project Atomic is here!
.. Along with some components
Starting our Atomic Host
Docker Commands
Docker Repository
Aditya Patawari Running your containers in a sane environment, Project Atomic

3. What is the problem?
We need a stable environment to run containers
We need to support automation
Managing hosts should involve minimal efforts
Aditya Patawari Running your containers in a sane environment, Project Atomic

4. Project Atomic is here!
Minimal operating system
Benefits of our favorite Enterprise Linux
Robust atomic upgrades and systemd
Ready to take on cloud, virtualized or bare metal
Aditya Patawari Running your containers in a sane environment, Project Atomic

5. .. including rpm-ostree ..
Bootable, immutable, versioned filesystem trees
Composed from standard rpms
Atomic upgrade and rollbacks
Only /etc and /var are writable
Aditya Patawari Running your containers in a sane environment, Project Atomic

6. .. and Systemd ..
System and service manager for Linux
Replacing the init in Centos 7
Highly modular and much more powerful than sysV
Check out http://0pointer.de/blog/projects/why.html
Aditya Patawari Running your containers in a sane environment, Project Atomic

7. .. also Introducing Cockpit..
Aditya Patawari Running your containers in a sane environment, Project Atomic

8. .. and lastly Kubernetes ..
Master-slave arch
Boot new containers
Scalable and fault tolerant
Lots of examples and setup instructions at
https://github.com/GoogleCloudPlatform/kubernetes
Aditya Patawari Running your containers in a sane environment, Project Atomic

9. Starting Atomic Host
Atomic host needs cloud-init data
Info about the host, i.e. meta-data
Info about the user, i.e. user-data
Aditya Patawari Running your containers in a sane environment, Project Atomic

10. cloud-init data
$ cat meta-data
instance-id: iid-local01;
local-hostname: myhost;
$ cat user-data
#cloud-config
password: mypassword
ssh_pwauth: True
chpasswd: { expire: False }
ssh_authorized_keys:
- ssh-rsa ... foo@foo.com
$ genisoimage -output init.iso -volid cidata -joliet
-rock user-data meta-data
Aditya Patawari Running your containers in a sane environment, Project Atomic

11. Demo!
Start a container.
Verify that it works.
Kill the container.
OOOOO... Magic!
Aditya Patawari Running your containers in a sane environment, Project Atomic

12. Questions?
Now is your chance :)
Aditya Patawari Running your containers in a sane environment, Project Atomic