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Introduction to Project Atomic
Lalatendu Mohanty
@lalatenduM,
lalatenduM on Freenode,
lala@redhat.com
Topics
●
What is Project Atomic?
●
Rpm-ostree
●
Cockpit
●
Kubernets
●
/usr/bin/atomic
●
Docker
●
SPC
●
Nulecule
●
CentOS A...
What is Project Atomic?
To Begin With
●
It is not a new GNU/Linux distribution.
●
Framework to create an OS from RHEL,
CentOS and Fedora.
●
Aim of...
Why Atomic?
●
For running containers we don't need a full
fledged distribution.
●
Optimized OS for running and maintaining...
Why Atomic?
●
Maintaining these systems should be
relatively less painful.
●
Updating the system should be easy to deploy
...
What Atomic Hosts Won't Provide
●
YUM install will not work inside Atomic host
●
Official images would have minimal packag...
Atomic hosts comprises of
●
Rpm-ostree
●
Cockpit
●
Kubernets
●
/usr/bin/atomic
●
Docker
●
SPC
rpm-ostree
OSTree
“OSTree was born to help implement a continuous
delivery model for operating systems. One can be a lot
more confide...
rpm-ostree
●
Git for operating systems.
●
Update methods of containers and applied
them to operating system.
●
No more hal...
Why rpm-ostree?
●
Atomic host would only run containers.
●
Atomic update makes more sense for an
immutable system.
●
Allow...
How rpm-ostree works?
●
Fiilesystem is read-only except /var and /etc
●
All data (e.g. containers) are unchanged on
upgrad...
Docker
●
Built-in Docker run time in Atomic host.
●
Docker run would just work.
– $docker run -t -i fedora /bin/bash
Kubernetes
●
An open source system for managing
containerized applications across multiple
hosts
●
It gives basic mechanis...
Nulecule
●
Provide a simple, flexible way to describe a
multi-container application, including all
dependencies.
https://g...
Cockpit
●
Server manager for administrating Linux
servers via web browser.
●
Designed to be multi-server
●
Support for man...
/usr/bin/atomic
●
Coherent entry point : manage host and
containers with the atomic command.
●
Fill gaps in Linux containe...
SPC
●
SPC = Super Privileged Containers
●
Tools container
●
Allows applications inside of containers to
interact with or c...
Special interest groups (SIGs)
●
For building specialized variants of CentOS that fulfill
specific sets of requirements.
●...
CentOS Atomic SIG
●
To deliver CentOS based Atomic host.
●
Also building a downstream of RHEL Atomic
host.
●
http://wiki.c...
References
●
Introduction to Atomic - Joe Brockmeier -
https://www.youtube.com/watch?v=cPltG4Yd
KVE
●
https://github.com/G...
Get involved
●
Website: projectatomic.io
●
Github: github.com/projectatomic
●
#atomic on Freenode
●
centos-devel, atomic-d...
Thank you :-)
Any questions please?
Introduction to Project atomic (CentOS Dojo Bangalore)
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Introduction to Project atomic (CentOS Dojo Bangalore)

The talk was given in CentOS Dojo Bangalore on 29th April 2015
http://wiki.centos.org/Events/Dojo/Bangalore2015

This slides contains introduction to Project Atomic and CentOS Atomic SIG.

Introduction to Project atomic (CentOS Dojo Bangalore)

  1. 1. Introduction to Project Atomic Lalatendu Mohanty @lalatenduM, lalatenduM on Freenode, lala@redhat.com
  2. 2. Topics ● What is Project Atomic? ● Rpm-ostree ● Cockpit ● Kubernets ● /usr/bin/atomic ● Docker ● SPC ● Nulecule ● CentOS Atomic SIG ● Getting Involved
  3. 3. What is Project Atomic?
  4. 4. To Begin With ● It is not a new GNU/Linux distribution. ● Framework to create an OS from RHEL, CentOS and Fedora. ● Aim of Project Atomic is to create a better OS for containers.
  5. 5. Why Atomic? ● For running containers we don't need a full fledged distribution. ● Optimized OS for running and maintaining containers. ● Less number of packages to maintain.
  6. 6. Why Atomic? ● Maintaining these systems should be relatively less painful. ● Updating the system should be easy to deploy and manage. ● More secure than the traditional OS
  7. 7. What Atomic Hosts Won't Provide ● YUM install will not work inside Atomic host ● Official images would have minimal package set.
  8. 8. Atomic hosts comprises of ● Rpm-ostree ● Cockpit ● Kubernets ● /usr/bin/atomic ● Docker ● SPC
  9. 9. rpm-ostree
  10. 10. OSTree “OSTree was born to help implement a continuous delivery model for operating systems. One can be a lot more confident in updating systems if one knows that a reliable rollback system is always available.” COLIN WALTERS Senior Software Engineer, Inventor of OSTree Red Hat
  11. 11. rpm-ostree ● Git for operating systems. ● Update methods of containers and applied them to operating system. ● No more half way upgraded systems # yum update bash: yum: command not found # atomic host upgrade Upgrade prepared for next boot # atomic host rollback Successfully reset deployment
  12. 12. Why rpm-ostree? ● Atomic host would only run containers. ● Atomic update makes more sense for an immutable system. ● Allows reuse of RPMs. ● No need to re-invent wheel on packaging. ● Option to rollback to previous state (old good state).
  13. 13. How rpm-ostree works? ● Fiilesystem is read-only except /var and /etc ● All data (e.g. containers) are unchanged on upgrade. ● /etc gets updated through a 3-way merge.
  14. 14. Docker ● Built-in Docker run time in Atomic host. ● Docker run would just work. – $docker run -t -i fedora /bin/bash
  15. 15. Kubernetes ● An open source system for managing containerized applications across multiple hosts ● It gives basic mechanisms for deployment, maintenance, and scaling of applications.
  16. 16. Nulecule ● Provide a simple, flexible way to describe a multi-container application, including all dependencies. https://github.com/projectatomic/nulecule ● Nulecule: The mother of all atomic particles ● Refer: http://simpsons.wikia.com/wiki/Made- up_words
  17. 17. Cockpit ● Server manager for administrating Linux servers via web browser. ● Designed to be multi-server ● Support for managing containers, Kubernetes. ● http://cockpit-project.org/
  18. 18. /usr/bin/atomic ● Coherent entry point : manage host and containers with the atomic command. ● Fill gaps in Linux container implementations. – e.g. “atomic install foo” can install a container with its k8s configuration and/or systemd unit file. – “atomic run” grabs the LABEL “run” with its all command line details. – It can serve as metadata for containers for different use cases
  19. 19. SPC ● SPC = Super Privileged Containers ● Tools container ● Allows applications inside of containers to interact with or control the host, very useful for system and monitoring tools
  20. 20. Special interest groups (SIGs) ● For building specialized variants of CentOS that fulfill specific sets of requirements. ● Freedom to modify and enhance CentOS in various ways, including adding more cutting-edge software, rebuilding existing packages. ● To get the best of both worlds – the overall stability of CentOS and newer technology from various open source projects.
  21. 21. CentOS Atomic SIG ● To deliver CentOS based Atomic host. ● Also building a downstream of RHEL Atomic host. ● http://wiki.centos.org/SpecialInterestGroup/Atomic ● Centos-devel Mailing list and irc channel.
  22. 22. References ● Introduction to Atomic - Joe Brockmeier - https://www.youtube.com/watch?v=cPltG4Yd KVE ● https://github.com/GoogleCloudPlatform/kube rnetes ● https://github.com/projectatomic
  23. 23. Get involved ● Website: projectatomic.io ● Github: github.com/projectatomic ● #atomic on Freenode ● centos-devel, atomic-devel, atomic ML ● Facebook.com/projectatomic ● Twitter @projectatomic
  24. 24. Thank you :-) Any questions please?

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