Understanding LXC & Docker

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The goal of LXC is to create an environment as close as possible as a standard Linux installation but without the need for a separate kernel.

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Understanding LXC & Docker
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By Prasad Puranik (@pspuranik)

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UNDERSTANDING LXC
LXC (LinuX Containers) is
an operating system–level
virtualization method for
running multiple isolated
Linux systems (containers)
on a single control host.
Server
Host OS
Bins/Libs
APP
Bins/Libs
App
LXC
ISOLATED

www.comprinno.net 4
UNDERSTANDING LXC
Kernel
uts
mount
pid
network
user
ipc
LXC (LinuX Containers) is
an operating system–level
virtualization method for
running multiple isolated
Linux systems (containers)
on a single control host. This
is accomplished through
kernel level isolation.

www.comprinno.net 5
UNDERSTANDING LXC
LXC uses many kernel
features to contain
processes.
Kernel Namespaces
AppArmor & SELinux Profiles
Seccomp policies
chroot
cgroups

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UNDERSTANDING LXC
The goal of LXC is to create an environment
as close as possible as a standard Linux
installation but without the need for a separate
kernel.

www.comprinno.net 7
DOCKER as a LXC MANAGER
Server
Host OS
Bins/Libs
APP
Bins/Libs
App
Where does Docker fits
here?

www.comprinno.net 8
DOCKER as a LXC MANAGER
Server
Host OS
Docker
Bins/Libs
APP
Bins/Libs
AppOn top of this low-level
foundation of kernel features,
Docker offers a high-level
tool with several powerful
functionalities

www.comprinno.net 9
DOCKER as a LXC MANAGER
Server
Host OS
Docker
Bins/Libs
APP
Bins/Libs
App

www.comprinno.net 10
DOCKER as a LXC MANAGER
Portable deployment across machines
Application-centric
Automatic build
Versioning
Component re-use
Tool ecosystem

www.comprinno.net 11
LXC vsVM
Server
Host OS
Docker
Bins/Libs
AP`P
Bins/Libs
App
Server
Host OS
Hypervisor
Guest OS
Bins/Libs
APP
Bins/Libs
App
Guest OS
Bins/Libs
APP
Bins/Libs
App
LXC
VM

www.comprinno.net 12
LXC vsVM
Server
Host OS
Docker
Bins/Libs
AP`P
Bins/Libs
App
LXC
Lightweight & Resource
Friendly
Comprehensive process and
resource isolation
Rapid & Easy Deployment

www.comprinno.net 13
LXC vsVM
Lightweight & Resource
Friendly
Comprehensive process and
resource isolation
Rapid & Easy Deployment
Who all are choosing LXC overVM?

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WHY DOCKER(LXC)?
QUICK AND EASY MULTI-TENANCY
LOW COSTS ENV ISOLATION
FASTER MIGRATIONTO SaaS MODEL

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DOCKER FOR QUICK AND EASY MULTI-TENANCY
:
Host OS
Docker
Bins/Libs
APP
Bins/Libs
App
Bins/Libs
App
Bins/Libs
App
Bins/Libs
App

www.comprinno.net 16
DOCKER FOR QUICK AND EASY MULTI-TENANCY
:
Host OS
Docker
Bins/Libs
APP
Tenant1
Bins/Libs
App
Tenant2
Bins/Libs
App
Tenant3
Bins/Libs
App
Tenant4
Bins/Libs
App
Tenant5

www.comprinno.net 17
DOCKER FOR LOW COST ENV ISOLATION
:
Host OS
Docker
Bins/Libs
APP
Tenant1
Bins/Libs
App
Tenant2
Bins/Libs
App
Tenant3
Bins/Libs
App
Tenant4
Bins/Libs
App
Tenant5
Isolation using chroot,
cgroup, namespaces,
SELinux, AppArmor,
netfilter (iptables)

www.comprinno.net 18
DOCKER FOR FASTER MIGRATIONTO SaaS MODEL
:
Host OS
Docker
Bins/Libs
APP
Tenant1
Bins/Libs
App
Tenant2
Bins/Libs
App
Tenant3
Bins/Libs
App
Tenant4
Bins/Libs
App
Tenant5

www.comprinno.net 19
CONCLUDING REMARKS
:
“If you can run your application on
Linux host, you can run it in LXC too.
You don’t need separateVM for that. ”

www.comprinno.net 20
About COMPRINNO
We are Cloud Solution Provisioning &
Management Experts.
We help enterprises devising, implementing
and managing cloud based IT infrastructure
and services.
We work in the domains of Cloud Computing,
Big Data, DevOps, Storage and Security.
Founded in 2013, we are a Bangalore based
company.
Our ability to deal with
complex technologies
with the ease
Our approach towards
our customers, partners,
employees &
shareholders
Our commitment for
continues improvement in
our services, products
and processes
COMPRINNO stands for

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Understanding LXC & Docker

1. Understanding LXC & Docker www.comprinno.net 1 By Prasad Puranik (@pspuranik)

2. www.comprinno.net 2 DISCUSSION FLOW

3. www.comprinno.net 3 UNDERSTANDING LXC LXC (LinuX Containers) is an operating system–level virtualization method for running multiple isolated Linux systems (containers) on a single control host. Server Host OS Bins/Libs APP Bins/Libs App LXC ISOLATED

4. www.comprinno.net 4 UNDERSTANDING LXC Kernel uts mount pid network user ipc LXC (LinuX Containers) is an operating system–level virtualization method for running multiple isolated Linux systems (containers) on a single control host. This is accomplished through kernel level isolation.

5. www.comprinno.net 5 UNDERSTANDING LXC LXC uses many kernel features to contain processes. Kernel Namespaces AppArmor & SELinux Profiles Seccomp policies chroot cgroups

6. www.comprinno.net 6 UNDERSTANDING LXC The goal of LXC is to create an environment as close as possible as a standard Linux installation but without the need for a separate kernel.

7. www.comprinno.net 7 DOCKER as a LXC MANAGER Server Host OS Bins/Libs APP Bins/Libs App Where does Docker fits here?

8. www.comprinno.net 8 DOCKER as a LXC MANAGER Server Host OS Docker Bins/Libs APP Bins/Libs AppOn top of this low-level foundation of kernel features, Docker offers a high-level tool with several powerful functionalities

9. www.comprinno.net 9 DOCKER as a LXC MANAGER Server Host OS Docker Bins/Libs APP Bins/Libs App

10. www.comprinno.net 10 DOCKER as a LXC MANAGER Portable deployment across machines Application-centric Automatic build Versioning Component re-use Tool ecosystem

11. www.comprinno.net 11 LXC vsVM Server Host OS Docker Bins/Libs AP`P Bins/Libs App Server Host OS Hypervisor Guest OS Bins/Libs APP Bins/Libs App Guest OS Bins/Libs APP Bins/Libs App LXC VM

12. www.comprinno.net 12 LXC vsVM Server Host OS Docker Bins/Libs AP`P Bins/Libs App LXC Lightweight & Resource Friendly Comprehensive process and resource isolation Rapid & Easy Deployment

13. www.comprinno.net 13 LXC vsVM Lightweight & Resource Friendly Comprehensive process and resource isolation Rapid & Easy Deployment Who all are choosing LXC overVM?

14. www.comprinno.net 14 WHY DOCKER(LXC)? QUICK AND EASY MULTI-TENANCY LOW COSTS ENV ISOLATION FASTER MIGRATIONTO SaaS MODEL

15. www.comprinno.net 15 DOCKER FOR QUICK AND EASY MULTI-TENANCY : Host OS Docker Bins/Libs APP Bins/Libs App Bins/Libs App Bins/Libs App Bins/Libs App

16. www.comprinno.net 16 DOCKER FOR QUICK AND EASY MULTI-TENANCY : Host OS Docker Bins/Libs APP Tenant1 Bins/Libs App Tenant2 Bins/Libs App Tenant3 Bins/Libs App Tenant4 Bins/Libs App Tenant5

17. www.comprinno.net 17 DOCKER FOR LOW COST ENV ISOLATION : Host OS Docker Bins/Libs APP Tenant1 Bins/Libs App Tenant2 Bins/Libs App Tenant3 Bins/Libs App Tenant4 Bins/Libs App Tenant5 Isolation using chroot, cgroup, namespaces, SELinux, AppArmor, netfilter (iptables)

18. www.comprinno.net 18 DOCKER FOR FASTER MIGRATIONTO SaaS MODEL : Host OS Docker Bins/Libs APP Tenant1 Bins/Libs App Tenant2 Bins/Libs App Tenant3 Bins/Libs App Tenant4 Bins/Libs App Tenant5

19. www.comprinno.net 19 CONCLUDING REMARKS : “If you can run your application on Linux host, you can run it in LXC too. You don’t need separateVM for that. ”

20. www.comprinno.net 20 About COMPRINNO We are Cloud Solution Provisioning & Management Experts. We help enterprises devising, implementing and managing cloud based IT infrastructure and services. We work in the domains of Cloud Computing, Big Data, DevOps, Storage and Security. Founded in 2013, we are a Bangalore based company. Our ability to deal with complex technologies with the ease Our approach towards our customers, partners, employees & shareholders Our commitment for continues improvement in our services, products and processes COMPRINNO stands for

21. www.comprinno.net 21 Connect With Us blogs.comprinno.net @ComprinnoTech /ComprinnoTechnologies info@comprinno.net +91-80-2257-9047 +91-98863-01605

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