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.

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

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DISCUSSION FLOW

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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

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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.

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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.

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DOCKER as a LXC MANAGER
Server
Host OS
Bins/Libs
APP
Bins/Libs
App
Where does Docker fits
here?

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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

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DOCKER as a LXC MANAGER
Server
Host OS
Docker
Bins/Libs
APP
Bins/Libs
App

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

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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

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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

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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

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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

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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)

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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

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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. ”

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