Containers are the future of Cloud

Pavel OdintsovCTO, FastVPS Eesti OU

odintsov@fastvps.ee

Open source virtualization platforms

KVM

Main developer: RedHat

Kernel integration state: in kernel since 2007

Status: production ready

Hardware support: same as LinuxVirtualization type: full virtualizationSupported client OS: Linux, FreeBSD, Windows

KVM architecture

Xen

Main developer: Citrix, XenSource

Kernel integration state: partially in kernel since 2012 (client), no plans about the server

Status: production ready

Hardware support: only fixed number of hardware, see HCL Virtualization type: full virtualization, paravirtualizationSupported client OS: Linux, FreeBSD, Windows

Xen architecture

OpenVZ

Main developer: Parallels (ex. SwSoft)

Kernel integration state: partially in kernel and work in progress

Status: production ready

Hardware support: same as Linux Virtualization type: os level virtualization, containerizationSupported client OS: Linux

OpenVZ architecture

LinuX Containers, LXC

Main developer: same as kernel (Intel, IBM, Parallels)Kernel integration state: partially in kernel and work in progressStatus: not ready for production (issues in network, disk)Hardware support: same as Linux Virtualization type: os level virtualization, containerizationSupported client OS: Linux

LinuX Containers, LXC architecture

Why OpenVZ?

• Production ready since 2006

• Extremely low overhead (in compare with Xen/KVM is about 20%)

• Simple integration into Linux stack

• Many successful projects (LXC): Heorku, CloudLinux, Docker (dot.cloud)

KVM vs OpenVZ vs Xen LAMP

KVM vs OpenVZ vs Xen Web App

OpenVZ customers

OpenVZ requirements• Almost any physical server (yes, you can use old notebook)• Operation system: CentOS 6, RHEL 6 or Scientific Linux 6• One external or internal IP address• Internet connection (only for downloading packages and templates)• One hour of free time

OpenVZ, server resources

Server resources:• RAM• HDD• CPU• Network

OpenVZ deploymentecho "SELINUX=disabled" > /etc/sysconfig/selinuxwget -P /etc/yum.repos.d/ http://ftp.openvz.org/openvz.repoyum install -y vzkernelyum install -y vzctl vzquota ploopshutdown –r nowyum remove kernel -y

OpenVZ – container creating

vzctl create 101 --ostemplate debian-6.0-x86_64 --layout ploop --ipadd 88.198.144.251 --hostname mytesthostname.ru --config vswap-2g --diskspace 10Gvzctl set 101 --onboot yes --ram 4G --swap 1G --diskspace 20G --savevzctl start 101vzctl set 101 --userpasswd root:openvz_2013

OpenVZ – additional tools

• vzctl destroy – remove container with all data• vzctl stop – container stop• vzlist –a – list of all available containers on

host

OpenVZ information

• http://openvz.org• http://twitter.com/_openvz_• http://bugzilla.openvz.org• http://openvz.livejournal.com• http://git.openvz.org

Thank you! :)

Pavel OdintsovCTO, FastVPS Eesti OU

odintsov@fastvps.ee