Kolla: Docker, Kubernetes & Atomic

Ken ThompsonSenior Cloud Solution ArchitectMay 2015

Deploying OpenStack Services with Linux Containers

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“The Kolla Project is part of the OpenStack TripleO effort,

focussed on deploying OpenStack services using

Docker containers”

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Discrete services, when combined providing private cloud capabilities

OPENSTACK IN THEORY

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Not so discrete services... with complex interdependencies, which complicates the deployment and lifecycle of OpenStack environments

OPENSTACK IN REALITY

Journey to the Cloud with Red Hat – Technical Event Series – May 20155

HOW CONTAINERS HELPPackaging OpenStack services with their runtime dependencies reduces deployment and lifecycle complexities

● Easy to deploy and portable across host systems

● Isolates applications on a host operating system

● In RHEL, this is done through:● Control Groups (cgroups)● Kernel namespaces● SELinux, sVirt, iptables● Docker

HOST OS

SERVER

CONTAINER

LIBS

APP

Journey to the Cloud with Red Hat – Technical Event Series – May 20156

TRADITIONAL OS VS. CONTAINERS

Traditional OS Containers

HARDWARE

HOST OS

HARDWARE

HOST OS

CONTAINER

LIBS

NOVA

LIBS A LIBS B LIBS LIBS

NOVACONTAINER

LIBS

CINDER

Packaged dependencies = faster boot times + greater portability

CINDER

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PUTTING IT ALL TOGETHORLeveraging best of breed container technologies

CONTAINER FORMAT WITH DOCKER

● Interface for communications, configuration, data persistence, provisioning

● Lightweight

● Packaged dependencies

● Content & Infrastructure agnostic

ORCHESTRATION WITH KUBERNETES

● Orchestrate containers at scale

● Define application topologies

● Handle container networking

● Manage container state

● Schedule across hosts

CONTAINER HOSTING WITH ATOMIC

● Lightweight

● Atomic updates and rollbacks

● Security & Isolation (cgroups, namespaces, selinux, svirt, selinux, iptables etc)

● Provides portability across systems

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COMMUNITIES & FURTHER INFOGo forth, experiment & contribute!

https://launchpad.net/kolla

https://github.com/stackforge/kolla

https://github.com/projectatomic

https://github.com/googlecloudplatform/kubernetes

https://github.com/larsks/heat-kubernetes

http://Projectatomic.io

http://Kubernetes.io

http://www.openshift.org/

http://www.allthingsopen.com

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THANK YOUken@redhat.com

plus.google.com/+RedHat

linkedin.com/company/red-hat

youtube.com/user/RedHatVideos

facebook.com/redhatinc

twitter.com/RedHatNews

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APPENDIX

11

Linux kernel(cgroups, namespaces, SELinux,

devicemapper filesystem)

docker

atomic

Red Hat Enterprise Linux Atomic Host

atomic

Systemd / journald

kubernetes

docker

atomic

Red Hat Enterprise Linux Atomic Host

atomic

Systemd / journald

Linux kernel(cgroups, namespaces, SELinux,

devicemapper filesystem)

Running linux containers requires an entire stack rooted in the Operating System

RHEL ATOMIC HOST

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KubernetesDeclarative container orchestration