All about open stack
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The document is a presentation by Nick Jones on OpenStack, covering its definition as a cloud operating system, its project history, key components such as compute (Nova), storage (Cinder), and networking (Neutron), as well as its installation and maintenance tools. It highlights notable users like CERN and Walmart, and outlines the need for automation in deployment through tools like Puppet. Additionally, it addresses various operational challenges encountered in the OpenStack ecosystem.
All about open stack
- 1. Introduction Nick Jones Senior Cloud Systems Engineer at DataCentred 1
- 2. Agenda • Introduction to OpenStack • What does it do • Project history • Who uses it • OpenStack Components • Core components 2
- 3. Agenda, cont. • OpenStack Architecture • How everything fits together • Installation • Tools to deploy OpenStack • Operation and Maintenance • Care and feeding of an OpenStack installation 3
- 4. What is OpenStack? "OpenStack is a cloud operating system that controls large pools of compute, storage, and networking resources throughout a datacenter, all managed through a dashboard that gives administrators control while empowering their users to provision resources through a web interface." -- https://www.openstack.org/software/ 4
- 5. Project History • July 2010, privately developed by RackSpace and NASA • October 2010, first release - 'Austin' • February 2011, 'Bexar', April 2011, 'Cactus' - 6-month development cycle starts • April 2014, Icehouse - still security supported • October 2014, Juno - current Production release • April 2015, Kilo - under development 5
- 6. Who uses OpenStack • CERN - LHC, 4000+ physical hosts • WalMart - entire US production traffic • BMW • eBay • Disney • Comcast 6
- 7. OpenStack Components 1 1 Thanks to Sean Dague - https://dague.net 7
- 8. Identity Service - Keystone • Centralized policies across users and systems • Create users and tenants with appropriate permissions • Integrate into existing directory services (LDAP) • Maintains catalogue of services 8
- 9. Image Service - Glance • Operating System images • Snapshots • Supports many formats - RAW, qcow2 (QEMU / KVM), VMDK (VMware), OVF, etc. 9
- 10. Compute Service - Nova • Effectively the 'brain' of an OpenStack installation • Manage virtualised hardware resources • Can also provide software-defined networking • Supports many different hypervisors - KVM, Xen, VMware ESXi, Hyper-V... 10
- 11. Networking Service - Neutron • Software-defined networking component • Users define their own virtual networks • Manages IP address assignment • Floating IP addresses • Supports different back-ends - OpenvSwitch, VMware NSX, Cisco UCS, Midokura.... 11
- 12. Block Storage Service - Cinder • Persistent block storage to compute instances • Support for various back-ends - Ceph, NetApp, Nexenta, SolidFire... 12
- 13. Other key services • Horizon - web UI / dashboard • Ceilometer - monitoring and metering / billing • Swift - object and block storage • Ceph - alternative for object and block storage 13
- 14. Choice! 14
- 15. Supporting Services • Presentation - Apache, nginx • Loadbalancing - keepalived, haproxy • Messaging - RabbitMQ • State - MySQL / MariaDB 15
- 20. Network 20
- 22. Installation • Manual installations untenable for any serious deployment • Use configuration management and orchestration • Puppet 22
- 23. Deployment with Puppet • Programmatically define server and service configuration • Relationships between services • Driven by data • Describe and document infrastructure • Scalable 23
- 24. Puppet, continued • OpenStack official Puppet modules • Neutron = 8422 LOC • Nova = 6678 LOC • Glance = 3336 LOC • Cinder = 6379 LOC • Keystone = 4020 LOC 24
- 25. 2478 LOC to deploy OpenStack 25
- 26. Foreman • Lifecycle management • Physical and virtual • External node classification (ENC) for Puppet - control node, network node, compute node 26
- 29. Monitoring, continued • ELK stack • Elasticsearch, logstash, Kibana • Riemann • Icinga / Nagios 29
- 30. Development • Python • Build staging and test - OpenStack-on-OpenStack • Devstack • Make use of tools such as Vagrant 30
- 31. Patching Giftwrap - https://github.com/blueboxgroup/giftwrap • Manage patches • Security • Features • Fixes • Resolve dependancies 31
- 32. Problems • Developer expertise • Tackle features like onboarding • Gaps in features • Networking HA still a bit of a mess • Incomplete IPv6 support • Hypervisor scheduling 32
- 33. Problems, continued • Supporting services • HA with RabbitMQ doesn't always work as expected • Some services outside of 'core' less reliable • Ceilometer in particular • Horizon can be confusing and has some idiosyncrasies • Nothing to stop you building your own alternative! 33
- 34. Questions? 34