OWF: Xen - Open Source Hypervisor Designed for Clouds
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Lars Kurth, a prominent figure in the Xen Project and community manager for Citrix, emphasizes the importance of service stability and responsiveness in IT. The document outlines the architecture and evolution of the Xen hypervisor, its integration with various cloud services, and the ongoing development within the open source community. Significant investments have been made in enhancing Xen's capabilities and support for OpenStack, reflecting its critical role in cloud computing infrastructures.
OWF: Xen - Open Source Hypervisor Designed for Clouds
- 1. Lars Kurth Community Manger, Xen Project Chairman, Xen Project Advisory Board Director, Open Source, Citrix lars_kurth
- 2. Was a contributor to various projects Worked in parallel computing, tools, mobile and now virtualization Long history in change projects Community guy at Symbian Foundation Learned how NOT to do stuff Community guy for the Xen Project Working for Citrix Accountable to Xen Project Advisory Board Chairman of Xen Project Advisory Board
- 4. Stability is Paramount Value of IT: consistent service availability Service capacity specified a year or more in advance What’s up, stays up Change is Bad Change to status quo is disruptive and dangerous
- 5. Availability of Services is Paramount Value of IT: consistent service availability matching dynamic business demand Service capacity must move with business needs What’s up when depends on what’s needed when Change is Good Services must change to cover the needs of the moment Lack of change = lack of value
- 6. It must be stable It must be secure It must be configurable on a large scale It must take orchestration It must be multi-tenant
- 8. An Open Source Hypervisor > 10M Users Powering some of the biggest Clouds in Production Amazon Web Services, Rackspace Public Cloud, Terremark, … Several sub-projects Xen Hypervisor, XAPI management tools, Mirage OS Linux Foundation Collaborative Project Sponsored by Amazon Web Services, AMD, Bromium, Calxeda, CA Technologies, Cisco, Citrix, Google, Intel, NetApp, Oracle, Samsung and Verizon 10 years old
- 9. with a twist
- 10. VM2 VMn Applications Applications Guest OS Guest OS Applications Applications VM1 (or DomU) Applications Guest OS VM0 (or Dom0) Toolstack Dom0 Kernel HWCPUsMemoryI/O Scheduler MMU Timers InterruptsConfig
- 11. VM2 VMn Applications Applications Guest OS Guest OS Applications Applications VM1 (or DomU) Applications Guest OS VM0 (or Dom0) Toolstack Dom0 Kernel HWCPUsMemoryI/O Drivers Scheduler MMU Timers InterruptsConfig back PV front
- 12. VM2 VMn Applications Applications Guest OS Guest OS Applications Applications VM1 (or DomU) Applications Guest OS VM0 (or Dom0) Toolstack Dom0 Kernel HWCPUsMemoryI/O QEMU Scheduler MMU Timers InterruptsConfig
- 16. Service VM Guest OS Dom0 Toolstack Dom0 Kernel HWCPUsMemoryI/O Scheduler MMU Timers InterruptsConfig Driver(s) QEMU Disaggregation
- 17. Service VM Guest OS Dom0 Toolstack Dom0 Kernel HWCPUsMemoryI/O Scheduler MMU Timers InterruptsConfig QEMU Linux Security Modules / SELinux Xen Security Modules / FLASK
- 19. Single Host Basic Functions Multiple Hosts Additional Functionality Multiple Hosts More Functionality Increased level of functionality and integration with other components Toolstack / Console Hypervisor Xen Hypervisor XAPI / XEDefault / XL Libvirt / VIRSH
- 20. Xen XAPI
- 21. XAPI / XEDefault / XL Xen Hypervisor Toolstack / Console Hypervisor Libvirt / VIRSH
- 22. It must be stable It must be secure It must be configurable on a large scale It must take orchestration It must be multi-tenant AWS, Rackspace Public Cloud, Terremark, many others … Tons of features: see tinyurl.com/xen-secure Puppet, Chef, Salt, … − GUIs − APIs − Orchestration Apache CloudStack, OpenNebula, OpenStack, … Pools and other functionality in XAPI
- 24. DOM0 VM1 VMn Guest OS Guest OS Applications Applications QEMU Drivers XS Tools XS Tools XAPI 3rd party Components HA Storage Mgr
- 25. DOM0 VM1 VMn Guest OS Guest OS Applications Applications QEMU Drivers XS Tools XS Tools XAPI 3rd party Components HA Storage Mgr
- 26. DOM0 QEMU Drivers XAPI 3rd party Components HA Storage Mgr Virtualization Base Packages (Xen, QEMU, Libvirt) xenserver-core package (XAPI, Storage Manager, …) (Currently excluding 3rd party stuff) Base Distro (CentOS, Debian, Ubuntu)
- 28. 71% 13% 8% 5% 3% Hypervisor KVM Xen (inc. XAPI) ESX LXC HyperV Source: http://fr.slideshare.net/openstack/havana-survey-resultsfinal-19312081 (before Xen Project and OSS XenServer)
- 29. Not on Feature and Quality parity yet Significant progress in Havanah / 13.2 Xen and XAPI not perceived to be Open Source This is now different Citrix backing of Apache CloudStack Created “confusion” in the marketplace Created resentment by OpenStack developers
- 30. Source: https://wiki.openstack.org/wiki/HypervisorSupportMatrix Group A (Fully Supported) Most Features KVM/QEMU + LIBVIRT Group B (Gate Tested) Missing: Volume Swap Volume Rate Limiting XEN + XAPI Group C (Minimal Testing) Missing: See table All the others Xen + LIBVIRT TBD Significant Investment
- 34. Source: https://wiki.openstack.org/wiki/XenServer/DevStack DevStack: Script to set up OS VM Also adds: • Swift • Glance • Horizon
- 35. Havanah 2013.2: OpenStack support for xenserver-core More Tests; Improved Quality (moving towards Group A) Icehouse 2014.1 Feature catch-up (not in one go) ARM support for xenserver-core Expanding VGPU Functionality Desktop and Enterprise Features
- 36. Impact: OpenStack can also run in Dom0 Closer to OpenStack Usage Model Closer to OpenStack Development Model More Deployment Options (Security) localhost
- 38. 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 Developer list traffic : Q3 2003 - now
- 39. 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 2010 2011 2012 2013 (H1) UPC Spectra Logic Redhat iweb GridCentric Calxeda Fujitsu (Misc) AWS (Academia) John Hopkins University AMD Linaro Oracle NSA Intel
- 41. Xen is a great solution for the Cloud Significant Investment in XAPI + OpenStack As well as CloudStack The Xen Community is accelerating
- 44. Please rate the talk on slideshare or twitter www.slideshare.net/xen_com_mgr/
- 45. Flickr: “Giant Sequoia Trees” by Raj Wikipedia: “Bodium Castle” by Antony McCallum Other Images: By Lars Kurth or acquired Xen Project: www.xenproject.org wiki.xenproject.org lists.xenproject.org xenbits.xenproject.org @xen_org ##xen