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OpenNebula at Etnetera 
(ONE useful even at small scale)
# whoami 
● Jan Horacek aka jahor, @jhrcz 
● sysadmin at Etnetera a.s. (http://etnetera.cz/en) 
● like to automate things,...
OpenNebula @ Etnetera 
● ~3 year in production - a bit cloudy VDC 
● 8 nodes (192cores, 768gigs ram), 11TB ds, 260 images,...
there is allways something... small to hack on 
● lvm as a system datastore - nonpersistent vols in lvm 
● io capping / bo...
| Název prezentace | Jméno Příjmení
sometime you do bad choices - they could have sollution 
ONE could start small and then it could grow in time 
ONE is real...
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OpenNebulaConf 2014 - Lightning talk: OpenNebula at Etnetera - Jan Horacek

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OpenNebulaConf 2014 - Lightning talk: OpenNebula at Etnetera - Jan Horacek

  1. 1. OpenNebula at Etnetera (ONE useful even at small scale)
  2. 2. # whoami ● Jan Horacek aka jahor, @jhrcz ● sysadmin at Etnetera a.s. (http://etnetera.cz/en) ● like to automate things, have the workflow given and documented ● 150empl development company, java and oss based ● 10 sysadmins, 80% developers/coders ● we make webs (but not only...;o) ● jNetPublish, CMS (http://jnetpublish.cz), customizing and running for our clients ● soyka (http://soyka.etnetera.cz/en) - personalisation tool ● smartmeter (http://smartmeter.etnetera.cz/en) - stress testing tool, jmeter on steroids ● ewa (http://ewa.etnetera.cz) - etnetera web accelerator | Název prezentace | Jméno Příjmení
  3. 3. OpenNebula @ Etnetera ● ~3 year in production - a bit cloudy VDC ● 8 nodes (192cores, 768gigs ram), 11TB ds, 260 images, 150 vms ● clvm, gfs2, mgmt node disconnected from cluster ● lvm as system datastore ● contextualization independent - dhcp in sync with onevnets ● now we are on latest stable (after testing) ● 3.2.1 (2012) ● 4.2 (2014-04) - switch to “almost vanilla” lvm driver ● 4.6.2 (2014-08), 4.8 (2014-11), 4.10.1 (2014-11) ● started with rewritten lvm storage driver - aka gfs2clvm ● now lvm driver with ~5 small patches | Název prezentace | Jméno Příjmení
  4. 4. there is allways something... small to hack on ● lvm as a system datastore - nonpersistent vols in lvm ● io capping / boosting (with cgroups), cpu.shares ~ vcpu (gh) ● per vm io boost, low io base + BLKIO_BOOST vm param ● reveals wrong behaving vms ● global cpu / memory overcommit (gh) ● vm owner (gh) / vm name fixing (gh) ● per vm dns names ($VMID.vms.one1.etn) (gh) ● template owner vs image owner checker (gh) ● template backup and history (gh) ● reinstantiate command (new vmid, uptodate tpl) (gh) ● kvm clock resync after suspend (gh) | Název prezentace | Jméno Příjmení
  5. 5. | Název prezentace | Jméno Příjmení
  6. 6. sometime you do bad choices - they could have sollution ONE could start small and then it could grow in time ONE is realy simple, transparent and customizable Thank YOU! | Název prezentace | Jméno Příjmení

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