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A One stop solution for Puppet and Openstack -...
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Daniel Lobato García
August 23, 2013
Programming
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A One stop solution for Puppet and Openstack - PuppetConf 13'
Daniel Lobato García
August 23, 2013
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Transcript
A one stop solution for Puppet and Openstack Daniel Lobato
Garcia daniel.lobato.garcia@cern,ch @eLobatoss
None
What is CERN Between Geneva and the Jura mountains, straddling
the Swiss- French border Mission: learn what is the universe made of and how does it work? 3
Fundamental questions in physics Why do particles have mass? What
is 96% of the universe made of? Why isn’t there anti-matter in the universe? What was the state of matter after the Big Bang? 4
8/12/2013 Document reference 5
8/12/2013 Document reference 6
8/12/2013 Document reference 7
8/12/2013 Document reference 8
Current status • 270 Openstack hypervisors • 2900 virtual machines
• 300 users • 14 Puppet masters • 6 Foreman backend nodes • Some production services migrating to our cloud – early birds 9
Goals • Ramp up to 15K hypervisors – 150-200K vms
in 2015 • Multi-site (Hungary) 10
8/12/2013 Document reference 11
8/12/2013 Document reference 12
Why? • Unnecessary homebrew stack of tools • Shift to
cloud standards with minimal customizations • High turnover – can’t teach new tools 13
Why? • Symbiotic relationship with the community 14
Openstack? • Modular IaaS free open source project • APIs
~compatible with those of Amazon 15
Openstack Nova (compute) Cloud fabric controller 16
Openstack Keystone (Identity) RBAC Integrated with LDAP Multiple auth* methods
17
Openstack Glance (Images) Discovery, registration, delivery of images 18
Openstack Horizon (Dashboard) 19
Modules • Puppet definitions for every use case you can
imagine. • Dynamic environments • Hadoop node • Openstack hypervisor • … you name it 20
21 Workflow..?
Modules and Git • Manifests and hieradata are version controlled
22
23 Git workflow Puppet masters
24 Easy cherry pick
25 Git workflow
26 Git workflow Jens ‘Puppetfiles’ Separate repositories Makes environments from
YAML config files Puppet master rsync
27 upstream.yaml --- default: production notifications:
[email protected]
overrides: modules: foreman:
upstream puppet: upstream ‘Puppetfiles’
Foreman • Lifecycle management tool for VMs and physical servers
• External Node Classifier – tells the puppet master what a node should look like 28
29
30
Power operations & Foreman 8/12/2013 Document reference 31 Foreman Proxy
Physical box IPMI Physical box IPMI Physical box IPMI VM VM VM Openstack Nova API
Openstack VM creation 8/12/2013 Document reference 32
Openstack VM creation 8/12/2013 Document reference 33
Openstack VM creation 8/12/2013 Document reference 34
Scalability experiences • Split up services • Puppet – critical
vs non critical 35 12 backend nodes Batch 4 backend nodes Interactive
Scalability experiences • Foreman – split into different services 36
ENC Reports processing UI/API Load balancer 9443 – UI/API 9444 – Reports 9445 – ENC …
Scalability experiences • Autoscale via alarms (Heat) • Define situations
(i.e: load threshold..) • Spin up VMs as needed 37
Scalability guidelines 38
github.com / cernops 39
40
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