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Foreman in your datacenter

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Slide deck about managing data centers with Foreman (www.theforeman.org) as presented at LinuxDAYS 2015 Prague.

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Foreman in your datacenter

  1. 1. Foreman in Your Data Center Lukáš Zapletal @lzap
  2. 2. Agenda ● Introduction – Provisioning – Configuration – Monitoring ● History and Technology ● Architecture and Installation ● Demo: Foreman Basics ● Customizing foreman – Automating with CLI + API – Plugins (Bootdisk, Discovery, Docker, Katello, Chef, Salt, Hooks, Remote Execution) ● Demo: Foreman Plugins
  3. 3. Foreman's Realm Managing the Lifecycle of your Systems
  4. 4. Foreman
  5. 5. ● Provision new machines or containers to (almost) anything – Bare metal, oVirt, libvirt, VMware, Docker, EC2, Rackspace, Digital Ocean, OpenStack, etc. ● If we don't support it today, we can via new plugins
  6. 6. ● Provisioning types: – PXE - via PXELinux and kickstart, preseed, AutoYAST, etc – Image-based - cloning, configured over SSH or user data (cloudinit) ● For virtualization provider, we create the VM ● For everything we orchestrate related services through Smart Proxies – DNS - DHCP / TFTP – FreeIPA Realm - Configuration Management
  7. 7. ● Puppet ● Via plugins: – Chef – Salt – Ansible ● Automatic registration & setup of clients, including autosigning certs/keys ● Defining: ● Classes / states ● Parameters / pillars ● Inventory data: ● Facts / Grains ● results of configuration runs
  8. 8. ● Generic Report API with graphs/trends: – System Inventories – Reports from runs – Generic reports: ABRT, OpenSCAP ● Context sensitive search: – Not full-text (SQL level) – Keyword completion – Works across whole application
  9. 9. Distributed Architecture ● Smart Proxies located locally on Foreman itself or independent – (orchestration) ● Large organizations and/or multi-tenancy: – Organizations (Divisions) – Locations ● Strong RBAC model – Users / Groups – Permissions / Filters ● LDAP / MS-AD integration
  10. 10. History ● Project started in July 2009 ● Initial set of features: Puppet + PXE provisioning ● 213 unique contributors (winter 2015) ● Core team sponsored by Red Hat (GMT +10 -8) ● Translated to 13 languages ● Healthy and friendly community ● Reported usage: Red Hat, CERN, EMC, Citrix, DHL, BBC, Digg, Good Data, Mozilla, eBay/Paypal (100,000 nodes)
  11. 11. Technology Foreman itself – Ruby on Rails application – Targeted on UNIX platforms, Ruby 1.9+ – Steep learning curve (git clone, bundle install) ● Smart Proxy – Ruby / Sinatra application – Minimum dependencies – Quick start (git clone, bundle install) – On all Ruby 1.8+ platforms (incl. MS Windows)
  12. 12. Installation ● Repositories for RHEL/Fedora, Debian/Ubuntu ● Puppet-based installer ● Sane defaults for POC deployments ● Able to install, configure and manage: – Foreman app – Smart-proxies – Services: DNS, DHCP, TFTP, Puppet – Selected plugins # foreman-installer -h | wc -l 439
  13. 13. Demo: Foreman Basics
  14. 14. Customization ● Customize Foreman to support your workflows! – Configuration options in UI: Adminster → Settings – Smart proxy configuration values (features) – Automation with API + CLI – Foreman Plugins – Smart Proxy Plugins – Foreman Hooks Plugin
  15. 15. API & CLI ● Full UI coverage ● All of our API is documented ● Documentation DSL generates dynamic Ruby bindings ● Full RESTful API – Docs at /apidoc on your Foreman server – Also available at http://www.theforeman.org/api/1.9/index.html
  16. 16. Hammer CLI ● On par with UI ● Username/Password authentication ● Easy to use, great for working in shell hammer salt-key list --smart-proxy=smartproxy.example.com
  17. 17. Plugins More Info: http://projects.theforeman.org/projects/foreman/wiki/List_of_Plugins Rich ecosystem of existing plugins
  18. 18. Bootdisk plugin ● Small hybrid ISO downloaded from Host UI page ● Unknown or pre-registred hosts boot chainloads from Foreman without PXE/TFTP ● Generic image – iPXE-based, DHCP required ● Host image – iPXE-based, DHCP not required ● Full host image – SYSLINUX-based, DHCP required, OS specific
  19. 19. Discovery plugin ● Unknown host boots via DHCP/PXE – Becomes available in Foreman as a “Discovered Host” – Workflow remains the same – Discovery image is RHEL7/CentOS7-based ● Provision with as few as NO clicks – Automatic provisioning via rules on arbitrary facts: ● cpu_count < 8 → web server host group ● cpu_count >= 8 → db box host group
  20. 20. Discovery plugin ● Metal as a Service – PXE installation
  21. 21. Discovery plugin ● PXE-less (un)attended workflow (supports EFI)
  22. 22. Docker plugin ● Manage many docker hosts ● Deploy new containers easily & view their status, logs, etc ● Multiple registry support & integration with Katello ● https://github.com/theforeman/foreman-docker
  23. 23. Katello plugin ● Content Lifecycle Management – http://www.katello.org/ ● Sync RPM, Docker, and Puppet content ● Spin repositories with filters using Content Views
  24. 24. Katello plugin ● Manage through a lifecycle – Dev → QA → Production (Environments) ● Patch Management – Emergency Patches – Errata Reports ● And much more!
  25. 25. Hooks plugin ● Hooks – Triggered on actions: on action, do X ● host create/update/delete, build complete, etc. ● X could be anything – add to nagios – send an email ● Can be shell, python, ruby, etc. – More info: https://github.com/theforeman/foreman_hooks
  26. 26. Salt plugin ● Bootstrapping nodes ● Full interface to keys/autosign ● Define states, pillars via ext_node and ext_pillar ● Import reports (state.highstate results) and grains into Foreman ● API & CLI
  27. 27. Chef plugin ● Automatic bootstrapping of clients ● Import reports and attributes into Foreman ● Decomission nodes from Chef server when deleted in Foreman
  28. 28. Remote execution plugin ● Arbitrary commands on hosts ● Job Templates – Based on Foreman Templating engine – Input parameters ● Collected data available (Facts) ● Multiple providers architecture: – SSH (via Smart Proxies)
  29. 29. Writing Foreman Plugins ● Foreman: – Rails Engine – Extra Foreman API (plugin registration) – Distributed as a Ruby GEM – Template and HOWTO available ● Smart Proxy: – Sinatra app (REST API) – Small plugin registration API – Distributed as a Ruby GEM
  30. 30. What Next? ● Visit us http://theforeman.org/ ● If you do something cool with Foreman, let us know! ● Find us: – IRC: irc.freenode.net ● #theforeman ● #theforeman-dev – Mailing Lists on Google groups ● foreman-users ● foreman-dev
  31. 31. Demo: Foreman Plugins

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