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Ansible & Cobbler

Ansible & Cobbler. Triangle Devops, Feb 2013. About Me. NCSU 2001 IBM / Adaptec, Integrian Red Hat Puppet Labs, WebAssign, rPath, Cisco. Ansible & Cobbler, In Context. OS Provisioning. Red Hat Satellite. cobbler. Task Exec. virt-factory. func. ansible. OS Config. puppet. chef.

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Ansible & Cobbler

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  1. Ansible & Cobbler • Triangle Devops, Feb 2013

  2. About Me • NCSU 2001 • IBM / Adaptec, Integrian • Red Hat • Puppet Labs, WebAssign, rPath, Cisco

  3. Ansible & Cobbler, In Context OS Provisioning Red Hat Satellite cobbler Task Exec virt-factory func ansible OS Config puppet chef cfengine capistrano/fabric Deployment

  4. Cobbler • Before configuration, there must be OS • PXE tree management • DHCP, DNS • Yum Repos • Power • Lightweight CMDB

  5. Some Cobbler Users • Top 500 Supercomputers • DNS root serves for .com and .net • Modern Warfare • Render farms • Wall Street

  6. Some Commands • cobbler import --name=Fedora18 --path=/mnt/dvd • cobbler system add --name=foo --mac= AA:BB:CC:DD:EE:FF --ip=2.2.2.2 --profile= Fedora18-x86_64 • cobbler system edit --name=foo --netboot-enabled=1 • cobbler system reboot --name=foo

  7. Ansible • A year old today. • 1100+ followers on github • Top 10 New OSS Projects of 2012

  8. Several Tools In One • Configuration (cfengine, Chef, Puppet) • Deployment (Capistrano, Fabric) • Ad-Hoc Tasks (Func) • Multi-Tier Orchestration (Juju, sort of)

  9. Properties • Minimal learning curve, auditability • No bootstrapping • No DAG ordering, Fails Fast • No agents (other than sshd) - 0 resource consumption when not in use • No server • No additional PKI • Modules in any language • YAML, not code • SSH by default • Strong multi-tier solution

  10. Architecture

  11. Focus: Orchestration • Rolling Updates • Multi-tier: Web Tier, DB Tier, Content Tier • Monitoring, Outage Windows • Load Balancing, Pools • Email, REST, Logging, Interaction, etc

  12. Inventory File [webservers] asdf.example.com [dbservers] jkl.example.com mnop.example.com

  13. External Inventory • Cobbler • OpenStack • EC2 or Eucalyptus Cloud • Etc

  14. Basic Task Example • ansible durham -m ping • ansible webservers -m service -a “name=httpd state=restarted” --limit durham

  15. - hosts: all user: mpdehaan sudo: True tasks: - name: ntp should be installed yum: name=ntp state=present - name: template ntp.conf template: src=ntp.conf.j2 dest=/etc/ntp.conf notify: - restart ntpd - name: ntp should be running/enabled service: name=ntp state=running enabled=yes handlers: - name: restart ntpd service: name=ntpd state=restarted

  16. __________________________________ < TASK: [write app configuration] > --------------------------------- \ ^__^ \ (oo)\_______ (__)\ )\/\ ||----w | || || ok: [127.0.0.1]

  17. Fireball Mode

  18. Pull Mode

  19. API import ansible.runner import sys # construct the ansible runner and execute on all hosts results = ansible.runner.Runner(     pattern='*', forks=10,     module_name='command', module_args='/usr/bin/uptime', ).run()

  20. Questions?@laserllamamichael.dehaan@gmail.comcobbler.github.comansible.ccQuestions?@laserllamamichael.dehaan@gmail.comcobbler.github.comansible.cc

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