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Mcollective introduction
Mcollective is an open source framework for server orchestration and parallel job execution. It provides asynchronous and event-driven communication between nodes using a message broker like RabbitMQ. Nodes can be targeted based on facts, classes, or other criteria. Plugins allow mcollective to manage configurations, run puppet, install packages, manage firewall rules, and more across large server fleets. It provides a scalable and decentralized alternative to SSH loops for orchestrating infrastructure changes and operations.
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Mcollective introduction
- 1. Infrastructure Coders Mcollective: Anintroduction to the marionette. Melbourne 06-06-2012
- 2. Javier Turégano #devops @setoide #opensource #it-management
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- 4. Why do weneed orchestration?
- 6. Example architecture Balancer Webapp Webapp Webapp Bdd
- 7. Use case: Addone webapp server Deploy Provision Apply config Last version new node as webserver Of App Add to Grant access Start LoadBalance to DB webserver r Activate In Prod! monitoring
- 8. Use case: Deploynew version Update Provision 1 Db schema New app Send traffic (addings) server Update Replace Test Db schema App servers (removals) In Prod!
- 10. Some options available Func Fabric Capistrano mcollective
- 11. Marionete Colective mcollective is a framework to build server orchestration or parallel job execution systems Created by R.I. Pienaar
- 12. Is it betterthan an SSH loop? Asynchronous/Event driven Scalable RIP Hostnames – use facts, classes. Modular (security, middleware, agents) Auto discovery De-centralized inventory
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- 14. Install middleware # apt-getinstall rabbitmq # rabbitmqctl add_user mcollective marionette # rabbitmqctl set_user_tags mcollective administrator # rabbitmqctl set_permissions -p / mcollective ".*" ".*" ".*"
- 15. Install mcollective In yourservers: # sudo apt-get install mcollective In your admnistrator's machines: # sudo apt-get install mcollective-client
- 16. Configure mcollective topicprefix =/topic/ main_collective = mcollective collectives = mcollective libdir = /usr/share/mcollective/plugins logfile = /var/log/mcollective.log loglevel = info daemonize = 0 # Plugins securityprovider = psk plugin.psk = unset connector = stomp plugin.stomp.host= master plugin.stomp.port= 6163 plugin.stomp.user= mcollective plugin.stomp.password= marionette # Facts factsource = facter
- 17. Advanced config Some interesting options: loglevel=debug #factsource = facter factsource = yaml plugin.yaml = /etc/mcollective/facts.yaml classesfile = /var/lib/puppet/state/classes.txt
- 18. Puppet modules Puppet modulesavailable. For RHEL: puppetlabs/rabbitmq puppetlabs/mcollective
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- 20. Finding nodes Targeting nodesusing facts and classes: # mc-ping # mc-find-hosts -F virtual=virtualbox # mc-find-hosts -F “memoryfree>100M” # mc-find-hosts -C mcollective -F operatingsystem="Ubuntu"
- 21. Inventory Powerful distributed inventorysystem: # mc-facts virtual # mc-facts processorcount # mc-inventory box01
- 22. Plugins You can get plugins from: http://projects.puppetlabs.com/projects/mcollective-plugins/wiki Facts-facter Filemgr Iptables Package Process Puppetd Service
- 23. Using the filemgrplugin # mco rpc filemgr status file=/tmp/filemgr
- 24. Using the iptablesplugin # mco iptables block 192.168.0.0 -C base -v Node01 # iptables -L -n -v
- 25. Using the packageplugin # mco package status vim-puppet -C base -v # mco package uninstall vim-puppet -C base -v
- 26. Executing puppet # mcopuppetd status -C base Edit puppet base class # mco puppetd runonce 1 -v -C base Check output in /var/log/syslog
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- 28. Images http://www.flickr.com/photos/ag2r/3783369226/ http://www.flickr.com/photos/31348155@N03/5584078173/ http://www.flickr.com/photos/61927538@N00/205992050/ http://www.flickr.com/photos/safari_vacation/5842069535