Spotlight on CoreOS

A quick overview of CoreOS, and some quick highlights of what it can do.

Transcript

1. Spotlight on CoreOS
   martin@mbs3.org
   

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2. The Datacenter as a Computer
   - Focus on applications
   - Design for HW failure
   - No maintenance windows
   - Commodity hardware
   - Warehouse scale
   computer
   

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3. CoreOS
   - Micro Gentoo/Chrome (Kernel +
   Docker/LXC/nspawn/etc)
   - No package manager, just run in containers
   - Intended for HA clusters
   - Updates are applied automagically
   - SystemD (incl. managing containers)
   

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4. Etcd
   - Distributed key-value store
   - RESTful (HTTP + JSON)
   - Service discovery via announcements
   - Similar to Consul or Zookeeper
   

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5. Fleet
   - Cluster-level service management
   - Manage etcd and systemd as a single init sys
   - Schedule a specific number of containers,
   reschedule units on failure, placement rules
   

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6. Demos!
   - 3 node cluster with vagrant
   - Demo dillinger.io (online markdown editor)
   vagrant ssh core-01
   fleetctl machine-list
   fleetctl list-units
   fleetctl submit dillinger.service
   fleetctl start dillinger.service
   fleetctl journal -follow dillinger.service
   https://github.com/coreos/coreos-vagrant
   http://lukebond.ghost.io/getting-started-with-coreos-
   and-docker-using-vagrant/
   

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