Docker Swarm Introduction

Docker Swarm breakout session at DockerCon EU.

Transcript

1. Docker Swarm!
   @aluzzardi - @vieux!
   

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2. Demo!
   us-west! us-east!
   Docker!
   CLI!
   Docker!
   CLI!
   Docker!
   CLI!
   =! RAM: 2GB!
   CPU: 1core!
   

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3. Demo!
   us-west! us-east!
   =! RAM: 2GB!
   CPU: 1core!
   Docker!
   CLI!
   Docker!
   CLI!
   

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4. Setup!
   •  Create a cluster:!
   $ swarm create
   •  Add nodes to a cluster:!
   $ swarm join --token= --addr=
   •  List nodes in a cluster!
   $ swarm list --token=
   •  Start Swarm!
   $ swarm manage --token= --addr=
   !
   !
   

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5. Resource Management!
   •  Memory!
   " "
   $ docker run -m 1g …
   •  CPU!
   " "
   $ docker run -c 1 …
   •  Ports!
   " "
   $ docker run -p 80:80 …
   •  More to come, ex: network interfaces!
   !
   !
   !
   

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6. Constraints!
   •  Standard constraints induced from docker info!
   docker run -e “constraint:operatingsystem=fedora” …
   " "
   docker run -e “constraint:storagedriver=aufs” …
   •  Custom constraints with host labels!
   " "
   docker -d --label “region=us-east”
   " "
   docker run -e “constraint:region=us-east” …
   •  Pin a container to a specific host!
   " "
   docker run –e “constraint:node=ubuntu-2” …
   •  More to come, ex: affinity!
   !
   

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7. Rescheduling!
   •  Rescheduling policies; similar to `--restart`!
   •  Pending status!
   !
   !
   !
   

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8. Swarm scheduler!
   2 steps:!
   !
   •  1- Apply filters to exclude nodes!
   " "
   - ports!
   " "
   - labels!
   " "
   - health!
   •  2- Use a strategy to pick the best node!
   " "
   - bin packing!
   " "
   - random!
   !
   !
   !
   !
   Contributions are welcome ☺
   :
   !
   

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9. http://github.com/docker/swarm!
   @aluzzardi - @vieux!
   Thank You.!
   

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