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Docker Swarm Introduction

Victor Vieux
December 05, 2014

Docker Swarm Introduction

Docker Swarm breakout session at DockerCon EU.

Victor Vieux

December 05, 2014
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  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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