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Docker Engine
From one to hundres nodes
Andrea Tosatto - @_hilbert_ 07/07/2016 - 1st Docker Rome Meetup
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Docker Engine
From one to hundres nodes
Andrea Tosatto - @_hilbert_ 07/07/2016 - 1st Docker Rome Meetup
An introduction to the new
Docker Engine “Swarm Mode”
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Docker Engine
From one to hundres nodes
Andrea Tosatto - @_hilbert_ 07/07/2016 - 1st Docker Rome Meetup
Why the new Docker Engine
“Swarm Mode” is so cool
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$ whoami
> Andrea Tosatto
§ System and Platform Operations
@
http://www.purpleocean.it/
§ OpenSource Code Monkey
@
https://github.com/opsfactory
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$ whoami
> Andrea Tosatto
§ https://twitter.com/_hilbert_
§ https://github.com/atosatto
§ http://www.meetup.com/Milano-DevOps
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# outline
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$ history
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# orchestration without orchestrators
$ cat docker-up.sh
for i in {0..10}
do
ssh dck-dev$(printf %02d $i) \
docker run --name myapp -d myapp:latest
done
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# orchestration without orchestrators
$ cat playbook.yml
---
- name: "Provision myapp"
hosts: dckdev
tasks:
- name: "run myapp with docker"
docker:
name: myapp
image: myapp:latest
state: started
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# orchestrators without orchestration
github.com/toscanini/maestro
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github.com/spotify/helios
# orchestrators without orchestration
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# the ecosystem’s big-bang
github.com/coreos/fleet
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# the ecosystem’s big-bang
github.com/rancher/rancher
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# the ecosystem’s big-bang
github.com/mesosphere/marathon
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# the ecosystem’s big-bang
github.com/kubernetes/kubernetes
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github.com/hashicorp/nomad
# the ecosystem’s big-bang
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# the ecosystem’s big-bang
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$ docker
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# docker swarm
github.com/docker/swarm
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# docker swarm
# Run the consul to act as swarm key/value backend
$ docker run -d -p 8500:8500 --name=consul progrium/consul -server -bootstrap
# Initialize the first swarm manager
$ docker run -d -p 4000:4000 swarm manage -H :4000 --replication --advertise :
4000 consul://:8500
# Initialize another swarm manager
$ docker run -d -p 4000:4000 swarm manage -H :4000 --replication --advertise :
4000 consul://:8500
# Join a worker node to the cluster
$ docker run -d swarm join --advertise=:2375 consul://:8500
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# docker swarm
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# docker swarm
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# so then?!
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$ docker swarm
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# docker “swarm mode”
github.com/docker/swarmkit
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# docker “swarm mode”
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# docker “swarm mode”
# init a new swarm cluster
$ docker swarm init
# join the node as a manager
$ docker swarm join --manager :2377
# join the node as worker
$ docker swarm join :2377
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# docker “swarm mode”
# accept a new joining manager
$ docker node accept
# list cluster nodes
$ docker node ls
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# docker “swarm mode”
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# docker “swarm mode”
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$ docker service
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# docker “swarm mode”
# cluster level overlay networking
$ docker network create -d overlay
# new clustered application creation
$ docker service create --name --network
-p ![]()
# listing all the application in the cluster
$ docker service ls
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# docker “swarm mode”
# swarmkit’s tasks !!!!! :-)
$ docker service tasks
# up&down scaling
$ docker service update --replicas 30
# build-in routing mesh
$ curl http://:/
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# what’s next?
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# what’s next?
§ docker 1.12 is still rc3
$ kubernetes 1.3 has been released with improved scaling and
autoscaling support
http://blog.kubernetes.io/2016/07/kubernetes-1.3-bridging-cloud-native-and-enterprise-
workloads.html
§ hashicorp is pushing nomad claiming it can scale millions of
containers on 5k hosts under 5 minutes
https://www.hashicorp.com/c1m.html
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# what’s next?
"We believe that we can provide a better user
experience by integrating orchestration
features into the platform itself"
Mike Goelzer, Product lead for Docker Core
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# what’s next?
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# thank you
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# demo
https://asciinema.org/a/6xvacwh5mura4zw924as9rabv