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$ brew install go etcdctl
$ git clone https://github.com/coreos/fleet.git
$ cd fleet
$ ./build
$ mv bin/fleetctl /usr/local/bin/

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$ git clone https://github.com/CenturyLinkLabs/coreos-vagrant
$ cd coreos-vagrant/cluster
$ vagrant up --provision 

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$ fleetctl list-machines
MACHINE	IP	METADATA
09fd0a88...	10.0.2.15	-
77763947...	10.0.2.15	-
f31c383c...	10.0.2.15	-

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$ sudo gem install bundler fig2coreos

$ cat fig.yml
web:
  image: ctlc/wordpress
  ports:
    - 80:80
  environment:
    DB_USER: root
    DB_PASSWORD: qa1N76pWAri9

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$ fleetctl start db.1.service

$ fleetctl list-units
UNIT		LOAD	ACTIVE	SUB	DESC		MACHINE
db.1.service	loaded	active	running	Run db_1	9c008961.../10.0.2.15

$ fleetctl start web.1.service

$ fleetctl list-units
UNIT		LOAD	ACTIVE	SUB	DESC		MACHINE

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$ fleetctl start db-discovery.1.service
$ fleetctl start web-discovery.1.service

$ fleetctl list-units
UNIT			LOAD	ACTIVE	SUB	DESC		MACHINE
db-discovery.1.service	loaded	active	running	Announce db_1	9c008961.../10.0.2.15
db.1.service		loaded	active	running	Run db_1	9c008961.../10.0.2.15
web-discovery.1.service	loaded	active	running	Announce web_1	9c008961.../10.0.2.15
web.1.service		loaded	active	running	Run web_1	9c008961.../10.0.2.15

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$ cd ~/coreos-vagrant/cluster/

# find out which box is hosting your port 80
$ etcdctl get /services/web/web_1
{ "host": "core-03", "port": 80, "version": "52c7248a14" }

$ vagrant share core-03 --http 80
==> core-03: Detecting network information for machine...
    core-03: Local machine address: 192.168.65.2
    core-03: Local HTTP port: 80

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$ SERF_ID=$(docker run -d --name serf_1 -p 7946 -p 7373 ctlc/serf /run.sh) 

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$ wget https://dl.bintray.com/mitchellh/serf/0.5.0_linux_amd64.zip
$ unzip 0.5.0_linux_amd64.zip
$ sudo mv serf /usr/bin/
$ serf agent &
$ serf members
packer-virtualbox    10.0.2.15:7946    alive    

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$ serf join $(docker port $SERF_ID 7946)
Successfully joined cluster by contacting 1 nodes.
$ serf members
packer-virtualbox    10.0.2.15:7946    alive    
b62e43c286c8    172.17.0.76:7946    alive    serf-agent