CoreOS (Mesos + Marathon + Zookeeper)

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[Unit]
Description=MesosMaster
After=docker.service
Requires=docker.service

[Service]
Restart=on-failure
RestartSec=20
TimeoutStartSec=0
ExecStartPre=-/usr/bin/docker kill mesos_master
ExecStartPre=-/usr/bin/docker rm mesos_master
ExecStartPre=/usr/bin/docker pull mesosphere/mesos-master:0.20.1
ExecStart=/usr/bin/sh -c "/usr/bin/docker run --name=mesos_master --privileged --net=host mesosphere/mesos-master:0.20.1 --ip=$(/usr/bin/ip -o -4 addr list enp3s0 | grep global | awk \'{print $4}\' | cut -d/ -f1) --zk=zk://zookeeper.local:2181/mesos --work_dir=/var/lib/mesos/master --quorum=1"
ExecStop=/usr/bin/docker stop mesos_master

[Install]
WantedBy=multi-user.target

[X-Fleet]
Conflicts=mesos-master@*.service
MachineMetadata=role=services