CoreOS (Mesos + Marathon + Zookeeper)

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[Unit]
Description=Zookeeper service
After=docker-flannel.service
ConditionFileNotEmpty=/etc/zookeeper-release
ConditionFileNotEmpty=/etc/zookeeper-environment

[Service]
EnvironmentFile=/etc/environment
EnvironmentFile=/etc/zookeeper-release
EnvironmentFile=/etc/zookeeper-environment
ExecStartPre=/usr/bin/mkdir -p /data/zookeeper
ExecStart=/bin/bash -xc "exec /usr/bin/docker run --name zookeeper --hostname zookeeper-$(hostname) --publish 2181:2181 --publish 2888:2888 --publish 3888:3888 --publish 11099:10099 --volume /data/zookeeper:/data/zookeeper $( cat /etc/zookeeper-environment | sed -e 's/^/-e /' )quay.io/signalfuse/zookeeper:${ZOOKEEPER_RELEASE}"
ExecStop=/usr/bin/docker stop zookeeper
ExecStop=/usr/bin/docker rm zookeeper
Restart=on-failure
TimeoutSec=300
RestartSec=10

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