Docker service won't stay alive

I have some problem on my ubuntu 14.04. When i do

$ sudo service docker start 
docker start/running, process 30447

And after

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  • $ sudo service docker status
    docker stop/waiting

    I tried to puge/autoclean and reinstall docker-engine that always have this problem

    Thank you 🙂

    My /var/log/upstart/docker.log

    time="2016-04-28T14:21:36.327412687+02:00" level=info msg="previous instance of containerd still alive (2099)"
    time="2016-04-28T14:21:36.427058459+02:00" level=info msg="[graphdriver] using prior storage driver \"aufs\""
    time="2016-04-28T14:21:36.436012041+02:00" level=info msg="Graph migration to content-addressability took 0.00 seconds"
    time="2016-04-28T14:21:36.445407999+02:00" level=info msg="Firewalld running: false"
    time="2016-04-28T14:21:36.463832409+02:00" level=fatal msg="Error starting daemon: Error initializing network controller: error obtaining controller instance: failed to create NAT chain: Iptables not found"

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