ec2-ifup@.service

[Unit]
Description=Bring up %i if configured by ec2net.hotplug

# BindsTo marks this service as stopped when the device disappears, and also
# kills children in the control group such as dhclient (though, the ifdown
# run by udev would take care of that as well).
BindsTo=sys-subsystem-net-devices-%i.device

# Don't run when network.service is still starting, avoids trying to bring up
# interfaces that network.service is already bringing up.
After=network.service

# Don't run if network.service has already configured the interface.
ConditionPathExists=!/var/run/dhclient-%i.pid

# Don't run if elastic-network-interfaces hasn't written the config yet.
# There will be another udev add event after it's configured.
ConditionPathExists=/etc/sysconfig/network-scripts/ifcfg-%i

[Service]
ExecStart=/sbin/ifup %i
RemainAfterExit=true