d-u@.service

[Unit]
Description=%p for %i etcd registration

# Requirements
Requires=etcd.service

# Dependency binding
BindsTo=u@%i.service

[Service]
Type=oneshot
RemainAfterExit=yes
Environment=URL=%i
ExecStart=/bin/bash -xc ' \
  ip=""; \
  while [ -z $ip ]; \
  do \
    container_name=`echo ${URL}_web_1 | sed "s/\.//g" | sed "s/-//g"`; \
    ip=`docker inspect --format \'{{.NetworkSettings.IPAddress}}\' $container_name`; \
    sleep 1; \
  done; \
  etcdctl --peers 172.17.42.1:4001 set /services/web/%i \'{"ip":"\'$ip\'", "port":"80"}\';'
ExecStop=-/usr/bin/etcdctl rm /services/web/%i