[Unit]
Description=Register memcached %i
BindsTo=memcached@%i.service
After=memcached@%i.service

[Service]
TimeoutStartSec=0
RestartSec=1
Restart=always
ExecStartPre=-/usr/bin/etcdctl rm /services/memcached/%i
ExecStart=/usr/bin/bash -c ' \
  while true; do \
    sleep 5; \
    FLANNELIP=`docker inspect memcached-%i | jq -r .[].NetworkSettings.IPAddress`; \
    etcdctl update --ttl 8 /services/memcached/%i $FLANNELIP || \
    etcdctl set --ttl 8 /services/memcached/%i $FLANNELIP; \
  done'
ExecStop=-/usr/bin/etcdctl rm /services/memcached/%i'

[X-Fleet]
MachineOf=memcached@%i.service