modifying the docker host's /etc/hosts file with the location of a private docker-registry so we don't need to restart the docker daemon (and force all the containers to restart0

docker.sh

# run from a coreos fleet file; change as you see fit
# NOTE: this shares the /etc folder with docker; ugh!  
# using multiple -v doesn't seem to work (as consul-template 
# does atomic writes, which requires writing a tmp file 
# then moving it).
docker run --rm \
  --name docker-registry \
  -e SERVICE_IGNORE=1 \
  -v /etc:/configs \
  skippy/consul-template \
    -consul ${COREOS_PRIVATE_IPV4}:8500 \
    -template "/configs/hosts.ctmpl:/configs/hosts"

hosts.ctmpl

# save at /etc/hosts.ctmpl
{{range service "private-registry"}}
{{.Address}}	{{.Name}}.service.consul	{{.Name}}.service.consul{{end}}