hmm, I think the problem is that the LB web container didn't reload uwsgi when I put the old pgbouncer container into maintenance mode.  this template block in /etc/consul-template-uwsgi.conf looks suspect since it has no command/exec setting:

```
template {
    source = "/code/listenbrainz/consul_config.py.ctmpl"
    destination = "/code/listenbrainz/listenbrainz/config.py"
}
```