# Connect to host database

1. Create new database user with password for docker.
2. Configure `postgresql.conf` to listen for connection from docker network which usually is `172.17.0.0/16`. The file's usually located at `/usr/local/var/postgres/postgresql.conf` for Mac OS X.

  Example, add this entry into `postgresql.conf` file.

  ```
  listen_addresses = '172.17.0.0/16, localhost'
  ```
  
3. Configure `pg_hba.conf` to trust, password or your prefer connection from docker. The file's usually located at `/usr/local/var/postgres/pg_hba.conf` in Mac OS X.

  Example, add this entry into `pg_hba.conf` file.

  ```
  host    all             all             172.17.0.1/16           trust
  ```

4. Run docker with `--add-host` command.

  ```
  docker run -it --rm -v $PWD:$PWD -w $PWD --add-host=docker:(ipconfig getifaddr en0) your-image
  ```
  
5. Then you can connect to host by hostname `docker`.