code: func (p *Process) installDB() error {
  	logger := p.Logger.New("fn", "installDB", "data_dir", p.DataDir)
  	logger.Debug("starting installDB")
  
  	// Ignore errors, since the db could be already initialized
  	p.runCmd(exec.Command(
  		filepath.Join(p.BinDir, "mysql_install_db"),
  		"--defaults-extra-file="+p.ConfigPath(),
  	))
  
  	return nil
  }
docs: // installDB initializes the data directory for a new database.