The YAML configuration file provides a way to list databases and replicas that Litestream should manage. In addition, there are global variables that can be applied to all replicas. The default path for the configuration file is /etc/litestream.yml. Variable expansion By default, Litestream will perform environment variable expansion within the config file before reading it. Any references to $VAR or ${VAR} formatted variables will be replaced with their environment variable values.