Environment variables reference

Note: Environment variables are no longer the recommended method for connecting to linked services. Instead, you should use the link name (by default, the name of the linked service) as the hostname to connect to. See the fig.yml documentation for details.

Fig uses Docker links to expose services' containers to one another. Each linked container injects a set of environment variables, each of which begins with the uppercase name of the container.

To see what environment variables are available to a service, run fig run SERVICE env.

Full URL, e.g. DB_PORT=tcp://

Full URL, e.g. DB_PORT_5432_TCP=tcp://

Container's IP address, e.g. DB_PORT_5432_TCP_ADDR=

Exposed port number, e.g. DB_PORT_5432_TCP_PORT=5432

Protocol (tcp or udp), e.g. DB_PORT_5432_TCP_PROTO=tcp

Fully qualified container name, e.g. DB_1_NAME=/myapp_web_1/myapp_db_1