Pass Go file descriptors and connections between different OS processes.
fd
Package fd provides a simple API to pass file descriptors
between different OS processes.
It can be useful if you want to inherit network connections
from another process without closing them.
Example scenario:
- Running server receives a "let's upgrade" message
- Server opens a Unix domain socket for the "upgrade"
- Server starts a new copy of itself and passes Unix domain
socket name
- New copy starts reading data from the socket
- Server sends its state over the socket, also sending the number
of network connections to inherit, then it sends those connections
using fd.Put()
- New server copy reads the state and inherits connections using fd.Get(),
checks that everything is OK and writes an "OK" message to the socket
- Server receives "OK" message and kills itself
Documentation
fd on godoc.org