4b6cb3db2c
## Issue Addressed
CI is plagued by `AddrAlreadyInUse` failures, which are caused by race conditions in allocating free ports.
This PR removes all usages of the `unused_port` crate for Lighthouse's HTTP API, in favour of passing `:0` as the listen address. As a result, the listen address isn't known ahead of time and must be read from the listening socket after it binds. This requires tying some self-referential knots, which is a little disruptive, but hopefully doesn't clash too much with Deneb 🤞
There are still a few usages of `unused_tcp4_port` left in cases where we start external processes, like the `watch` Postgres DB, Anvil, Geth, Nethermind, etc. Removing these usages is non-trivial because it's hard to read the port back from an external process after starting it with `--port 0`. We might be able to do something on Linux where we read from `/proc/`, but I'll leave that for future work.
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.. | ||
beacon_chain | ||
beacon_processor | ||
builder_client | ||
client | ||
eth1 | ||
execution_layer | ||
genesis | ||
http_api | ||
http_metrics | ||
lighthouse_network | ||
network | ||
operation_pool | ||
src | ||
store | ||
tests | ||
timer | ||
Cargo.toml |