Traefik now also listens on `extra`, whose name comes from TRAEFIK_EXTRA_NETWORK
and defaults to rpc_extra (matching the rpc_chains convention). It is not
`external: true`, so compose creates it; hosts that never use it just get an
empty bridge.
Why: anything that wants a traefik route currently has to sit on `chains`, which
on a typical host means 26 containers including unauthenticated redis:6379,
traefik:8080 (--api.insecure=true) and several unauthenticated :8545 endpoints.
A public site accepting anonymous uploads does not belong there. With this it
can be routed from an isolated network that only traefik bridges into.
Validated with `docker compose config` against a real host .env: unset ->
rpc_extra, TRAEFIK_EXTRA_NETWORK=vientiane_net -> vientiane_net, traefik on
[chains, extra] in both.
Operational note: changing traefik's network list means the NEXT rpc-update on a
host recreates the traefik container, briefly interrupting all HTTP/HTTPS routing
on that host, RPC endpoints included. Nothing pulls /root/rpc on its own, so this
lands host by host and should ride the serving gate.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KjqejYycVyVvrxV9aTDhgX
