Answers the last open question in #392: DNS from inside a nested
container was not a phantom, but it was also not a DNS problem. Public
resolution fails there by design — everything egresses through the
proxy — and the actual breakage was two missing pieces:
- The proxy URL names `bot-bottle-gateway`, which resolves only through
the bottle's own /etc/hosts. Containers got their own hosts file, so
they failed at "Could not resolve proxy", which reads like broken DNS.
base_hosts_file propagates the bottle's entries.
- The gateway TLS-intercepts, so a container that does not trust the
bottle's CA bundle fails with "unable to get local issuer
certificate". The bundle is now mounted read-only and the usual env
vars point at it, which covers curl, wget, python, and node without
distro-specific trust commands.
Verified on the macOS host by reproducing each failure and confirming
that these three conditions applied by hand produced HTTP 200 from
inside a nested container. podman already forwards the proxy env, so
that needed nothing.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
didericis
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