On Linux the guest kernel's LOCAL routing table routes all
127.0.0.0/8 to the guest's own loopback interface (priority 0,
checked before any main-table route), so TSI never sees
connections to the per-bottle loopback alias — the fix_guest_
loopback_routing approach confirmed this at the kernel level.
Use the per-bottle docker bridge gateway (192.168.N.1) instead.
It is not a loopback address, so the guest routes it via eth0
and TSI intercepts it normally. The TSI allowlist remains a
/32 that is distinct from the container IP (192.168.N.2), so
direct bypass to egress:9099 is still blocked by TSI.
Changes:
- Add _proxy_host() helper: returns bundle_gateway on Linux,
loopback alias on macOS
- Thread proxy_host through _start_bundle, _discover_urls,
_launch_vm, and _bundle_launch_spec (publish_host_ip)
- Remove _fix_guest_loopback_routing (no longer needed)
- Relax proxy-URL assertion in the integration test to accept
any http://IP:port (with a comment explaining the difference)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
didericis
8f9005582b