Run Cisco CML containerized IOL images (e.g. iol-xe/iol-xe:17-18-02,
driven by virl.lab/cmd/iol-runner) as GNS3 Docker router nodes:
- VendorDockerVM: generic GNS3_UNIX_SOCKET_NIO/GNS3_UNIX_SOCKET_DIR knobs
wiring adapters through AF_UNIX datagram socket pairs
(add_nio_unix cNN.sock sNN.sock) instead of TAP + move_to_ns; node
creation fails if the socket dir is not a persisted volume.
- IOLDockerVM (GNS3_IOL_RUNNER=1): forces skip-init + unix-socket NIO +
/config,/tmp volumes, writes iol-config.json on every start (num-eth
tracks adapters, runner drops to the server uid/gid so the sockets are
reachable), pre-creates tmp/run, cleans stale sockets after unclean
kills, and makes reload a graceful stop + full start (NVRAM flush +
rewiring). Console stays telnet on PID 1 stdio.
- Manager selects the node class from console_type or GNS3_* environment
markers (create-time, like console_type).
- Image-free tests (25) and feature documentation.
