obmp-docker/gobgp/README.md

GoBGP global Internet table feed (roadmap E1)

This service runs GoBGP to pull the full real Internet routing table (IPv4 ~1M + IPv6 ~200k routes) from Łukasz Bromirski's lab route server (AS57355) and BMP-export every received route to the OpenBMP collector. The table lands in PostgreSQL ip_rib as a monitored peer.

• Image: jauderho/gobgp:v4.5.0 — community-maintained, multi-arch, tracks upstream GoBGP releases (rebuilt within an hour of each release). Chosen because the official osrg/gobgp image is published less consistently.
• Local AS: 65001 (private). Router-id: 10.40.40.250.
• The session is receive-only — we announce nothing to the route server.

Files

File	Purpose
gobgpd.conf	GoBGP daemon config (global, neighbors, BMP export). TOML.
mrt-refresh.sh	MRT full-table fallback loader (cron-driven).
mrt/	Created at runtime; cached RouteViews RIB dumps.

Bring it up

The gobgp service is defined in the repo docker-compose.yml, on the same default compose network as collector, and depends_on it.

docker compose config            # validate compose is well-formed
docker compose up -d gobgp       # start (collector must be running)
docker logs -f obmp-gobgp

The live BGP cutover is performed by a human — bringing the container up is all that is needed; GoBGP initiates the eBGP-multihop sessions automatically.

Confirm the session and route count

# session state — expect both neighbors in "Establ"
docker exec obmp-gobgp gobgp neighbor

# received route counts — expect ~1M IPv4, ~200k IPv6
docker exec obmp-gobgp gobgp global rib summary -a ipv4
docker exec obmp-gobgp gobgp global rib summary -a ipv6

How the data appears in OpenBMP

GoBGP opens an outbound BMP session to obmp-collector:5000 with route-monitoring-policy = "pre-policy" (Adj-RIB-In, pre import-policy — consistent with the rest of the OpenBMP fleet).

In OpenBMP / PostgreSQL the source is identified by the BMP router, which GoBGP reports using its router-id (10.40.40.250) and local-as (65001):

• routers table — a row with ip_address / name derived from 10.40.40.250.
• bgp_peers table — two peer rows for 85.232.240.179 and 2001:1a68:2c:2::179, both peer_as = 57355.
• ip_rib — every prefix from the global table, attributed to those peers.

To find it in Grafana/SQL, filter on peer_as = 57355 or the router-id above.

MRT fallback

AS57355 is a single volunteer-run host with no SLA — it can and does go away. mrt-refresh.sh keeps the global table in ip_rib warm when the live feed is down:

1. If any AS57355 session is Established, the script does nothing — the live feed is authoritative and must not be overwritten with a stale dump.
2. Otherwise it downloads the latest full RIB dump from RouteViews (https://archive.routeviews.org/route-views/bgpdata/YYYY.MM/RIBS/rib.YYYYMMDD.HHMM.bz2, published every 2 hours UTC) and runs gobgp mrt inject global <file>, which installs every prefix into the running daemon. BMP export to the collector then happens automatically.

The script is idempotent (re-uses an already-downloaded dump), guarded by a flock against overlapping runs, and prunes to the 4 most recent dumps.

Schedule it (host crontab, 2-hour cadence)

0 */2 * * * docker exec obmp-gobgp /config/mrt-refresh.sh >> /var/log/gobgp-mrt.log 2>&1

Run it once manually to verify:

docker exec obmp-gobgp /config/mrt-refresh.sh

Caveats

• No SLA. AS57355 is a volunteer lab route server; treat the live feed as best-effort and rely on the MRT fallback for continuity.
• eBGP-multihop TTL is set to 64 — the route server is many hops away.
• A full table is ~1M+ prefixes; expect a noticeable load spike in the collector and PostgreSQL when the session first establishes or an MRT dump is injected.