ip_echo_preflight.py: reimplements Solana ip_echo client protocol in
Python. Verifies UDP port reachability before snapshot download, called
from entrypoint.py. Prevents wasting hours on a snapshot only to
crash-loop on port reachability.
docs/postmortem-ashburn-relay-outbound.md: root cause analysis of the
firewalld nftables FORWARD chain blocking outbound relay traffic.
docs/ashburn-relay-checklist.md: 7-layer verification checklist for
relay path debugging.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Entrypoint changes:
- Always require full + incremental before starting (retry until found)
- Check incremental freshness against convergence threshold (500 slots)
- Gap monitor thread: if validator falls >5000 slots behind for 3
consecutive checks, graceful stop + restart with fresh incremental
- cmd_serve is now a loop: download → run → monitor → leapfrog → repeat
- --no-snapshot-fetch moved to common args (both RPC and validator modes)
- --maximum-full-snapshots-to-retain default 1 (validator deletes
downloaded full after generating its own)
- SNAPSHOT_MAX_AGE_SLOTS default 100000 (one full snapshot generation)
snapshot_download.py refactoring:
- Extract _discover_and_benchmark() and _rolling_incremental_download()
as shared helpers
- Restore download_incremental_for_slot() using shared helpers (downloads
only an incremental for an existing full snapshot)
- download_best_snapshot() uses shared helpers, downloads full then
incremental as separate operations
The leapfrog cycle: validator generates full snapshots at standard 100k
block height intervals (same slots as the rest of the network). When the
gap monitor triggers, the entrypoint loops back to maybe_download_snapshot
which finds the validator's local full, downloads a fresh network
incremental (generated every ~40s, converges within the ~11hr full
generation window), and restarts.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Without a bound, the loop runs forever if sources never serve an
incremental close enough to head (e.g. full snapshot base slot is
too old). After 30 minutes, proceed with the best incremental
available or none.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
After the full snapshot downloads, continuously re-probe all fast sources
for newer incrementals until the best available is within convergence_slots
(default 500) of head. Each iteration finds the highest-slot incremental
matching our full snapshot's base slot, downloads it (replacing any previous),
and checks the gap to mainnet head.
- Extract probe_incremental() from inline re-probe code
- Add convergence_slots param to download_best_snapshot() (default 500)
- Add --convergence-slots CLI arg
- Pass SNAPSHOT_CONVERGENCE_SLOTS env var from entrypoint.py
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
The container entrypoint (entrypoint.py) handles snapshot download
internally via aria2c. Ansible no longer needs to scale-to-0, download,
scale-to-1 — it just deploys and lets the container manage startup.
- biscayne-redeploy.yml: remove snapshot download section, simplify to
teardown → wipe → deploy → verify
- biscayne-sync-tools.yml: new playbook to sync laconic-so and
agave-stack repos on biscayne, with separate branch controls
- snapshot_download.py: re-probe for fresh incremental after full
snapshot download completes (old incremental is stale by then)
- Switch laconic_so_branch to fix/kind-mount-propagation (has
hostNetwork translation code)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
A. F. Dudley