lb.cluster.conntrack — org.clojars.pgdad/clj-ebpf-lb 0.10.5

Connection tracking synchronization for seamless failover.

This namespace implements connection state replication across cluster nodes:

• Owner node tracks connections where first packet arrived
• Shadow entries stored on non-owner nodes for failover
• On node failure, shadow entries promoted to active BPF entries

Sync Strategy:

• Batch updates for efficiency (every 100ms or 100 connections)
• Delta sync: only changed entries since last gossip
• Full sync on node join via push-pull
• Conservative: shadow entries don't affect routing until failover

create-conntrack-provider clj

(create-conntrack-provider)

Create a conntrack state provider for cluster sync.

default-config clj

Default conntrack sync configuration.

force-full-sync! clj

(force-full-sync!)

Force a full sync of all local connections to the cluster.

on-connection-created! clj

(on-connection-created! conn)

Called when a new connection is created locally. Queues the connection for sync to cluster.

on-connection-deleted! clj

(on-connection-deleted! conn)

Called when a connection is deleted locally. Queues the deletion for sync to cluster.

promote-all-shadows! clj

(promote-all-shadows!)

Manually promote all shadow connections to active BPF entries. Use with caution - may cause duplicate connections.

running? clj

(running?)

Check if conntrack sync is running.

start! clj

(start! conntrack-map & {:as opts})

Start conntrack synchronization.

Args:

• conntrack-map: BPF conntrack map reference
• opts: Configuration options (see default-config)

stop! clj

(stop!)

Stop conntrack synchronization.

sync-stats clj

(sync-stats)

Get conntrack sync statistics.