* fix: reduce reconnect redeploy and metrics load
Throttle node-online redeploy retries and lower the agent metric cadence so brief reconnect churn no longer fans out into repeated runtime syncs and backend connection pressure.
* docs: add follow-up implementation design notes
Document the planned flow upload batching work and the local remote-address toggle so the next changesets can implement them against an agreed design.
* docs: add implementation plan for max conn limit
* feat: add CLimiters support for websocket reporter
* feat: add max_conn field to user and forward models
* feat: implement max conn limiter dispatching
* feat: add maxConn to user and forward CRUD API
* feat: add max conn UI to user management and forward rules
* fix: load MaxConn in get forward record and add e2e contract test for max conn limit
- KCP: switch from fast3 to fast2 mode, enable FEC (10/3), enable
congestion control (nc=0) for automatic rate adaptation
- go-gost/x: support kcp.nc metadata to override mode-initialized
NoCongestion value in dialer and listener Init()
- Diagnosis: add udpPingViaRemoteNode, fix pingViaRemoteNode to
dispatch based on protocol, add Protocol field to federation
diagnose request structs
Replace read-then-subtract pattern in collectAndReport with atomic
swap-to-zero to eliminate race where AddTraffic increments counters
between snapshot and clearReportedTraffic, causing residual traffic
to accumulate indefinitely and inflate user flow counters.
Also add defensive check in processFlowItem to skip AddFlow when
forward no longer exists, and send DeleteService to clean up orphaned
agent services.
- Pass tunnel protocol through diagnosis work items
- Support protocol-specific ping (TCP/UDP/KCP) via remote nodes
- Add KCP probe support in websocket_reporter for chain hop testing
The metadata parser unconditionally assigned GetInt results (which
return 0 for missing keys) to all KCP config fields, overwriting
defaults like SndWnd=1024, RcvWnd=1024, StreamBuf=2097152 with 0.
KCP's WndSize only applies positive values, so snd_wnd=0 caused
the write path condition waitsnd < s.kcp.snd_wnd to never succeed,
effectively stalling throughput at ~10Mbps instead of 400Mbps+.
- Only apply metadata values when the key actually exists (IsExists check)
- Use Clone() instead of sharing the global DefaultConfig pointer
- Add Config.Clone() deep-copy method
When user traffic quota is exceeded, services are paused with
ForceClosePortConnections to kill active connections. However,
when admin resets quota and resumes services, the resume logic
was missing this cleanup, causing "address already in use" errors.
Changes:
- Add ForceClosePortConnections call in resumeServices (socket & api)
- Add ForceClosePortConnections call in resumeService (api single)
- Increase wait time from 100ms to 500ms for port release
Fixes#387
- Add NodeMetric/TunnelMetric/ServiceMonitor models and repository methods
- Implement metrics ingestion service with per-minute bucket aggregation
- Add health checker for node connectivity monitoring
- Wire node metrics from WebSocket SystemInfo messages
- Add tunnel metrics ingestion from flow upload endpoint
- Create monitoring REST API endpoints for nodes, tunnels, services
- Implement service monitor CRUD and execution (TCP/ICMP checks)
- Add MonitorPermission for non-admin access control
- Create frontend monitor page with node/tunnel/service views
- Add tunnel metrics ingestion from agent flow reports
- Include schema migration for tunnel_metric unique index
- Fix tunnel entry port conflict validation to use transaction
Entire-Checkpoint: 030821a7c8e3
- Update root AGENTS.md to commit 21008cc / tag 2.1.5-rc15
- Add CI workflows info (ci-build.yml, docker-build.yml, deploy-docs.yml)
- Add Repository Layer and Contract Tests to WHERE TO LOOK
- Add websocket_reporter to CODE MAP
- Add Go version conventions (1.24/1.23/1.22)
- Add PostgreSQL migration support note
- Update go-backend AGENTS.md with PostgreSQL support and contract tests
- Update go-gost AGENTS.md with CI build conventions
- Update vite-frontend AGENTS.md with component counts
- Update go-gost/x AGENTS.md with file counts and registry reference
- Update handler AGENTS.md with LOC estimates
sagit