463 lines
15 KiB
Markdown
463 lines
15 KiB
Markdown
# Go 车辆接入上下文记忆
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更新时间：2026-07-03
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这份文档用于在 Codex 上下文重载后快速恢复项目状态。更完整的运行排查步骤见：
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- `docs/ops/vehicle-ingest-runbook.md`
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- `docs/architecture/production-data-plane-inventory.md`
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## 当前目标
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Go 版本车辆数据接入链路已经作为生产主链路运行在 ECS `115.29.187.205`。
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核心目标：
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1. 高性能可靠接收 GB32960、JT808、宇通 MQTT。
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2. 协议解析后先写 NATS，再桥接 Kafka。
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3. Kafka raw 供 TDengine 历史、Redis 实时、MySQL 当前态/统计消费。
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4. 尽量避免 Java 老链路、Xinda 相关链路和重复存储。
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5. 解析字段只投影一次，避免 TDengine/Redis/MySQL 各自重复 flatten。
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6. 新长期目标：朝 10W 车辆生产稳定运行优化，容量基线见 `docs/ops/100k-capacity-baseline.md`。
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## 服务和端口
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ECS：`115.29.187.205`
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| 服务 | systemd | 端口 | 作用 |
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| --- | --- | --- | --- |
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| Gateway | `lingniu-go-gateway.service` | `808`、`32960`、`20211` | JT808、GB32960、宇通 MQTT 接入和解析 |
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| NATS fast writer | `lingniu-go-nats-fast-writer.service` | 健康端口随 env | NATS 快速写 TDengine/Redis |
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| NATS Kafka bridge | `lingniu-go-nats-kafka-bridge.service` | `20214` | NATS 到 Kafka |
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| History writer | `lingniu-go-history-writer.service` | `20212` | Kafka raw 写 TDengine |
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| Stat writer | `lingniu-go-stat-writer.service` | `20213` | Kafka raw 写每日里程 |
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| Realtime API | `lingniu-go-realtime-api.service` | `20200` | Redis/MySQL 投影和 HTTP API |
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业务端口：
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- JT808：`0.0.0.0:808`
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- GB32960：`0.0.0.0:32960`
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- Swagger/API：`http://115.29.187.205:20200/swagger-ui/index.html`
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## 部署路径
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Go 服务使用 systemd 裸机部署，不使用 Docker。
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```bash
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/opt/lingniu-go-native/current
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/opt/lingniu-go-native/releases/*
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/opt/lingniu-go-native/env/*.env
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```
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最近 release：
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```text
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/opt/lingniu-go-native/releases/100k-hardening-20260703175730
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/opt/lingniu-go-native/releases/parsed-fields-once-20260703163821
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```
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服务重启：
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```bash
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systemctl restart lingniu-go-gateway.service
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systemctl restart lingniu-go-nats-fast-writer.service
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systemctl restart lingniu-go-nats-kafka-bridge.service
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systemctl restart lingniu-go-history-writer.service
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systemctl restart lingniu-go-stat-writer.service
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systemctl restart lingniu-go-realtime-api.service
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```
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健康检查：
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```bash
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for port in 20211 20212 20213 20214 20200; do
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curl -fsS "http://127.0.0.1:${port}/readyz"
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echo
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done
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```
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## 中间件
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Kafka / NATS ECS：
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- 公网：`114.55.58.251`
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- 内网：`172.17.111.56`
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- NATS：`172.17.111.56:4222`
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TDengine：
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- 内网：`172.17.111.57`
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- WS：`172.17.111.57:6041`
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- 数据库：`lingniu_vehicle_ts`
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MySQL RDS：
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- 内网：`rm-bp179zbv481rnw3e2.mysql.rds.aliyuncs.com:3306`
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- 数据库：`lingniu_vehicle_data`
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Redis：
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- 内网：`r-bp1u741kij7e51i481.redis.rds.aliyuncs.com:6379`
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- DB：`50`
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不要在最终回答中明文输出生产密码。
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## Topic
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当前 Go raw topic：
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```text
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vehicle.raw.go.gb32960.v1
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vehicle.raw.go.jt808.v1
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vehicle.raw.go.yutong-mqtt.v1
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```
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fields topic 已存在：
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```text
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vehicle.fields.go.gb32960.v1
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vehicle.fields.go.jt808.v1
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vehicle.fields.go.yutong-mqtt.v1
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```
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当前核心链路仍以 raw topic 作为事实输入；raw envelope 里已经包含一次性预计算的 `parsed_fields`。
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## 代码结构
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主要目录：
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```text
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go/vehicle-gateway/cmd/gateway
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go/vehicle-gateway/cmd/history-writer
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go/vehicle-gateway/cmd/realtime-api
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go/vehicle-gateway/cmd/stat-writer
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go/vehicle-gateway/cmd/nats-fast-writer
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go/vehicle-gateway/cmd/nats-kafka-bridge
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go/vehicle-gateway/internal/protocol/gb32960
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go/vehicle-gateway/internal/protocol/jt808
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go/vehicle-gateway/internal/protocol/yutongmqtt
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go/vehicle-gateway/internal/realtime
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go/vehicle-gateway/internal/history
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go/vehicle-gateway/internal/identity
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```
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每次改代码后在本地跑：
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```bash
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cd go/vehicle-gateway
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go test ./...
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```
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## 解析和存储原则
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### 一次解析字段
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2026-07-03 已完成优化：
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- `FrameEnvelope` 增加：
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- `parsed_fields`
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- `parsed_field_types`
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- Gateway 在发布 raw 前调用 `realtime.EnsureParsedFields(&env)`。
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- TDengine writer、Redis realtime KV、MySQL snapshot 优先使用 `env.ParsedFields`。
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- 旧消息没有 `parsed_fields` 时，保留 fallback，从 `Parsed` 展开一次。
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相关文件：
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```text
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go/vehicle-gateway/internal/envelope/envelope.go
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go/vehicle-gateway/internal/realtime/kv.go
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go/vehicle-gateway/internal/gateway/tcp_server.go
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go/vehicle-gateway/internal/gateway/mqtt_client.go
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go/vehicle-gateway/internal/history/writer.go
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go/vehicle-gateway/internal/realtime/repository.go
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go/vehicle-gateway/internal/realtime/snapshot_writer.go
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```
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### GB32960 多帧
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GB32960 有两类实际模式：
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1. 单条 `0x02` 同时包含标准 data unit 和 vendor data unit。
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2. 标准帧加 vendor 栈分片帧。
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例子：
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- `LB9A32A24R0LS1426`：单帧完整混合上报，单帧约 `774 bytes`，`gd_fc_stack.cell_count=108`。
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- `LNXNEGRR7SR318212`：多帧上报，`gd_fc_stack.cell_count=432`，按 `200 + 200 + 32` 分片。
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TDengine raw_frames 必须保持单帧事实，不跨帧合并。
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Redis/MySQL 实时视图可以按 `protocol + vin` 增量合并，但不能让后来的 stack-only 帧覆盖标准车辆字段。
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### JT808
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JT808 主入口端口是 `808`，不再使用 `8089`。
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解析重点：
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- 包头手机号按 BCD 去前导 0。
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- `0x0100` 注册帧写 `jt808_registration`。
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- `0x0102` 鉴权帧尝试按 phone 查 registration/binding 关联 VIN。
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- `0x0200` 位置帧即使没有注册/鉴权，也会按 phone 降级查 `vehicle_identity_binding`，建立 session。
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- 位置附加信息 `0x01` 是 GPS 总里程，按差值用于每日里程。
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## MySQL 身份表
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`vehicle_identity_binding` 是外部维护事实表，服务只读，不允许运行时写入。
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核心字段：
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```text
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vin
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plate
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phone
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oem
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updated_at
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```
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用途：
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- JT808 用 phone 或 plate 找 VIN。
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- Realtime snapshot/location 用 VIN 反查 plate。
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- 后续导入 G7s、广安车联等来源时更新 phone/oem。
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`jt808_registration` 是 808 注册鉴权运行状态表，以 phone 为主键，记录注册、鉴权、source_endpoint、关联 VIN 状态。
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## 2026-07-03 数据维护记录
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### G7s binding
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源文件：
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```text
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/Users/lingniu/Library/Mobile Documents/com~apple~CloudDocs/rsync/2026_07_02_17_11_37转发配置列表-1(2).xlsx
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```
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处理规则：
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1. 删除原有 G7/G7s 的 `phone/oem`。
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2. 使用文件中的 `手机号` 列更新。
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3. 冲突的不更新，其他更新。
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执行结果：
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- 清空旧 G7/G7s：`666` 行。
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- 更新安全 G7s：`561` 行。
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- 跳过：`72` 行。
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- 缺 plate 或 VIN：`14`
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- 与非 G7/G7s 绑定冲突：`58`
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跳过清单：
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```text
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outputs/g7s_binding_skipped_apply.csv
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```
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### JT808 unknown VIN 导出
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导出条件：
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- `jt808_registration.vin` 为空、`unknown` 或 `unknow`
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- 且 `phone` 不存在于 `vehicle_identity_binding.phone`
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结果：
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- `30` 个 phone
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导出文件：
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```text
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outputs/jt808_unknown_vin_phone_not_in_binding.csv
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```
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## 常用查询
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历史 raw frame：
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```bash
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curl -s 'http://115.29.187.205:20200/api/history/raw-frames?protocol=GB32960&vin=LB9A32A24R0LS1426&limit=1&includeFields=true'
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```
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只取指定 parsed fields：
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```bash
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curl -s 'http://115.29.187.205:20200/api/history/raw-frames?protocol=GB32960&vin=LB9A32A24R0LS1426&limit=1&includeFields=true&fields=gb32960.vehicle.speed_kmh&fields=gb32960.gd_fc_stack.stack_water_outlet_temp_c'
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```
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808 源 IP：
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```bash
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journalctl -u lingniu-go-gateway.service --since '10 minutes ago' --no-pager
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ss -tn sport = :808
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```
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最近已观察到 808 源 IP：
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```text
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115.159.85.149
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222.66.200.68
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122.152.221.156
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115.231.168.135
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```
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## 部署步骤
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本地构建：
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```bash
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cd go/vehicle-gateway
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GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -trimpath -ldflags='-s -w' -o /tmp/lingniu-go-deploy/gateway ./cmd/gateway
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GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -trimpath -ldflags='-s -w' -o /tmp/lingniu-go-deploy/history-writer ./cmd/history-writer
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GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -trimpath -ldflags='-s -w' -o /tmp/lingniu-go-deploy/realtime-api ./cmd/realtime-api
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GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -trimpath -ldflags='-s -w' -o /tmp/lingniu-go-deploy/stat-writer ./cmd/stat-writer
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GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -trimpath -ldflags='-s -w' -o /tmp/lingniu-go-deploy/nats-fast-writer ./cmd/nats-fast-writer
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GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -trimpath -ldflags='-s -w' -o /tmp/lingniu-go-deploy/nats-kafka-bridge ./cmd/nats-kafka-bridge
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```
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上传部署：
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```bash
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release="name-$(date +%Y%m%d%H%M%S)"
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ssh root@115.29.187.205 "mkdir -p /opt/lingniu-go-native/releases/$release"
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scp /tmp/lingniu-go-deploy/* root@115.29.187.205:/opt/lingniu-go-native/releases/$release/
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ssh root@115.29.187.205 "chmod 755 /opt/lingniu-go-native/releases/$release/* && ln -sfn /opt/lingniu-go-native/releases/$release /opt/lingniu-go-native/current"
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```
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部署后验证：
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```bash
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ssh root@115.29.187.205 '
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systemctl is-active lingniu-go-gateway.service lingniu-go-nats-fast-writer.service lingniu-go-nats-kafka-bridge.service lingniu-go-history-writer.service lingniu-go-stat-writer.service lingniu-go-realtime-api.service
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for port in 20211 20212 20213 20214 20200; do curl -fsS "http://127.0.0.1:${port}/readyz"; echo; done
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journalctl -u lingniu-go-gateway.service --since "2 minutes ago" --no-pager | grep -Ei "error|failed|panic|fatal" || true
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'
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```
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## 2026-07-03 10W 接入优化部署记录
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Release：
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```text
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/opt/lingniu-go-native/releases/100k-hardening-20260703175730
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```
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包含：
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- Gateway 默认 `TCP_MAX_CONNECTIONS=120000`。
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- 新增 `vehicle_gateway_connection_rejections_total`。
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- 新增 `/opt/lingniu-go-native/current/load-sim` 运维压测工具。
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- Redis-first realtime projector 增加 MySQL async queue dropped 回归测试。
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ECS 已落地内核参数：
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```text
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net.core.somaxconn = 65535
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net.ipv4.tcp_max_syn_backlog = 65535
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net.ipv4.ip_local_port_range = 10000 65000
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net.ipv4.tcp_tw_reuse = 1
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```
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注意：远端 `/etc/sysctl.conf` 原本有 `net.ipv4.tcp_max_syn_backlog = 1024`，已改为 `65535`，同时保留 `/etc/sysctl.d/zz-lingniu-vehicle-ingest.conf`。
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部署后验证：
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- `current` 指向 `100k-hardening-20260703175730`。
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- `20211/20212/20213/20214/20200` readyz 均为 ok。
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- `808`、`32960`、`20200`、`20211-20214` 监听 backlog 均显示 `65535`。
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- Gateway 重启后持续接收 GB32960、JT808、Yutong MQTT 帧。
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- 重启完成后窗口未发现 gateway/realtime-api 持续 error/fatal 日志。
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### 10W 阶段压测进展
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2026-07-03 已完成 ECS 本机 JT808 hold-only 阶段压测，不发送业务帧：
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| 阶段 | 结果 |
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| --- | --- |
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| 100 连接 / 60s | opened `100`，failed `0`，frames `0`，write_errors `0` |
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| 1,000 连接 / 60s | opened `1000`，failed `0`，frames `0`，write_errors `0` |
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| 10,000 连接 / 120s | opened `10000`，failed `0`，frames `0`，write_errors `0` |
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| 50,000 连接 / 180s | opened `50000`，failed `0`，frames `0`，write_errors `0` |
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| 100,000 总连接 / 180s | JT808 opened `50000`、GB32960 opened `50000`，failed `0`，frames `0`，write_errors `0` |
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1W 阶段峰值约 `10240` JT808 active connections，gateway FD 约 `10256`，NATS ack pending 为 `0`，压测后连接回落到生产基线约 `240`，readyz 全部 OK。
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5W 阶段峰值约 `50238` JT808 active connections，gateway FD 约 `50254`，available memory 约 `5590 MB`。NATS ack pending 中间短时到 `29`，`18:16:49 CST` 回到 `0`；history/stat/realtime Kafka lag 总和均为 `0`。压测后 JT808 active 回落到生产基线约 `238-240`，readyz 全部 OK。
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10W 总连接阶段使用双端口 loopback：JT808 `50000` + GB32960 `50000`，均 `-send=false`。峰值约 `100238` active connections，gateway FD 约 `100252`，available memory 约 `4511 MB`。NATS ack pending 中间短时到 `10`，`18:23:02 CST` 回到 `0`；history/stat/realtime Kafka lag 总和均为 `0`。压测后 JT808 回落到约 `236`，GB32960 回落到约 `2`，readyz 全部 OK。
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### Gateway async publish 指标
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2026-07-03 已部署 gateway async sink 指标到 ECS 当前 release：
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```text
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vehicle_async_sink_enqueue_total{sink,kind,status}
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vehicle_async_sink_publish_total{sink,kind,status}
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vehicle_async_sink_publish_duration_ms{sink,kind,status}
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vehicle_async_sink_queue_depth{sink}
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```
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部署后验证：
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- `vehicle_async_sink_queue_depth{sink="nats"} 0`
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- `vehicle_async_sink_enqueue_total{kind="raw",sink="nats",status="queued"}` 持续增长
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- `vehicle_async_sink_publish_total{kind="raw",sink="nats",status="ok"}` 持续增长
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- NATS bridge ack pending 为 `0`
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- Gateway 启动后窗口无 `error|failed|panic|fatal` 日志
|
||
|
||
这些指标是进入带帧率压测前的关键保护栏：如果 `queue_depth` 持续增长或 `enqueue_total{status="timeout"}` 增长，说明入口 publish 队列已成为瓶颈。
|
||
|
||
### NATS Kafka bridge batch 指标
|
||
|
||
2026-07-03 已为 NATS -> Kafka bridge 增加 batch pending 和 duration histogram：
|
||
|
||
```text
|
||
vehicle_bridge_batch_pending_messages
|
||
vehicle_bridge_batch_pending_kafka_messages
|
||
vehicle_bridge_batch_duration_ms_histogram_bucket{status,le}
|
||
vehicle_bridge_batch_duration_ms_histogram_count{status}
|
||
vehicle_bridge_batch_duration_ms_histogram_sum{status}
|
||
```
|
||
|
||
该耗时覆盖一批 NATS 消息路由到 Kafka、Kafka 同步写入、NATS ack 的完整过程。带帧率压测时，如果 pending 持续非 0 或 duration p99 持续上升，应优先排查 Kafka broker、bridge batch size、NATS ack-pending 和网络。
|
||
|
||
### Gateway frame duration histogram
|
||
|
||
2026-07-03 已为 Gateway 帧处理耗时增加 histogram：
|
||
|
||
```text
|
||
vehicle_gateway_frame_duration_ms_histogram_bucket{protocol,status,le}
|
||
vehicle_gateway_frame_duration_ms_histogram_count{protocol,status}
|
||
vehicle_gateway_frame_duration_ms_histogram_sum{protocol,status}
|
||
```
|
||
|
||
该耗时覆盖单帧从解析、identity resolve、parsed fields 生成、publish enqueue 到协议响应写入的整体入口处理路径。带帧率压测时用它按协议观察 p95/p99，不能只看 `vehicle_gateway_frame_duration_ms` 最后一条 gauge。
|
||
|
||
### History writer TDengine 批写
|
||
|
||
2026-07-03 已实现 history-writer 第一阶段批写：
|
||
|
||
- `history.Writer.AppendAllBatch` 按 TDengine child table 聚合 raw/location 多行 `INSERT`。
|
||
- `cmd/history-writer` 默认 `HISTORY_BATCH_SIZE=200`、`HISTORY_BATCH_WAIT_MS=100`。
|
||
- TDengine batch 成功后才批量提交 Kafka messages；失败不提交 offset。
|
||
- 保留单条 `AppendAll` 路径作为回退。
|
||
|
||
新增指标：
|
||
|
||
```text
|
||
vehicle_history_batch_flush_total{status}
|
||
vehicle_history_batch_rows_total{status}
|
||
vehicle_history_batch_pending_messages
|
||
vehicle_history_batch_pending_rows
|
||
vehicle_history_batch_flush_duration_ms{status}
|
||
```
|
||
|
||
进入带帧率压测时，必须同时观察 `vehicle_history_kafka_lag`、`vehicle_history_batch_pending_*` 和 `vehicle_history_batch_*`。如果 pending 持续非 0 但 Kafka lag 尚未放大，说明 history-writer 已经在本地批写或提交阶段形成早期积压。
|
||
|
||
## 下次恢复上下文时先做
|
||
|
||
1. 读本文件。
|
||
2. 读 `docs/ops/vehicle-ingest-runbook.md`。
|
||
3. 读 `docs/architecture/production-data-plane-inventory.md`。
|
||
4. 执行 `git status --short`。
|
||
5. 如果涉及生产，先查 ECS 服务健康和最近日志。
|