Blizzard
9a3a816c80
把散落各服务的硬编码 system prompt 收口为受管注册表，不重编译即可改/回滚/对比： - shared/prompts：内置默认(随代码) + 运行期覆盖(PROMPTS_FILE) + Get/Keys，并发安全，含单测 - 接入 9 处：mcp-go(graph.extract)；dispatcher(eval.quality/eval.refine/guard.jailbreak/ coordinator.lead/memory.extract，按引用登记默认、无文本重复) - main 启动调 LoadFile 加载 PROMPTS_FILE 覆盖 - live A/B：覆盖 graph.extract → 图谱抽取 2 条→0 条、向量仍正常（覆盖生效、管道未坏） - v2(DB 控制面热切换 + 灰度)留后续 Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
115 lines
4.8 KiB
Go
115 lines
4.8 KiB
Go
// Command server 启动 sundynix-mcp-go —— 第 5 层 Go I/O 型 MCP 工具微服务。
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package main
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import (
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"context"
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"log"
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"os"
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"os/signal"
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"syscall"
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sharedbus "github.com/sundynix/sundynix-shared/bus"
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"github.com/sundynix/sundynix-shared/contract"
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"github.com/sundynix/sundynix-mcp-go/internal/history"
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"github.com/sundynix/sundynix-mcp-go/internal/mcp"
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"github.com/sundynix/sundynix-mcp-go/internal/memory"
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"github.com/sundynix/sundynix-mcp-go/internal/rag"
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"github.com/sundynix/sundynix-mcp-go/internal/search"
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"github.com/sundynix/sundynix-shared/otelx"
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"github.com/sundynix/sundynix-shared/prompts"
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"github.com/sundynix/sundynix-shared/secrets"
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)
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func main() {
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secrets.MustHaveKeyInProd() // 生产须配 SUNDYNIX_SECRET_KEY 以解密下发的 api_key 密文
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otelx.SetupSlog("sundynix-mcp-go") // 结构化日志 + 链路感知（工具日志带 trace_id）
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// 链路追踪：工具服务端 span 续上 dispatcher 的 trace（tool.call → tool.serve）。
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shutdownTrace, _ := otelx.Init(context.Background(), "sundynix-mcp-go")
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defer func() { _ = shutdownTrace(context.Background()) }()
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// 受管 prompt：登记内置默认 + 加载 PROMPTS_FILE 覆盖（不重编译即可改图谱抽取词）。
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prompts.SetDefault(prompts.GraphExtract,
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"你是知识图谱抽取器。从用户文本中抽取知识三元组，输出 JSON 数组，每项形如 {\"s\":\"主体\",\"p\":\"关系\",\"o\":\"客体\"}。实体用简洁名词，关系用简短动词短语。只输出 JSON，不要任何解释或代码块标记。")
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prompts.LoadFile()
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natsURL := envOr("NATS_URL", "nats://localhost:4222")
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// DSN 用 127.0.0.1 而非 localhost：免 pgx 每连接 DNS 解析，避免高并发连接池扩容时 DNS 雪崩
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// （见 LOAD_TEST_REPORT §4.3）。
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pgDSN := envOr("POSTGRES_DSN", "postgres://sundynix:sundynix@127.0.0.1:5432/sundynix?sslmode=disable")
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redisAddr := envOr("REDIS_ADDR", "localhost:6379")
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milvusAddr := envOr("MILVUS_ADDR", "localhost:19530")
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embBase := envOr("EMBED_BASE_URL", "") // OpenAI 兼容 embeddings 端点（空=向量检索降级）
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embKey := envOr("EMBED_API_KEY", "")
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embModel := envOr("EMBED_MODEL", "")
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rerankBase := envOr("RERANK_BASE_URL", "") // DashScope 文本重排端点（空=不启用 rerank）
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rerankKey := envOr("RERANK_API_KEY", "")
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rerankModel := envOr("RERANK_MODEL", "")
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neo4jURI := envOr("NEO4J_URI", "neo4j://localhost:7687") // GraphRAG 图谱（连不上则降级）
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neo4jUser := envOr("NEO4J_USER", "neo4j")
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neo4jPass := envOr("NEO4J_PASS", "sundynix")
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b, err := sharedbus.Connect(natsURL)
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if err != nil {
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log.Fatalf("[mcp_go] nats connect: %v", err)
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}
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defer b.Close()
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log.Printf("[mcp_go] connected %s", natsURL)
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engine := search.NewHybrid() // LLM Wiki 混合检索：Bleve + Milvus + Neo4j
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mem := memory.Open(pgDSN) // 偏好记忆：sundynix_user_profile（连不上则降级）
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defer mem.Close()
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hist := history.Open(redisAddr) // 会话短期历史：Redis（连不上则降级）
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defer hist.Close()
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ctx, stop := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
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defer stop()
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// RAG 核心链：embedding + Milvus(向量) + Bleve(全文) + Neo4j(图谱) + 可选 rerank
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ragEngine := rag.Open(ctx, rag.Config{
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MilvusAddr: milvusAddr,
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EmbedBase: embBase, EmbedKey: embKey, EmbedModel: embModel,
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RerankBase: rerankBase, RerankKey: rerankKey, RerankModel: rerankModel,
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Neo4jURI: neo4jURI, Neo4jUser: neo4jUser, Neo4jPass: neo4jPass,
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})
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defer ragEngine.Close()
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// 配置控制面：取激活 embedding(向量) + chat(图谱抽取) 配置并订阅热更新。
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applyEmbed := func(cfg *contract.ModelConfig) {
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if cfg != nil {
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ragEngine.SetEmbedding(cfg.BaseURL, cfg.APIKey, cfg.Model)
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}
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}
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applyChat := func(cfg *contract.ModelConfig) {
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if cfg != nil {
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ragEngine.SetChat(cfg.BaseURL, cfg.APIKey, cfg.Model)
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}
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}
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// 先订阅热更新（控制台改配置即生效）。
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if _, err := b.SubscribeConfigUpdated(contract.ConfigKindChat, applyChat); err != nil {
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log.Printf("[mcp_go] subscribe chat config: %v", err)
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}
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if _, err := b.SubscribeConfigUpdated(contract.ConfigKindEmbedding, applyEmbed); err != nil {
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log.Printf("[mcp_go] subscribe embedding config: %v", err)
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}
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// 后台重试拉初始配置：容忍 gateway 晚于本服务启动（避免一次性扑空致 RAG 长期降级）。
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go b.RequestConfigWithRetry(ctx, contract.ConfigKindEmbedding, applyEmbed)
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go b.RequestConfigWithRetry(ctx, contract.ConfigKindChat, applyChat)
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gw := mcp.NewGateway(b, engine, mem, hist, ragEngine, pgDSN)
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log.Println("[mcp_go] serving MCP over sundynix.tools.go.* (Ctrl-C to quit)")
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if err := gw.Serve(ctx); err != nil && err != context.Canceled {
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log.Fatalf("[mcp_go] exit: %v", err)
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}
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}
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func envOr(key, def string) string {
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if v := os.Getenv(key); v != "" {
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return v
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}
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return def
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}
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