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feat: HTTP API, Prometheus metrics stage, RPKI metrics #32
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,265 @@ | ||
| package core | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "encoding/json" | ||
| "errors" | ||
| "fmt" | ||
| "html" | ||
| "net" | ||
| "net/http" | ||
| "net/http/pprof" | ||
| "strings" | ||
| "time" | ||
|
|
||
| vmmetrics "github.com/VictoriaMetrics/metrics" | ||
| "github.com/go-chi/chi/v5" | ||
| ) | ||
|
|
||
| func (b *Bgpipe) configureHTTP() error { | ||
| addr := strings.TrimSpace(b.K.String("http")) | ||
| if addr == "" { | ||
| b.HTTP = nil | ||
| b.httpmux = nil | ||
| return nil | ||
| } | ||
|
|
||
| m := chi.NewRouter() | ||
| b.httpmux = m | ||
| b.HTTP = &http.Server{ | ||
| Addr: addr, | ||
| Handler: m, | ||
| ReadHeaderTimeout: 5 * time.Second, | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func (b *Bgpipe) startHTTP() error { | ||
| if b.HTTP == nil { | ||
| return nil | ||
| } | ||
|
|
||
| ln, err := net.Listen("tcp", b.HTTP.Addr) | ||
| if err != nil { | ||
| return fmt.Errorf("could not bind --http %s: %w", b.HTTP.Addr, err) | ||
| } | ||
|
|
||
| go func() { | ||
| err := b.HTTP.Serve(ln) | ||
| if err == nil || errors.Is(err, http.ErrServerClosed) { | ||
| return | ||
| } | ||
| b.Cancel(fmt.Errorf("http server failed: %w", err)) | ||
| }() | ||
|
|
||
| b.Info().Str("addr", ln.Addr().String()).Msg("HTTP API listening") | ||
| return nil | ||
| } | ||
|
|
||
| func (b *Bgpipe) stopHTTP() { | ||
| if b.HTTP == nil { | ||
| return | ||
| } | ||
|
|
||
| ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second) | ||
| defer cancel() | ||
| if err := b.HTTP.Shutdown(ctx); err != nil && !errors.Is(err, http.ErrServerClosed) { | ||
| b.Warn().Err(err).Msg("HTTP API shutdown error") | ||
| } | ||
| } | ||
|
|
||
| func (b *Bgpipe) attachHTTPStages() error { | ||
| if b.httpmux == nil { | ||
| return nil | ||
| } | ||
|
|
||
| m := b.httpmux | ||
| used := make(map[string]struct{}) | ||
|
|
||
| // mount per-stage routes | ||
| for _, s := range b.Stages { | ||
| if s == nil { | ||
| continue | ||
| } | ||
|
|
||
| r := chi.NewRouter() | ||
| if err := s.Stage.RouteHTTP(r); err != nil { | ||
| return s.Errorf("could not register HTTP API: %w", err) | ||
| } | ||
| if len(r.Routes()) == 0 { | ||
| continue | ||
| } | ||
|
|
||
| base := s.HTTPSlug() | ||
| if _, exists := used[base]; exists { | ||
| base = fmt.Sprintf("%s-%d", base, s.Index) | ||
| } | ||
| used[base] = struct{}{} | ||
|
|
||
| s.HTTPPath = "/stage/" + base | ||
| m.Mount(s.HTTPPath, r) | ||
|
|
||
| s.Info().Str("http", s.HTTPPath).Msg("stage HTTP API mounted") | ||
| } | ||
|
|
||
| // GET /metrics — Prometheus | ||
| m.Get("/metrics", func(w http.ResponseWriter, r *http.Request) { | ||
| w.Header().Set("Content-Type", "text/plain; version=0.0.4; charset=utf-8") | ||
| vmmetrics.WritePrometheus(w, true) | ||
| }) | ||
|
|
||
| // GET /hc — k8s health check | ||
| m.Get("/hc", func(w http.ResponseWriter, r *http.Request) { | ||
| w.Header().Set("Content-Type", "application/json") | ||
| json.NewEncoder(w).Encode(map[string]any{ | ||
| "status": "ok", | ||
| "version": b.Version, | ||
| "stages": b.StageCount(), | ||
| "uptime": time.Since(b.StartTime).Truncate(time.Second).String(), | ||
| }) | ||
| }) | ||
|
|
||
| // GET / — web dashboard | ||
| m.Get("/", b.httpDashboard) | ||
|
|
||
| // pprof? | ||
| if b.K.Bool("pprof") { | ||
| m.HandleFunc("/debug/pprof/", pprof.Index) | ||
| m.HandleFunc("/debug/pprof/cmdline", pprof.Cmdline) | ||
| m.HandleFunc("/debug/pprof/profile", pprof.Profile) | ||
| m.HandleFunc("/debug/pprof/symbol", pprof.Symbol) | ||
| m.HandleFunc("/debug/pprof/trace", pprof.Trace) | ||
| b.Info().Msg("pprof enabled at /debug/pprof/") | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func (b *Bgpipe) httpDashboard(w http.ResponseWriter, r *http.Request) { | ||
| uptime := time.Since(b.StartTime).Truncate(time.Second) | ||
|
|
||
| // collect stage info | ||
| type stageInfo struct { | ||
| Index int | ||
| Name string | ||
| Cmd string | ||
| Dir string | ||
| HTTPPath string | ||
| } | ||
| var stages []stageInfo | ||
| for _, s := range b.Stages { | ||
| if s == nil { | ||
| continue | ||
| } | ||
| stages = append(stages, stageInfo{ | ||
| Index: s.Index, | ||
| Name: s.Name, | ||
| Cmd: s.Cmd, | ||
| Dir: s.StringLR(), | ||
| HTTPPath: s.HTTPPath, | ||
| }) | ||
| } | ||
|
|
||
| // render pipeline text (like --explain) | ||
| var pipeR, pipeL bytes.Buffer | ||
| b.StageDump(1, &pipeR) // DIR_R = 1 | ||
| b.StageDump(2, &pipeL) // DIR_L = 2 | ||
|
Comment on lines
+167
to
+168
|
||
|
|
||
| var buf bytes.Buffer | ||
| fmt.Fprintf(&buf, `<!DOCTYPE html> | ||
| <html lang="en"> | ||
| <head> | ||
| <meta charset="utf-8"> | ||
| <meta name="viewport" content="width=device-width, initial-scale=1"> | ||
| <title>bgpipe %s</title> | ||
| <style> | ||
| :root { --bg: #0d1117; --fg: #c9d1d9; --accent: #58a6ff; --card: #161b22; --border: #30363d; --dim: #8b949e; --green: #3fb950; } | ||
| * { margin: 0; padding: 0; box-sizing: border-box; } | ||
| body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif; background: var(--bg); color: var(--fg); min-height: 100vh; padding: 2rem; } | ||
| .container { max-width: 900px; margin: 0 auto; } | ||
| h1 { font-size: 1.5rem; margin-bottom: 0.25rem; } | ||
| h1 span { color: var(--accent); } | ||
| .subtitle { color: var(--dim); font-size: 0.875rem; margin-bottom: 1.5rem; } | ||
| .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 1.5rem; } | ||
| .card { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 1rem; } | ||
| .card .label { color: var(--dim); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; } | ||
| .card .value { font-size: 1.25rem; font-weight: 600; margin-top: 0.25rem; } | ||
| .card .value.ok { color: var(--green); } | ||
| h2 { font-size: 1rem; color: var(--dim); margin-bottom: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; } | ||
| .pipeline { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 1rem; margin-bottom: 1.5rem; font-family: 'SF Mono', SFMono-Regular, Consolas, 'Liberation Mono', Menlo, monospace; font-size: 0.8125rem; white-space: pre; overflow-x: auto; color: var(--dim); line-height: 1.5; } | ||
| table { width: 100%%; border-collapse: collapse; margin-bottom: 1.5rem; } | ||
| th, td { text-align: left; padding: 0.5rem 0.75rem; border-bottom: 1px solid var(--border); font-size: 0.875rem; } | ||
| th { color: var(--dim); font-weight: 500; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; } | ||
| a { color: var(--accent); text-decoration: none; } | ||
| a:hover { text-decoration: underline; } | ||
| .links { display: flex; gap: 1.5rem; flex-wrap: wrap; } | ||
| .links a { background: var(--card); border: 1px solid var(--border); border-radius: 6px; padding: 0.5rem 1rem; font-size: 0.875rem; } | ||
| .links a:hover { border-color: var(--accent); text-decoration: none; } | ||
| </style> | ||
| </head> | ||
| <body> | ||
| <div class="container"> | ||
| <h1><span>bgpipe</span> dashboard</h1> | ||
| <p class="subtitle">BGP pipeline processor</p> | ||
|
|
||
| <div class="grid"> | ||
| <div class="card"><div class="label">Version</div><div class="value">%s</div></div> | ||
| <div class="card"><div class="label">Uptime</div><div class="value">%s</div></div> | ||
| <div class="card"><div class="label">Stages</div><div class="value">%d</div></div> | ||
| <div class="card"><div class="label">Status</div><div class="value ok">Running</div></div> | ||
| </div> | ||
|
|
||
| <h2>Pipeline</h2> | ||
| <div class="pipeline">`, html.EscapeString(b.Version), | ||
| html.EscapeString(b.Version), | ||
| html.EscapeString(uptime.String()), | ||
| b.StageCount()) | ||
|
|
||
| fmt.Fprintf(&buf, "--> Messages flowing right -->\n%s\n<-- Messages flowing left <--\n%s", | ||
| html.EscapeString(pipeR.String()), | ||
| html.EscapeString(pipeL.String())) | ||
|
|
||
| fmt.Fprintf(&buf, `</div> | ||
|
|
||
| <h2>Stages</h2> | ||
| <table> | ||
| <tr><th>#</th><th>Name</th><th>Command</th><th>Direction</th><th>HTTP</th></tr>`) | ||
|
|
||
| for _, s := range stages { | ||
| httpCol := "-" | ||
| if s.HTTPPath != "" { | ||
| httpCol = fmt.Sprintf(`<a href="%s/">%s/</a>`, s.HTTPPath, s.HTTPPath) | ||
| } | ||
| fmt.Fprintf(&buf, "\n <tr><td>%d</td><td>%s</td><td>%s</td><td><code>%s</code></td><td>%s</td></tr>", | ||
| s.Index, | ||
| html.EscapeString(s.Name), | ||
| html.EscapeString(s.Cmd), | ||
| html.EscapeString(s.Dir), | ||
| httpCol) | ||
| } | ||
|
|
||
| fmt.Fprintf(&buf, ` | ||
| </table> | ||
|
|
||
| <h2>Links</h2> | ||
| <div class="links"> | ||
| <a href="/metrics">Prometheus Metrics</a> | ||
| <a href="/hc">Health Check</a>`) | ||
|
|
||
| if b.K.Bool("pprof") { | ||
| fmt.Fprintf(&buf, ` | ||
| <a href="/debug/pprof/">pprof</a>`) | ||
| } | ||
|
|
||
| fmt.Fprintf(&buf, ` | ||
| <a href="https://bgpipe.org">Documentation</a> | ||
| </div> | ||
| </div> | ||
| </body> | ||
| </html>`) | ||
|
|
||
| w.Header().Set("Content-Type", "text/html; charset=utf-8") | ||
| w.Write(buf.Bytes()) | ||
| } | ||
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The
HTTPandStartTimefields break the field alignment pattern established by the other fields in this group (F,K,Pipe,Stagesall use consistent alignment). Consider aligning these new fields with the group above, or separating them into their own group with a blank line.