david
876d2aa45f
Refs #2 - /metrics served on a dedicated port (KNOX_METRICS_ADDR, default localhost:8932) via prometheus/client_golang, with Go runtime + process collectors - DB-derived gauges refreshed per scrape: observations by source, last-24h observations, entries, projects, sessions, pending reflections, threads by status, peers, observations by origin node, knowledge vector (max hcl per node) - live gossip counters (pulls/pushes, observations pulled/pushed, errors) incremented during the anti-entropy sweep; Run accepts an optional metrics handle (nil for one-shot CLI) - knox_node_info{node_id,name} for scrape identification - internal/metrics package + db MetricsSnapshot; tests for snapshot, scrape output, and counter increments
108 lines
3.0 KiB
Go
108 lines
3.0 KiB
Go
package db
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// MetricsSnapshot holds the scrape-time gauges derived from the database.
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type MetricsSnapshot struct {
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Observations int
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ObservationsLast24h int
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BySource map[string]int
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Entries int
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Projects int
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Sessions int
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PendingReflections int
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ThreadsByStatus map[string]int
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Peers int
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ByOriginNode map[string]int // node_id → observation count
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KnowledgeVector map[string]int64 // node_id → max hcl
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EarliestObservation string
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}
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// MetricsSnapshot computes database-derived gauges for Prometheus scraping.
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// All queries are cheap aggregations; nothing is stored or mutated.
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func (k *KnoxDB) MetricsSnapshot() (*MetricsSnapshot, error) {
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s := &MetricsSnapshot{
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BySource: make(map[string]int),
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ThreadsByStatus: make(map[string]int),
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ByOriginNode: make(map[string]int),
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}
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if err := k.db.QueryRow("SELECT COUNT(*) FROM observations").Scan(&s.Observations); err != nil {
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return nil, err
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}
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if err := k.db.QueryRow("SELECT COUNT(*) FROM observations WHERE collected_at > datetime('now', '-1 day')").Scan(&s.ObservationsLast24h); err != nil {
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return nil, err
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}
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if err := k.db.QueryRow("SELECT COUNT(*) FROM entries").Scan(&s.Entries); err != nil {
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return nil, err
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}
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if err := k.db.QueryRow("SELECT COUNT(DISTINCT project) FROM entries").Scan(&s.Projects); err != nil {
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return nil, err
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}
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if err := k.db.QueryRow("SELECT COUNT(*) FROM sessions").Scan(&s.Sessions); err != nil {
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return nil, err
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}
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if err := k.db.QueryRow("SELECT COUNT(*) FROM sessions WHERE indexed=0").Scan(&s.PendingReflections); err != nil {
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return nil, err
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}
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if err := k.db.QueryRow("SELECT COUNT(*) FROM peers").Scan(&s.Peers); err != nil {
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return nil, err
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}
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if err := k.db.QueryRow("SELECT COALESCE(MIN(collected_at),'') FROM observations").Scan(&s.EarliestObservation); err != nil {
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return nil, err
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}
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rows, err := k.db.Query("SELECT COALESCE(source_id,'unknown'), COUNT(*) FROM observations GROUP BY source_id")
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if err != nil {
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return nil, err
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}
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defer rows.Close()
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for rows.Next() {
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var src string
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var n int
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if err := rows.Scan(&src, &n); err != nil {
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return nil, err
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}
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s.BySource[src] = n
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}
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if err := rows.Err(); err != nil {
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return nil, err
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}
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rows2, err := k.db.Query("SELECT COALESCE(status,'active'), COUNT(*) FROM threads GROUP BY status")
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if err != nil {
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return nil, err
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}
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defer rows2.Close()
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for rows2.Next() {
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var st string
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var n int
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if err := rows2.Scan(&st, &n); err != nil {
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return nil, err
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}
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s.ThreadsByStatus[st] = n
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}
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if err := rows2.Err(); err != nil {
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return nil, err
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}
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rows3, err := k.db.Query("SELECT node_id, COUNT(*) FROM observations WHERE node_id<>'' GROUP BY node_id")
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if err != nil {
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return nil, err
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}
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defer rows3.Close()
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for rows3.Next() {
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var nid string
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var n int
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if err := rows3.Scan(&nid, &n); err != nil {
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return nil, err
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}
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s.ByOriginNode[nid] = n
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}
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if err := rows3.Err(); err != nil {
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return nil, err
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}
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if s.KnowledgeVector, err = k.KnowledgeVector(); err != nil {
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return nil, err
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}
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return s, nil
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} |