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// SPDX-License-Identifier: GPL-3.0-or-later
package uwsgi
import (
"encoding/json"
"fmt"
)
type statsResponse struct {
Workers []workerStats `json:"workers"`
}
type workerStats struct {
ID int `json:"id"`
Accepting int64 `json:"accepting"`
Requests int64 `json:"requests"`
DeltaRequests int64 `json:"delta_requests"`
Exceptions int64 `json:"exceptions"`
HarakiriCount int64 `json:"harakiri_count"`
Status string `json:"status"`
RSS int64 `json:"rss"`
VSZ int64 `json:"vsz"`
RespawnCount int64 `json:"respawn_count"`
TX int64 `json:"tx"`
AvgRT int64 `json:"avg_rt"`
}
func (u *Uwsgi) collect() (map[string]int64, error) {
conn, err := u.establishConn()
if err != nil {
return nil, fmt.Errorf("failed to connect: %v", err)
}
defer conn.disconnect()
stats, err := conn.queryStats()
if err != nil {
return nil, fmt.Errorf("failed to query stats: %v", err)
}
mx := make(map[string]int64)
if err := u.collectStats(mx, stats); err != nil {
return nil, err
}
return mx, nil
}
func (u *Uwsgi) collectStats(mx map[string]int64, stats []byte) error {
var resp statsResponse
if err := json.Unmarshal(stats, &resp); err != nil {
return fmt.Errorf("failed to json decode stats response: %v", err)
}
// stats server returns an empty array if there are no workers
if resp.Workers == nil {
return fmt.Errorf("unexpected stats response: no workers found")
}
seen := make(map[int]bool)
mx["workers_tx"] = 0
mx["workers_requests"] = 0
mx["workers_harakiris"] = 0
mx["workers_exceptions"] = 0
mx["workers_respawns"] = 0
for _, w := range resp.Workers {
mx["workers_tx"] += w.TX
mx["workers_requests"] += w.Requests
mx["workers_harakiris"] += w.HarakiriCount
mx["workers_exceptions"] += w.Exceptions
mx["workers_respawns"] += w.RespawnCount
seen[w.ID] = true
if !u.seenWorkers[w.ID] {
u.seenWorkers[w.ID] = true
u.addWorkerCharts(w.ID)
}
px := fmt.Sprintf("worker_%d_", w.ID)
mx[px+"tx"] = w.TX
mx[px+"requests"] = w.Requests
mx[px+"delta_requests"] = w.DeltaRequests
mx[px+"average_request_time"] = w.AvgRT
mx[px+"harakiris"] = w.HarakiriCount
mx[px+"exceptions"] = w.Exceptions
mx[px+"respawns"] = w.RespawnCount
mx[px+"memory_rss"] = w.RSS
mx[px+"memory_vsz"] = w.VSZ
for _, v := range []string{"idle", "busy", "cheap", "pause", "sig"} {
mx[px+"status_"+v] = boolToInt(w.Status == v)
}
mx[px+"request_handling_status_accepting"] = boolToInt(w.Accepting == 1)
mx[px+"request_handling_status_not_accepting"] = boolToInt(w.Accepting == 0)
}
for id := range u.seenWorkers {
if !seen[id] {
delete(u.seenWorkers, id)
u.removeWorkerCharts(id)
}
}
return nil
}
func (u *Uwsgi) establishConn() (uwsgiConn, error) {
conn := u.newConn(u.Config)
if err := conn.connect(); err != nil {
return nil, err
}
return conn, nil
}
func boolToInt(b bool) int64 {
if b {
return 1
}
return 0
}
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