| 1 | package workers |
| 2 | |
| 3 | import ( |
| 4 | "crypto/rand" |
| 5 | "database/sql" |
| 6 | "fmt" |
| 7 | "log" |
| 8 | "time" |
| 9 | |
| 10 | "github.com/robfig/cron/v3" |
| 11 | "github.com/stripsior/struxa/watchkeeper/internal/wings" |
| 12 | ) |
| 13 | |
| 14 | const scheduleInterval = 15 |
| 15 | |
| 16 | var cronParser = cron |
| 17 | |
| 18 | func RunScheduleWorker(db * |
| 19 | log.Println("[schedules] worker started, polling every 15s |
| 20 | scheduleTick(db) |
| 21 | for range time.Tick |
| 22 | scheduleTick(db) |
| 23 | } |
| 24 | } |
| 25 | |
| 26 | func scheduleTick(db * |
| 27 | due, err := |
| 28 | if err != nil |
| 29 | log.Printf("[schedules] tick error: |
| 30 | return |
| 31 | } |
| 32 | for _, s |
| 33 | go func(sched scheduleRow |
| 34 | if err := runSchedule |
| 35 | log.Printf("[schedules] schedule |
| 36 | } |
| 37 | }(s) |
| 38 | } |
| 39 | } |
| 40 | |
| 41 | type scheduleRow struct { |
| 42 | id string |
| 43 | name string |
| 44 | serverID string |
| 45 | cronSecond string |
| 46 | cronMinute string |
| 47 | cronHour string |
| 48 | cronDayOfWeek string |
| 49 | cronDayOfMonth string |
| 50 | } |
| 51 | |
| 52 | type taskRow struct { |
| 53 | id string |
| 54 | action string |
| 55 | payload string |
| 56 | timeOffset int |
| 57 | continueOnFail bool |
| 58 | } |
| 59 | |
| 60 | func fetchDueSchedules(db * |
| 61 | rows, err := |
| 62 | SELECT id, name, server_id, cron_second, cron_minute, cron_hour, cron_day_of_week, cron_day_of_month |
| 63 | FROM schedules |
| 64 | WHERE is_active=1 AND is_processing=0 AND next_run_at IS NOT NULL AND next_run_at<=NOW()`) |
| 65 | if err != nil |
| 66 | return nil, err |
| 67 | } |
| 68 | defer rows.Close() |
| 69 | var out []scheduleRow |
| 70 | for rows.Next() |
| 71 | var s scheduleRow |
| 72 | if err := rows |
| 73 | &s.cronSecond, |
| 74 | return nil, err |
| 75 | } |
| 76 | out = append( |
| 77 | } |
| 78 | return out, rows |
| 79 | } |
| 80 | |
| 81 | func fetchTasks(db * |
| 82 | rows, err := |
| 83 | SELECT id, action, payload, time_offset, continue_on_failure |
| 84 | FROM schedule_tasks WHERE schedule_id=? ORDER BY sequence_id ASC`, scheduleID) |
| 85 | if err != nil |
| 86 | return nil, err |
| 87 | } |
| 88 | defer rows.Close() |
| 89 | var out []taskRow |
| 90 | for rows.Next() |
| 91 | var t taskRow |
| 92 | if err := rows |
| 93 | return nil, err |
| 94 | } |
| 95 | out = append( |
| 96 | } |
| 97 | return out, rows |
| 98 | } |
| 99 | |
| 100 | func runSchedule(db * |
| 101 | var serverUUID, nodeFQDN |
| 102 | var nodeListen int |
| 103 | err := db. |
| 104 | SELECT srv.uuid, n.fqdn, n.scheme, n.daemon_listen, n.token |
| 105 | FROM servers srv JOIN nodes n ON srv.node_id=n.id WHERE srv.id=?`, sched.serverID |
| 106 | Scan(&serverUUID, |
| 107 | if err != nil |
| 108 | return fmt.Errorf( |
| 109 | } |
| 110 | |
| 111 | tasks, err := |
| 112 | if err != nil |
| 113 | return fmt.Errorf( |
| 114 | } |
| 115 | |
| 116 | if _, err |
| 117 | return fmt.Errorf( |
| 118 | } |
| 119 | |
| 120 | log.Printf("[schedules] running schedule |
| 121 | |
| 122 | client := wings. |
| 123 | taskErr := executeTasks( |
| 124 | |
| 125 | nextRun := computeNextRun( |
| 126 | if _, err |
| 127 | `UPDATE schedules SET is_processing=0, last_run_at=?, next_run_at=? WHERE id=?`, |
| 128 | time.Now(), |
| 129 | ); err != |
| 130 | log.Printf("[schedules] failed to finalise schedule |
| 131 | } |
| 132 | return taskErr |
| 133 | } |
| 134 | |
| 135 | func executeTasks(client * |
| 136 | for _, t |
| 137 | if t.timeOffset |
| 138 | time.Sleep(time |
| 139 | } |
| 140 | if err := executeTask |
| 141 | log.Printf("[schedules] task |
| 142 | if !t.continueOnFail |
| 143 | return err |
| 144 | } |
| 145 | } |
| 146 | } |
| 147 | return nil |
| 148 | } |
| 149 | |
| 150 | func executeTask(client * |
| 151 | switch t.action |
| 152 | case "power": |
| 153 | return client.SendPowerAction( |
| 154 | case "command": |
| 155 | return client.SendCommands( |
| 156 | case "backup": |
| 157 | return client.CreateBackup( |
| 158 | UUID: newUUID(), |
| 159 | Adapter: "wings", |
| 160 | }) |
| 161 | default: |
| 162 | log.Printf("[schedules] unknown task action: |
| 163 | return nil |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | func computeNextRun(sched scheduleRow |
| 168 | // 6-field cron: second minute hour dayOfMonth * dayOfWeek |
| 169 | expr := fmt. |
| 170 | sched.cronSecond, sched |
| 171 | s, err := |
| 172 | if err != nil |
| 173 | return nil |
| 174 | } |
| 175 | next := s. |
| 176 | if next.IsZero() |
| 177 | return nil |
| 178 | } |
| 179 | return &next |
| 180 | } |
| 181 | |
| 182 | func newUUID() string |
| 183 | var b [16] |
| 184 | _, _ = |
| 185 | b[6] = |
| 186 | b[8] = |
| 187 | return fmt.Sprintf( |
| 188 | } |