Splunk：如何计算事件持续时间记录？

Question

我在 Splunk 中有以下事件：

_time                           Agent_Hostname      alarm               status
2020-08-23T03:04:05.000-0700    m50-ups.a_domain    upsAlarmOnBypass    raised
2020-08-23T03:07:16.000-0700    m50-ups.a_domain    upsTrapOnBattery    raised
2020-08-23T03:07:16.000-0700    m50-ups.a_domain    upsAlarmInputBad    raised
2020-08-23T03:07:39.000-0700    m50-ups.a_domain    upsAlarmOnBypass    raised
2020-08-23T03:07:39.000-0700    m50-ups.a_domain    upsAlarmLowBattery  raised
2020-08-23T03:08:17.000-0700    m50-ups.a_domain    upsTrapOnBattery    raised
2020-08-23T03:09:24.000-0700    m50-ups.a_domain    upsTrapOnBattery    raised
2020-08-23T03:10:31.000-0700    m50-ups.a_domain    upsAlarmOnBattery   cleared
2020-08-23T03:10:32.000-0700    m50-ups.a_domain    upsAlarmInputBad    cleared
2020-08-23T03:11:12.000-0700    m50-ups.a_domain    upsAlarmLowBattery  cleared
2020-08-23T03:19:06.000-0700    m50-ups.a_domain    upsAlarmInputBad    raised
2020-08-23T03:19:06.000-0700    m50-ups.a_domain    upsTrapOnBattery    raised
2020-08-23T03:19:13.000-0700    m50-ups.a_domain    upsAlarmLowBattery  raised
2020-08-23T03:20:10.000-0700    m50-ups.a_domain    upsTrapOnBattery    raised
2020-08-23T03:21:16.000-0700    m50-ups.a_domain    upsTrapOnBattery    raised
2020-08-23T03:22:22.000-0700    m50-ups.a_domain    upsTrapOnBattery    raised
2020-08-23T03:23:29.000-0700    m50-ups.a_domain    upsTrapOnBattery    raised
2020-08-23T03:24:28.000-0700    m50-ups.a_domain    upsAlarmInputBad    cleared
2020-08-23T03:24:28.000-0700    m50-ups.a_domain    upsAlarmOnBattery   cleared
2020-08-23T03:25:09.000-0700    m50-ups.a_domain    upsAlarmLowBattery  cleared
2020-08-23T03:25:58.000-0700    m50-ups.a_domain    upsAlarmOnBypass    cleared

我的问题是如何计算每个主机和每种警报类型的事件持续时间记录，例如，从上述事件中，我将通过算法获得以下结果，而不仅仅是对特定 examlpe 中的值进行硬编码：

start                        end                          Agent_Hostname   alarm
2020-08-23T03:04:05.000-0700 2020-08-23T03:25:58.000-0700 m50-ups.a_domain upsAlarmOnBypass
2020-08-23T03:07:16.000-0700                              m50-ups.a_domain upsTrapOnBattery
2020-08-23T03:07:16.000-0700 2020-08-23T03:24:28.000-0700 m50-ups.a_domain upsAlarmInputBad
2020-08-23T03:07:39.000-0700 2020-08-23T03:25:09.000-0700 m50-ups.a_domain upsAlarmLowBattery

其中 start 是主机警报首次发出的最早时间，并且 end是同alarm/host清零的时间

我的第二个问题是如何在那些封闭的跨度中找到最大的持续时间跨度，忽略那些没有结束时间的。

我的问题是如何在Splunk框架内实现？

Answer 1

transaction 命令可以处理其中的大部分。我唯一做不到的就是显示未完成的警报。

| makeresults 
| eval _raw="time                            Agent_Hostname      alarm               status
2020-08-23T03:04:05.000-0700    m50-ups.a_domain    upsAlarmOnBypass    raised
2020-08-23T03:07:16.000-0700    m50-ups.a_domain    upsTrapOnBattery    raised
2020-08-23T03:07:16.000-0700    m50-ups.a_domain    upsAlarmInputBad    raised
2020-08-23T03:07:39.000-0700    m50-ups.a_domain    upsAlarmOnBypass    raised
2020-08-23T03:07:39.000-0700    m50-ups.a_domain    upsAlarmLowBattery  raised
2020-08-23T03:08:17.000-0700    m50-ups.a_domain    upsTrapOnBattery    raised
2020-08-23T03:09:24.000-0700    m50-ups.a_domain    upsTrapOnBattery    raised
2020-08-23T03:10:31.000-0700    m50-ups.a_domain    upsAlarmOnBattery   cleared
2020-08-23T03:10:32.000-0700    m50-ups.a_domain    upsAlarmInputBad    cleared
2020-08-23T03:11:12.000-0700    m50-ups.a_domain    upsAlarmLowBattery  cleared
2020-08-23T03:19:06.000-0700    m50-ups.a_domain    upsAlarmInputBad    raised
2020-08-23T03:19:06.000-0700    m50-ups.a_domain    upsTrapOnBattery    raised
2020-08-23T03:19:13.000-0700    m50-ups.a_domain    upsAlarmLowBattery  raised
2020-08-23T03:20:10.000-0700    m50-ups.a_domain    upsTrapOnBattery    raised
2020-08-23T03:21:16.000-0700    m50-ups.a_domain    upsTrapOnBattery    raised
2020-08-23T03:22:22.000-0700    m50-ups.a_domain    upsTrapOnBattery    raised
2020-08-23T03:23:29.000-0700    m50-ups.a_domain    upsTrapOnBattery    raised
2020-08-23T03:24:28.000-0700    m50-ups.a_domain    upsAlarmInputBad    cleared
2020-08-23T03:24:28.000-0700    m50-ups.a_domain    upsAlarmOnBattery   cleared
2020-08-23T03:25:09.000-0700    m50-ups.a_domain    upsAlarmLowBattery  cleared
2020-08-23T03:25:58.000-0700    m50-ups.a_domain    upsAlarmOnBypass    cleared" 
| multikv forceheader=1 
| eval _time=strptime(time,"%Y-%m-%dT%H:%M:%S.%3N%z")
| fields _time Agent_Hostname alarm status 
```Everything above just defines test data - Remove Before Flight```
```Omit the reverse command if events are in descending order (the default)```
| reverse
```Set the start and end times based on status```
| eval start=if(status="raised",_time, NULL), end=if(status="cleared",_time, NULL)
```Define transactions based on "raised/cleared" pairs within host and alarm names```
| transaction Agent_Hostname alarm startswith="raised" endswith="cleared"
```Change duration display to hh:mm:ss```
| fieldformat duration=tostring(duration,"duration")
| table start end Agent_Hostname alarm duration

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