Linux
為 mcelog 編寫觸發器
剛開始
mcelog第一次研究（我之前已經啟用它並看到了 syslog 輸出，但這是我第一次嘗試做一些非預設的事情）。我正在尋找有關如何為其編寫觸發器的資訊。具體來說，我正在尋找可以對哪些類型的事件mcelog做出反應，它如何決定執行哪些腳本等等。我可以從範例觸發器中得到的最好的結果是它在呼叫腳本之前設置了一堆環境變數。那麼它是否只是嘗試執行觸發器目錄（/etc/mcelog在 RHEL 上）中的所有內容並讓腳本決定它想要執行的操作？我見過其他名稱看起來像 MCE 事件的觸發器腳本，這是約定還是有特殊功能？我創建了一個名為的觸發器
/etc/mcelog/joel.sh，它只向我的 gmail 帳戶發送一封基本電子郵件。幾天前顯然觸發器關閉了，因為我沒有手動執行腳本就收到了來自腳本的電子郵件。我沒想過將env輸出通過管道傳遞給mailx命令，joel.sh所以我不知道是什麼硬體事件觸發了腳本執行，也不知道為什麼mcelog選擇joel.sh作為腳本來執行它。基本上，我正在尋找一個答案，它會給我一個基本的方向
mcelog，它是觸發系統，以及我如何使用它來監控我的硬體健康狀況。我敢肯定，一旦我掌握了方向，我就能找出更高級的東西。
查看範例
mcelog.conf配置文件，它看起來包含大多數（如果不是全部）它可以處理的觸發器類型。DIMM
[dimm] # # execute these triggers when the rate of corrected or uncorrected # errors per DIMM exceeds the threshold # Note when the hardware does not report DIMMs this might also # be per channel # The default of 10/24h is reasonable for server quality· # DDR3 DIMMs as of 2009/10 #uc-error-trigger = dimm-error-trigger uc-error-threshold = 1 / 24h #ce-error-trigger = dimm-error-trigger ce-error-threshold = 10 / 24h插座
[socket] # Threshold and trigger for uncorrected memory errors on a socket # mem-uc-error-trigger = socket-memory-error-trigger mem-uc-error-threshold = 100 / 24h # Threshold and trigger for corrected memory errors on a socket mem-ce-error-trigger = socket-memory-error-trigger mem-ce-error-threshold = 100 / 24h記憶體
[cache] # Processing of cache error thresholds reported by Intel CPUs cache-threshold-trigger = cache-error-trigger頁
[page] # Memory error accouting per 4K memory page # Threshold for the correct memory errors trigger script memory-ce-threshold = 10 / 24h # Trigger script for corrected errors # memory-ce-trigger = page-error-trigger觸發器
可以在此部分控制觸發器。
[trigger] # Maximum number of running triggers children-max = 2 # execute triggers in this directory directory = /etc/mcelog範例觸發器
mcelog github 頁面上有一些範例觸發器。
範例觸發腳本，
dimm-error-triggers：#!/bin/sh # This shell script can be executed by mcelog in daemon mode when a DIMM # exceeds a pre-configured error threshold # # environment: # THRESHOLD human readable threshold status # MESSAGE Human readable consolidated error message # TOTALCOUNT total count of errors for current DIMM of CE/UC depending on # what triggered the event # LOCATION Consolidated location as a single string # DMI_LOCATION DIMM location from DMI/SMBIOS if available # DMI_NAME DIMM identifier from DMI/SMBIOS if available # DIMM DIMM number reported by hardware # CHANNEL Channel number reported by hardware # SOCKETID Socket ID of CPU that includes the memory controller with the DIMM # CECOUNT Total corrected error count for DIMM # UCCOUNT Total uncorrected error count for DIMM # LASTEVENT Time stamp of event that triggered threshold (in time_t format, seconds) # THRESHOLD_COUNT Total umber of events in current threshold time period of specific type # # note: will run as mcelog configured user # this can be changed in mcelog.conf logger -s -p daemon.err -t mcelog "$MESSAGE" logger -s -p daemon.err -t mcelog "Location: $LOCATION" [ -x ./dimm-error-trigger.local ] && . ./dimm-error-trigger.local exit 0參考