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簡單龍HA問題
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Roy
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Apr 27, 2014, 10:48:02 PM
4/27/14
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目前架構看起來有單點故障風險
想採用DRBD+Heartbeat來達成Master高可用性
請問除MFS服務(/var/mfs)需用DRBD同步外
還有什麼服務、資料也需同步以維持Master正常運作?
Jonathan Chen
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Apr 29, 2014, 10:17:39 PM
4/29/14
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主要是/var/lib/one中的one.db 資料需要備份。
Jonathan
Yu Max
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May 1, 2014, 11:36:12 AM
5/1/14
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MooseFS本身的架構是有設計備援的
您可以嘗試建立mfs metalog server
http://www.moosefs.org
但我不確定它是否能達到高可用性
或許會有一定的中斷時間
這部分不一定要用DRBD來實作
核心服務one確實沒有HA的設計
不過one只是用來管理VM
即使one服務中斷,所有執行中的VM並不會受到影響,仍可正常運行
以上資訊供您參考
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Roy
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May 1, 2014, 9:25:29 PM
5/1/14
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感謝回覆
看one設定檔,發現支援mysql,
可能會朝向使用mysql同步來處理。
Jonathan Chen於 2014年4月30日星期三UTC+8上午10時17分39秒寫道:
主要是/var/lib/one中的one.db 資料需要備份。
Jonathan
Roy
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May 1, 2014, 9:35:23 PM
5/1/14
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感謝回覆
metalog架構,master故障時,
目前看文件,需使用mfsmetarestore來還原?
而且mfs-client需重新掛載(IP變更)
one是管理VM,目前是擔心master故障,
VM雖還在運作,slave能加入新master接受控管?
Yu Max於 2014年5月1日星期四UTC+8下午11時36分12秒寫道:
Yu Max
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May 13, 2014, 1:21:11 PM
5/13/14
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您好
不確定您的系統需要多高程度的HA
實務上我們有可能把master上的分散式檔案系統主節點(MooseFS master)拆到獨立機器上作維護
所謂的master故障要看到底是如何故障
基本上如果所有環境設定都等同於原master的話
應該是可以接回去重新控管的
所以硬碟壞掉應該是不被容許的,除非你有辦法重建一樣的環境
以上指的是one核心部分
分散式檔案系統的話
如果你非常需要HA
建議你可以評估以Ceph取代MooseFS
http://ceph.com
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