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JEAP 6 - Domain Controller 掛了怎麼辦?

JBoss EAP 有個Domain 模式,這個Domain 的模式有個總管理者, Domain Controller, 所有的啓動,設定都是會透過 Domain Controller 而動的。

以JBoss 而言,Domain Controller 如果掛掉,其實不會影響其他被管理的 JBoss 運作!
PS, 如果Domain Controller 掛掉,Host Controller 會一直出現這個retry 的log,



但是如果在極端的狀況下,剛好所有的機器因為停電的狀態下,都停止了,然後原先的Domain Controller 可能最近沒拜拜,運氣太差,突然起不來。




這時,有幾種做法,

1. 平時HA就有備份 Domain Controller 的機器,將這台HA的機器打開,使用原先Domain Controller的IP,這樣就可以無通接上去所有Host 使用,若是不能沿用舊的IP,那每台host 需要更新Domain Controller 最新的IP 位置即可。

2. 這個方法也是需要事先的一些備份動作,首先,在執行你的host(非 Domain Controller的機器) 啓動時,加上備份的指令先將Domain controller 先備份起來。(記得這個時候Domain Controller 要起來噢!)


./domain.sh --backup



之後,若Domain Controller 沒有開啓,這台Host 就可以用先前備份的資料起動JBoss 了。

./domain.sh --cached-dc




以上。





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