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Metro winner掉線時手動從對端恢復(fù)IO

說明：

當(dāng)VPLEX Metro因無第三機(jī)房沒有配置Witness時，winner集群宕機(jī)時且無法及時恢復(fù)時，需手動從對端拉起業(yè)務(wù)，恢復(fù)I/O。

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場景描述：

假定客戶業(yè)務(wù)在VPLEX Cluster-1，分布式卷的一致性組設(shè)置winner為cluster-1，業(yè)務(wù)服務(wù)器由VPLEX cluster-1前端口提供存儲。

此時VPLEX cluster-1 及其連接主機(jī)和存儲宕機(jī)，暫時無法恢復(fù)業(yè)務(wù)，需要從VPLEX cluster-2及其后端存儲和前端服務(wù)器恢復(fù)業(yè)務(wù)。

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VPLEX端操作：

登陸VPLEX cluster-2的CLI管理界面，用戶名密碼為service/P@ssw0rd，切換到vplexcli模式下。

service@vplex02:~> vplexcli

Trying ::1...

Connected to localhost.

Escape character is '^]'.

將目錄切換到所需要恢復(fù)的一致性組下,并使用ll查看此一致性組狀態(tài)

VPlexcli:/>cd /cluster/cluster-2/consistency-groups/UNITY500_25T

VPlexcli: /cluster/cluster-2/consistency-groups/UNITY500_25T>ll

Attributes:

Name????????????????? Value

--------------------? ---------------------------------------------------------

active-clusters?????? []

cache-mode?????? ?????synchronous

detach-rule?????????? winner cluster-1 after 5s

operational-status??? [(cluster-1, { summary:: degraded,details:: [member-volumes-unreachable] }), (cluster-2, { summary:: suspended, details:: [cluster-departure] })]

passive-clusters????? []

read-only???????????? false

recoverpoint-enabled? false

storage-at-clusters?? [cluster-1, cluster-2]

virtual-volumes?????? [UNITY500_25T]

visibility??????????? [cluster-1, cluster-2]

Contexts:

Name????????? Description

------------? -----------

advanced????? -

recoverpoint? -

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查看operation-status，顯示cluster-1的卷已經(jīng)不可達(dá)，此時需要從cluster-2恢復(fù)I/O，則需要手動設(shè)置cluster-2為臨時winner。

VPlexcli:/clusters/cluster-1/consistency-groups/UNITY500_25T> choose-winner cluster-2

?????????????????????????????????????????????????????????? ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????

WARNING: This can cause data divergence and lead to data loss. Ensure the other cluster is not serving I/O for this consistency group before continuing. Continue?? (Yes/No) yes

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此時VPLEX cluster-2已恢復(fù)I/O，cluster-2前端服務(wù)器可訪問存儲，此時可進(jìn)行主機(jī)操作恢復(fù)業(yè)務(wù)。

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主機(jī)端操作：

??????? 1）當(dāng)主機(jī)環(huán)境為Metro兩端主機(jī)Oracle RAC時，只需VPLEX恢復(fù)I/O后拉起服務(wù)即可。

2）當(dāng)主機(jī)環(huán)境為Metro兩端為VMware虛擬化開啟HA且兩端主機(jī)在同一集群內(nèi)時，只需VPLEX恢復(fù)I/O后重啟虛擬機(jī)即可。

3）當(dāng)Metro兩端為獨(dú)立服務(wù)器時，VPLEX恢復(fù)I/O后，需重新識別存儲后再拉起服務(wù)。

4）當(dāng)Metro兩端為VMware兩個集群，VPLEX恢復(fù)I/O后，需要從原有集群中關(guān)閉虛擬機(jī)并從清單中刪除，對端VMware集群重新識別存儲后，從儲存內(nèi)找到虛擬機(jī)xms文件，右鍵添加到清單中，然后即可打開虛擬機(jī)。

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恢復(fù)Cluster-1后解決沖突分離

當(dāng)VPLEX cluster-1從災(zāi)難中恢復(fù)后，VPLEX兩個集群會恢復(fù)連接，此時查看一致性組狀態(tài)如下：

Plexcli:/clusters/cluster-1/consistency-groups/UNITY500_500G> ll??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????

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Attributes:

Name????????????????? Value

--------------------? ---------------------------------------------------------

active-clusters?????? []

cache-mode??????????? synchronous

detach-rule?????????? winner cluster-1 after 5s

operational-status??? [(cluster-1, {summary:: degraded, details::[requires-resolve-conflicting-detach] }), (cluster-2, { summary:: degraded, details::[requires-resolve-conflicting-detach] })]

passive-clusters????? []

read-only???????????? false

recoverpoint-enabled? false

storage-at-clusters?? [cluster-1, cluster-2]

virtual-volumes?????? [UNITY500_25T]

visibility??????????? [cluster-1, cluster-2]

Contexts:

Name????????? Description

------------? -----------

advanced????? -

recoverpoint? -

查看operation-status，顯示cluster-1和cluster-2，顯示需要解決沖突分離

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使用命令“resolve-conflicting-detach”解決沖突分離

VPlexcli:/clusters/cluster-1/consistency-groups/UNITY500_25T>resolve-conflicting-detach -c cluster-2?????????????????????????????????

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This will cause I/O to suspend at clusters in conflict with cluster cluster-2, allowing you to stop applications at those clusters. Continue?? (Yes/No) yes

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注：此命令將作用在兩個集群上重新同步數(shù)據(jù)映像，-c后的參數(shù)為要保留的源的集群，此時cluster-2已經(jīng)有業(yè)務(wù)運(yùn)行，所以要保留cluster-2的數(shù)據(jù)，所以參數(shù)為cluster-2

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再次查看一致性組狀態(tài)，VPLEX 兩端集群狀態(tài)恢復(fù)。

VPlexcli:/clusters/cluster-1/consistency-groups/UNITY500_500G> ll?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? ????????????

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Attributes:

Name????????????????? Value

--------------------? ---------------------------------------------------------

active-clusters?????? []

cache-mode??????????? synchronous

detach-rule?????????? winner cluster-2 after 5s

operational-status??? [(cluster-1,{ summary:: ok, details:: [] }), (cluster-2,{summary:: ok, details:: [] })]

passive-clusters????? []

read-only???????????? false

recoverpoint-enabled? false

storage-at-clusters?? [cluster-1, cluster-2]

virtual-volumes???? ??[UNITY500_500G]

visibility??????????? [cluster-1, cluster-2]

Contexts:

Name????????? Description

------------? -----------

advanced????? -

recoverpoint? -????????

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此時即可通過主機(jī)層在線遷移數(shù)據(jù)回需要的一端。