AWS現在偵測到可用區域出現潛在故障時,可自動轉移用戶流量到其他區域
· 2023-12-01

AWS區域自動轉移(Zonal Autoshift)功能會自動偵測可用區域的潛在故障,並自動轉移用戶工作負載流量,確保應用程式的可用性和韌性

這個過程有多重保障措施,確保不會降低應用程式的可用性,AWS也有內部控制確保用戶一次只會從一個可用區域轉移流量。AWS每周都會在基礎設施上演練轉移30分鐘,演練結束根據應用程式運作狀況,提供用戶成功或是失敗的結果。

用戶可以定義不希望進行轉移的時間段,同時還可以設定兩個Amazon CloudWatch警報在執行期間充當斷路器,一個是阻擋演練執行,另一個則是在演練執行期間監控應用程式運作狀況,當其中一個警報觸發,AWS會立即停止演練,並恢復所有可用區流量

用戶在啟用區域自動轉移時,需要確保所有可用區域都要部署足夠容量,以承受在特定可用區域故障時所產生的流量轉移。不過,在所有可用區域部署額外容量會產生成本,用戶需要在應用程式的可用性和成本之間權衡。目前,區域自動轉移在中國和GovCloud之外的所有AWS地區中提供。

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