ngixn負載均衡高可用-主備切換keepalived實現

1.環境 操作系統 CentOS release 6.10 (Final) 主機規劃 IP 用途 192.168.47.110 nginx + keepalived master(主) 192.168.47.21 nginx + keepalived backup(備) 192.168.47.20 vip，對外提供服務訪問IP 訪問流程 2.安裝keepalived 主和備機都需要安裝好nginx

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