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Aurora、クラスタ構成でホスト名にアクセスした時、ping 打つ毎にIPアドレスが変わるのを確認する

Last updated at Posted at 2018-10-30

↓のクラスタ構成の時に、
image.png

エンドポイントが↓になってて、
image.png

読み込みエンドポイントにping打つと、pingのタイミングによってIPアドレスが変わってる確認。

[ec2-user@ip-172-31-37-104 ~]$ ping mydbinstance-cluster-1.cluster-ro-c32g4nbcrsih.ap-northeast-1.rds.amazonaws.com
PING mydbinstance2.c32g4nbcrsih.ap-northeast-1.rds.amazonaws.com (172.31.10.31) 56(84) bytes of data.

[ec2-user@ip-172-31-37-104 ~]$ ping mydbinstance-cluster-1.cluster-ro-c32g4nbcrsih.ap-northeast-1.rds.amazonaws.com
PING mydbinstance3.c32g4nbcrsih.ap-northeast-1.rds.amazonaws.com (172.31.31.214) 56(84) bytes of data.

[ec2-user@ip-172-31-37-104 ~]$ ping mydbinstance-cluster-1.cluster-ro-c32g4nbcrsih.ap-northeast-1.rds.amazonaws.com
PING mydbinstance3.c32g4nbcrsih.ap-northeast-1.rds.amazonaws.com (172.31.31.214) 56(84) bytes of data.

[ec2-user@ip-172-31-37-104 ~]$ ping mydbinstance-cluster-1.cluster-ro-c32g4nbcrsih.ap-northeast-1.rds.amazonaws.com
PING mydbinstance2.c32g4nbcrsih.ap-northeast-1.rds.amazonaws.com (172.31.10.31) 56(84) bytes of data.

※クラスターエンドポイントの方には何回ping打っても同じIPアドレス

備考

故にコネクションプール張りっぱなしにして大丈夫です?っていう話につながる。
※最初に取得したIPアドレスにつなぎっぱなしにして良いのか問題

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