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docker-compose execコマンド実行しても反応しない

Posted at 2021-09-21

環境

Docker version 20.10.7
docker-compose version 1.29.2

$ docker-compose exec ruby -v
$

$ docker-compose execにサービス名を指定
今回は「app」

$ docker-compose exec app ruby -v
ruby 2.7.1p83 (2020-03-31 revision XXXXXXX) [x86_64-linux]

docker-compose.ymlで確認

docker-compose.yml

version: '3'
services:
  app: &app
    #(略)