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@yuta_vamdemic(yuta)

Dockerfileのportsとexposeの違い

Posted at

ports

  • ホスト側のポートとコンテナ側のポートをマッピングする
  • ホスト側:コンテナ側

ports:
  - "3000:3000"

expose

  • コンテナ側のポートを指定
  • ホストには公開されず、docker0の仮想ブリッジネットワークにのみ公開される

expose:
  - "3000"

docker0

8: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default 
    link/ether 02:42:b9:e5:cd:08 brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
       valid_lft forever preferred_lft forever
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