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Docker で Volume 名を変更する

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Docker では Volume 名の変更は気軽にできない。

変更できるようにしてほしいという要望は昔から上がっているが、今のところ実装される見込みはないようだ。

Rename docker volume · Issue #31154 · moby/moby

Issue でも言及されているが「新しい Volume に全てコピーして古い方を消す」ことで Volume 名の変更に相当する操作が行える。

$ docker volume create --name <new_volume>
$ docker run --rm -it -v <old_volume>:/from -v <new_volume>:/to alpine sh -c "cp -av /from/* /to"
$ docker volume rm <old_volume>
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