はじめに
Docker Desktopで使用している仮想領域について圧縮した。
その時の手順を記録しておく。
環境
Windows 11 Professional
Docker Desktop 4.35.1 (173168)
WSL2仮想領域について
自分が利用している、Docker Desktopは WSL2を使用している。
そのため、以下の特徴がある。
自動拡張 仮想ディスクは初期サイズから必要に応じて自動的に拡張される。
たとえば、コンテナのイメージやボリュームデータを追加すると、そのデータ量に応じてサイズが増加する。自動縮小されない
一度拡張された仮想ディスクのサイズは、データを削除しても自動的には縮小されない。 ディスクサイズを縮小するには、手動で圧縮操作が必要となる。
※仮想ディスクの最大サイズは、ファイルシステムの上限や、物理ディスク容量に依存する。
上記の特徴があるため、自動拡張されたものに対して圧縮を行う必要がある。
現状の調査
C:\Users\[ユーザー]\AppData\Local\Docker\wsl\disk にあるdocker_data.vhdx を確認する。
67.2GBあった。
ext4.vhdxについては、C:\Users\[ユーザー]\AppData\Local\Docker\wsl\main にあるext4.vhdx となる。
Dockerから不要なデータを削除する
当然だが、自動拡張しているので不要なデータがあれば削除しておく必要がある。
docker system df でどのくらい使用しているかを確認。
docker system dfTYPE TOTAL ACTIVE SIZE RECLAIMABLE
Images 39 5 50.21GB 40.09GB (79%)
Containers 5 1 1.816GB 1.542GB (84%)
Local Volumes 13 3 6.882GB 2.221GB (32%)
Build Cache 231 0 706.4MB 706.4MBdocker system prune -a --volumes を実行する。
-a: 未使用のイメージや停止中のコンテナも削除--volumes: 未使用のボリュームも削除
docker system prune -a --volumesログ
docker system prune -a --volumes ✔ │ 20:14:05
WARNING! This will remove:
- all stopped containers
- all networks not used by at least one container
- all anonymous volumes not used by at least one container
- all images without at least one container associated to them
- all build cache
Are you sure you want to continue? [y/N] y
Deleted Containers:
ab1d060932b7f11f39f57ba94392e779e399a124eb670b3ca86e229682ad9945
8307d100a3c9c49aa3938cc242c4a512dff99b73acb25d17924f7197ae9fa21e
4e13bfeeaf79aff6d5b4af54bc7accaba065a6ab275a47058ef1d903044dd2a9
e402e293aaffaab55a97f62ae2c25e96efdffe7d61ddee41af210999dd0e85d7
Deleted Networks:
postgresql_default
whisper-from-movie_default
google-cloud-sdk-php_default
dockercompose15759951289022963531_default
Deleted Volumes:
3acf3f698fb0c570adce31d753e56eeeb481b70a980769447a72a0531f85edab
9364348c1bec93c8b158596019662c98e02111ea93c01de15f97b86ba9fc8ed8
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744818ee9045b81dd00158a4e8541fbd55d2427d7ac489f677e10c384dcc66e8
Deleted Images:
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untagged: alpine:3.16.3
untagged: alpine@sha256:b95359c2505145f16c6aa384f9cc74eeff78eb36d308ca4fd902eeeb0a0b161b
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deleted: sha256:8d1f21fea455adde4a1811ad7f43cd16bd1a2336933c1c702afa7cb8d9be806e
untagged: wordpress:6.6.1-php8.3-fpm
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untagged: vsc-blog-hugo-af8adb49b770e8aaf8721666bd08776d881c75ac215e040756eefdfb91959673-features:latest
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untagged: vuesampleapplicationserver:dev
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untagged: google-cloud-sdk-php-app:latest
deleted: sha256:ffea3e92dc5bbd4849d6b59ee0a78065f2569bc1d6b75ce291efd5a3cd181c7d
untagged: ngrok/ngrok:3.15.0-debian
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untagged: whisper-from-movie-app:latest
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untagged: debian:bookworm-slim
untagged: debian@sha256:5f7d5664eae4a192c2d2d6cb67fc3f3c7891a8722cd2903cc35aa649a12b0c8d
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untagged: nginx:1.27.0
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untagged: google-cloud-sdk-php-nginx:latest
deleted: sha256:3f2b64d6bb0efde2e727e27ce734ff5fa9c5383a088489b77407436384f64250
untagged: vsc-volume-bootstrap:latest
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untagged: nginx:1.27.1
untagged: nginx@sha256:135fbc7ed19c8f644ddf678e68292e678696908451dad7ee2fd4e0cf861f4b6f
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untagged: dood-test-monitor:latest
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deleted: sha256:07b64dccf40e52298d7aae7b477225f446e0e75e6be6c9781ad4f81c83950ab6
untagged: mcr.microsoft.com/dotnet/aspnet:8.0
untagged: mcr.microsoft.com/dotnet/aspnet@sha256:3ded9ccf06f222ec934311be4f9facda83d144331c028340e3a694733cad7d4b
deleted: sha256:83cdfadb813c18b944329e9e8aab5a3c8961b26b11b123f9872a81b5f04fd8cb
untagged: mysql:8.4
untagged: mysql@sha256:a21ca6952f45280c948fec709d499acffec0dbc2a55817e1ef866bd6fc12c01b
deleted: sha256:5c0b42e12aecf9923bc295d49e2b8904d827bca6d7275714339995b6bdf8850c
deleted: sha256:5de43e12f908ba47cee52810ba9d9acd33b4d8efb462d9aeb5c78182ab5e5f71
deleted: sha256:0eb93bc34aaec2abf86696dd09ebccfc32953fe31435a07e313b628b74c7ea29
deleted: sha256:5d7c68e1d5def09d9204ce38b06a542414a81df8111401e63d54fb49e7e27dd8
deleted: sha256:d9effad63f4fe9c0cd768663f68c4f20bc052186bc806a909fb1af0a1045b873
deleted: sha256:7f312fe46cf63fc3667d7f7c84d96d9c4ea1e9fc43c5092882696ae9cc88de70
deleted: sha256:e645d17136d413e35fefa113e77f203bd047dcd4007b949baf8b09425c1f3edb
deleted: sha256:c5597ed60bfc70dfff05283ca07ecf41ddfd35d5a992f825c1849df76a978e59
deleted: sha256:dafc370e53a58ee962bc8e158a1dbc72c2a3bf498e490d914d2199943352408b
deleted: sha256:f6da307280c365705fbcb50474fb372a0294860b2cf2d3596ee06fb89520983d
deleted: sha256:a8a0603d3582fde57730d0232780a838cc6e5c83d4bab354ebfbcc741409e634
Deleted build cache objects:
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Total reclaimed space: 40.69GBdocker builder pruneでビルドキャッシュを削除する。
※ docker system pruneで消されているっぽい。
docker builder pruneWARNING! This will remove all dangling build cache. Are you sure you want to continue? [y/N] y
Total: 0B上記の実行後に、docker system dfで確認をする。
docker system dfTYPE TOTAL ACTIVE SIZE RECLAIMABLE
Images 1 1 1.172GB 0B (0%)
Containers 1 1 274MB 0B (0%)
Local Volumes 7 2 5.628GB 1.007GB (17%)
Build Cache 0 0 0B 0Bほとんど消えた。
けど、仮想領域自体は変わらないまま。
仮想領域を圧縮する
Docker Desktop を停止: Docker Desktop を完全に停止する
WSL をシャットダウン: PowerShell を管理者権限で実行する。
その後、下記のコマンドを実行する。
wsl --shutdown圧縮する
Optimize-VHD -Path "C:\Users\[ユーザー]\AppData\Local\Docker\wsl\main\ext4.vhdx" -Mode Full
Optimize-VHD -Path "C:\Users\[ユーザー]\AppData\Local\Docker\wsl\disk\docker_data.vhdx" -Mode Full実施中↓
Docker Desktopなどの再起動
Docker Desktop を起動する。
圧縮後の容量確認
Get-ChildItem "C:\Users\[ユーザー]\AppData\Local\Docker\wsl\disk\docker_data.vhdx" | Select-Object Name, Length67.2GB→15.9GBまで削減できた。
Name Length
---- ------
docker_data.vhdx 17103323136
補足
- Docker デスクトップ 4.34: MSI インストーラーの GA、アップグレードされたホスト ネットワーク、および生産性と管理を向上させるための強力な機能強化
https://www.docker.com/ja-jp/blog/docker-desktop-4-34/
参考
仮想ディスクが肥大化してディスク容量が枯渇したので解消してみた
https://dev.classmethod.jp/articles/windows-virtual-disk-compression/【最適化・格納先変更】Docker 肥大化したext4.vhdxの対処方法
https://zenn.dev/haretokidoki/articles/49dacc3516c441
おわりに
Docker Desktopで自動拡張される部分の圧縮を行った。
でかいイメージを一旦使ったり、ボリュームを大量に使った後に削除しても自動拡張されっぱなしなので、圧縮する必要があることを知れてよかった。
業務でこのあたり苦しんでいたので解決できてよかった。