Docker 吃掉硬碟空間處理

•  參考 stackoverflow 的 Is it safe to clean docker/overlay2/
• 清除 ArchLinux 的 pacman cache，rumansaleem/clean-up-arch-linux.md

docker container 的 log 會無限成長，可以有好幾個 GB，只能手動刪除。

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# du -h -d 1

7.6G ./usr

47G ./var

# du /var/ -h -d 1

6.9G /var/cache

509M /var/log

40G /var/lib

# du /var/cache/ -h -d 1

942M /var/cache/debtap

5.6G /var/cache/pacman

387M /var/cache/pkgfile

6.9G /var/cache/

# pacman -Sc

Packages to keep:

  All locally installed packages

Cache directory: /var/cache/pacman/pkg/

:: Do you want to remove all other packages from cache? [Y/n] 

removing old packages from cache...

error: missing package metadata in /var/cache/pacman/pkg/unzip-6.0-20-x86_64.pkg.tar.zst.part

Database directory: /var/lib/pacman/

:: Do you want to remove unused repositories? [Y/n] 

removing unused sync repositories...

# du /var/cache/ -h -d 1

3.2M /var/cache/samba

80K /var/cache/ldconfig

942M /var/cache/debtap

2.1G /var/cache/pacman

387M /var/cache/pkgfile

4.0K /var/cache/private

1.1M /var/cache/fontconfig

3.4G /var/cache/

# du -h -d 1

4.1M ./f61f4a601db2be573c2b6351a04fcf1e79540e3cd8e1de41c6c9ab4a0fa204e0

48K ./2136c92af607bfee2ca204d3c77843dce66d7706f753e944dbe84820cf72c5ee

40K ./dc1f8e5f1fb6be942dad52e52453e2960d3bedf788f1774ddfe4462a03c66dc3

21G ./f3c5128d570fec0021b34ff8650fe9dcc531a2bcc59feb52aa9ff1e3f87b7e39

10M ./a3aefcd51740895bb721982b2dff7bfbcea164290b626a1dfb226b3a85274e50

dc1f8e5f1fb6 ==> nginx-hls-vod-server-web

清除所有 container 的 log

# truncate -s 0 /var/lib/docker/containers/*/*-json.log

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可以設 option，限制log 的大小。

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file: /etc/docker/daemon.json

{

  "log-opts": {

    "max-size": "20m",

    "max-file": "5"

  }

}

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