Closed
Description
I'd like to know why docker uses so much disk, even after removing all containers, images, and volumes.
It looks like this "diff" has a layer, but the layer isn't referenced by anything at all.
/var/lib/docker/aufs/diff# du-summary
806628 c245c4c6d71ecdd834974e1e679506d33c4aac5f552cb4b28e727a596efc1695-removing
302312 a8001a0e9515cbbda89a54120a89bfd9a3d0304c8d2812401aba33d22a2358ea
302304 957e78f9f9f4036689734df16dabccb98973e2c3de0863ef3f84de85dca8d92d
302256 8db1d610f3fbc71415f534a5d88318bbd2f3f783375813f2288d15f15846d312
288204 ac6b8ff4c0e7b91230ebf4c1caf16f06c1fdceff6111fd58f4ea50fc2dd5050b
288180 04a478c413ea80bcfa7f6560763beef991696eace2624254479e5e5dd69708c6
287804 d033ab6e4e5231dc46c6c417c680b239bb0e843024738517cbb0397128e166ca
233420 8e21143dca49e30cae7475b71b5aee9b92abe2069fbb9ab98ce9c334e3f6d4fa
212668 a631b94f7a2d5d21a96a78e9574d39cdeebbc81b51ac6c58bd48dc4045656477
205120 ae13341f8c08a925a95e5306ac039b0e0bbf000dda1a60afb3d15c838e43e349
205120 8d42279017d6095bab8d533ab0f1f7de229aa7483370ef53ead71fe5be3f1284
205116 59b3acd8e0cfd194d44313978d4b3769905cdb5204a590069c665423b10150e3
205116 040af0eee742ec9fb2dbeb32446ce44829cd72f02a2cf31283fcd067e73798ab
158024 ef0a29ff0b515c8c57fe78bcbd597243de9f7b274d9b212c774d91bd45a6c9b1
114588 061bd7e021afd4aaffa9fe6a6de491e10d8d37d9cbe7612138f58543e0985280
114576 149e8d2745f6684bc2106218711991449c452d4c7e6203e2a0f46651399162b0
114532 52b28112913abb0ed1b3267a0baa1cacd022ca6611812d0a8a428e61ec399589
114300 52475beba19687a886cba4bdb8508d5aaf051ceb52fb3a65294141ab846c8294
76668 4e6afb958b5ee6dea6d1a886d19fc9c780d4ecc4baeebfbde31f9bb97732d10d
76640 c61340c6a962ddd484512651046a676dbbc6a5d46aecc26995c49fe987bf9cdc
/var/lib/docker/aufs/diff# du -hs a8001a0e9515cbbda89a54120a89bfd9a3d0304c8d2812401aba33d22a2358ea
296M a8001a0e9515cbbda89a54120a89bfd9a3d0304c8d2812401aba33d22a2358ea
$ docker-find a8001a0e9515cbbda89a54120a89bfd9a3d0304c8d2812401aba33d22a2358ea
+ docker=/var/lib/docker
+ sudo find /var/lib/docker '(' -path '/var/lib/docker/aufs/diff/*' -o -path '/var/lib/docker/aufs/mnt/*' ')' -prune -o -print
+ grep a8001a0e9515cbbda89a54120a89bfd9a3d0304c8d2812401aba33d22a2358ea
/var/lib/docker/aufs/layers/a8001a0e9515cbbda89a54120a89bfd9a3d0304c8d2812401aba33d22a2358ea
+ sudo find /var/lib/docker '(' -path '/var/lib/docker/aufs/diff/*' -o -path '/var/lib/docker/aufs/mnt/*' ')' -prune -o -type f -print0
+ sudo xargs -0 -P20 grep -l a8001a0e9515cbbda89a54120a89bfd9a3d0304c8d2812401aba33d22a2358ea
/var/lib/docker/aufs/layers/993e4988c510ec3ab4f6d139740a059df40585576f8196817e573a9684554c5c
/var/lib/docker/aufs/layers/95e68d59a8704f2bb52cc1306ca910ddb7af8956eb7c57970fcf7d8b3d9baddb
/var/lib/docker/aufs/layers/4e6afb958b5ee6dea6d1a886d19fc9c780d4ecc4baeebfbde31f9bb97732d10d
/var/lib/docker/aufs/layers/fd895b6f56aedf09c48dba97931a34cea863a21175450c31b6ceadde03f7b3da
/var/lib/docker/aufs/layers/ac6b8ff4c0e7b91230ebf4c1caf16f06c1fdceff6111fd58f4ea50fc2dd5050b
/var/lib/docker/aufs/layers/f3286009193f95ab95a16b2561331db06803ac536cea921d9aa64e1564046579-init
/var/lib/docker/aufs/layers/d5bbef5adf2efb6f15d4f96c4bee21beb955255d1ec17baf35de66e98e6c7328
/var/lib/docker/aufs/layers/9646360df378b88eae6f1d6288439eebd9647d5b9e8a471840d4a9d6ed5d92a4
/var/lib/docker/aufs/layers/cf9fd1c4a64baa39b6d6d9dac048ad2fff3c3fe13924b07377e767eed230ba9f
/var/lib/docker/aufs/layers/f3286009193f95ab95a16b2561331db06803ac536cea921d9aa64e1564046579
/var/lib/docker/aufs/layers/23ce5a473b101d85f0e9465debe5a0f3b8a2079b99528a797b02052d06bc11d8
/var/lib/docker/image/aufs/layerdb/sha256/d1c659b8e3d0e893e95c8eedc755adcb91a1c2022e1090376b451f7206f9b1c0/cache-id
$ sudo cat /var/lib/docker/image/aufs/layerdb/sha256/d1c659b8e3d0e893e95c8eedc755adcb91a1c2022e1090376b451f7206f9b1c0/diff
sha256:b5185949ba02a6e065079660b0536672c9691fb0e0cb1fd912b2c7b29c91d625
$ docker-find sha256:b5185949ba02a6e065079660b0536672c9691fb0e0cb1fd912b2c7b29c91d625
+ docker=/var/lib/docker
+ sudo find /var/lib/docker '(' -path '/var/lib/docker/aufs/diff/*' -o -path '/var/lib/docker/aufs/mnt/*' ')' -prune -o -print
+ grep sha256:b5185949ba02a6e065079660b0536672c9691fb0e0cb1fd912b2c7b29c91d625
+ sudo find /var/lib/docker '(' -path '/var/lib/docker/aufs/diff/*' -o -path '/var/lib/docker/aufs/mnt/*' ')' -prune -o -type f -print0
+ sudo xargs -0 -P20 grep -l sha256:b5185949ba02a6e065079660b0536672c9691fb0e0cb1fd912b2c7b29c91d625
/var/lib/docker/image/aufs/layerdb/sha256/d1c659b8e3d0e893e95c8eedc755adcb91a1c2022e1090376b451f7206f9b1c0/diff