我一直在使用注册通过执行以下操作来标记我要从注册表中删除的 blob：
docker run --rm reg/delete -u username -p password --registry myregistry.com rm image
我没有得到任何输出，所以我认为我标记了图像以将其删除。
然后我在服务器中将命令运行到 docker 注册表容器以运行垃圾收集器，如下所示：
sudo docker exec -it registry bin/registry garbage-collect --dry-run /config/config.yml
我得到了很多输出，例如：
DEBU[0007] filesystem.Stat("/docker/registry/v2/blobs/sha256/17/17954313e0f8926875ce0743fe85693e0e9f695908c8f1544360d067a66b5eee/data") environment=development go.version=go1.7.3 instance.id=3296f17d-2ba7-4b3f-8530-991cb2ff8e04 service=registry trace.duration=15.631837ms trace.file=/go/src/github.com/docker/distribution/registry/storage/driver/base/base.go trace.func=github.com/docker/distribution/registry/storage/driver/base.(*Base).Stat trace.id=6977da41-fd94-4926-99af-059821e18046 trace.line=137
account-portal: marking manifest sha256:17954313e0f8926875ce0743fe85693e0e9f695908c8f1544360d067a66b5eee
DEBU[0007] (*manifestStore).Get environment=development go.version=go1.7.3 instance.id=3296f17d-2ba7-4b3f-8530-991cb2ff8e04 service=registry
DEBU[0007] filesystem.GetContent("/docker/registry/v2/repositories/account-portal/_manifests/revisions/sha256/17954313e0f8926875ce0743fe85693e0e9f695908c8f1544360d067a66b5eee/link") environment=development go.version=go1.7.3 instance.id=3296f17d-2ba7-4b3f-8530-991cb2ff8e04 service=registry trace.duration=86.1µs trace.file=/go/src/github.com/docker/distribution/registry/storage/driver/base/base.go trace.func=github.com/docker/distribution/registry/storage/driver/base.(*Base).GetContent trace.id=ebd03857-56b6-4957-b791-9c48fdb152e9 trace.line=82
DEBU[0007] filesystem.Stat("/docker/registry/v2/blobs/sha256/17/17954313e0f8926875ce0743fe85693e0e9f695908c8f1544360d067a66b5eee/data") environment=development go.version=go1.7.3 instance.id=3296f17d-2ba7-4b3f-8530-991cb2ff8e04 service=registry trace.duration=74.19µs trace.file=/go/src/github.com/docker/distribution/registry/storage/driver/base/base.go trace.func=github.com/docker/distribution/registry/storage/driver/base.(*Base).Stat trace.id=96520ca1-6ba1-470c-869e-cf0a49846390 trace.line=137
DEBU[0007] filesystem.GetContent("/docker/registry/v2/blobs/sha256/17/17954313e0f8926875ce0743fe85693e0e9f695908c8f1544360d067a66b5eee/data") environment=development go.version=go1.7.3 instance.id=3296f17d-2ba7-4b3f-8530-991cb2ff8e04 service=registry trace.duration=20.820776ms trace.file=/go/src/github.com/docker/distribution/registry/storage/driver/base/base.go trace.func=github.com/docker/distribution/registry/storage/driver/base.(*Base).GetContent trace.id=6752e130-1b77-49c2-adda-3b9195aac1df trace.line=82
DEBU[0007] (*schema2ManifestHandler).Unmarshal environment=development go.version=go1.7.3 instance.id=3296f17d-2ba7-4b3f-8530-991cb2ff8e04 service=registry
account-portal: marking blob sha256:90769d06ffb7dd1f8d1bc4f7b18e52fb94b651191640b680f028806622b99236
account-portal: marking blob sha256:3b8d91fe75724cafe136236e31d5212cb322d68aa3bfc4bfda97a0a53a55e234
account-portal: marking blob sha256:a3ed95caeb02ffe68cdd9fd84406680ae93d633cb16422d00e8a7c22955b46d4
account-portal: marking blob sha256:dfc6505cfad4d185913ccd772541a0d32e64d4e04d9c249728dd7e194c77340f
account-portal: marking blob sha256:47b142d56ce3cc7766143d5fcd836541dac5006fa66076d4261e9e3d4a24a0cd
account-portal: marking blob sha256:6397456b1db08c3b5fb104497d15eb849a317c35ffeb18b608e6013593b82300
account-portal: marking blob sha256:f1074061d22a0681d732d72a8d11abf0a2f77ee3652ee827c62d696c19697a93
account-portal: marking blob sha256:a3ed95caeb02ffe68cdd9fd84406680ae93d633cb16422d00e8a7c22955b46d4
account-portal: marking blob sha256:a3ed95caeb02ffe68cdd9fd84406680ae93d633cb16422d00e8a7c22955b46d4
account-portal: marking blob sha256:7b60f5a7551c3bb15dcd5ecd46a2ec18118cc652f6bdbff23bf16c895a8a1586
account-portal: marking blob sha256:a3ed95caeb02ffe68cdd9fd84406680ae93d633cb16422d00e8a7c22955b46d4
account-portal: marking blob sha256:a3ed95caeb02ffe68cdd9fd84406680ae93d633cb16422d00e8a7c22955b46d4
account-portal: marking blob sha256:a3ed95caeb02ffe68cdd9fd84406680ae93d633cb16422d00e8a7c22955b46d4
account-portal: marking blob sha256:a3ed95caeb02ffe68cdd9fd84406680ae93d633cb16422d00e8a7c22955b46d4
account-portal: marking blob sha256:a3ed95caeb02ffe68cdd9fd84406680ae93d633cb16422d00e8a7c22955b46d4
account-portal: marking blob sha256:a3ed95caeb02ffe68cdd9fd84406680ae93d633cb16422d00e8a7c22955b46d4
account-portal: marking blob sha256:a3ed95caeb02ffe68cdd9fd84406680ae93d633cb16422d00e8a7c22955b46d4
account-portal: marking blob sha256:3b36e36d988def39cf035c9a82076bbff95861bd9092701516d937f7dff24a73
account-portal: marking blob sha256:a3ed95caeb02ffe68cdd9fd84406680ae93d633cb16422d00e8a7c22955b46d4
account-portal: marking blob sha256:283fbeeb0d74113ed38891d145bcbff04a96178d2f1e19bb9dc5564ebd1959ab
account-portal: marking blob sha256:a3ed95caeb02ffe68cdd9fd84406680ae93d633cb16422d00e8a7c22955b46d4
account-portal: marking blob sha256:a3ed95caeb02ffe68cdd9fd84406680ae93d633cb16422d00e8a7c22955b46d4
account-portal: marking blob sha256:68ad5d9d0e66645895611177d50dfc46bf1bbf9cd1275e43da416af0d2b2c30a
account-portal: marking blob sha256:6fae118190fe88ba8487a3a2cfac7b1f2d922d313963cd81329fd37b2516ca3d
account-portal: marking blob sha256:9e14db6259dc2696e6fe816ddb106ec1810a4f39075695c66cbeccd58f54aad1
最后我得到这样的回顾：
12530 blobs marked, 0 blobs eligible for deletion
因此，根据输出，没有图像从我的注册表中删除。我通过运行确认df -h，是的，我仍然使用相同数量的磁盘空间。
所以，我不知道我做错了什么。我已遵循 docker 文档中有关以下内容的所有说明垃圾收集器我不知道该怎么做才能收回空间。