使用ECS AMI运行AWS ec2。我从私有存储库中提取了一个图像。图像被拉出，其大小为19.37GB。存储驱动程序是设备映射器。进行docker系统df -v显示：
docker system df -v
Images space usage:
REPOSITORY TAG IMAGE ID CREATED ago SIZE SHARED SIZE UNIQUE SiZE CONTAINERS
<none> <none> 3b0dc2504ca7 6 days ago ago 19.37GB 0B 19.37GB 0
amazon/amazon-ecs-agent latest 4f476fb2c2ad 2 weeks ago ago 30.01MB 0B 30.01MB 0
amazon/amazon-ecs-pause 0.1.0 4ae0b20b511a 2 weeks ago ago 962.5kB 0B 962.5kB 0
du -sh /var/lib/docker/*
20K /var/lib/docker/builder
72K /var/lib/docker/buildkit
132K /var/lib/docker/containerd
4.0K /var/lib/docker/containers
96K /var/lib/docker/devicemapper
9.2M /var/lib/docker/image
56K /var/lib/docker/network
20K /var/lib/docker/plugins
4.0K /var/lib/docker/runtimes
4.0K /var/lib/docker/swarm
4.0K /var/lib/docker/tmp
4.0K /var/lib/docker/trust
28K /var/lib/docker/volumes
19.37GB存储在哪里？另外，码头工人的文档link说，层存储在/ var / lib / docker / storage-driver / layers /中，但我似乎找不到/ var / lib / docker / devicemapper / layers。另外，这是devicemapper目录的列表。
du -sh /var/lib/docker/devicemapper/*
88K /var/lib/docker/devicemapper/metadata
29M /var/lib/docker/devicemapper/mnt
docker info
Containers: 0
Running: 0
Paused: 0
Stopped: 0
Images: 3
Server Version: 18.06.1-ce
Storage Driver: devicemapper
Pool Name: docker-docker--pool
Pool Blocksize: 524.3kB
Base Device Size: 10.74GB
Backing Filesystem: ext4
Udev Sync Supported: true
Data Space Used: 20.3GB
Data Space Total: 318.3GB
Data Space Available: 298GB
Metadata Space Used: 1.815MB
Metadata Space Total: 323MB
Metadata Space Available: 321.1MB
Thin Pool Minimum Free Space: 31.82GB
Deferred Removal Enabled: true
Deferred Deletion Enabled: true
Deferred Deleted Device Count: 0
Library Version: 1.02.135-RHEL7 (2016-11-16)