docker info shows incorrect info about Total data space #27409
Description
Description
Docker info shows incorrect info about Total data space.
Data Space Total != (Data Space Used + Data Space Available)
The instance on which docker is running don't have that much about of space shown in 'Data Space Total' of 'docker info'.
Steps to reproduce the issue:
- docker info
- Check whether Data Space Total == (Data Space Used + Data Space Available)
Describe the results you received:
docker info
Containers: 0
Running: 0
Paused: 0
Stopped: 0
Images: 97
Server Version: 1.12.1
Storage Driver: devicemapper
Pool Name: docker-253:1-650320-pool
Pool Blocksize: 65.54 kB
Base Device Size: 10.74 GB
Backing Filesystem: xfs
Data file: /dev/loop0
Metadata file: /dev/loop1
Data Space Used: 5.223 GB
Data Space Total: 107.4 GB
Data Space Available: 44.74 GB
Metadata Space Used: 6.988 MB
Metadata Space Total: 2.147 GB
Metadata Space Available: 2.14 GB
Thin Pool Minimum Free Space: 10.74 GB
Udev Sync Supported: true
Deferred Removal Enabled: false
Deferred Deletion Enabled: false
Deferred Deleted Device Count: 0
Data loop file: /var/lib/docker/devicemapper/devicemapper/data
WARNING: Usage of loopback devices is strongly discouraged for production use. Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.
Metadata loop file: /var/lib/docker/devicemapper/devicemapper/metadata
Library Version: 1.02.107-RHEL7 (2016-06-09)
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
Volume: local
Network: null overlay host bridge
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Security Options: seccomp
Kernel Version: 3.10.0-327.13.1.el7.x86_64
Operating System: CentOS Linux 7 (Core)
OSType: linux
Architecture: x86_64
CPUs: 1
Total Memory: 1.954 GiB
Name: dockerhost.cisco.com
ID: BLND:CG2Q:6TZJ:KBUU:LPON:F6CG:LZBO:OVKT:P67J:YHQO:XD7M:HE77
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
Insecure Registries:
127.0.0.0/8
Space shown in 'Data Space Total' (107.4 GB) is not even available on my instance which is Micro-small flavor (50GB disk space).
Describe the results you expected:
docker info should show Data Space Total == (Data Space Used + Data Space Available)
Space shown in 'Data Space Total' should actual exists in reality. For my setup it could be around 50GB (<=50GB) since my instance is Micro-small in flavor with 50GB disk space.
Output of docker version:
Client:
Version: 1.12.1
API version: 1.24
Go version: go1.6.3
Git commit: 23cf638
Built:
OS/Arch: linux/amd64
Server:
Version: 1.12.1
API version: 1.24
Go version: go1.6.3
Git commit: 23cf638
Built:
OS/Arch: linux/amd64