检查图像

为了检查图像，你可以使用图像 ID 或图像名称，包括存储库和标记。说，你有 CentOS 6 基础图像：

➜  ~ docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
centos              centos6             cf2c3ece5e41        2 weeks ago         194.6 MB

在这种情况下，你可以运行以下任一项：

• ➜ ~ docker inspect cf2c3ece5e41
• ➜ ~ docker inspect centos:centos6

这两个命令都将为你提供 JSON 数组中的所有可用信息：

[
    {
        "Id": "sha256:cf2c3ece5e418fd063bfad5e7e8d083182195152f90aac3a5ca4dbfbf6a1fc2a",
        "RepoTags": [
            "centos:centos6"
        ],
        "RepoDigests": [],
        "Parent": "",
        "Comment": "",
        "Created": "2016-07-01T22:34:39.970264448Z",
        "Container": "b355fe9a01a8f95072e4406763138c5ad9ca0a50dbb0ce07387ba905817d6702",
        "ContainerConfig": {
            "Hostname": "68a1f3cfce80",
            "Domainname": "",
            "User": "",
            "AttachStdin": false,
            "AttachStdout": false,
            "AttachStderr": false,
            "Tty": false,
            "OpenStdin": false,
            "StdinOnce": false,
            "Env": [
                "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
            ],
            "Cmd": [
                "/bin/sh",
                "-c",
                "#(nop) CMD [\"/bin/bash\"]"
            ],
            "Image": "sha256:cdbcc7980b002dc19b4d5b6ac450993c478927f673339b4e6893647fe2158fa7",
            "Volumes": null,
            "WorkingDir": "",
            "Entrypoint": null,
            "OnBuild": null,
            "Labels": {
                "build-date": "20160701",
                "license": "GPLv2",
                "name": "CentOS Base Image",
                "vendor": "CentOS"
            }
        },
        "DockerVersion": "1.10.3",
        "Author": "https://github.com/CentOS/sig-cloud-instance-images",
        "Config": {
            "Hostname": "68a1f3cfce80",
            "Domainname": "",
            "User": "",
            "AttachStdin": false,
            "AttachStdout": false,
            "AttachStderr": false,
            "Tty": false,
            "OpenStdin": false,
            "StdinOnce": false,
            "Env": [
                "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
            ],
            "Cmd": [
                "/bin/bash"
            ],
            "Image": "sha256:cdbcc7980b002dc19b4d5b6ac450993c478927f673339b4e6893647fe2158fa7",
            "Volumes": null,
            "WorkingDir": "",
            "Entrypoint": null,
            "OnBuild": null,
            "Labels": {
                "build-date": "20160701",
                "license": "GPLv2",
                "name": "CentOS Base Image",
                "vendor": "CentOS"
            }
        },
        "Architecture": "amd64",
        "Os": "linux",
        "Size": 194606575,
        "VirtualSize": 194606575,
        "GraphDriver": {
            "Name": "aufs",
            "Data": null
        },
        "RootFS": {
            "Type": "layers",
            "Layers": [
                "sha256:2714f4a6cdee9d4c987fef019608a4f61f1cda7ccf423aeb8d7d89f745c58b18"
            ]
        }
    }
]