【Quickstart Docker】$命令浅析 docker inspect 命令浅析

Love The Way You Lie 2024-02-19 22:12 54阅读 0赞

我们执行 docker inspect a0e056122433 结果如下：

[
        {
        
            "Id": "a0e0561224336806887d89c13cd95f335fe44a0f792a2e6f67a52ef90e05f2e7",
            "Created": "2019-08-19T08:07:10.263355293Z",
            "Path": "/bin/bash",
            "Args": [],
            "State": {
        
                "Status": "running",
                "Running": true,
                "Paused": false,
                "Restarting": false,
                "OOMKilled": false,
                "Dead": false,
                "Pid": 2272,
                "ExitCode": 0,
                "Error": "",
                "StartedAt": "2019-08-19T08:07:10.772055096Z",
                "FinishedAt": "0001-01-01T00:00:00Z"
            },
            "Image": "sha256:05911948d848e0feae84a7b9b74a3eea08f086680935b8b0296c7f6359847c45",
            "ResolvConfPath": "/var/lib/docker/containers/a0e0561224336806887d89c13cd95f335fe44a0f792a2e6f67a52ef90e05f2e7/resolv.conf",
            "HostnamePath": "/var/lib/docker/containers/a0e0561224336806887d89c13cd95f335fe44a0f792a2e6f67a52ef90e05f2e7/hostname",
            "HostsPath": "/var/lib/docker/containers/a0e0561224336806887d89c13cd95f335fe44a0f792a2e6f67a52ef90e05f2e7/hosts",
            "LogPath": "/var/lib/docker/containers/a0e0561224336806887d89c13cd95f335fe44a0f792a2e6f67a52ef90e05f2e7/a0e0561224336806887d89c13cd95f335fe44a0f792a2e6f67a52ef90e05f2e7-json.log",
            "Name": "/friendly_hopper",
            "RestartCount": 0,
            "Driver": "overlay2",
            "Platform": "linux",
            "MountLabel": "",
            "ProcessLabel": "",
            "AppArmorProfile": "",
            "ExecIDs": null,
            "HostConfig": {
        
                "Binds": null,
                "ContainerIDFile": "",
                "LogConfig": {
        
                    "Type": "json-file",
                    "Config": {
        }
                },
                "NetworkMode": "default",
                "PortBindings": {
        },
                "RestartPolicy": {
        
                    "Name": "no",
                    "MaximumRetryCount": 0
                },
                "AutoRemove": false,
                "VolumeDriver": "",
                "VolumesFrom": null,
                "CapAdd": null,
                "CapDrop": null,
                "Capabilities": null,
                "Dns": [],
                "DnsOptions": [],
                "DnsSearch": [],
                "ExtraHosts": null,
                "GroupAdd": null,
                "IpcMode": "private",
                "Cgroup": "",
                "Links": null,
                "OomScoreAdj": 0,
                "PidMode": "",
                "Privileged": false,
                "PublishAllPorts": false,
                "ReadonlyRootfs": false,
                "SecurityOpt": null,
                "UTSMode": "",
                "UsernsMode": "",
                "ShmSize": 67108864,
                "Runtime": "runc",
                "ConsoleSize": [
                    0,
                    0
                ],
                "Isolation": "",
                "CpuShares": 0,
                "Memory": 0,
                "NanoCpus": 0,
                "CgroupParent": "",
                "BlkioWeight": 0,
                "BlkioWeightDevice": [],
                "BlkioDeviceReadBps": null,
                "BlkioDeviceWriteBps": null,
                "BlkioDeviceReadIOps": null,
                "BlkioDeviceWriteIOps": null,
                "CpuPeriod": 0,
                "CpuQuota": 0,
                "CpuRealtimePeriod": 0,
                "CpuRealtimeRuntime": 0,
                "CpusetCpus": "",
                "CpusetMems": "",
                "Devices": [],
                "DeviceCgroupRules": null,
                "DeviceRequests": null,
                "KernelMemory": 0,
                "KernelMemoryTCP": 0,
                "MemoryReservation": 0,
                "MemorySwap": 0,
                "MemorySwappiness": null,
                "OomKillDisable": false,
                "PidsLimit": null,
                "Ulimits": null,
                "CpuCount": 0,
                "CpuPercent": 0,
                "IOMaximumIOps": 0,
                "IOMaximumBandwidth": 0,
                "MaskedPaths": [
                    "/proc/asound",
                    "/proc/acpi",
                    "/proc/kcore",
                    "/proc/keys",
                    "/proc/latency_stats",
                    "/proc/timer_list",
                    "/proc/timer_stats",
                    "/proc/sched_debug",
                    "/proc/scsi",
                    "/sys/firmware"
                ],
                "ReadonlyPaths": [
                    "/proc/bus",
                    "/proc/fs",
                    "/proc/irq",
                    "/proc/sys",
                    "/proc/sysrq-trigger"
                ]
            },
            "GraphDriver": {
        
                "Data": {
        
                    "LowerDir": "/var/lib/docker/overlay2/80dccd8503fd848ee99bebd87fff6a4368eb32e208135d3247b3f51768a8d2af-init/diff:/var/lib/docker/overlay2/5e120e6ff166fde2358b3ff5a8331dc9e9542206c8095bd939439fd14a961104/diff:/var/lib/docker/overlay2/947ee4d8e4e4576c641ca5dc90e5ffe8a607594ab96b7d0e9a2b9dc53f1a0e9c/diff:/var/lib/docker/overlay2/b4374eccdc3068cec408246691bc2c602508894daf6c988e53d6c13d8200a780/diff:/var/lib/docker/overlay2/58e6097db1ded0cca1963929476928521601af98a15bb9afd99312e9150cfc33/diff:/var/lib/docker/overlay2/ce4c93572d73ad4a0d0a552d52cfa2655c0b45a7b03f7d97e25852a980c0a385/diff:/var/lib/docker/overlay2/5d75ff7d791f4f2d2275f9d4e394813a982896cad682754936ce210a9f40af8a/diff:/var/lib/docker/overlay2/215c711c479ef749d926748e903795164ee14db1246dfb026f4275e81a78c20a/diff",
                    "MergedDir": "/var/lib/docker/overlay2/80dccd8503fd848ee99bebd87fff6a4368eb32e208135d3247b3f51768a8d2af/merged",
                    "UpperDir": "/var/lib/docker/overlay2/80dccd8503fd848ee99bebd87fff6a4368eb32e208135d3247b3f51768a8d2af/diff",
                    "WorkDir": "/var/lib/docker/overlay2/80dccd8503fd848ee99bebd87fff6a4368eb32e208135d3247b3f51768a8d2af/work"
                },
                "Name": "overlay2"
            },
            "Mounts": [],
            "Config": {
        
                "Hostname": "a0e056122433",
                "Domainname": "",
                "User": "",
                "AttachStdin": false,
                "AttachStdout": false,
                "AttachStderr": false,
                "Tty": true,
                "OpenStdin": true,
                "StdinOnce": false,
                "Env": [
                    "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/local/jdk1.8.0_212/bin",
                    "JAVA_HOME=/usr/local/jdk1.8.0_212",
                    "CLASSPATH=.:/usr/local/jdk1.8.0_212/lib/dt.jar:/usr/local/jdk1.8.0_212/lib/tools.jar"
                ],
                "Cmd": [
                    "/bin/bash"
                ],
                "Image": "hoas/jdk1.8:19081902",
                "Volumes": null,
                "WorkingDir": "",
                "Entrypoint": null,
                "OnBuild": null,
                "Labels": {
        }
            },
            "NetworkSettings": {
        
                "Bridge": "",
                "SandboxID": "2e3183af0b1e97f5ca6d3af2233d54d53c948844374c387326096913f8940658",
                "HairpinMode": false,
                "LinkLocalIPv6Address": "",
                "LinkLocalIPv6PrefixLen": 0,
                "Ports": {
        },
                "SandboxKey": "/var/run/docker/netns/2e3183af0b1e",
                "SecondaryIPAddresses": null,
                "SecondaryIPv6Addresses": null,
                "EndpointID": "044f93931ea412ae3113bdc67ffdd23be5798b205b73ebf07fe2022dc19650c4",
                "Gateway": "172.17.0.1",
                "GlobalIPv6Address": "",
                "GlobalIPv6PrefixLen": 0,
                "IPAddress": "172.17.0.4",
                "IPPrefixLen": 16,
                "IPv6Gateway": "",
                "MacAddress": "02:42:ac:11:00:04",
                "Networks": {
        
                    "bridge": {
        
                        "IPAMConfig": null,
                        "Links": null,
                        "Aliases": null,
                        "NetworkID": "b656c4401b7085247efffdcfa79578270ebba7d71564a6709bebbe1933fcab34",
                        "EndpointID": "044f93931ea412ae3113bdc67ffdd23be5798b205b73ebf07fe2022dc19650c4",
                        "Gateway": "172.17.0.1",
                        "IPAddress": "172.17.0.4",
                        "IPPrefixLen": 16,
                        "IPv6Gateway": "",
                        "GlobalIPv6Address": "",
                        "GlobalIPv6PrefixLen": 0,
                        "MacAddress": "02:42:ac:11:00:04",
                        "DriverOpts": null
                    }
                }
            }
        }
    ]

我们可以看到返回一个json字符串 ，这是我们可以使用 **docker inspect -f a0e056122433** 对信息摘取，来获取我们需要的东西，比如 pid 容器id 容器名 网关ip等

*  获取PID \{ \{.State.Pid\}\}

[root@iZm5e0jpk0zc4zw3wn2kgbZ ~]# docker inspect -f {
       {.State.Pid}}  a0e056122433
    2272

*  获取网关 \{ \{.NetworkSettings.IPAddress\}\}

[root@iZm5e0jpk0zc4zw3wn2kgbZ ~]# docker inspect --format='{
       {.NetworkSettings.IPAddress}}' a0e056122433
    172.17.0.4
    [root@iZm5e0jpk0zc4zw3wn2kgbZ ~]# docker inspect --format='{
       {.NetworkSettings.IPAddress}}' $(docker ps -a -q)
    172.17.0.4
    172.17.0.3
    172.17.0.2
    [root@iZm5e0jpk0zc4zw3wn2kgbZ ~]#

这里看到的 \{ \{.State.Pid\}\} '\{ \{.NetworkSettings.IPAddress\}\} 都是Docker Inspect 模版里的内容，有时间会去了解。