docker回到主机 docker info返回值

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mob6454cc7c268c 2023-10-23 15:43:34

文章标签 docker回到主机运维 java python docker 文章分类 Docker 云计算

1. 依附容器

docker attach

只能依附前台型容器，后台型容器是无法依附终端的，因为它本身就不接受用户交互输入。

2. 查看容器日志

docker logs -f

docker logs --tail=5 deamon_logs ：查看最新5行日志（tail -n 5）

docker logs -f --tail=5

docker logs -f -t deamon_logs : 添加-t标志可以打印产生日志的时刻

docker回到主机 docker info返回值_docker回到主机

3. 查看容器进程

docker top deamon_logs

4. 容器内执行命令（不自己总结了，书上写的很清楚）

在容器启动的时候，通常需要指定其需要执行的程序，然而有时候我们需要在容器运行之后中途启动另一个程序。从Docker 1.3开始，我们可以用docker exec命令在容器中运行新的任务，它可以创建两种任务：后台型任务和交互型任务。后台型任务没有用户交互终端，交互型任务具有和用户交互的输入输出终端。

让我们看一个后台型任务的例子：

$ sudo docker exec -d daemon_dave touch /etc/new_config_file

这里-d标志表示要运行一个后台型任务。接着需要指定要运行命令的容器名和要运行的命令。在这个例子里，touch命令会在daemon_dave容器中创建一个new_config_file的文件。通过docker exec创建的后台任务，我们可以执行维护、监视、管理等复杂而有意义的任务。

使用docker exec命令创建交互型任务时，需要加上-t -i标志，示例如下：

$ sudo docker exec -t -i daemon_dave /bin/bash

-t和-i标志的用法与我们创建交互型容器时一样，会创建一个交互终端，并捕捉进程的标准输入和输出。通过该交互终端，我们可以在容器内运行命令和查看信息等。

5. 查看容器信息

以下是我个人电脑上的例子：

docker inspect
[
    {
        "Id": "870412fbfd3dae8ea4a44b6b00583eb486eb43fded07b6972f9ecc85cc0db710",
        "Created": "2016-03-23T08:51:17.723809515Z",
        "Path": "/bin/bash",
        "Args": [
            "-c",
            "for((i=0;1;i++));do echo $i;sleep 1;done;"
        ],
        "State": {
            "Status": "running",
            "Running": true,
            "Paused": false,
            "Restarting": false,
            "OOMKilled": false,
            "Dead": false,
            "Pid": 26897,
            "ExitCode": 0,
            "Error": "",
            "StartedAt": "2016-03-23T08:51:17.861253283Z",
            "FinishedAt": "0001-01-01T00:00:00Z"
        },
        "Image": "sha256:d0e7f81ca65cdd391b6eb3dd3ce2454a575023156cd932ee4a58f188436bc5e0",
        "ResolvConfPath": "/mnt/sda1/var/lib/docker/containers/870412fbfd3dae8ea4a44b6b00583eb486eb43fded07b6972f9ecc85cc0db710/resolv.conf",
        "HostnamePath": "/mnt/sda1/var/lib/docker/containers/870412fbfd3dae8ea4a44b6b00583eb486eb43fded07b6972f9ecc85cc0db710/hostname",
        "HostsPath": "/mnt/sda1/var/lib/docker/containers/870412fbfd3dae8ea4a44b6b00583eb486eb43fded07b6972f9ecc85cc0db710/hosts",
        "LogPath": "/mnt/sda1/var/lib/docker/containers/870412fbfd3dae8ea4a44b6b00583eb486eb43fded07b6972f9ecc85cc0db710/870412fbfd3dae8ea4a44b6b00583eb486eb43fded07b6972f9ecc85cc0db710-json.log",
        "Name": "/deamon_logs",
        "RestartCount": 0,
        "Driver": "aufs",
        "MountLabel": "",
        "ProcessLabel": "",
        "AppArmorProfile": "",
        "ExecIDs": null,
        "HostConfig": {
            "Binds": null,
            "ContainerIDFile": "",
            "LogConfig": {
                "Type": "json-file",
                "Config": {}
            },
            "NetworkMode": "default",
            "PortBindings": {},
            "RestartPolicy": {
                "Name": "no",
                "MaximumRetryCount": 0
            },
            "VolumeDriver": "",
            "VolumesFrom": null,
            "CapAdd": null,
            "CapDrop": null,
            "Dns": [],
            "DnsOptions": [],
            "DnsSearch": [],
            "ExtraHosts": null,
            "GroupAdd": null,
            "IpcMode": "",
            "Links": null,
            "OomScoreAdj": 0,
            "PidMode": "",
            "Privileged": false,
            "PublishAllPorts": false,
            "ReadonlyRootfs": false,
            "SecurityOpt": null,
            "UTSMode": "",
            "ShmSize": 67108864,
            "ConsoleSize": [
                0,
                0
            ],
            "Isolation": "",
            "CpuShares": 0,
            "CgroupParent": "",
            "BlkioWeight": 0,
            "BlkioWeightDevice": null,
            "BlkioDeviceReadBps": null,
            "BlkioDeviceWriteBps": null,
            "BlkioDeviceReadIOps": null,
            "BlkioDeviceWriteIOps": null,
            "CpuPeriod": 0,
            "CpuQuota": 0,
            "CpusetCpus": "",
            "CpusetMems": "",
            "Devices": [],
            "KernelMemory": 0,
            "Memory": 0,
            "MemoryReservation": 0,
            "MemorySwap": 0,
            "MemorySwappiness": -1,
            "OomKillDisable": false,
            "PidsLimit": 0,
            "Ulimits": null
        },
        "GraphDriver": {
            "Name": "aufs",
            "Data": null
        },
        "Mounts": [],
        "Config": {
            "Hostname": "870412fbfd3d",
            "Domainname": "",
            "User": "",
            "AttachStdin": false,
            "AttachStdout": false,
            "AttachStderr": false,
            "Tty": false,
            "OpenStdin": false,
            "StdinOnce": false,
            "Env": null,
            "Cmd": [
                "/bin/bash",
                "-c",
                "for((i=0;1;i++));do echo $i;sleep 1;done;"
            ],
            "Image": "centos",
            "Volumes": null,
            "WorkingDir": "",
            "Entrypoint": null,
            "OnBuild": null,
            "Labels": {
                "build-date": "2016-03-04",
                "license": "GPLv2",
                "name": "CentOS Base Image",
                "vendor": "CentOS"
            },
            "StopSignal": "SIGTERM"
        },
        "NetworkSettings": {
            "Bridge": "",
            "SandboxID": "3e90239e760219fa9f0d72d112e8ad0bfb060d6c06b53bb0dc8a95db58714a3f",
            "HairpinMode": false,
            "LinkLocalIPv6Address": "",
            "LinkLocalIPv6PrefixLen": 0,
            "Ports": {},
            "SandboxKey": "/var/run/docker/netns/3e90239e7602",
            "SecondaryIPAddresses": null,
            "SecondaryIPv6Addresses": null,
            "EndpointID": "00a8a8bc2a5e3f6e8621df6e0958f1889dbca71c581ba9baf50b69a960ea898b",
            "Gateway": "172.17.0.1",
            "GlobalIPv6Address": "",
            "GlobalIPv6PrefixLen": 0,
            "IPAddress": "172.17.0.2",
            "IPPrefixLen": 16,
            "IPv6Gateway": "",
            "MacAddress": "02:42:ac:11:00:02",
            "Networks": {
                "bridge": {
                    "IPAMConfig": null,
                    "Links": null,
                    "Aliases": null,
                    "NetworkID": "b0aeedb86f56f2669dc6f4949d099c975a858595b626bd7b80f028ea2318015c",
                    "EndpointID": "00a8a8bc2a5e3f6e8621df6e0958f1889dbca71c581ba9baf50b69a960ea898b",
                    "Gateway": "172.17.0.1",
                    "IPAddress": "172.17.0.2",
                    "IPPrefixLen": 16,
                    "IPv6Gateway": "",
                    "GlobalIPv6Address": "",
                    "GlobalIPv6PrefixLen": 0,
                    "MacAddress": "02:42:ac:11:00:02"
                }
            }
        }
    }
]

docker inspect --format='{{ .State.Running }}'

docker回到主机 docker info返回值_运维_02