docker的常用命令（三）

查看日誌：
我們先讓ta跑起來，然後查看ta的這個日誌。

 docker logs -tf --tail 顯示日誌條數 容器的id

[root@dingqisui ~]# docker run -d centos /bin/bash -c "while true;do echo dingqisui;sleep 1;done"
d111a5ca8f885a415165269b27ea567c036977c659c95d2e8f2a3f13b1bfc3ae
[root@dingqisui ~]# docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
d111a5ca8f88        centos              "/bin/bash -c 'while…"   17 seconds ago      Up 16 seconds                           charming_brown
[root@dingqisui ~]# docker logs -tf --tail 10 d111a5ca8f88
2020-05-19T07:33:48.439085623Z dingqisui
2020-05-19T07:33:49.441447852Z dingqisui
2020-05-19T07:33:50.443911347Z dingqisui
2020-05-19T07:33:51.446551654Z dingqisui
2020-05-19T07:33:52.449266541Z dingqisui
2020-05-19T07:33:53.451877826Z dingqisui
2020-05-19T07:33:54.454272126Z dingqisui
2020-05-19T07:33:55.457089547Z dingqisui
2020-05-19T07:33:56.459726222Z dingqisui
2020-05-19T07:33:57.462276577Z dingqisui
2020-05-19T07:33:58.465079018Z dingqisui
2020-05-19T07:33:59.468121691Z dingqisui
2020-05-19T07:34:00.471281444Z dingqisui
2020-05-19T07:34:01.474425111Z dingqisui
2020-05-19T07:34:02.476978126Z dingqisui
2020-05-19T07:34:03.479553175Z dingqisui
2020-05-19T07:34:04.482145539Z dingqisui
2020-05-19T07:34:05.484936561Z dingqisui

-tf 表示顯示日誌
-d表示在後臺運行着
後面寫了一個shell腳本 ，讓ta一直循環着 否則的話，如果docker發現沒有程序再跑，就會自動停下來，就看不了日誌信息了
查看容器內的進程信息

docker top 容器id

[root@dingqisui ~]# docker top d111a5ca8f88
UID                 PID                 PPID                C                   STIME               TTY                 TIME                CMD
root                17657               17639               0                   15:32               ?                   00:00:00            /bin/bash -c while true;do echo dingqisui;sleep 1;done
root                18648               17657               0                   15:40               ?                   00:00:00            /usr/bin/coreutils --coreutils-prog-shebang=sleep /usr/bin/sleep 1

查看鏡像的元數據：

docker inspect id

[root@dingqisui ~]# docker inspect d111a5ca8f88
[
    {
        "Id": "d111a5ca8f885a415165269b27ea567c036977c659c95d2e8f2a3f13b1bfc3ae",
        "Created": "2020-05-19T07:32:05.838206672Z",
        "Path": "/bin/bash",
        "Args": [
            "-c",
            "while true;do echo dingqisui;sleep 1;done"
        ],
        "State": {
            "Status": "running",
            "Running": true,
            "Paused": false,
            "Restarting": false,
            "OOMKilled": false,
            "Dead": false,
            "Pid": 17657,
            "ExitCode": 0,
            "Error": "",
            "StartedAt": "2020-05-19T07:32:06.176572388Z",
            "FinishedAt": "0001-01-01T00:00:00Z"
        },
        "Image": "sha256:470671670cac686c7cf0081e0b37da2e9f4f768ddc5f6a26102ccd1c6954c1ee",
        "ResolvConfPath": "/var/lib/docker/containers/d111a5ca8f885a415165269b27ea567c036977c659c95d2e8f2a3f13b1bfc3ae/resolv.conf",
        "HostnamePath": "/var/lib/docker/containers/d111a5ca8f885a415165269b27ea567c036977c659c95d2e8f2a3f13b1bfc3ae/hostname",
        "HostsPath": "/var/lib/docker/containers/d111a5ca8f885a415165269b27ea567c036977c659c95d2e8f2a3f13b1bfc3ae/hosts",
        "LogPath": "/var/lib/docker/containers/d111a5ca8f885a415165269b27ea567c036977c659c95d2e8f2a3f13b1bfc3ae/d111a5ca8f885a415165269b27ea567c036977c659c95d2e8f2a3f13b1bfc3ae-json.log",
        "Name": "/charming_brown",
        "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/c51bcd6816636d665bd1971861e016ef993dee38f83873ecc14dbfacf4aed0ac-init/diff:/var/lib/docker/overlay2/7a43845ad68626ade2465315c5f6d3dc379539e701f56104fa831ae5be2c8933/diff",
                "MergedDir": "/var/lib/docker/overlay2/c51bcd6816636d665bd1971861e016ef993dee38f83873ecc14dbfacf4aed0ac/merged",
                "UpperDir": "/var/lib/docker/overlay2/c51bcd6816636d665bd1971861e016ef993dee38f83873ecc14dbfacf4aed0ac/diff",
                "WorkDir": "/var/lib/docker/overlay2/c51bcd6816636d665bd1971861e016ef993dee38f83873ecc14dbfacf4aed0ac/work"
            },
            "Name": "overlay2"
        },
        "Mounts": [],
        "Config": {
            "Hostname": "d111a5ca8f88",
            "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",
                "-c",
                "while true;do echo dingqisui;sleep 1;done"
            ],
            "Image": "centos",
            "Volumes": null,
            "WorkingDir": "",
            "Entrypoint": null,
            "OnBuild": null,
            "Labels": {
                "org.label-schema.build-date": "20200114",
                "org.label-schema.license": "GPLv2",
                "org.label-schema.name": "CentOS Base Image",
                "org.label-schema.schema-version": "1.0",
                "org.label-schema.vendor": "CentOS",
                "org.opencontainers.image.created": "2020-01-14 00:00:00-08:00",
                "org.opencontainers.image.licenses": "GPL-2.0-only",
                "org.opencontainers.image.title": "CentOS Base Image",
                "org.opencontainers.image.vendor": "CentOS"
            }
        },
        "NetworkSettings": {
            "Bridge": "",
            "SandboxID": "b55e10bc70e76e093d38988ee6cf1c65338aee7effbd55b1eeb61d1da0ec12e8",
            "HairpinMode": false,
            "LinkLocalIPv6Address": "",
            "LinkLocalIPv6PrefixLen": 0,
            "Ports": {},
            "SandboxKey": "/var/run/docker/netns/b55e10bc70e7",
            "SecondaryIPAddresses": null,
            "SecondaryIPv6Addresses": null,
            "EndpointID": "25a878296d12310c51d3f87e2112d2ccd1837a968048f397cfddb3969a62d8fd",
            "Gateway": "172.18.0.1",
            "GlobalIPv6Address": "",
            "GlobalIPv6PrefixLen": 0,
            "IPAddress": "172.18.0.2",
            "IPPrefixLen": 16,
            "IPv6Gateway": "",
            "MacAddress": "02:42:ac:12:00:02",
            "Networks": {
                "bridge": {
                    "IPAMConfig": null,
                    "Links": null,
                    "Aliases": null,
                    "NetworkID": "2a38b4f559b602825750a71e03d25c700bb9f8a402520efab0887cb89d8c1a4c",
                    "EndpointID": "25a878296d12310c51d3f87e2112d2ccd1837a968048f397cfddb3969a62d8fd",
                    "Gateway": "172.18.0.1",
                    "IPAddress": "172.18.0.2",
                    "IPPrefixLen": 16,
                    "IPv6Gateway": "",
                    "GlobalIPv6Address": "",
                    "GlobalIPv6PrefixLen": 0,
                    "MacAddress": "02:42:ac:12:00:02",
                    "DriverOpts": null
                }
            }
        }
    }
]

這個東西挺重要的，大家可以好好看看

進入容器的命令：
進入容器後開啓一個新的終端

[root@dingqisui ~]# docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
738f579b9c8e        centos              "/bin/bash -c 'while…"   15 seconds ago      Up 14 seconds                           hardcore_khorana
[root@dingqisui ~]# docker exec -it 738f579b9c8e /bin/bash
[root@738f579b9c8e /]# ls
bin  dev  etc  home  lib  lib64  lost+found  media  mnt  opt  proc  root  run  sbin  srv  sys  tmp  usr  var
[root@738f579b9c8e /]# ps -ef
UID        PID  PPID  C STIME TTY          TIME CMD
root         1     0  0 07:50 ?        00:00:00 /bin/bash -c while true;do echo dingqisui;sleep 1;done
root       116     0  0 07:52 pts/0    00:00:00 /bin/bash
root       141     1  0 07:52 ?        00:00:00 /usr/bin/coreutils --coreutils-prog-shebang=sleep /usr/bin/sleep 1
root       142   116  0 07:52 pts/0    00:00:00 ps -ef

進入容器後 進入一個正在執行的終端

[root@dingqisui ~]# docker attach 738f579b9c8e
dingqisui
dingqisui
dingqisui
dingqisui
dingqisui
dingqisui
dingqisui
dingqisui

拷貝命令（從容器到主機）

docker cp id:待拷貝的文件路徑 目標路徑

[root@dingqisui ~]# docker run -it centos /bin/bash
[root@78179fd45bd3 /]# [root@dingqisui ~]# 
[root@dingqisui ~]# docker ps
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
78179fd45bd3        centos              "/bin/bash"         34 seconds ago      Up 33 seconds                           eloquent_meninsky
[root@dingqisui home]# docker attach 78179fd45bd3
[root@78179fd45bd3 /]# ls
bin  dev  etc  home  lib  lib64  lost+found  media  mnt  opt  proc  root  run  sbin  srv  sys  tmp  usr  var
[root@78179fd45bd3 /]# touch test.java
[root@78179fd45bd3 /]# ls
bin  dev  etc  home  lib  lib64  lost+found  media  mnt  opt  proc  root  run  sbin  srv  sys  test.java  tmp  usr  var
[root@78179fd45bd3 /]# exit
exit
[root@dingqisui home]# docker ps -a
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS                      PORTS               NAMES
78179fd45bd3        centos              "/bin/bash"         4 minutes ago       Exited (0) 18 seconds ago                       eloquent_meninsky
[root@dingqisui home]# docker cp 78179fd45bd3:/test.java /home
[root@dingqisui home]# ls
ding123  dingqisui  qisui.java  test.java

複製到主機中了~~