Docker系列（8）- 常用其他命令(1) | 日志、元数据、进程的查看

后台启动容器

# 命令 docker run -d 镜像名

[root@localhost ~]# docker run -d centos

#问题：docker ps，发现centos停止了

#常见的坑：docker容器使用后台运行，就必须要有一个前台进程，docker发现没有应用，就会自动停止

#nginx，容器启动后，发现自己没有提供服务，就会立刻停止，就是没有程序了

查看日志命令

命令：docker logs -f -t --tail 显示多少条 容器ID

#自己编写一段shell脚本，输出日志

[root@localhost ~]# docker run -d centos /bin/bash -c "while true;do echo gelaotou;sleep 2;done"

#查看当前容器是否正在运行

[root@localhost ~]# docker ps

CONTAINER ID   IMAGE     COMMAND                  CREATED         STATUS         PORTS     NAMES

6a6584c42e03   centos    "/bin/bash -c 'while…"   4 seconds ago   Up 4 seconds             inspiring_sanderson

#显示日志
-tf　　　　　　　　　　　　#显示日志
　　--tail number　　　　#要显示的日志条数
[root@localhost ~]# docker logs -f -t --tail 10 6a6584c42e03

查看容器中进程信息

#命令：docker top 容器ID
[root@localhost ~]# docker top 6a6584c42e03

UID                 PID                 PPID                C                   STIME               TTY                 TIME                CMD

root                51000               50979               0                   18:58               ?                   00:00:00            /bin/bash -c while true;do echo gelaotou;sleep 2;done

root                51415               51000               0                   19:07               ?                   00:00:00            /usr/bin/coreutils --coreutils-prog-shebang=sleep /usr/bin/sleep 2

查看容器元数据

#命令：docker inspect 容器ID

#测试
[root@localhost ~]# docker inspect 6a6584c42e03

[

    {

        "Id": "6a6584c42e03848a0758154af092f29f9a5fc8aecc0c1141e992777fd6c78ab4",

        "Created": "2021-08-25T10:58:55.237518044Z",

        "Path": "/bin/bash",

        "Args": [

            "-c",

            "while true;do echo gelaotou;sleep 2;done"

        ],

        "State": {

            "Status": "running",

            "Running": true,

            "Paused": false,

            "Restarting": false,

            "OOMKilled": false,

            "Dead": false,

            "Pid": 51000,

            "ExitCode": 0,

            "Error": "",

            "StartedAt": "2021-08-25T10:58:55.562799979Z",

            "FinishedAt": "0001-01-01T00:00:00Z"

        },

        "Image": "sha256:300e315adb2f96afe5f0b2780b87f28ae95231fe3bdd1e16b9ba606307728f55",

        "ResolvConfPath": "/var/lib/docker/containers/6a6584c42e03848a0758154af092f29f9a5fc8aecc0c1141e992777fd6c78ab4/resolv.conf",

        "HostnamePath": "/var/lib/docker/containers/6a6584c42e03848a0758154af092f29f9a5fc8aecc0c1141e992777fd6c78ab4/hostname",

        "HostsPath": "/var/lib/docker/containers/6a6584c42e03848a0758154af092f29f9a5fc8aecc0c1141e992777fd6c78ab4/hosts",

        "LogPath": "/var/lib/docker/containers/6a6584c42e03848a0758154af092f29f9a5fc8aecc0c1141e992777fd6c78ab4/6a6584c42e03848a0758154af092f29f9a5fc8aecc0c1141e992777fd6c78ab4-json.log",

        "Name": "/inspiring_sanderson",

        "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,

            "CgroupnsMode": "host",

            "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/ddb28e0803ddb17fddd599156bf2972e622e2b9cf54113749615486fe80591a1-init/diff:/var/lib/docker/overlay2/faab2e64b4dd218161992d5efe5b6e8e44ccf5521803fc5649fb77db73288f1f/diff",

                "MergedDir": "/var/lib/docker/overlay2/ddb28e0803ddb17fddd599156bf2972e622e2b9cf54113749615486fe80591a1/merged",

                "UpperDir": "/var/lib/docker/overlay2/ddb28e0803ddb17fddd599156bf2972e622e2b9cf54113749615486fe80591a1/diff",

                "WorkDir": "/var/lib/docker/overlay2/ddb28e0803ddb17fddd599156bf2972e622e2b9cf54113749615486fe80591a1/work"

            },

            "Name": "overlay2"

        },

        "Mounts": [],

        "Config": {

            "Hostname": "6a6584c42e03",

            "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 gelaotou;sleep 2;done"

            ],

            "Image": "centos",

            "Volumes": null,

            "WorkingDir": "",

            "Entrypoint": null,

            "OnBuild": null,

            "Labels": {

                "org.label-schema.build-date": "20201204",

                "org.label-schema.license": "GPLv2",

                "org.label-schema.name": "CentOS Base Image",

                "org.label-schema.schema-version": "1.0",

                "org.label-schema.vendor": "CentOS"

            }

        },

        "NetworkSettings": {

            "Bridge": "",

            "SandboxID": "10d59ad59c9be98cc6e612f1bf3e830b0eabf447326c4d2ba51509dac5e22ff5",

            "HairpinMode": false,

            "LinkLocalIPv6Address": "",

            "LinkLocalIPv6PrefixLen": 0,

            "Ports": {},

            "SandboxKey": "/var/run/docker/netns/10d59ad59c9b",

            "SecondaryIPAddresses": null,

            "SecondaryIPv6Addresses": null,

            "EndpointID": "ebe304791568263b91f5c86170880878c2b9d683e5643e8e25604b160d02fd30",

            "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": "11632f3244eab18afa1c1339d4298e0c535ed6bff5fc6522f50b11f5f286ee30",

                    "EndpointID": "ebe304791568263b91f5c86170880878c2b9d683e5643e8e25604b160d02fd30",

                    "Gateway": "172.17.0.1",

                    "IPAddress": "172.17.0.2",

                    "IPPrefixLen": 16,

                    "IPv6Gateway": "",

                    "GlobalIPv6Address": "",

                    "GlobalIPv6PrefixLen": 0,

                    "MacAddress": "02:42:ac:11:00:02",

                    "DriverOpts": null

                }

            }

        }

    }

]

巴特西

Docker系列（8）- 常用其他命令(1) | 日志、元数据、进程的查看

后台启动容器

查看日志命令

查看容器中进程信息

查看容器元数据

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