docker-container 操作

阅读原文时间：2023年07月15日阅读：3

1、把container放后台运行

[root@localhost dockerfile3]# docker run bigni/python_flask #默认运行image，container里运行的app会放在前台，如果可控制台关闭，则程序也会关闭
* Serving Flask app "app" (lazy loading)
* Environment: production
WARNING: This is a development server. Do not use it in a production deployment.
Use a production WSGI server instead.
* Debug mode: off
* Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)

^[[A^[[A^C[root@localhost dockerfile3]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
[root@localhost dockerfile3]# docker run -d bigni/python_flask #加个d 参数，则会放后台运行
0ff6994da726c86037c5d7cd0eb3ba89c339cdabac5c7df92e112d9c4c417d61
[root@localhost dockerfile3]#
[root@localhost dockerfile3]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
0ff6994da726 bigni/python_flask "python app.py" seconds ago Up seconds /tcp relaxed_banzai
[root@localhost dockerfile3]#

2、如何进入正在运行的container里

[root@localhost dockerfile3]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
0ff6994da726 bigni/python_flask "python app.py" seconds ago Up seconds /tcp relaxed_banzai
[root@localhost dockerfile3]#
[root@localhost dockerfile3]#
[root@localhost dockerfile3]#
[root@localhost dockerfile3]# docker exec -it 0ff6994da726 /bin/bash #使用exec 加上-it要进入交互界面， /bin/bash表示要运行的命令
root@0ff6994da726:/app# ls
app.py
root@0ff6994da726:/app# pwd
/app
root@0ff6994da726:/app# exit #退出
exit
[root@localhost dockerfile3]# docker ps #退出后进程还在后台运行，不影响原来在运行的app
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
0ff6994da726 bigni/python_flask "python app.py" minutes ago Up minutes /tcp relaxed_banzai
[root@localhost dockerfile3]#

3、查看运行中的容器的IP地址

[root@localhost dockerfile3]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
0ff6994da726 bigni/python_flask "python app.py" minutes ago Up minutes /tcp relaxed_banzai
[root@localhost dockerfile3]# docker exec -it 0ff6994da726 ip
Usage: ip [ OPTIONS ] OBJECT { COMMAND | help }
ip [ -force ] -batch filename
where OBJECT := { link | address | addrlabel | route | rule | neigh | ntable |
tunnel | tuntap | maddress | mroute | mrule | monitor | xfrm |
netns | l2tp | fou | macsec | tcp_metrics | token | netconf | ila }
OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] | -r[esolve] |
-h[uman-readable] | -iec |
-f[amily] { inet | inet6 | ipx | dnet | mpls | bridge | link } |
- | - | -I | -D | -B | - |
-l[oops] { maximum-addr-flush-attempts } | -br[ief] |
-o[neline] | -t[imestamp] | -ts[hort] | -b[atch] [filename] |
-rc[vbuf] [size] | -n[etns] name | -a[ll] | -c[olor]}
[root@localhost dockerfile3]# docker exec -it 0ff6994da726 ip address #查看ip地址
: lo: mtu qdisc noqueue state UNKNOWN group default qlen
link/loopback ::::: brd :::::
inet 127.0.0.1/ scope host lo
valid_lft forever preferred_lft forever
: eth0@if69: mtu qdisc noqueue state UP group default
link/ether ::ac::: brd ff:ff:ff:ff:ff:ff link-netnsid
inet 172.17.0.2/ brd 172.17.255.255 scope global eth0
valid_lft forever preferred_lft forever
[root@localhost dockerfile3]#

4、停止运行的container 可以使用

[root@localhost dockerfile3]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
0ff6994da726 bigni/python_flask "python app.py" minutes ago Up minutes /tcp relaxed_banzai
[root@localhost dockerfile3]# docker stop 0f #id可以缩写，或者使用 docker container stop containerID
0f
[root@localhost dockerfile3]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
[root@localhost dockerfile3]#

5、指定container name

PS：name也可以和ID一样，具有唯一性

[root@localhost dockerfile3]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
[root@localhost dockerfile3]# docker run -d bigni/python_flask --name=python_flask
a0f19d7ec136c6359cee143d00f4f2619d09381279576c377f4d5fca33c88aed
docker: Error response from daemon: OCI runtime create failed: container_linux.go:: starting container process caused "exec: \"--name=python_flask\": executable file not found in $PATH": unknown.
[root@localhost dockerfile3]# docker run -d --name=python_flask bigni/python_flask
e9352a7f74a34ef5fd4470e44330496ef215b626db30712fdc62b5e1ec5361e2
[root@localhost dockerfile3]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
e9352a7f74a3 bigni/python_flask "python app.py" seconds ago Up seconds /tcp python_flask
[root@localhost dockerfile3]#

6、查看docker object low-level information

[root@localhost dockerfile3]# docker inspect e9352a7f74a3
[
{
"Id": "e9352a7f74a34ef5fd4470e44330496ef215b626db30712fdc62b5e1ec5361e2",
"Created": "2019-07-09T13:54:12.711239412Z",
"Path": "python",
"Args": [
"app.py"
],
"State": {
"Status": "running",
"Running": true,
"Paused": false,
"Restarting": false,
"OOMKilled": false,
"Dead": false,
"Pid": ,
"ExitCode": ,
"Error": "",
"StartedAt": "2019-07-09T13:54:12.984885505Z",
"FinishedAt": "0001-01-01T00:00:00Z"
},
"Image": "sha256:9ca7a3d1c78e0e6c5e5871a0fb3d8640cf1a3f340da6a700c265a15c727d36f1",
"ResolvConfPath": "/var/lib/docker/containers/e9352a7f74a34ef5fd4470e44330496ef215b626db30712fdc62b5e1ec5361e2/resolv.conf",
"HostnamePath": "/var/lib/docker/containers/e9352a7f74a34ef5fd4470e44330496ef215b626db30712fdc62b5e1ec5361e2/hostname",
"HostsPath": "/var/lib/docker/containers/e9352a7f74a34ef5fd4470e44330496ef215b626db30712fdc62b5e1ec5361e2/hosts",
"LogPath": "/var/lib/docker/containers/e9352a7f74a34ef5fd4470e44330496ef215b626db30712fdc62b5e1ec5361e2/e9352a7f74a34ef5fd4470e44330496ef215b626db30712fdc62b5e1ec5361e2-json.log",
"Name": "/python_flask",
"RestartCount": ,
"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":
},
"AutoRemove": false,
"VolumeDriver": "",
"VolumesFrom": null,
"CapAdd": null,
"CapDrop": null,
"Dns": [],
"DnsOptions": [],
"DnsSearch": [],
"ExtraHosts": null,
"GroupAdd": null,
"IpcMode": "shareable",
"Cgroup": "",
"Links": null,
"OomScoreAdj": ,
"PidMode": "",
"Privileged": false,
"PublishAllPorts": false,
"ReadonlyRootfs": false,
"SecurityOpt": null,
"UTSMode": "",
"UsernsMode": "",
"ShmSize": ,
"Runtime": "runc",
"ConsoleSize": [
,

        \],  
        "Isolation": "",  
        "CpuShares": ,  
        "Memory": ,  
        "NanoCpus": ,  
        "CgroupParent": "",  
        "BlkioWeight": ,  
        "BlkioWeightDevice": \[\],  
        "BlkioDeviceReadBps": null,  
        "BlkioDeviceWriteBps": null,  
        "BlkioDeviceReadIOps": null,  
        "BlkioDeviceWriteIOps": null,  
        "CpuPeriod": ,  
        "CpuQuota": ,  
        "CpuRealtimePeriod": ,  
        "CpuRealtimeRuntime": ,  
        "CpusetCpus": "",  
        "CpusetMems": "",  
        "Devices": \[\],  
        "DeviceCgroupRules": null,  
        "DiskQuota": ,  
        "KernelMemory": ,  
        "MemoryReservation": ,  
        "MemorySwap": ,  
        "MemorySwappiness": null,  
        "OomKillDisable": false,  
        "PidsLimit": ,  
        "Ulimits": null,  
        "CpuCount": ,  
        "CpuPercent": ,  
        "IOMaximumIOps": ,  
        "IOMaximumBandwidth": ,  
        "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/b0fd3dcb14f098298cffdabbd846c50913def554fbedcc9964f6d8340133f444-init/diff:/var/lib/docker/overlay2/03a9b82b2c9e96491837c0a33dd45886adbfa7e2341ba32f3406347920fdb555/diff:/var/lib/docker/overlay2/da3992aa0942e84aaf65255e86b76aa2f33a67d0bd365e703342702678665744/diff:/var/lib/docker/overlay2/97fe6e5072531114ad2c5776bcfc3b8bfb99142415cee98d0b7f99e4f85a3406/diff:/var/lib/docker/overlay2/766fd8fb4b7ab5e6262fc6eaddb1bf6217d36f39c1df003efcc912a2a1ced538/diff:/var/lib/docker/overlay2/4a1b0db496f066aa43883d8ca0a59595a9cdfdb84cc725288aaa21d8c43f3e4e/diff:/var/lib/docker/overlay2/3a95f72acbfdebb697651bbf6faed202b1ddec3ed0f5c2c1a473504ffb92e5a1/diff:/var/lib/docker/overlay2/8c21df782bdedb66d0a1d465911e7d0f1607ca91df6625d1a3226cfbce86b799/diff:/var/lib/docker/overlay2/4c84db527317ca84f629017feb44a390dea6e7447eb1b20fafd02158c782daa2/diff:/var/lib/docker/overlay2/b09af7df97608383eae6fcaa95fc598493fa2ec7d32bf22ad36e63ac6eb2d79a/diff:/var/lib/docker/overlay2/587c552e7b5dc0a9092cf8789ab84c12b2d1fca39bc2a224ecd10c11cd802105/diff:/var/lib/docker/overlay2/c9ab7356f6f29bd2fbfc084c4a7141d634b5092b9242979dbacf8907aaf97aa7/diff",  
            "MergedDir": "/var/lib/docker/overlay2/b0fd3dcb14f098298cffdabbd846c50913def554fbedcc9964f6d8340133f444/merged",  
            "UpperDir": "/var/lib/docker/overlay2/b0fd3dcb14f098298cffdabbd846c50913def554fbedcc9964f6d8340133f444/diff",  
            "WorkDir": "/var/lib/docker/overlay2/b0fd3dcb14f098298cffdabbd846c50913def554fbedcc9964f6d8340133f444/work"  
        },  
        "Name": "overlay2"  
    },  
    "Mounts": \[\],  
    "Config": {  
        "Hostname": "e9352a7f74a3",  
        "Domainname": "",  
        "User": "",  
        "AttachStdin": false,  
        "AttachStdout": false,  
        "AttachStderr": false,  
        "ExposedPorts": {  
            "5000/tcp": {}  
        },  
        "Tty": false,  
        "OpenStdin": false,  
        "StdinOnce": false,  
        "Env": \[  
            "PATH=/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",  
            "LANG=C.UTF-8",  
            "PYTHONIOENCODING=UTF-8",  
            "GPG\_KEY=C01E1CAD5EA2C4F0B8E3571504C367C218ADD4FF",  
            "PYTHON\_VERSION=2.7.16",  
            "PYTHON\_PIP\_VERSION=19.1.1"  
        \],  
        "Cmd": \[  
            "python",  
            "app.py"  
        \],  
        "ArgsEscaped": true,  
        "Image": "bigni/python\_flask",  
        "Volumes": null,  
        "WorkingDir": "/app",  
        "Entrypoint": null,  
        "OnBuild": null,  
        "Labels": {  
            "author": "BIGNI"  
        }  
    },  
    "NetworkSettings": {  
        "Bridge": "",  
        "SandboxID": "fa59981a59c7d43a82cff0c4c7549d51223848c845fd4c9792eab3310f1d2cdc",  
        "HairpinMode": false,  
        "LinkLocalIPv6Address": "",  
        "LinkLocalIPv6PrefixLen": ,  
        "Ports": {  
            "5000/tcp": null  
        },  
        "SandboxKey": "/var/run/docker/netns/fa59981a59c7",  
        "SecondaryIPAddresses": null,  
        "SecondaryIPv6Addresses": null,  
        "EndpointID": "0b0627742a3459b1f156862b9ba5ee779bb0158457e89cd284c5b68916a6a62f",  
        "Gateway": "172.17.0.1",  
        "GlobalIPv6Address": "",  
        "GlobalIPv6PrefixLen": ,  
        "IPAddress": "172.17.0.2",  
        "IPPrefixLen": ,  
        "IPv6Gateway": "",  
        "MacAddress": "02:42:ac:11:00:02",  
        "Networks": {  
            "bridge": {  
                "IPAMConfig": null,  
                "Links": null,  
                "Aliases": null,  
                "NetworkID": "d74eae6754f77ff10150ff7d99c411bc54bb3e35c2feb05eff54f68206a5a22c",  
                "EndpointID": "0b0627742a3459b1f156862b9ba5ee779bb0158457e89cd284c5b68916a6a62f",  
                "Gateway": "172.17.0.1",  
                "IPAddress": "172.17.0.2",  
                "IPPrefixLen": ,  
                "IPv6Gateway": "",  
                "GlobalIPv6Address": "",  
                "GlobalIPv6PrefixLen": ,  
                "MacAddress": "02:42:ac:11:00:02",  
                "DriverOpts": null  
            }  
        }  
    }  
}

]
[root@localhost dockerfile3]#

docker inspect containerID

7、使用stress命令对image 内核进行测试

1、进入image交互界面

docker run -it ubuntu

2、安装stress

root@78a8b33fc484:/# apt-get update && apt-get install -y stress

3、stress --help查看参数

root@78a8b33fc484:/# stress --help
`stress' imposes certain types of compute stress on your system

Usage: stress [OPTION [ARG]] …
-?, --help show this help statement
--version show version statement
-v, --verbose be verbose #debug调试
-q, --quiet be quiet
-n, --dry-run show what would have been done
-t, --timeout N timeout after N seconds
--backoff N wait factor of N microseconds before work starts
-c, --cpu N spawn N workers spinning on sqrt()
-i, --io N spawn N workers spinning on sync()
-m, --vm N spawn N workers spinning on malloc()/free() #启动多少个进程
--vm-bytes B malloc B bytes per vm worker (default is 256MB) #进程占用内存大小，默认是256MB
--vm-stride B touch a byte every B bytes (default is )
--vm-hang N sleep N secs before free (default is none, is inf)
--vm-keep redirty memory instead of freeing and reallocating
-d, --hdd N spawn N workers spinning on write()/unlink()
--hdd-bytes B write B bytes per hdd worker (default is 1GB)
--hdd-noclean do not unlink files created by hdd workers