docker-container 操作
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: <LOOPBACK,UP,LOWER_UP> 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: <BROADCAST,MULTICAST,UP,LOWER_UP> 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 Example: stress --cpu --io --vm --vm-bytes 128M --timeout 10s Note: Numbers may be suffixed with s,m,h,d,y (time) or B,K,M,G (size).
root@78a8b33fc484:/# stress --vm
stress: info: [] dispatching hogs: cpu, io, vm, hdd
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