docker基本命令
漆雕和雅
--docker注册账号DockerID
https://cloud.docker.com/
Docker ID：abc
邮箱:xx
密码:123
--login登录账号
root@node1:~# docker login
Username: abc
Password: 123
Login Succeeded
root@node1:~#
--tag标签
root@node1:~/testdocker# docker tag hello-world gdmzlhj1/repository:hello-tag
root@node1:~/testdocker# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
friendlyhello latest 6b1ec6201bc0 24 minutes ago 195 MB
python 2.7-slim 1c7128a655f6 2 weeks ago 183 MB
gdmzlhj1/repository hello-tag 48b5124b2768 4 months ago 1.84 kB
hello-world latest 48b5124b2768 4 months ago 1.84 kB
--push上传
root@node1:~/testdocker# docker push gdmzlhj1/repository:hello-tag
The push refers to a repository [docker.io/gdmzlhj1/repository]
98c944e98de8: Mounted from library/hello-world
hello-tag: digest: sha256:c5515758d4c5e1e838e9cd307f6c6a0d620b5e07e6f927b07d05f6d12a1ac8d7 size: 524
--search搜索
root@node1:~# docker search hello-world
NAME DESCRIPTION STARS OFFICIAL AUTOMATED
hello-world Hello World! (an example of minimal Docker... 308 [OK]
tutum/hello-world Image to test docker deployments. Has Apac... 35 [OK]
dockercloud/hello-world Hello World! 12 [OK]
marcells/aspnet-hello-world ASP.NET vNext - Hello World 4 [OK]
neoxsys/hello-world hello-world container based on Ubuntu 16.0... 1 [OK]
waleedsamy/hello-world-expressjs-docker Hello world express sample, return `Hello ... 1 [OK]
carinamarina/hello-world-app This is a sample Python web application, r... 1 [OK]
scottnakada/angular2-docker-hello-world Angular 2 Hello World Sample Application u... 1 [OK]
gscrivano/hello-world hello world example system container 0 [OK]
utanna/hello-world Nginx hello-world 0 [OK]
psitrax/hello-world Simple Hello World Container: Outputs Head... 0 [OK]
crccheck/hello-world Hello World web server in under 2.5 MB 0 [OK]
jerzhang/hello-world Hello world automated build 0 [OK]
navycloud/hello-world Navy hello world 0 [OK]
helloworld314/hello-world-docker Hello world docker 0 [OK]
mgueury/docker-hello-world Simple Hello World Example 0 [OK]
dharmit/hello-world hello world 0 [OK]
wowgroup/hello-world Minimal web app for testing purposes 0 [OK]
infrastructureascode/hello-world A tiny "Hello World" web server with a hea... 0 [OK]
jmreeve007/hello-world Create automated build for changes to hell... 0 [OK]
hoto/hello-world Nodejs hello world application. 0 [OK]
akshaykawathalkar/hello-world 13 feb hello world 0 [OK]
wodge/docker-hello-world Hello World test for auto update to Docker... 0 [OK]
andreamocci/docker-hello-world Docker hello world. 0 [OK]
n8io/hello-world A simple hello world node.js app to test d... 0 [OK]
--pull下载
docker有一个公共的img仓库，执行docker pull默认会在这个公共库里去下载对应的img，类似maven一样，maven的respository里有很多jar包。
root@node1:~# docker pull hello-world
Using default tag: latest
latest: Pulling from library/hello-world
Digest: sha256:c5515758d4c5e1e838e9cd307f6c6a0d620b5e07e6f927b07d05f6d12a1ac8d7
Status: Image is up to date for hello-world:latest
root@node1:~#
root@node1:~#
root@node1:~# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
hello-world latest 48b5124b2768 4 months ago 1.84 kB
--运行app
root@node1:~$ docker run hello-world
$ docker run --name helloworld -d -p 8080:80 daocloud.io/nginx
$ docker run --name helloworld2 -d -p 9090:80 daocloud.io/nginx
—name 是给容器起了一个名字；
-d 表示容器运行在后台，如果前台，用-i表示交互式；
-p 8080:80 表示端口映射，将宿主机的8080端口转发到容器内的80端口；
daocloud.io/nginx 表示刚才下载的镜像（Image）
$ curl http://localhost:8080 会显示 “Welcome to nginx!” 的页面。
$ curl http://localhost:9090 结果一样，只是访问了另外一个容器罢了。
--inspect返回信息
root@node1:~# docker inspect hello-world
[
{
"Id": "sha256:48b5124b2768d2b917edcb640435044a97967015485e812545546cbed5cf0233",
"RepoTags": [
"hello-world:latest"
],
"RepoDigests": [
"hello-world@sha256:c5515758d4c5e1e838e9cd307f6c6a0d620b5e07e6f927b07d05f6d12a1ac8d7"
],
"Parent": "",
"Comment": "",
"Created": "2017-01-13T22:50:56.415736637Z",
"Container": "d7e9f7ed9c135402fba7227d8da07c250126181eee0cfd2743b5736b80108625",
"ContainerConfig": {
"Hostname": "b3e3b3843b7f",
"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/sh",
"-c",
"#(nop) ",
"CMD [\"/hello\"]"
],
"Image": "sha256:fba45bbdabc1ff498b7965f99d2f25c59266cfa751067951f8e965841928c843",
"Volumes": null,
"WorkingDir": "",
"Entrypoint": null,
"OnBuild": null,
"Labels": {}
},
"DockerVersion": "1.12.3",
"Author": "",
"Config": {
"Hostname": "b3e3b3843b7f",
"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": [
"/hello"
],
"Image": "sha256:fba45bbdabc1ff498b7965f99d2f25c59266cfa751067951f8e965841928c843",
"Volumes": null,
"WorkingDir": "",
"Entrypoint": null,
"OnBuild": null,
"Labels": {}
},
"Architecture": "amd64",
"Os": "linux",
"Size": 1840,
"VirtualSize": 1840,
"GraphDriver": {
"Name": "aufs",
"Data": null
},
"RootFS": {
"Type": "layers",
"Layers": [
"sha256:98c944e98de8d35097100ff70a31083ec57704be0991a92c51700465e4544d08"
]
}
}
]
--ps查看进程
root@node1:~# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
命令docker ps 显示的是正在运行的Container列表，里面出现了刚才运行的nginx。于是可以把“容器（Container）”理解为镜像（Image）的一次运行。
查看宿主机运行着多少个容器，用docker ps 命令。
root@node1:~# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
a02bf766556c hello-world "/hello" 18 minutes ago Exited (0) 18 minutes ago loving_torvalds
b416c34db3b9 hello-world "/hello" 31 minutes ago Exited (0) 31 minutes ago suspicious_chandrasekhar
33e923cfb92a hello-world "/hello" 32 minutes ago Exited (0) 32 minutes ago zen_ramanujan
3379a0fb0214 hello-world "/hello" 53 minutes ago Exited (0) 53 minutes ago nifty_allen
--attach/start/stop/kill/restart/rm/logs/top命令
docker attach $container
docker start/stop/kill/restart/rm $container
docker start/stop/kill/restart/rm helloworld
docker logs $contain_name
docker logs $container_id
docker top helloworld
docker top helloworld
root@node1:~# docker info
Containers: 5
Running: 0
Paused: 0
Stopped: 5
Images: 1
Server Version: 17.03.1-ce
Storage Driver: aufs
Root Dir: /var/lib/docker/aufs
Backing Filesystem: extfs
Dirs: 11
Dirperm1 Supported: true
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
Volume: local
Network: bridge host macvlan null overlay
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 4ab9917febca54791c5f071a9d1f404867857fcc
runc version: 54296cf40ad8143b62dbcaa1d90e520a2136ddfe
init version: 949e6fa
Security Options:
apparmor
seccomp
Profile: default
Kernel Version: 4.8.0-22-generic
Operating System: Ubuntu 16.10
OSType: linux
Architecture: x86_64
CPUs: 4
Total Memory: 3.84 GiB
Name: node1
ID: DZO7:H3EE:BBCD:X44D:EOPL:37VU:VQVN:MRVR:JILJ:7NXV:T3FT:GQ3E
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
WARNING: No swap limit support
Experimental: false
Insecure Registries:
127.0.0.0/8
Live Restore Enabled: false
root@node1:~#
root@node1:~#
root@node1:~#
--build制作镜像
root@node1:~/testdocker# pwd
/root/testdocker
root@node1:~/testdocker# ls
app.py Dockerfile requirements.txt --三个文件
root@node1:~/testdocker# cat Dockerfile
# Use an official Python runtime as a base image
FROM python:2.7-slim
# Set the working directory to /app
WORKDIR /app
# Copy the current directory contents into the container at /app
ADD . /app
# Install any needed packages specified in requirements.txt
RUN pip install -r requirements.txt
# Make port 80 available to the world outside this container
EXPOSE 80
# Define environment variable
ENV NAME World
# Run app.py when the container launches
CMD ["python", "app.py"]
-----------------
root@node1:~/testdocker# cat requirements.txt
Flask
Redis
-----------------
root@node1:~/testdocker# cat app.py
from flask import Flask
from redis import Redis, RedisError
import os
import socket
# Connect to Redis
redis = Redis(host="redis", db=0, socket_connect_timeout=2, socket_timeout=2)
app = Flask(__name__)
@app.route("/")
def hello():
try:
visits = redis.incr("counter")
except RedisError:
visits = "<i>cannot connect to Redis, counter disabled</i>"
html = "<h3>Hello {name}!</h3>" \
"<b>Hostname:</b> {hostname}<br/>" \
"<b>Visits:</b> {visits}"
return html.format(name=os.getenv("NAME", "world"), hostname=socket.gethostname(), visits=visits)
if __name__ == "__main__":
app.run(host='0.0.0.0', port=80)
-----------------
root@node1:~/testdocker# docker build -t friendlyhello .
root@node1:~/testdocker# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
friendlyhello latest 6b1ec6201bc0 11 seconds ago 195 MB
python 2.7-slim 1c7128a655f6 2 weeks ago 183 MB
hello-world latest 48b5124b2768 4 months ago 1.84 kB
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