docker的应用

[root@yz6205 ~]# docker images
INFO[0063] GET /v1.19/images/json
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
ubuntu latest 7bd023c8937d 41 hours ago 122 MB
ubuntu 14.04 0e7d4a488bcc 41 hours ago 187.9 MB
centos latest db0f5936b391 11 days ago 196.7 MB
[root@yz6205 ~]# docker run -t -i ubuntu /bin/bash
INFO[0127] POST /v1.19/containers/create
INFO[0143] POST /v1.19/containers/5b1280645766492db1bf43f54a17b934038a2bfa3b9a45ba161bd0653e406a78/attach?stderr=1&stdin=1&stdout=1&stream=1
INFO[0143] POST /v1.19/containers/5b1280645766492db1bf43f54a17b934038a2bfa3b9a45ba161bd0653e406a78/start
INFO[0143] POST /v1.19/containers/5b1280645766492db1bf43f54a17b934038a2bfa3b9a45ba161bd0653e406a78/resize?h=26&w=121
root@5b1280645766:/#

创建镜像
1，基于已有镜像的容器创建
root@68dea79aa079:~# cat /etc/issue
Ubuntu 16.04 LTS \n \l

[root@yz6205 ~]# docker commit -m "Add a new file" -a "docker newbee" 68dea79aa079 test
933b24d02ecfacb81ad0afa1c0d85d651eeea8dba3c6e2ec0e3859fff92eb9a2
[root@yz6205 ~]# docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
test latest 933b24d02ecf About a minute ago 122 MB
ubuntu latest 7bd023c8937d 41 hours ago 122 MB

存入镜像
[root@yz6205 ~]# docker save -o ubuntu_14.04.tar 933b24d02ecf

载入镜像
[root@yz6205 ~]# docker load --input ubuntu_14.04.tar
或者：
[root@yz6205 ~]# docker load < ubuntu_14.04.tar

查看log信息
[root@yz6205 ~]# docker ps -l
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
074b5ad4936f ubuntu "/bin/bash" About a minute ago Exited (0) 44 seconds ago admiring_mccarthy
[root@yz6205 ~]# docker logs 074
root@074b5ad4936f:/# pwd
/
root@074b5ad4936f:/# ls
bin boot dev etc home lib lib64 media mnt opt proc root run sbin srv sys tmp usr var
root@074b5ad4936f:/# ps
PID TTY TIME CMD
1 ? 00:00:00 bash
13 ? 00:00:00 ps
root@074b5ad4936f:/# exit
exit

终止容器
[root@yz6205 ~]# docker stop 074
074
[root@yz6205 ~]# docker ps -l
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
074b5ad4936f ubuntu "/bin/bash" 5 minutes ago Exited (0) 4 minutes ago admiring_mccarthy
[root@yz6205 ~]# docker start 074
074
[root@yz6205 ~]# docker ps -l
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
074b5ad4936f ubuntu "/bin/bash" 5 minutes ago Up 1 seconds

查看处于终止状态下的容器的ID信息
[root@yz6205 ~]# docker ps -a -q
074b5ad4936f
67156b0cfc7c
68dea79aa079
5b1280645766
d65d3ac7c374
10bbf0542e24
33e3c46add98
dac0735f6767
31472d1eefcb

重启docker
[root@yz6205 ~]# docker restart 074
074
[root@yz6205 ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
074b5ad4936f ubuntu "/bin/bash" 8 minutes ago Up 9 seconds admiring_mccarthy

-d参数，容器启动后讲进入后台
[root@yz6205 ~]# docker run -idt centos
193840bce6de1e26e1263239c7a3fee9c9bb2c8e9b0f43fe0ba4084676e37bfd

[root@yz6205 ~]# docker ps -l
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
193840bce6de centos "/bin/bash" 48 seconds ago Up 36 seconds sad_albattani

可使docket attach 、docket exec 、nsenter等工具查看
[root@yz6205 ~]# docker attach sad_albattani
[root@193840bce6de /]#

[root@yz6205 ~]# docker exec -ti 193840bce6de /bin/bash
[root@193840bce6de /]#

导出容器
[root@yz6205 soft]# docker export 193 > 193840bce6de_centos_tar
[root@yz6205 soft]# ls
193840bce6de_centos_tar

docker登陆注册
[root@yz6205 soft]# docker login
Username: yongsan
Password: 123qwe
Email: yongsan@staff.sina.com.cn
WARNING: login credentials saved in /root/.docker/config.json
Account created. Please use the confirmation link we sent to your e-mail to activate it.

使用registry创建私有仓库
[root@yz6205 soft]# docker run -d -p 5000:5000 registry
Unable to find image 'registry:latest' locally
latest: Pulling from registry
f15ce52fc004: Pull complete
c4fae638e7ce: Pull complete
a4c5be5b6e59: Pull complete
8693db7e8a00: Pull complete
c75fbf48538e: Downloading [=======================================> ] 70.28 MB/89.2 MB
87c008f1a79b: Download complete
5a7b60cbc471: Download complete
81569492134a: Download complete
0aed6b236dec: Download complete

管理私有仓库
docker tag 命令给镜像标记重命名
[root@yz6205 soft]# docker tag ubuntu:14.04 10.39.6.205:5000/test
[root@yz6205 soft]# docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
test centos 2a3044c7fb64 58 minutes ago 196.7 MB
test 193840bce6de a753d5365391 59 minutes ago 196.7 MB
ubuntu latest 7bd023c8937d 43 hours ago 122 MB
10.39.6.205:5000/test latest 0e7d4a488bcc 43 hours ago 187.9 MB

下面使用training/webapp 镜像创建一个web容器，并创建一个数据卷挂载到容器的/data0/soft目录
[root@yz6205 soft]# docker run -d --name web -v /data0/soft training/webapp python app.py
Unable to find image 'training/webapp:latest' locally
latest: Pulling from training/webapp
e9e06b06e14c: Pull complete
a82efea989f9: Pull complete
37bea4ee0c81: Pull complete
07f8e8c5e660: Pull complete
23f0158a1fbe: Pull complete
0a4852b23749: Pull complete
7d0ff9745632: Pull complete
99b0d955e85d: Pull complete
33e109f2ff13: Pull complete
cc06fd877d54: Pull complete
b1ae241d644a: Pull complete
b37deb56df95: Pull complete
02a8815912ca: Already exists
Digest: sha256:06e9c1983bd6d5db5fba376ccd63bfa529e8d02f23d5079b8f74a616308fb11d
Status: Downloaded newer image for training/webapp:latest
1c413b58919b2728cabede1639d1a12fa72fe74ab3cfee56a76fdb6ae1bc416a

-p/P指定端口
[root@yz6205 soft]# docker run -d -P training/webapp python app.py
48beffc1c93351262ef03c9f65e7f4364e5e6414f3e40bd5db256771f0110102

[root@yz6205 dir]# docker ps -l
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
48beffc1c933 training/webapp "python app.py" 44 seconds ago Up 27 seconds 0.0.0.0:32768->5000/tcp clever_goodall

访问宿主机的32768端口即可访问容器内web应用提供的页面了
[root@yz6205 soft]# curl http://10.39.6.205:32768 Hello world![root@yz6205 soft]#

[root@yz6205 dir]# docker logs -f clever_goodall
* Running on http://0.0.0.0:5000/ (Press CTRL+C to quit)
* Running on http://0.0.0.0:5000/ (Press CTRL+C to quit)
10.39.6.205 - - [29/May/2016 11:23:47] "GET / HTTP/1.1" 200 -
10.212.60.113 - - [29/May/2016 11:24:10] "GET / HTTP/1.1" 200 -
10.212.60.113 - - [29/May/2016 11:24:10] "GET /favicon.ico HTTP/1.1" 404 -

-p可以将本地的5000端口映射到容器的5000端口
[root@yz6205 soft]# docker run -d -p 5000:5000 training/webapp python app.py
b801e4036691e60b0b671883e4b06b8414aef23e495ed2b8cbe7f841c7a8746b

[root@yz6205 soft]# docker ps -l
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
b801e4036691 training/webapp "python app.py" 56 seconds ago Up 35 seconds 0.0.0.0:5000->5000/tcp prickly_yonath