使用docker已经有1年多了,打算写一个系列,不知道能坚持吗?我太懒,只当为自己纪录吧!这一篇为docker基本使用文档!

Docker 是一個開源專案,誕生於 2013 年初,最初是 dotCloud 公司內部的一個業餘專案。它基於 Google 公司推出的 Go 語言實作。 專案後來加入了 Linux 基金會,遵從了 Apache 2.0 協議,原始碼在 GitHub 上進行維護。

网上文档成片,我就简单写写最佳实践吧。更多详细基础知识请参考文章最后的参考链接!

Docker for Centos 6.x

Docker最为一个目前最流行的容器技术,可以支持多平台,主流unix系统,甚至是windows系列都能安装!这里演示Centos安装docker方式。并且给予这个版本给一些案例演示!

Docker Install

Centos 6.x默认没用docker的镜像源,需要手动安装一个epel源才可以找到包,并且包名docker-io,而在centos 7.x的包名确实docker

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rpm -ivh https://dl.fedoraproject.org/pub/epel/epel-release-latest-6.noarch.rpm

yum info docker-io

sudo yum -y install docker-io

start docker

手动启动docker,并且设置为开机自动启动!

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/etc/init.d/docker start

chkconfig docker on

docker hub

docker提供一个类似github的平台,可以供大家上传自己制作好的images,带有一定软件功能的docker容器,供全球使用者随意pull下来使用,并且修改参与共享。这就是docker hub。但是由于网络种种原因,很多源下载很慢或者失败,重拾几次或者用一些国内提供的docker hub源地址替代官方提供的docker hub,这样加快镜像的构建速度!

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docker search centos

docker pull centos # For example: docker pull centos:5.11 or docker pull

docker images

dcoker container

  • 启动容器:docker run –name -h hostname
  • 停止容器:docker stop CONTAINER ID
  • 查看容器:docker ps
  • 进入容器:docker exec | docker attach
  • 删除容器:docker rm option [-f]
  • 运行容器日志:docker logs CONTAINER ID
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[root@server1 ~]# docker run centos /bin/echo 'Hello world'
Hello world

查看容器运行状态

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[root@server1 ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
8c0e090d5b87 centos "/bin/echo 'Hello wo About a minute ago Exited (0) About a minute ago sharp_cori

进入docker容器

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[root@server1 ~]# docker run --name mydocker -it centos /bin/bash 

[root@4875a51a97cb /]# ps aux
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.0 11720 1864 ? Ss 10:12 0:00 /bin/bash
root 18 0.0 0.0 35836 1488 ? R+ 10:13 0:00 ps aux

[root@4875a51a97cb tmp]# ls
ks-script-06FeP3

[root@4875a51a97cb tmp]# mkdir test

[root@4875a51a97cb tmp]# ls
ks-script-06FeP3 test

[root@4875a51a97cb tmp]# cat /etc/redhat-release
CentOS Linux release 7.2.1511 (Core)

[root@4875a51a97cb tmp]# exit
exit

[root@server1 ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
4875a51a97cb centos "/bin/bash" 12 minutes ago Exited (0) 27 seconds ago mydocker
8c0e090d5b87 centos "/bin/echo 'Hello wo 16 minutes ago Exited (0) 16 minutes ago sharp_cori

获取centos6.6容器

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[root@server1 ~]# docker pull centos:6.6

[root@server1 ~]# docker run --name mycentos -it centos:6.6 /bin/bash

[root@eae421cf2af9 /]# ip ad li # CentOS 7 容器没有自带这个命令
13: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP
link/ether 02:42:ac:11:00:03 brd ff:ff:ff:ff:ff:ff
inet 172.17.0.3/16 scope global eth0
inet6 fe80::42:acff:fe11:3/64 scope link
valid_lft forever preferred_lft forever
15: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever

[root@eae421cf2af9 /]# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 02:42:AC:11:00:03
inet addr:172.17.0.3 Bcast:0.0.0.0 Mask:255.255.0.0

[root@eae421cf2af9 /]# exit
exit

[root@server1 ~]# docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
centos latest 60e65a8e4030 6 weeks ago 196.6 MB
centos 6.6 12c9d795d85a 4 months ago 202.6 MB

启动终止容器

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[root@server1 ~]# docker ps -a  # CONTAINER ID

[root@server1 ~]# docker start eae421cf2af9
eae421cf2af9

[root@server1 ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
eae421cf2af9 centos:6.6 "/bin/bash" 4 minutes ago Up 19 seconds mycentos
4875a51a97cb centos "/bin/bash" 19 minutes ago Exited (0) 7 minutes ago mydocker
8c0e090d5b87 centos "/bin/echo 'Hello wo 24 minutes ago Exited (0) 24 minutes ago sharp_cori

[root@server1 ~]# docker stop eae421cf2af9
eae421cf2af9

[root@server1 ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
eae421cf2af9 centos:6.6 "/bin/bash" 5 minutes ago Exited (137) 8 seconds ago mycentos
4875a51a97cb centos "/bin/bash" 20 minutes ago Exited (0) 8 minutes ago mydocker
8c0e090d5b87 centos "/bin/echo 'Hello wo 25 minutes ago Exited (0) 25 minutes ago sharp_cori

容器后台运行

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[root@server1 ~]# docker run -d --name myid centos 
e2e9964282ab789a8f7cab4a397cbf22a8f91d83dbb80173698f1f64aa46b75e
[root@server1 ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
e2e9964282ab centos "/bin/bash" 3 seconds ago Exited (0) 3 seconds ago myid

[root@server1 ~]# docker run -d --name mycentos2 centos:6.6 /bin/bash
986e7a8976c2be2d2bb1707eacd3277a2c3368f95bb02ed0919c2abf7e4ef5ed
[root@server1 ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
986e7a8976c2 centos:6.6 "/bin/bash" 5 seconds ago Exited (0) 4 seconds ago mycentos2

[root@server1 ~]# docker run -d --name mynginx nginx
Unable to find image 'nginx:latest' locally
latest: Pulling from nginx
77e39ee82117: Pull complete
5eb1402f0414: Pull complete
2f4509f0578a: Pull complete
cc87edc856de: Pull complete
9b35f2e19927: Pull complete
6fbf62f05baf: Pull complete
d4202c2d289c: Pull complete
2b1e900b514d: Pull complete
Digest: sha256:c42cbe1c6f4e91aa873a23c988826e3604b0a1ae90aaf3351923db855a953399
Status: Downloaded newer image for nginx:latest
2d7a73f9f499f65a3ed5d27ff7f85660611dedc8dbefb475371bfa9c7643d9d6

[root@server1 ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
2d7a73f9f499 nginx "nginx -g 'daemon of About a minute ago Up About a minute 80/tcp, 443/tcp mynginx

[root@server1 ~]# docker ps -a|grep nginx
2d7a73f9f499 nginx "nginx -g 'daemon of 2 minutes ago Up 2 minutes 80/tcp, 443/tcp mynginx

删除容器,必须先停止容器

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[root@server1 ~]# docker rm 2d7a73f9f499
Error response from daemon: Cannot destroy container 2d7a73f9f499: Conflict, You cannot remove a running container. Stop the container before attempting removal or use -f
Error: failed to remove containers: [2d7a73f9f499]

[root@server1 ~]# docker rm 064fcc873164 #rm删除容器,rmi删除镜像
064fcc873164

[root@server1 ~]# docker rm 8965a9ba1b17 e2e9964282ab 986e7a8976c2
8965a9ba1b17
e2e9964282ab
986e7a8976c2

[root@server1 ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
2d7a73f9f499 nginx "nginx -g 'daemon of 7 minutes ago Up 7 minutes 80/tcp, 443/tcp mynginx
8c0e090d5b87 centos "/bin/echo 'Hello wo 46 minutes ago Exited (0) 46 minutes ago sharp_cori

进入已经运行的容器方式

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[root@server1 ~]# docker ps -l  #最后一个运行容器
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
2d7a73f9f499 nginx "nginx -g 'daemon of 15 minutes ago Up 15 minutes 80/tcp, 443/tcp mynginx

[root@server1 ~]# docker attach 2d7a73f9f499 #此命令有些时候无法进去容器,或者不支持,如果ctrl+c,那么容器会自动停止
^C[root@server1 ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
2d7a73f9f499 nginx "nginx -g 'daemon of 19 minutes ago Exited (0) 3 seconds ago mynginx

[root@server1 ~]# yum install util-linux #通过这个软件包提供的命令进入容器

[root@server1 ~]# docker start 2d7a73f9f499
2d7a73f9f499

[root@server1 ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
2d7a73f9f499 nginx "nginx -g 'daemon of 23 minutes ago Up 11 seconds 80/tcp, 443/tcp mynginx


[root@server1 ~]# docker inspect --format "{{.State.Pid}}" mynginx #获取容器运行的pid
5782

[root@server1 ~]# nsenter --target 5782 --mount --uts --ipc --net --pid
root@2d7a73f9f499:/#

root@2d7a73f9f499:/# ps aux
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.1 31484 2948 ? Ss 11:09 0:00 nginx: master process nginx -g daemon off;
nginx 6 0.0 0.0 31860 1716 ? S 11:09 0:00 nginx: worker process
root 7 0.0 0.1 20232 2028 ? S 11:13 0:00 -bash

root@2d7a73f9f499:/# cat /etc/nginx/nginx.conf

root@2d7a73f9f499:/# cd /etc/nginx/

root@2d7a73f9f499:/etc/nginx# cat conf.d/default.conf |grep root
root /usr/share/nginx/html; #nginx root目录

root@2d7a73f9f499:~# exit
logout

[root@server1 ~]# cat in.sh #进入容器脚本
#!/bin/bash
CNAME=$1
CPID=$(docker inspect --format "{{.State.Pid}}" $CNAME)
nsenter --target "$CPID" --mount --uts --ipc --net --pid

[root@server1 ~]# sh in.sh mynginx
root@2d7a73f9f499:/# exit
logout

docker 网络访问

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[root@server1 ~]# brctl show
bridge name bridge id STP enabled interfaces
docker0 8000.dad9e43403b6 no veth44be944
virbr0 8000.525400353d8e yes virbr0-nic

[root@server1 ~]# iptables -t nat -L -n
Chain PREROUTING (policy ACCEPT)
target prot opt source destination
DOCKER all -- 0.0.0.0/0 0.0.0.0/0 ADDRTYPE match dst-type LOCAL

Chain POSTROUTING (policy ACCEPT)
target prot opt source destination
MASQUERADE tcp -- 192.168.122.0/24 !192.168.122.0/24 masq ports: 1024-65535
MASQUERADE udp -- 192.168.122.0/24 !192.168.122.0/24 masq ports: 1024-65535
MASQUERADE all -- 192.168.122.0/24 !192.168.122.0/24
MASQUERADE all -- 172.17.0.0/16 0.0.0.0/0

Chain OUTPUT (policy ACCEPT)
target prot opt source destination
DOCKER all -- 0.0.0.0/0 !127.0.0.0/8 ADDRTYPE match dst-type LOCAL

Chain DOCKER (2 references)
target prot opt source destination

[root@server1 ~]# sh in.sh mynginx #进入容器可以上网
root@2d7a73f9f499:/# ping baidu.com
PING baidu.com (123.125.114.144): 56 data bytes
64 bytes from 123.125.114.144: icmp_seq=0 ttl=50 time=77.808 ms

root@2d7a73f9f499:/# ip ad li
37: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP
link/ether 02:42:ac:11:00:0b brd ff:ff:ff:ff:ff:ff
inet 172.17.0.11/16 scope global eth0
inet6 fe80::42:acff:fe11:b/64 scope link
valid_lft forever preferred_lft forever
39: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever

root@2d7a73f9f499:/# ping 192.168.2.1
PING 192.168.2.1 (192.168.2.1): 56 data bytes
64 bytes from 192.168.2.1: icmp_seq=0 ttl=63 time=2.125 ms

root@2d7a73f9f499:/# ping 192.168.199.1
PING 192.168.199.1 (192.168.199.1): 56 data bytes
64 bytes from 192.168.199.1: icmp_seq=0 ttl=251 time=6.571 ms

root@2d7a73f9f499:/# ip ro li
172.17.0.0/16 dev eth0 proto kernel scope link src 172.17.0.11
default via 172.17.42.1 dev eth0

root@2d7a73f9f499:/# exit
logout
[root@server1 ~]# ifconfig
docker0 Link encap:Ethernet HWaddr DA:D9:E4:34:03:B6
inet addr:172.17.42.1 Bcast:0.0.0.0 Mask:255.255.0.0
inet6 addr: fe80::7458:f8ff:fe2d:bec/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:62 errors:0 dropped:0 overruns:0 frame:0
TX packets:21 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:4163 (4.0 KiB) TX bytes:1891 (1.8 KiB)

docker提供一种端口映射功能,可以让我们访问宿主机IP,可以转发到容器内部,某个服务的端口,从而达到访问容器内服务的目的。有两种端口映射方式:1.随机映射 2.指定映射

随机映射容器端口到宿主机

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[root@server1 ~]# docker run -P -d --name mynginx1 nginx
711c8bc3077d27196c4263cc75bb7fcb7f0bf2c02fb120054f011b9b9b134847

[root@server1 ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
711c8bc3077d nginx "nginx -g 'daemon of 27 seconds ago Up 27 seconds 0.0.0.0:32769->80/tcp, 0.0.0.0:32768->443/tcp mynginx1
2d7a73f9f499 nginx "nginx -g 'daemon of 59 minutes ago Up 35 minutes 80/tcp, 443/tcp mynginx

运行如上命令后,通过docker ps -l可以看到最后运行容器的信息,在这个时候通过宿主机IP:32769即可访问到容器中的nginx服务。

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#获取运行容器的ip地址
[root@server1 ~]# docker inspect --format="{{.NetworkSettings.IPAddress}}" 39979df7a280
172.17.0.13
[root@server1 ~]# docker inspect --format="{{.NetworkSettings.IPAddress}}" mynginx2
172.17.0.13
[root@server1 ~]# docker inspect --format="{{.NetworkSettings.IPAddress}}" mynginx1
172.17.0.12

指定映射

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[root@server1 ~]# docker stop 2d7a73f9f499
2d7a73f9f499

[root@server1 ~]# docker rm 2d7a73f9f499
2d7a73f9f499
[root@server1 ~]# docker ps -a

[root@server1 ~]# docker run -d -p 91:80 --name mynginx2 nginx
39979df7a280af50b1778094064002c413ebc47bba76133790c6c82663e242ed

[root@server1 ~]# docker ps -l
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
39979df7a280 nginx "nginx -g 'daemon of 22 seconds ago Up 21 seconds 443/tcp, 0.0.0.0:91->80/tcp

运行如上命令,访问宿主机ip:91即可访问到容器中的nginx.

docker 数据管理

docker提供volume映射的方式,达到容器数据的持久化,为了保证容器一次构建全世界运行,所以不能依赖太多系统的特定变量。无状态的服务最理想化,但是很多时候有状态的服务有需要持久化存储数据,所以诞生这个功能。

数据卷

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[root@server1 ~]# docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
nginx latest 2b1e900b514d 2 weeks ago 134.4 MB
centos latest 60e65a8e4030 6 weeks ago 196.6 MB
centos 6.6 12c9d795d85a 4 months ago 202.6 MB

[root@server1 ~]# docker ps -l
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
39979df7a280 nginx "nginx -g 'daemon of 2 hours ago Up 2 hours 443/tcp, 0.0.0.0:91->80/tcp mynginx2

#启动一个容器centos,并且创建一个/data的数据卷
[root@server1 ~]# docker run -it --name volume-test1 -h nginx -v /data centos
[root@nginx /]# ps aux
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.0 11720 1868 ? Ss 14:11 0:00 /bin/bash

[root@nginx /]# ls -ld /data/
drwxr-xr-x 2 root root 4096 Feb 11 14:11 /data/

[root@nginx /]# df -h|grep data
/dev/sda1 20G 6.3G 13G 34% /data

#通过数据卷,容器把数据写入到物理主机那个地方,下面命令查看?
[root@server1 ~]# docker inspect -f {{.Volumes}} volume-test1
map[/data:/var/lib/docker/volumes/3f68063a817fee1155f4f50826eee3cf13827d4118fc4f614159dcb44431f88a/_data]

[root@server1~]# ls /var/lib/docker/volumes/3f68063a817fee1155f4f50826eee3cf13827d4118fc4f614159dcb44431f88a/_data/

[root@nginx /]# cd /data/
[root@nginx data]# pwd
/data
[root@nginx data]# touch docker_v

[root@server1 ~]# ls -l /var/lib/docker/volumes/3f68063a817fee1155f4f50826eee3cf13827d4118fc4f614159dcb44431f88a/_data/
total 0
-rw-r--r-- 1 root root 0 Feb 11 22:18 docker_v

#指定物理主机的一个目录,挂载到容器中的如何实现?
[root@server1 ~]# docker run -it --name volume-test2 -h centos -v /data:/data centos
[root@centos /]# ls /data/
CentOS-6.6-x86_64-bin-DVD1.iso Centos-6.6-x68_64.raw dfs journal

[root@centos /]# ping baidu.com
PING baidu.com (220.181.57.217) 56(84) bytes of data.
64 bytes from 220.181.57.217: icmp_seq=1 ttl=53 time=76.7 ms

#挂载的目录为只读,不能写!在容器中无法写…
[root@server1 ~]# docker run -it --name volume-test2 -h centos -v /data:/data:ro centos

#挂载文件到容器,没有生效,新版可能不支持了
[root@server1 ~]# docker run -it --name volume-test3 -h centos -v /etc/hosts:/etc/hosts centos
[root@centos /]# cat /etc/hosts
172.17.0.17 centos
127.0.0.1 localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

数据卷容器

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[root@server1 ~]# docker run -it --name volume-test1 -h centos -v /data:/data centos  
[root@centos /]# exit
exit

[root@server1 ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
af47fece9654 centos "/bin/bash" 7 seconds ago Exited (0) 4 seconds ago volume-test1
39979df7a280 nginx "nginx -g 'daemon of 2 hours ago Up 2 hours 443/tcp, 0.0.0.0:91->80/tcp mynginx2

#数据卷容器,使用其他容器已经挂载的数据卷路径,所有容器共享一个数据卷?
[root@server1 ~]# docker run -it --name volume-test2 -h centos --volumes-from volume-test1 centos
[root@centos /]# ls /data/
CentOS-6.6-x86_64-bin-DVD1.iso Centos-6.6-x68_64.raw dfs journal

docker 镜像构建

手动构建镜像

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#基于源码构建nginx镜像
$ yum install gcc-c++
$ yum install zlib zlib-devel
$ yum install openssl openssl--devel
[root@nginx /]# rpm -ivh http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm

[root@server1 ~]# docker run --name nginx -h nginx -it centos:6.6 /bin/bash
注意:centos的镜像,不知道为何,在redhat宿主机运行,编译nginx不能通过…最后我只能在centos虚拟机重新尝试…编译报错:checking for C compiler ... found;替换了操作系统为centos依然如此,说明不是操作系统的问题,而是镜像问题,可忽略继续安装!

+++++++++++++++++++++++++++++++++++++++++++++++++
[root@centos ~]# cat /etc/redhat-release
CentOS release 6.6 (Final)

[root@centos ~]# docker run --name nginx -h nginx -it centos:6.6 /bin/bash

[root@centos ~]# docker ps -a
++++++++++++++++++++++++++++++++++++++++++++++++++

[root@centos ~]# docker images

[root@centos ~]# docker pull nginx

[root@centos ~]# docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
nginx latest 2b1e900b514d 2 weeks ago 134.4 MB
centos 6.6 12c9d795d85a 4 months ago 202.6 MB

[root@centos ~]# docker run --name nginx -h nginx -it centos:6.6 /bin/bash
[root@nginx /]# yum install -y wget gcc gcc-c++ make openssl openssl-devel tar

[root@nginx /]# wget http://nginx.org/download/nginx-1.9.11.tar.gz

---nginx的pcre模块
http://www.pcre.org/
[root@nginx /]# wget ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-8.37.tar.gz

[root@nginx /]# mv *.gz /usr/local/src/
[root@nginx /]# cd /usr/local/src/

[root@nginx src]# tar zxf pcre-8.37.tar.gz
[root@nginx src]# tar zxf nginx-1.9.11.tar.gz

[root@nginx src]# useradd -s /sbin/nologin -M www

[root@nginx src]# cd nginx-1.9.11
[root@nginx nginx-1.9.11]# ./configure --prefix=/usr/local/nginx --user=www --group=www --with-http_ssl_module --with-http_sub_module --with-pcre=/usr/local/src/pcre-8.37

[root@nginx nginx-1.9.11]# make

[root@nginx nginx-1.9.11]# make install

[root@nginx nginx-1.9.11]# ls -ld /usr/local/nginx
drwxr-xr-x 6 root root 4096 Feb 11 15:50 /usr/local/nginx

# 让容器启动的时候自动启动nginx,而nginx必须前台运行,nginx默认后台运行;docker会判断运行状态,导致运行之后就结束了,而没有达到启动nginx的目的
[root@nginx nginx-1.9.11]# yum install vim -y

[root@nginx nginx-1.9.11]# vim /usr/local/nginx/conf/nginx.conf
[root@nginx nginx-1.9.11]# head -1 /usr/local/nginx/conf/nginx.conf
daemon off;

[root@nginx nginx-1.9.11]# echo '/usr/local/nginx/sbin/nginx' > /etc/rc.local
[root@nginx nginx-1.9.11]# tail -1 /etc/rc.local
/usr/local/nginx/sbin/nginx
[root@nginx nginx-1.9.11]# exit;
exit

[root@centos ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
f0031b268b26 centos:6.6 "/bin/bash" About an hour ago Exited (0) 24 seconds ago nginx
[root@centos ~]# docker commit -m "centos6.6 and nginx-1.9.11" f0031b268b26 skyneteye/nginx:v1
9e78179003020986a7c970c314faff22706b55d762913d7b7f9e2d16702371e5


#测试构建的镜像
[root@centos ~]# docker run -d -p 92:80 skyneteye/nginx:v1
012e567670badb4983ba17066077ac27247c4befa8e999bedf4769a885db0795

============== 运行完成之后就自动退出了….

[root@centos ~]# docker run -it -h nginx skyneteye/nginx:v1
[root@nginx /]# vim /etc/rc.local
[root@nginx /]# cat /etc/rc.local
#!/bin/sh
#
# This script will be executed *after* all the other init scripts.
# You can put your own initialization stuff in here if you don't
# want to do the full Sys V style init stuff.

touch /var/lock/subsys/local
[root@nginx /]# exit;
exit

[root@centos ~]# docker ps -l
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
5bfbd3201b47 skyneteye/nginx:v1 "/bin/bash" About a minute ago Exited (0) 29 seconds ago kickass_wozniak
[root@centos ~]# docker commit -m "nginx v2" 5bfbd3201b47 skyneteye/nginx:v2
09c13432f72b6222df4aad7c71722354916a6dc7e03ecefbf43a530aedae8e09

[root@centos ~]# docker images

[root@centos ~]# docker run -d -p 99:80 skyneteye/nginx:v2 /usr/local/nginx/sbin/nginx
e30d529b741fe2c8152c6deba08dc9068cc59635fb3e2648992ea7910988c2d3
[root@centos ~]# docker ps -l
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
e30d529b741f skyneteye/nginx:v2 "/usr/local/nginx/sb 17 seconds ago Up 16 seconds 0.0.0.0:99->80/tcp boring_franklin

执行如上最后一步命令,可以在宿主机IP:99访问到我们自己手动构建的nginx镜像。

dockerfile

  • 基础语法
    • FROM 依赖的基础镜像
    • MAINTAINER 维护者信息
    • RUN Linux命令都加到RUN命令
    • ADD COPY文件,会自动解压
    • WORKDIR 当前工作目录
    • VOLUME 目录挂在映射
    • EXPOSE 端口
    • RUN 运行容器
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[root@centos ~]# mkdir /opt/docker-file
[root@centos ~]# cd /opt/docker-file/
[root@centos docker-file]# mkdir nginx
[root@centos docker-file]# cd nginx/
[root@centos nginx]# pwd
/opt/docker-file/nginx
[root@centos nginx]# ls
nginx-1.9.11.tar.gz pcre-8.37.tar.gz

[root@centos nginx]# vim Dockerfile
[root@centos nginx]# cat Dockerfile
# This is My first Dockerfile
# version 1.0
# Author: whoami

# Base images
FROM centos:6.6

# MAINTAINER info
MAINTAINER "you" <skynet199@foxmail.com>

# ADD
ADD nginx-1.9.11.tar.gz /usr/local/src
ADD pcre-8.37.tar.gz /usr/local/src

# RUN
RUN yum install -y wget gcc gcc-c++ make openssl-devel tar
RUN useradd -s /sbin/nologin -M www

#WORKDIR
WORKDIR /usr/local/src/nginx-1.9.11
RUN ./configure --prefix=/usr/local/nginx --user=www --group=www --with-http_ssl_module --with-http_sub_module --with-pcre=/usr/local/src/pcre-8.37 && make && make install

RUN echo "daemon off;" >> /usr/local/nginx/conf/nginx.conf

# ENV
ENV PATH /usr/local/nginx/sbin:$PATH

# EXPOSE
EXPOSE 80

# VOLUME
# VOLUME [ "/sys/fs/cgroup" ]

# CMD
CMD ["nginx"]

[root@centos nginx]# docker build -t nginx:1.9.11 /opt/docker-file/nginx/

此命令构建成功之后,即可开始测试容器的构建是否正确

[root@centos nginx]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
f0031b268b26 centos:6.6 "/bin/bash" 2 hours ago Exited (0) About an hour ago nginx

#前台运行
[root@centos nginx]# docker run -ti -v /data:/data:ro -p 80:80 nginx:1.9.11

#进入容器
[root@centos nginx]# docker run –d -h nginx -ti -v /data:/data:ro -p 80:80 nginx:1.9.11
247d1840b02e439872972832024517f306630f96f122a981e80f0a2a3948cd71

[root@centos nginx]# docker ps -l
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
247d1840b02e nginx:1.9.11 "nginx" 18 seconds ago Up 17 seconds 0.0.0.0:80->80/tcp distracted_meitner

[root@centos nginx]# docker inspect --format "{{.State.Pid}}" 247d1840b02e
52876
[root@centos nginx]# nsenter --target 52876 --mount --uts --ipc --net --pid

[root@247d1840b02e /]# yum install lsof -y

#删除镜像
[root@centos nginx]# docker rmi -f nginx:1.9.11

DockerUI & Shipyard && swarm

docker可视化管理软件,docker集群的实现,后续内容介绍!

Docker-compose

https://www.docker.com/products/docker-compose

Docker Swarm

https://www.docker.com/products/docker-swarm

Docker-machine

https://www.docker.com/products/docker-machine

Install kali-linux-docker for Mac

http://linux.im/2015/05/28/kali-linux-docker.html

优雅退出容器不会导致容器停止

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Ctrl+P+Q

参考:https://www.docker.com/
https://philipzheng.gitbooks.io/docker_practice/content/introduction/what.html
https://yeasy.gitbooks.io/docker_practice/content/introduction/what.html

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