Docker 学习8 Dockerfile详解2

一、继续上章节Docker学习7 CMD命令后。

　　11、ENTRYPOINT

　　　　a、容器启动后相当于会启动ENTRYPOINT + CMD 命令，CMD相当于参数传给entrypoint的

[root@localhost images2]# cat Dockerfile

FROM  busybox

LABEL maintainer="wohaoshuai <wohaoshuai@qq.com>" app="httpd"

ENV WEB_DOC_ROOT="/data/web/html"

RUN mkdir -p ${WEB_DOC_ROOT} && \

    echo "<h1>Busybox httpd server.</h1>" > ${WEB_DOC_ROOT}/index.html

#CMD /bin/httpd -f -h ${WEB_DOC_ROOT}

#CMD ["/bin/sh","-c","/bin/httpd -f -h ${WEB_DOC_ROOT}"]

ENTRYPOINT /bin/httpd -f -h ${WEB_DOC_ROOT}

[root@localhost images2]# docker build -t wohaoshuaihttpd:v0.- ./

Sending build context to Docker daemon  .048kB

Step / : FROM  busybox

 ---> af2f74c517aa

Step / : LABEL maintainer="wohaoshuai <wohaoshuai@qq.com>" app="httpd"

 ---> Using cache

 ---> b94158ebd25b

Step / : ENV WEB_DOC_ROOT="/data/web/html"

 ---> Using cache

 ---> 128dc125c148

Step / : RUN mkdir -p ${WEB_DOC_ROOT} &&     echo "<h1>Busybox httpd server.</h1>" > ${WEB_DOC_ROOT}/index.html

 ---> Using cache

 ---> 79e6d697305f

Step / : ENTRYPOINT /bin/httpd -f -h ${WEB_DOC_ROOT}

 ---> Running in 322af685179f

Removing intermediate container 322af685179f

 ---> 26837ef4211b

Successfully built 26837ef4211b

Successfully tagged wohaoshuaihttpd:v0.-

[root@localhost images2]# docker run -it --rm -P --name wohaoshuai1 wohaoshuaihttpd:v0.- ls /data/web/html

[root@localhost images2]# docker inspect -f {{.Args}} wohaoshuai1 　　#此时可以看到我们覆盖的CMD命令自动追加到了ENTRYPOINT提供的命令后面，相当于容器一启动的时候就会启动 ENTRYPOINT + CMD命令

[-c /bin/httpd -f -h ${WEB_DOC_ROOT} ls /data/web/html]

　　　　b、ENTRYPOINT + CMD组合

[root@localhost images2]# cat Dockerfile

FROM  busybox

LABEL maintainer="wohaoshuai <wohaoshuai@qq.com>" app="httpd"

ENV WEB_DOC_ROOT="/data/web/html"

RUN mkdir -p ${WEB_DOC_ROOT} && \

    echo "<h1>Busybox httpd server.</h1>" > ${WEB_DOC_ROOT}/index.html

#CMD /bin/httpd -f -h ${WEB_DOC_ROOT}

CMD ["/bin/httpd -f -h ${WEB_DOC_ROOT}"]

ENTRYPOINT ["/bin/sh","-c"]

[root@localhost images2]# docker build -t wohaoshuaihttpd:v0.- ./

Sending build context to Docker daemon  .048kB

Step / : FROM  busybox

 ---> af2f74c517aa

Step / : LABEL maintainer="wohaoshuai <wohaoshuai@qq.com>" app="httpd"

 ---> Using cache

 ---> b94158ebd25b

Step / : ENV WEB_DOC_ROOT="/data/web/html"

 ---> Using cache

 ---> 128dc125c148

Step / : RUN mkdir -p ${WEB_DOC_ROOT} &&     echo "<h1>Busybox httpd server.</h1>" > ${WEB_DOC_ROOT}/index.html

 ---> Using cache

 ---> 79e6d697305f

Step / : CMD ["/bin/httpd -f -h ${WEB_DOC_ROOT}"]

 ---> Running in 633c17c96e88

Removing intermediate container 633c17c96e88

 ---> 997c922b10f0

Step / : ENTRYPOINT ["/bin/sh","-c"]

 ---> Running in 3838dded3dfe

Removing intermediate container 3838dded3dfe

 ---> 9df599309f9a

Successfully built 9df599309f9a

Successfully tagged wohaoshuaihttpd:v0.-

[root@localhost images2]# docker run -it --rm -P --name wohaoshuai1 wohaoshuaihttpd:v0.-

[root@localhost ~]# docker inspect -f {{.Config.Cmd}}  wohaoshuai1

[/bin/httpd -f -h ${WEB_DOC_ROOT}]

[root@localhost ~]# docker inspect -f {{.Config.Entrypoint}} wohaoshuai1

[/bin/sh -c]

[root@localhost images2]# docker run -it --rm -P --name wohaoshuai1 wohaoshuaihttpd:v0.2-7 ls /data
bin data dev etc home proc root sys tmp usr var
[root@localhost images2]#

　　c、启动nginx案例

[root@localhost images3]# cat Dockerfile

FROM nginx:1.14-alpine

LABEL maintainer="wohaoshuai <wohaoshuai@qq.com>"

ENV NGX_DOC_ROOT="/data/web/html/"

ADD index.html ${NGX_DOC_ROOT}

ADD entrypoint.sh /bin/

CMD ["/usr/sbin/nginx","-g","daemon off;"]

ENTRYPOINT ["/bin/entrypoint.sh"]

[root@localhost images3]#

[root@localhost images3]#

[root@localhost images3]# cat entrypoint.sh

#!/bin/sh

#

cat > /etc/nginx/conf.d/www.conf <<EOF

server {

    server_name $HOSTNAME;

    listen ${IP:-0.0.0.0}:${PORT:-};

    root    ${NGX_DOC_ROOT:-/usr/share/nginx/html};

}

EOF

#执行所有参数

exec "$@" 

[root@localhost images3]# docker build -t wohaoshuaihttpd:v0.- ./

Sending build context to Docker daemon  .096kB

Step / : FROM nginx:1.14-alpine

 ---> 8a2fb25a19f5

Step / : LABEL maintainer="wohaoshuai <wohaoshuai@qq.com>"

 ---> Using cache

 ---> d073a723c02f

Step / : ENV NGX_DOC_ROOT="/data/web/html/"

 ---> Using cache

 ---> e1f5eb1ad38b

Step / : ADD index.html ${NGX_DOC_ROOT}

 ---> e070ca432d81

Step / : ADD entrypoint.sh /bin/

 ---> f45f6cba97b6

Step / : CMD ["/usr/sbin/nginx","-g","daemon off;"]

 ---> Running in c4e622170dc8

Removing intermediate container c4e622170dc8

 ---> 0bfde2a829f4

Step / : ENTRYPOINT ["/bin/entrypoint.sh"]

 ---> Running in bb3787180bc6

Removing intermediate container bb3787180bc6

 ---> 0ae588a1c9ff

Successfully built 0ae588a1c9ff

Successfully tagged wohaoshuaihttpd:v0.-

[root@localhost images3]# docker run --name wohaoshuai1 --rm -P  wohaoshuaihttpd:v0.-

172.17.0.1 - - [/Apr/::: +] "GET / HTTP/1.1"   "-" "curl/7.29.0" "-"

172.17.0.2 - - [/Apr/::: +] "GET / HTTP/1.1"   "-" "Wget" "-"

[root@localhost ~]# docker exec -it wohaoshuai1 /bin/sh

/ # cat /etc/nginx/conf.d/

default.conf  www.conf

/ # cat /etc/nginx/conf.d/www.conf

server {

    server_name 9243f356a5b7;

    listen 0.0.0.0:;

    root    /data/web/html/;

}

/ # wget -O - -q 9243f356a5b7

<h1>NEW DOC ROOT for NGINX</h1>

/ # ps

　　PID USER TIME COMMAND
　　1 root 0:00 nginx: master process /usr/sbin/nginx -g daemon off; #因为脚本中使用了exec 因此确保了主进程ID号为 1
　　9 nginx 0:00 nginx: worker process
　　18 root 0:00 /bin/sh
　　24 root 0:00 ps

　　12、USER

　　13、HEALTHCHECK

　　　　a、如图，每隔5分钟检测一次，超时时间为3秒，使用命令 curl ，如果失败则状态1退出。

[root@localhost images3]# cat Dockerfile

FROM nginx:1.14-alpine

LABEL maintainer="wohaoshuai <wohaoshuai@qq.com>"

ENV NGX_DOC_ROOT="/data/web/html/"

ADD index.html ${NGX_DOC_ROOT}

ADD entrypoint.sh /bin/

EXPOSE /tcp

#3s后再做检测

HEALTHCHECK --start-period=3s CMD wget -O - -q http://${IP:-0.0.0.0}:${PORT:-80}/

CMD ["/usr/sbin/nginx","-g","daemon off;"]

ENTRYPOINT ["/bin/entrypoint.sh"]

[root@localhost images3]# docker build -t wohaoshuaihttpd:v0.- ./

Sending build context to Docker daemon  .096kB

Step / : FROM nginx:1.14-alpine

 ---> 8a2fb25a19f5

Step / : LABEL maintainer="wohaoshuai <wohaoshuai@qq.com>"

 ---> Using cache

 ---> d073a723c02f

Step / : ENV NGX_DOC_ROOT="/data/web/html/"

 ---> Using cache

 ---> e1f5eb1ad38b

Step / : ADD index.html ${NGX_DOC_ROOT}

 ---> Using cache

 ---> e070ca432d81

Step / : ADD entrypoint.sh /bin/

 ---> Using cache

 ---> f45f6cba97b6

Step / : EXPOSE /tcp

 ---> Running in b9bf91ef24fa

Removing intermediate container b9bf91ef24fa

 ---> fdea2cc4ac14

Step / : HEALTHCHECK --start-period=3s CMD wget -O - -q http://${IP:-0.0.0.0}:${PORT:-80}/

 ---> Running in 68abb31eacf2

Removing intermediate container 68abb31eacf2

 ---> a5d76a9959fa

Step / : CMD ["/usr/sbin/nginx","-g","daemon off;"]

 ---> Running in 7085a3cb2ebf

Removing intermediate container 7085a3cb2ebf

 ---> 3932fc91e4bf

Step / : ENTRYPOINT ["/bin/entrypoint.sh"]

 ---> Running in 55a5f50907fc

Removing intermediate container 55a5f50907fc

 ---> dfe7de99a64d

Successfully built dfe7de99a64d

Successfully tagged wohaoshuaihttpd:v0.-

[root@localhost images3]# docker run --name wohaoshuai1 --rm -P  -e "PORT=8080"  wohaoshuaihttpd:v0.-

127.0.0.1 - - [/Apr/::: +] "GET / HTTP/1.1"   "-" "Wget" "-"

127.0.0.1 - - [/Apr/::: +] "GET / HTTP/1.1"   "-" "Wget" "-"

127.0.0.1 - - [/Apr/::: +] "GET / HTTP/1.1"   "-" "Wget" "-"

127.0.0.1 - - [/Apr/::: +] "GET / HTTP/1.1"   "-" "Wget" "-"

[root@localhost ~]# docker ps

CONTAINER ID        IMAGE                    COMMAND                  CREATED              STATUS                        PORTS                   NAMES

a1b6d0ddff14        wohaoshuaihttpd:v0.-   "/bin/entrypoint.sh …"   About a minute ago   Up About a minute (healthy)   0.0.0.0:->/tcp   wohaoshuai1

　　14、SHELL

　　15、STOPSIGNAL 修改指令信号

　　16、ARG

[root@localhost images3]# cat Dockerfile

FROM nginx:1.14-alpine

ARG author="wohaoshuai <wohaoshuai@qq.com>"

LABEL maintainer="${author}"

ENV NGX_DOC_ROOT="/data/web/html/"

ADD index.html ${NGX_DOC_ROOT}

ADD entrypoint.sh /bin/

EXPOSE /tcp

#3s后再做检测

HEALTHCHECK --start-period=3s CMD wget -O - -q http://${IP:-0.0.0.0}:10080/

CMD ["/usr/sbin/nginx","-g","daemon off;"]

ENTRYPOINT ["/bin/entrypoint.sh"]

[root@localhost images3]# docker build -t wohaoshuaihttpd:v0.- ./

Sending build context to Docker daemon  .096kB

Step / : FROM nginx:1.14-alpine

 ---> 8a2fb25a19f5

Step / : ARG author="wohaoshuai <wohaoshuai@qq.com>"

 ---> Running in d51a611199ab

Removing intermediate container d51a611199ab

 ---> f682ee70b312

Step / : LABEL maintainer="${author}"

 ---> Running in 461d279b754d

Removing intermediate container 461d279b754d

 ---> ca0c78ef37ae

Step / : ENV NGX_DOC_ROOT="/data/web/html/"

 ---> Running in ceb69b94032a

Removing intermediate container ceb69b94032a

 ---> f7e500f33f56

Step / : ADD index.html ${NGX_DOC_ROOT}

 ---> 52e9500d83ba

Step / : ADD entrypoint.sh /bin/

 ---> cd773aca3f27

Step / : EXPOSE /tcp

 ---> Running in 396a1631a659

Removing intermediate container 396a1631a659

 ---> 064b4c952023

Step / : HEALTHCHECK --start-period=3s CMD wget -O - -q http://${IP:-0.0.0.0}:10080/

 ---> Running in c2f2b809f64b

Removing intermediate container c2f2b809f64b

 ---> e9b24a5f543d

Step / : CMD ["/usr/sbin/nginx","-g","daemon off;"]

 ---> Running in 7f848401bdd3

Removing intermediate container 7f848401bdd3

 ---> 1b2caf95eddc

Step / : ENTRYPOINT ["/bin/entrypoint.sh"]

 ---> Running in 14b2ef23a35f

Removing intermediate container 14b2ef23a35f

 ---> 65fe43f7d081

Successfully built 65fe43f7d081

Successfully tagged wohaoshuaihttpd:v0.-

[root@localhost ~]# docker inspect -f {{.Config.Labels}} wohaoshuaihttpd:v0.-

map[maintainer:wohaoshuai <wohaoshuai@qq.com>]

　　　　构建时修改参数

[root@localhost images3]# docker build --build-arg author="Presley <Presley@qq.com>" -t wohaoshuaihttpd:v0.- ./

Sending build context to Docker daemon  .096kB

Step / : FROM nginx:1.14-alpine

 ---> 8a2fb25a19f5

Step / : ARG author="wohaoshuai <wohaoshuai@qq.com>"

 ---> Using cache

 ---> f682ee70b312

Step / : LABEL maintainer="${author}"

 ---> Running in c6ae8d2e646b

Removing intermediate container c6ae8d2e646b

 ---> 5c3eb8688fff

Step / : ENV NGX_DOC_ROOT="/data/web/html/"

 ---> Running in 700d76775398

Removing intermediate container 700d76775398

 ---> 1427d0079175

Step / : ADD index.html ${NGX_DOC_ROOT}

 ---> 987d3187f31f

Step / : ADD entrypoint.sh /bin/

 ---> 7bc12ca11c64

Step / : EXPOSE /tcp

 ---> Running in be86f52a488f

Removing intermediate container be86f52a488f

 ---> 16c8520ae136

Step / : HEALTHCHECK --start-period=3s CMD wget -O - -q http://${IP:-0.0.0.0}:10080/

 ---> Running in 133ee12ebd7c

Removing intermediate container 133ee12ebd7c

 ---> 0eac1d50b199

Step / : CMD ["/usr/sbin/nginx","-g","daemon off;"]

 ---> Running in 798fee85709b

Removing intermediate container 798fee85709b

 ---> 07ca978c450f

Step / : ENTRYPOINT ["/bin/entrypoint.sh"]

 ---> Running in b3d13eb6e049

Removing intermediate container b3d13eb6e049

 ---> 06e6e8b0b448

Successfully built 06e6e8b0b448

Successfully tagged wohaoshuaihttpd:v0.-

[root@localhost ~]# docker inspect -f {{.Config.Labels}} wohaoshuaihttpd:v0.-

map[maintainer:Presley <Presley@qq.com>]

　　17、ONBUILD

[root@localhost images3]# cat Dockerfile

FROM nginx:1.14-alpine

ARG author="wohaoshuai <wohaoshuai@qq.com>"

LABEL maintainer="${author}"

ENV NGX_DOC_ROOT="/data/web/html/"

ADD index.html ${NGX_DOC_ROOT}

ADD entrypoint.sh /bin/

EXPOSE /tcp

#3s后再做检测

HEALTHCHECK --start-period=3s CMD wget -O - -q http://${IP:-0.0.0.0}:10080/

#如果谁要基于我的镜像做那么需要先下载

ONBUILD ADD http://nginx.org/download/nginx-1.15.12.tar.gz /usr/local/src/

CMD ["/usr/sbin/nginx","-g","daemon off;"]

ENTRYPOINT ["/bin/entrypoint.sh"]

[root@localhost images3]# docker build --build-arg author="Presley <Presley@qq.com>" -t wohaoshuaihttpd:v0.- ./

Sending build context to Docker daemon  .096kB

Step / : FROM nginx:1.14-alpine

 ---> 8a2fb25a19f5

Step / : ARG author="wohaoshuai <wohaoshuai@qq.com>"

 ---> Using cache

 ---> f682ee70b312

Step / : LABEL maintainer="${author}"

 ---> Using cache

 ---> 5c3eb8688fff

Step / : ENV NGX_DOC_ROOT="/data/web/html/"

 ---> Using cache

 ---> 1427d0079175

Step / : ADD index.html ${NGX_DOC_ROOT}

 ---> Using cache

 ---> 987d3187f31f

Step / : ADD entrypoint.sh /bin/

 ---> Using cache

 ---> 7bc12ca11c64

Step / : EXPOSE /tcp

 ---> Using cache

 ---> 16c8520ae136

Step / : HEALTHCHECK --start-period=3s CMD wget -O - -q http://${IP:-0.0.0.0}:10080/

 ---> Using cache

 ---> 0eac1d50b199

Step / : ONBUILD ADD http://nginx.org/download/nginx-1.15.12.tar.gz /usr/local/src/

 ---> Running in e694a816039c

Removing intermediate container e694a816039c

 ---> 8ad18558dc97

Step / : CMD ["/usr/sbin/nginx","-g","daemon off;"]

 ---> Running in aabdddec1860

Removing intermediate container aabdddec1860

 ---> a9d1f912f8c9

Step / : ENTRYPOINT ["/bin/entrypoint.sh"]

 ---> Running in f7af8d4d2ef7

Removing intermediate container f7af8d4d2ef7

 ---> 41521f27c609

Successfully built 41521f27c609

Successfully tagged wohaoshuaihttpd:v0.-

[root@localhost images4]# cat Dockerfile

FROM wohaoshuaihttpd:v0.-

RUN mkdir /tmp/test

[root@localhost images4]# docker build -t test:v0.- ./

Sending build context to Docker daemon  .048kB

Step / : FROM wohaoshuaihttpd:v0.-

# Executing  build trigger

Downloading [==================================================>]  .032MB/.032MB

 ---> 5401af3f58d1

Step / : RUN mkdir /tmp/test

 ---> Running in 9fec094f32d3

Removing intermediate container 9fec094f32d3

 ---> 107f495f566e

Successfully built 107f495f566e

Successfully tagged test:v0.-

[root@localhost images4]# docker run --name test1 --rm test:v0.- ls /usr/local/src

nginx-1.15..tar.gz

Docker 学习8 Dockerfile详解2的更多相关文章

Docker 学习7 Dockerfile详解
一.镜像的生成途径 1.使用当前进程替换上一个进程 exec 2.生成方式 3.dockerfile制作镜像要求 a.要有专有的工作目录. b.要有专门的制作文件,文件名首字母大写 c.如果要打包很多 ...
Docker系列07—Dockerfile 详解
本文收录在容器技术学习系列文章总目录 1.认识Dockerfile 1.1 镜像的生成途径基于容器制作 dockerfile,docker build 基于容器制作镜像,已经在上篇Docker系列 ...
docker学习(3)--Dockfile详解
转载请注明出处:http://www.cnblogs.com/lighten/p/6900556.html 1.基本说明 Dockfile是一个用于编写docker镜像生成过程的文件,其有特定的语法. ...
Docker 学习之命令详解
1. docker version docker version 显示 Docker 版本信息. 2. docker info docker info 显示 Docker 系统信息,包括镜像和容器数. ...
Docker入门02——Dockerfile详解
基本示例 FROM MAINTAINER LABEL RUN ADD COPY CMD ENTRYPOINT ENV EXPOSE VOLUME WORKDIR USER ARG 基本示例 # Thi ...
[转帖]Docker学习之Dockerfile命令详解
Docker学习之Dockerfile命令详解 https://it.baiked.com/system/docker/2436.html 图挺好的前言之前,制作镜像的伪姿势搭建已经见过了,今天介 ...
Dockerfile详解
Dockerfile详解利用Dockerfile文件,可以构建docker的image镜像命令使用通过-f参数指定Dockerfile路径,进行构建image docker build -f / ...
Dockerfile详解及优化
Dockerfile详解 0. Dockerfile的作用 docker可以根据Dockerfile中的指令来构建docker镜像.Dockerfile是一个文本文件,其应当包含用户想要构建一个镜像的 ...
最佳实战Docker持续集成图文详解
最佳实战Docker持续集成图文详解这是一种真正的容器级的实现,这个带来的好处,不仅仅是效率的提升,更是一种变革:开发人员第一次真正为自己的代码负责——终于可以跳过运维和测试部门,自主维护运行环境( ...

随机推荐

postgresql某个字段值按照指定规则排序
select id,serial_group_id,state from ap_model order by serial_group_id asc, ( case when state=1 then ...
js重点--原型链继承详解
上篇说过了关于原型链继承的问题,这篇详解一下. 1. function animals(){ this.type = "animals"; } animals.prototype. ...
[算法竞赛入门经典]Message Decoding,ACM/ICPC World Finals 1991,UVa213
Description Some message encoding schemes require that an encoded message be sent in two parts. The ...
动态将ASPX生成HTML网页并将网页导出PDF
1.首先要找到wnvhtmlconvert.dll这个文件,并引入项目中. 2.Server.Execute("pos.aspx?id=" + ids); 执行相应的aspx网页 ...
浅入深出Vue：工具准备之PostMan安装配置及Mock服务配置
浅入深出Vue之工具准备(二):PostMan安装配置由于家中有事,文章没顾得上.在此说声抱歉,这是工具准备的最后一章. 接下来就是开始环境搭建了~尽情期待工欲善其事必先利其器,让我们先做好准备工 ...
有效使用django的queset
转载自https://www.oschina.net/translate/django-querysets 对象关系映射 (ORM) 使得与SQL数据库交互更为简单,不过也被认为效率不高,比原始的SQ ...
Stm32之通用定时器复习
因为毕业设计要用到PWM调光很久都没用到Stm32的定时器,有些内容已经遗忘,为了回顾复习相关内容今天开下通用定时器这一章节的数据手册. 1.时钟通用定时器一般是TIM2~TIM5,TIM1.TIM ...
从输入URL到浏览器显示页面发生了什么
1.输入网址当你开始输入网址比如www.cnblogs.com时游览器就可以在书签或者历史记录里面去搜索相关的网址推荐给你. 2.游览器查找域名的IP地址 ① 请求发起后,游览器首先会解析这个域名, ...
示波器X1探头和X10探头
示波器探头有X1和X10档,当测量一个信号时应该如何选择? 1.先我们看它们的区别? X1档,表示信号没有经过衰减进入示波器 X10档,表示信号衰减10倍进入示波器(当示波器也设置为X10档,直接读数 ...
linux 清空catalina.out日志不需要重启tomcat（五种方法）【转】
1.重定向方法清空文件 [root@localhost logs]# du -h catalina.out 查看文件大小17M catalina.out[root@localhost logs] ...

Docker 学习8 Dockerfile详解2

Docker 学习8 Dockerfile详解2的更多相关文章

随机推荐

热门专题