19-docker 容器Dockerfile文件

1.建立镜像文件夹，Dockerfile一定要这个名字，首位字母大写

[root@docker03 ~]# mkdir /opt/nginx
[root@docker03 ~]# cd /opt/nginx/
[root@docker03 nginx]# vim Dockerfile

 2.编辑Dockerfile文件

[root@docker03 nginx]# vim Dockerfile

# This is dockerfile or nignx

# VERSION 1
# Author：Hyman

# 基础镜像，镜像文件是centos
FROM centos

# 维护者信息
MAINTAINER sunmmi@qq.com

# 相关操作
RUN rpm -ivh https://mirrors.aliyun.com/epel/7/x86_64/Packages/e/epel-release-7-11.noarch.rpm
    && yum install nginx -y
    && echo 'Hello, Docker Page! ' > /usr/share/nginx/html/index.html

# 增加文件
#ADD index.html /usr/share/nginx/html/index.html

# 配置nginx参数
RUN echo "daemon off;" >> /etc/nginx/nginx.conf

# 设置开放端口
EXPOSE 80

# 执行命令
CMD ["nginx"]

 3.运行Dockerfile文件,根据dockerfile生成nginx镜像,-t就是tag标签的意思

[root@docker03 nginx]# docker build -t nginx:v3 /opt/nginx/
Sending build context to Docker daemon   2.56kB
Step 1/6 : FROM centos
 ---> 2d194b392dd1
Step 2/6 : MAINTAINER sunmmi@qq.com
 ---> Running in addedc6254a7
Removing intermediate container addedc6254a7
 ---> a8adc908bf98
Step 3/6 : RUN rpm -ivh https://mirrors.aliyun.com/epel/7/x86_64/Packages/e/epel-release-7-11.noarch.rpm     && yum install nginx -y     && echo '<h1>Hello, Docker Page! </h1>' > /usr/share/nginx/html/index.html
 ---> Running in a38c15b3cbfe
warning: /var/tmp/rpm-tmp.GjOUaX: Header V3 RSA/SHA256 Signature, key ID 352c64e5: NOKEY
Retrieving https://mirrors.aliyun.com/epel/7/x86_64/Packages/e/epel-release-7-11.noarch.rpm
Preparing...                          ########################################
Updating / installing...
epel-release-7-11                     ########################################
Loaded plugins: fastestmirror, ovl
Determining fastest mirrors
 * base: mirrors.aliyun.com
 * epel: mirrors.tongji.edu.cn
 * extras: mirrors.aliyun.com
 * updates: mirrors.aliyun.com
Resolving Dependencies
--> Running transaction check
---> Package nginx.x86_64 1:1.12.2-1.el7 will be installed
--> Processing Dependency: nginx-all-modules = 1:1.12.2-1.el7 for package: 1:nginx-1.12.2-1.el7.x86_64
--> Processing Dependency: nginx-filesystem = 1:1.12.2-1.el7 for package: 1:nginx-1.12.2-1.el7.x86_64
--> Processing Dependency: nginx-filesystem for package: 1:nginx-1.12.2-1.el7.x86_64
--> Processing Dependency: openssl for package: 1:nginx-1.12.2-1.el7.x86_64
--> Processing Dependency: libprofiler.so.0()(64bit) for package: 1:nginx-1.12.2-1.el7.x86_64
--> Running transaction check
.......
.......
perl-threads-shared.x86_64 0:1.43-6.el7                                       

Complete!
Removing intermediate container a38c15b3cbfe
 ---> c3ed6d22f75d
Step 4/6 : RUN echo "daemon off;" >> /etc/nginx/nginx.conf
 ---> Running in 4da76b9e7e9b
Removing intermediate container 4da76b9e7e9b
 ---> f63645ce4b69
Step 5/6 : EXPOSE 80
 ---> Running in 94e32cb0a7a3
Removing intermediate container 94e32cb0a7a3
 ---> 5b28bd15dcef
Step 6/6 : CMD ["nginx"]
 ---> Running in 6e83ea5c6feb
Removing intermediate container 6e83ea5c6feb
 ---> 4f3032128c0e
Successfully built 4f3032128c0e
Successfully tagged nginx:v3
[root@docker03 nginx]# 

 4.启动新的镜像

[root@docker03 nginx]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
nginx               v3                  4f3032128c0e        2 minutes ago       384MB
nginx               v2                  3372b9a7514a        About an hour ago   109MB
nginx               latest              7f70b30f2cc6        22 hours ago        109MB
node                latest              4885ab8871c2        24 hours ago        673MB
sunmmi/nginx        latest              1fd61459671b        2 days ago          385MB
centos              latest              2d194b392dd1        2 weeks ago         195MB
registry            latest              d1fd7d86a825        2 months ago        33.3MB
alpine              latest              3fd9065eaf02        2 months ago        4.14MB
hello-world         latest              f2a91732366c        4 months ago        1.85kB

# 启动刚才build的镜像，可以看到hello Docker Page文件
[root@docker03 nginx]# docker run -itd --name nginx03 -p 8080:80 nginx:v3
30d92fab23dae3db65ea034d093e2a3a38e872561f87257966b3fbb9137737a7
[root@docker03 nginx]# curl 192.168.1.26:8080
Hello, Docker Page!
[root@docker03 nginx]#