Dockerfile构建案例-526互联

# 1.构建上下文和所需的文件
[root@localhost ~]# mkdir dockerfile-test
[root@localhost ~]# cd dockerfile-test/
[root@localhost dockerfile-test]# touch nginx.repo
[root@localhost dockerfile-test]# touch Dockerfile
# 2.编辑Dockerfile
[root@localhost dockerfile-test]# cat Dockerfile 
FROM centos
LABEL maintainer='xjt'
RUN rm -rf /etc/yum.repos.d/*
COPY ./nginx.repo /etc/yum.repos.d
RUN yum makecache
RUN yum install -y nginx
EXPOSE 80
CMD ["nginx", "-g", "daemon off;"]

[root@localhost dockerfile-test]# cat nginx.repo 
[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/centos/$releasever/$basearch/
gpgcheck=0
enabled=1

# 4.镜像构建时网络问题处理（非必须）
# 报错：WARNING: IPv4 forwarding is disabled. Networking will not work.
解决办法：
vi /etc/sysctl.conf
net.ipv4.ip_forward=1         #添加这段代码
# 重启network服务
systemctl restart network
# 查看是否修改成功 （备注：返回1，就是成功）
[root@studyCMachine aaaaaaa]# sysctl net.ipv4.ip_forward
net.ipv4.ip_forward = 1

# 5.构建镜像
[root@localhost dockerfile-test]# docker build -t centos-nginx-xjt:1.0 .

# 6.启动容器
[root@localhost dockerfile-test]# docker run  -d -p 8000:80 --name my-nginx centos-nginx-hqs:1.0
e5be77c444922817b69acc15810d186634765d27ec0d8ea8e7b345acffc610fa

# 7.访问验证 curl
[root@localhost dockerfile-test]# curl 127.0.0.1:8000

Dockerfile