1.在线安装Nginx

# 安装Nginx
yum install epel-release
yum install nginx

2.配置开机启动

# 启动Nginx
systemctl start nginx
# 开机自启
systemctl enable nginx

一般docker内的centos7安装Nginx的目录结构是：

/etc/nginx为配置文件路径
/usr/sbin/nginx为nginx启动脚本路径，你可能会用到/usr/sbin/nginx -s reload