发出RUN命令时Dockerfile错误

问题描述

我正在尝试学习Docker，并且我在CentOS8上使用Oracle VMware。我正在尝试构建一个Dockerfile。这是Dockerfile文件的内容：

FROM centos

RUN yum -y install httpd

构建时，它会引发以下错误：

[arijhit@localhost docker-images]$ docker build --tag centos_apache:v1 .

Sending build context to Docker daemon  2.048kB

Step 1/2 : FROM centos
 ---> 0d120b6ccaa8

Step 2/2 : RUN yum -y install httpd
 ---> Running in 1f20ba141039
CentOS-8 - AppStream                            0.0  B/s |   0  B     00:30    

Errors during downloading metadata for repository 'AppStream':
  - Curl error (6): Couldn't resolve host name for http://mirrorlist.centos.org/?release=8&arch=x86_64&repo=AppStream&infra=container [Could not resolve host: mirrorlist.centos.org]

Error: Failed to download metadata for repo 'AppStream': Cannot prepare internal mirrorlist: Curl error (6): Couldn't resolve host name for http://mirrorlist.centos.org/?release=8&arch=x86_64&repo=AppStream&infra=container [Could not resolve host: mirrorlist.centos.org]**

The command '/bin/sh -c yum -y install httpd' returned a non-zero code: 1

有人可以帮助纠正这一点吗？

编辑：

您好@Uberhumus，这是CentOS docker映像对您说的命令的响应

[arijhit@localhost ~]$ docker run -t -d centos 60566bb1a2ef808c59c0374c0e9753bc26f0098c8b54c438e7742af418beae3a

[arijhit@localhost ~]$ docker p
CONTAINER ID        IMAGE             COMMAND                  CREATED             STATUS              PORTS NAMES
60566bb1a2ef        centos              "/bin/bash"              20 seconds ago      Up 8 seconds                            laughing_greider
5d3efb03c67a        nginx:alpine        "/docker-entrypoint.…"   6 minutes ago       Up 5 minutes        80/tcp              kind_tesla

[arijhit@localhost ~]$ docker exec -it laughing_greider /bin/bash

[root@60566bb1a2ef /]# ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=115 time=31.4 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=115 time=168 ms
64 bytes from 8.8.8.8: icmp_seq=3 ttl=115 time=47.3 ms 
^C
--- 8.8.8.8 ping statistics ---
3 packets transmitted,3 received,0% packet loss,time 5ms 
rtt min/avg/max/mdev = 31.357/82.241/168.110/61.064 ms

[root@60566bb1a2ef /]# yum check-update
Failed to set locale,defaulting to C.UTF-8
CentOS-8 - AppStream 0.0  B/s |   0  B     00:30
Errors during downloading metadata for repository 'AppStream':
  - Curl error (6): Couldn't resolve host name for http://mirrorlist.centos.org/?release=8&arch=x86_64&repo=AppStream&infra=container [Could not resolve host: mirrorlist.centos.org] Error: Failed to download metadata for repo 'AppStream': Cannot prepare internal mirrorlist: Curl error (6): Couldn't resolve host name for http://mirrorlist.centos.org/?release=8&arch=x86_64&repo=AppStream&infra=container [Could not resolve host: mirrorlist.centos.org]

[root@60566bb1a2ef /]# yum -y install httpd
Failed to set locale,defaulting to C.UTF-8
CentOS-8 - AppStream 0.0  B/s |   0  B     00:30
Errors during downloading metadata for repository 'AppStream':
  - Curl error (6): Couldn't resolve host name for http://mirrorlist.centos.org/?release=8&arch=x86_64&repo=AppStream&infra=container [Could not resolve host: mirrorlist.centos.org] Error: Failed to download metadata for repo 'AppStream': Cannot prepare internal mirrorlist: Curl error (6): Couldn't resolve host name for http://mirrorlist.centos.org/?release=8&arch=x86_64&repo=AppStream&infra=container [Could not resolve host: mirrorlist.centos.org]

解决方法

亲爱的以下所有解决了我的问题。

firewall-cmd --permanent --zone=trusted --add-interface=docker0

firewall-cmd --reload

在这里找到它： https://forums.centos.org/viewtopic.php?f=54&t=74270

非常感谢这里的每个人...

,

我尝试构建您的Dockerfile，尽管有另一个错误，但我也遇到了错误。

以下分别是适用于CentOS 7和CentOS 8的Dockerfile：

FROM centos:7

RUN yum -y install httpd

EXPOSE 80

ENTRYPOINT [ "/usr/sbin/httpd" ]
CMD [ "-D","FOREGROUND"]

和

FROM centos:8

RUN yum clean all && \
    yum -y update && \
    yum -y install httpd

EXPOSE 80

ENTRYPOINT [ "/usr/sbin/httpd" ]
CMD [ "-D","FOREGROUND"]

让我知道其中任何一种对您都有用。

编辑：

如果需要，我会放入预制的图像here。

编辑2：

如果上述Dockerfile没有为您构建，则很可能是Docker的DNS问题。请按照this article中的步骤操作，以验证该假设并可能解决问题。