docker运行Ubuntu:latest容器，无法连接网络，apt-get报错

一、状态

自己制作的arm架构的Ubuntu18系统，docker版本是18.06.03，拉取最新的Ubuntu镜像，在镜像内使用apt-get update命令出现如下错误：

root@73387d64899b:/# apt-get update
Err:1 http://deb.debian.org/debian buster InRelease
  Could not resolve 'deb.debian.org'
Err:2 http://security.debian.org/debian-security buster/updates InRelease
  Could not resolve 'security.debian.org'
Err:3 http://deb.debian.org/debian buster-updates InRelease
  Could not resolve 'deb.debian.org'
Reading package lists... Done
W: Failed to fetch http://deb.debian.org/debian/dists/buster/InRelease  Could not resolve 'deb.debian.org'
W: Failed to fetch http://security.debian.org/debian-security/dists/buster/updates/InRelease  Could not resolve 'security.debian.org'
W: Failed to fetch http://deb.debian.org/debian/dists/buster-updates/InRelease  Could not resolve 'deb.debian.org'
W: Some index files failed to download. They have been ignored, or old ones used instead.

二、解决

1. 更改hosts文件，将静态ip添加进文件

root@73387d64899b:/# cat /etc/hosts
127.0.0.1       localhost
::1     localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
172.17.0.2      73387d64899b

151.101.128.204         deb.debian.org
151.101.78.133          security.debian.org

出现如下结果，还是有错误。

root@73387d64899b:/# apt-get update
Ign:1 http://deb.debian.org/debian buster InRelease
Ign:2 http://security.debian.org/debian-security buster/updates InRelease
Ign:3 http://deb.debian.org/debian buster-updates InRelease
Err:4 http://security.debian.org/debian-security buster/updates Release
  Could not create a socket for 151.101.78.133 (f=2 t=1 p=6) - socket (13: Permission denied)
Err:5 http://deb.debian.org/debian buster Release  
  Could not create a socket for 151.101.128.204 (f=2 t=1 p=6) - socket (13: Permission denied)
Err:6 http://deb.debian.org/debian buster-updates Release
  Could not create a socket for 151.101.128.204 (f=2 t=1 p=6) - socket (13: Permission denied)
Reading package lists... Done
E: The repository 'http://security.debian.org/debian-security buster/updates Release' no longer has a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://deb.debian.org/debian buster Release' no longer has a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://deb.debian.org/debian buster-updates Release' no longer has a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

2. 更改/etc/passwd文件，将如下语句的gid：65534改为3003，解决问题

_apt:x:100:65534::/nonexistent:/usr/sbin/nologin
#改为：
_apt:x:100:3003::/nonexistent:/usr/sbin/nologin