为什么在运行从19.10到20.04LTS配置的squid-deb代理客户端时，我获得了“身份验证失败”？

Question

我正在本地网络中运行squid-deb-proxy服务器。在运行所有APT命令时，它可以很好地处理所有包下载。它被配置为所有可能已知的镜像URL，包括旧版本。Ubuntu19.10客户端已经安装了客户端-- squid-deb-proxy-client包。

$ dpkg -l squid-deb-proxy-client | tail -n1
ii  squid-deb-proxy-client 0.8.14+nmu2  all          automatic proxy discovery for APT based on Avahi

$ sudo apt update 
Hit:1 http://archive.ubuntu.com/ubuntu eoan InRelease
Hit:2 http://archive.ubuntu.com/ubuntu eoan-updates InRelease
Hit:3 http://archive.ubuntu.com/ubuntu eoan-backports InRelease
Hit:4 http://security.ubuntu.com/ubuntu eoan-security InRelease
Reading package lists... Done
Building dependency tree       
Reading state information... Done
All packages are up to date.

但是，当我尝试启动升级进程以获得20.04LTS-在终端中使用sudo do-release-upgrade时，我得到了以下错误消息：

$ sudo do-release-upgrade 
Checking for a new Ubuntu release
Your Ubuntu release is not supported anymore.
For upgrade information, please visit:
http://www.ubuntu.com/releaseendoflife

Get:1 Upgrade tool signature [1 554 B]                                                                                                              
Get:2 Upgrade tool [1 342 kB]                                                                                                                       
Fetched 1 343 kB in 0s (0 B/s)                                                                                                                      
authenticate 'focal.tar.gz' against 'focal.tar.gz.gpg' 
Authentication failed
Authenticating the upgrade failed. There may be a problem with the network or with the server. 

在squid-deb-proxy服务器端的日志中，我没有看到任何特殊的内容：

==> /var/log/squid-deb-proxy/access.log <==
1595069772.862    212 192.168.3.47 TCP_MISS/200 3349 CONNECT changelogs.ubuntu.com:443 - HIER_DIRECT/91.189.95.15 -
1595069774.726      2 192.168.3.47 TCP_MEM_HIT/200 1950 GET http://archive.ubuntu.com/ubuntu/dists/focal-updates/main/dist-upgrader-all/current/focal.tar.gz.gpg - HIER_NONE/- application/x-gzip
1595069775.410    681 192.168.3.47 TCP_HIT/200 1342082 GET http://archive.ubuntu.com/ubuntu/dists/focal-updates/main/dist-upgrader-all/current/focal.tar.gz - HIER_NONE/- application/x-gzip

如何解决身份验证无法正常通过代理服务器运行升级的问题？我不希望关闭代理服务器(或将其配置从客户端中排除)关闭，以解决问题。

备注：

1. 对于可能的亲密选民:当我尝试用sudo do-release-upgrade -d将18.04LTS升级到20.04LTS时，也会发生同样的情况。
2. 我已经把bug 1888058报告给发射台了。
3. 删除squid-deb-proxy-client deb包并由Acquire::http::Proxy "http://192.168.12.34:8000";在/etc/apt/apt.conf中指定代理不会改变任何事情。

Answer 1

这里的问题是由于我的代理有旧版本的安装程序文件造成的。

因此，我通过通过客户机上的命令触发手动缓存更新来解决这个问题：

cd /tmp
http_proxy=http://192.168.12.34:8000 wget --no-cache -c http://archive.ubuntu.com/ubuntu/dists/focal-updates/main/dist-upgrader-all/current/focal.tar.gz
http_proxy=http://192.168.12.34:8000 wget -c http://archive.ubuntu.com/ubuntu/dists/focal-updates/main/dist-upgrader-all/current/focal.tar.gz

在服务器上：

sudo service squid3 restart
sudo service squid-deb-proxy restart

然后升级运行良好。

Answer 2

这个问题与您的squid代理无关。它无法将下载的文件“focal.tar.gz”与文件“ocal.tar.gz.gpg”中的GPG键匹配。

这个问题是在：https://stackoverflow.com/a/62463184/1525392中解决的

其中，正如Hiren所建议的，您必须用下面的

/etc/apt/sources.list

但是在替换之前一定要备份这个文件。

deb http://in.archive.ubuntu.com/ubuntu/ focal main restricted universe multiverse
deb-src http://in.archive.ubuntu.com/ubuntu/ focal main restricted universe multiverse

deb http://in.archive.ubuntu.com/ubuntu/ focal-updates main restricted universe multiverse
deb-src http://in.archive.ubuntu.com/ubuntu/ focal-updates main restricted universe multiverse

deb http://in.archive.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse
deb-src http://in.archive.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse

deb http://in.archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse
deb-src http://in.archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse

deb http://archive.canonical.com/ubuntu focal partner
deb-src http://archive.canonical.com/ubuntu focal partner

然后,

sudo apt-get install --reinstall ubuntu-keyring