Description of problem:
Configuring a Debian system to talk to Spacewalk via proxy server fails to download packages. 

Version-Release number of selected component (if applicable):
2.2


How reproducible:
Configure Ubuntu client to talk to RHN via proxy server. 


Steps to Reproduce:
1.  Install Spacewalk
2.  Install Spacewalk Proxy
3.  Configure Ubuntu client to talk via Spacewalk Proxy.
3a.  Use the following packages for your Ubuntu clients:   https://launchpad.net/~mj-casalogic/+archive/ubuntu/spacewalk-ubuntu

Actual results:
root@repo-agent04:/usr/lib/apt/methods# apt-get install bash
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Suggested packages:
  bash-doc
The following packages will be upgraded:
  bash
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 641 kB of archives.
After this operation, 8,192 B disk space will be freed.
WARNING: The following packages cannot be authenticated!
  bash
Install these packages without verification [y/N]? y
Err spacewalk://<deleted>/ channels:/channel_default_ubuntu1204lts_x8664_security bash amd64 4.2-2ubuntu2.3
  404  Not Found
Failed to fetch spacewalk://<deleted>/XMLRPC/GET-REQ/channel_default_ubuntu1204lts_x8664_security/getPackage/bash-4.2-2ubuntu2.3.amd64-deb.deb  404  Not Found
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?


Expected results:
Package installation to succeed. 
Installation will succeed if the client is pointed directly at the Spacewalk server.


Additional info:

Turning on debugging in the broker log shows: 

2014/10/28 13:49:57 -04:00 3134 1.2.3.4: broker/rhnBroker.__callLocalRepository('GET-REQ', 'channel_default_ubuntu1204lts_x8664_security', 'getPackage', ['bash-4.2-2ubuntu2.3.amd64-deb.deb'])
2014/10/28 13:49:57 -04:00 3134 1.2.3.4: broker/rhnRepository.__init__('channel_default_ubuntu1204lts_x8664_security',)
2014/10/28 13:49:57 -04:00 3134 1.2.3.4: common/rhnRepository.__init__('channel_default_ubuntu1204lts_x8664_security',)
2014/10/28 13:49:57 -04:00 3134 1.2.3.4: broker/rhnBroker.__callLocalRepository("Calling getPackage(['bash-4.2-2ubuntu2.3.amd64-deb.deb'])",)
2014/10/28 13:49:57 -04:00 3134 1.2.3.4: common/rhnRepository.getPackage('bash-4.2-2ubuntu2.3.amd64-deb.deb',)
2014/10/28 13:49:57 -04:00 3134 1.2.3.4: broker/rhnRepository.getPackagePath('bash-4.2-2ubuntu2.3.amd64-deb.deb',)
2014/10/28 13:49:57 -04:00 3134 1.2.3.4: broker/rhnRepository._cacheObj('package_mapping:channel_default_ubuntu1204lts_x8664_security:', '20141021111613', ())
2014/10/28 13:49:57 -04:00 3134 1.2.3.4: broker/rhnRepository._getPkgListDir('/var/spool/rhn-proxy/list',)
2014/10/28 13:49:57 -04:00 3134 1.2.3.4: broker/rhnRepository.getPackagePath('ERROR', 'Package not in mapping: bash-4.2-2ubuntu2.3.amd64-deb.deb')
2014/10/28 13:49:57 -04:00 3134 1.2.3.4: proxy/apacheHandler.response('Response type', <class 'spacewalk.common.rhnException.rhnFault'>)
2014/10/28 13:49:57 -04:00 3134 1.2.3.4: common/rhnApache.logHandler
2014/10/28 13:49:57 -04:00 3134 1.2.3.4: proxy/apacheHandler.cleanupHandler
2014/10/28 13:49:57 -04:00 3134 1.2.3.4: common/rhnApache.cleanupHandler
2014/10/28 13:49:57 -04:00 3134 1.2.3.4: common/rhnApache.timer('Request served in 0.03 sec',)

Examining the package cache file: /var/spool/rhn-proxy/list/package_mapping:channel_default_ubuntu1204lts_x8664_security:-20141021111613  (via strings) 

[root@spacewalk-proxy01 list]# strings *ubuntu*
(U!bash-4.2-2ubuntu2.3.amd64-deb.rpmq
(Uhrhn/6ec/bash/4.2-2ubuntu2.3/amd64-deb/6ecda87f241b2aa325a7a6db6925af01/bash-4.2-2ubuntu2.3.amd64-deb.rpmq
UCrhn/bash/4.2-2ubuntu2.3/amd64-deb/bash-4.2-2ubuntu2.3.amd64-deb.rpmq
eU*bash-builtins-4.2-2ubuntu2.3.amd64-deb.rpmq
(Uzrhn/b2f/bash-builtins/4.2-2ubuntu2.3/amd64-deb/b2f6077dc75cf8f33fdf9353a2050a5e/bash-builtins-4.2-2ubuntu2.3.amd64-deb.rpmq
UUrhn/bash-builtins/4.2-2ubuntu2.3/amd64-deb/bash-builtins-4.2-2ubuntu2.3.amd64-deb.rpmq	eU(bash-static-4.2-2ubuntu2.3.amd64-deb.rpmq
(Uvrhn/fda/bash-static/4.2-2ubuntu2.3/amd64-deb/fda214b733937ad03285f6c780f5a0d7/bash-static-4.2-2ubuntu2.3.amd64-deb.rpmq
UQrhn/bash-static/4.2-2ubuntu2.3/amd64-deb/bash-static-4.2-2ubuntu2.3.amd64-deb.rpmq
eU!bash-4.2-2ubuntu2.1.amd64-deb.rpmq
(Uhrhn/e5d/bash/4.2-2ubuntu2.1/amd64-deb/e5d12ea045b762e6c62824acacc70e93/bash-4.2-2ubuntu2.1.amd64-deb.rpmq
UCrhn/bash/4.2-2ubuntu2.1/amd64-deb/bash-4.2-2ubuntu2.1.amd64-deb.rpmq

(Note all the "-deb.rpm" named files.) 

Further examination of the rhnRepository.py source code:   https://github.com/spacewalkproject/spacewalk/blob/master/proxy/proxy/broker/rhnRepository.py

Shows such code as:   (Line 234) 

            extension = "rpm"
            if isSolarisArch(arch):
                extension = "pkg"

There are other examples. 

So, if its not a Solaris package, it has to be a RPM?     

I know Ubuntu is the OS of choice for lemonade stand vendors, but unfortunately due to reasons beyond my control, we're stuck with it, and would prefer a centrally managed Spacewalk infrastructure using proxies, instead of standalone servers.