[Bug 1783056] [NEW] Ubuntu 18.04.1 network install fails via proxy server

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---Problem Description---
Ubuntu 18.04.1 network install fails via proxy server.
1> Server planned for install is on private network
2> the Peer server has INTERNET access and squid proxy server is created. 
3> During netinstall, the http proxy was given in the format <serverip>:<squid proxy>

attaching /var/log/syslog of the installer and /var/log/squid/access.log
of the server.

 
---uname output---
4.15.0-20-generic, http://ports.ubuntu.com/dists/bionic/main/installer-ppc64el/20101020ubuntu543/images/netboot/ubuntu-installer/ppc64el/vmlinux
 
Machine Type = AC922 
 
Contact Information = naveedaus at In.ibm.com, praveen.pandey at in.ibm.com 
 
---boot type---
Network boot
 
---bootloader---
kexec
 
---Kernel cmdline used to launch install---
kexec -l vmlinux -i initrd.gz
 
---Bootloader protocol---
http
 
---Install repository type---
Internet repository
 
---Install repository Location---
us.ports.ubuntu.com
 
---Point of failure---
Other failure during installation (stage 1)

== Comment: #1 - NAVEED A. UPPINANGADY SALIH <naveedaus at in.ibm.com> - 2018-07-11 06:42:27 ==
Please note this scenario was never tested in current / previous Ubuntu installations by test team.. may be we need Canonical's expertise here and see what configs are meant to be set in the installer / squid server.. Hence we can not consider this issue reported as regression. 

== Comment: #4 - Vaishnavi Bhat <vaish123 at in.ibm.com> - 2018-07-13 09:10:55 ==
Hi Naveed, 

>From the install logs, INFO: Menu item 'download-installer' selected -->
I see that the packages are downloaded directly from the URL and do not
use proxy server to download installer. That is why we see all the .udeb
packages getting downloaded successfully.

Jul 11 06:42:56 main-menu[1614]: (process:2737): 2018-07-11 06:42:56 URL:http://us.ports.ubuntu.com/ubuntu-ports/dists/bionic/Release [241180/241180] -> "-" [1]
Jul 11 06:42:56 main-menu[1614]: (process:2737): 2018-07-11 06:42:56 URL:http://us.ports.ubuntu.com/ubuntu-ports//dists/bionic/main/binary-ppc64el/Release [98/98] -> "-" [1]
Jul 11 06:42:56 main-menu[1614]: INFO: Menu item 'download-installer' selected
Jul 11 06:42:56 anna[2785]: 2018-07-11 06:42:56 URL:http://us.ports.ubuntu.com/ubuntu-ports//dists/bionic/Release [241180/241180] -> "/tmp/_fetch-url_net-retriever-2797-Release.2800" [1]
Jul 11 06:42:56 anna[2785]: 2018-07-11 06:42:56 URL:http://us.ports.ubuntu.com/ubuntu-ports//dists/bionic

But once the base-installer comes up, the proxy is trying to be used. Hence the failures in downlaoding the linux-* files. I can see this to be a configuration issue where the format in which the proxy was mentioned is not right.
Jul 11 07:14:41 base-installer: Ign:1 http://ports.ubuntu.com/ubuntu-ports bionic-security InRelease
Jul 11 07:14:41 base-installer: Ign:2 http://us.ports.ubuntu.com/ubuntu-ports bionic InRelease
Jul 11 07:14:41 base-installer: Ign:3 http://us.ports.ubuntu.com/ubuntu-ports bionic-updates InRelease
Jul 11 07:14:41 base-installer: Err:4 http://ports.ubuntu.com/ubuntu-ports bionic-security Release
Jul 11 07:14:41 base-installer:   Unsupported proxy configured: 10.10.10.3://3128
Jul 11 07:14:41 base-installer: Err:5 http://us.ports.ubuntu.com/ubuntu-ports bionic Release
Jul 11 07:14:41 base-installer:   Unsupported proxy configured: 10.10.10.3://3128
Jul 11 07:14:41 base-installer: Err:6 http://us.ports.ubuntu.com/ubuntu-ports bionic-updates Release
Jul 11 07:14:41 base-installer:   Unsupported proxy configured: 10.10.10.3://3128
Jul 11 07:14:41 base-installer: Reading package lists...

Mirroring the bug to distro for their inputs.

** Affects: debian-installer (Ubuntu)
     Importance: Undecided
     Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage)
         Status: New


** Tags: architecture-ppc64le bugnameltc-169677 severity-critical targetmilestone-inin1804
-- 
Ubuntu 18.04.1 network install fails via proxy server
https://bugs.launchpad.net/bugs/1783056
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