[Bug 1924794] Re: Getting error "ipconfig: no devices to configure" while trying to autoinstall in a VLAN env on s390x

[Frank Heimes]

Summary of autoinstall w/ vlan tests:

*** 20.04.1:
I see these messages, but the device gets finally configured:
"chzdev: Unknown device type or device ID format: c000.2653"
"Use 'chzdev --help' for more information"
"QETH device 0.0.c000:0.0.c001:0.0.c002 configured"
"IP-Config: encc000.2653 hardware address d6:21:7e:b3:49:da mtu 1500"
"IP-Config: encc000.2653 guessed broadcast address 10.245.236.255"
"IP-Config: encc000.2653 complete:"
(there seems to be a second try to get the configured after the iso was downloaded, but that doesn't seem to harm:
"chzdev: Unknown device type or device ID format: c000.2653"
"Use 'chzdev --help' for more information"
"QETH device 0.0.c000:0.0.c001:0.0.c002 already configured" )
No further error visible.

*** 20.04.2:
Similar to 20.04.1
but I get later msgs like this:
"finish:   subiquity/ErrorReporter/1619073531.572634459.unknown/add_info: written"
"to /var/crash/1619073531.572634459.unknown.crash"
probably LP#1924575

*** 20.10 (and later):
The device cannot be configured anymore:
"(initramfs) [6n"
"ip: SIOCGIFFLAGS: No such device"
"ip: can't find device 'encc000'"
"ipconfig: encc000.2653: SIOCGIFINDEX: No such device"
"ipconfig: no devices to configure"
"ipconfig: encc000.2653: SIOCGIFINDEX: No such device"
"ipconfig: no devices to configure"
"ipconfig: encc000.2653: SIOCGIFINDEX: No such device"
"ipconfig: no devices to configure"
"ipconfig: encc000.2653: SIOCGIFINDEX: No such device"
"ipconfig: no devices to configure"
"ipconfig: encc000.2653: SIOCGIFINDEX: No such device"
"ipconfig: no devices to configure"
"ipconfig: encc000.2653: SIOCGIFINDEX: No such device"
"ipconfig: no devices to configure"
"ipconfig: encc000.2653: SIOCGIFINDEX: No such device"
"ipconfig: no devices to configure"
"ipconfig: encc000.2653: SIOCGIFINDEX: No such device"
"ipconfig: no devices to configure"
"ipconfig: encc000.2653: SIOCGIFINDEX: No such device"
"ipconfig: no devices to configure"
"ipconfig: encc000.2653: SIOCGIFINDEX: No such device"
"ipconfig: no devices to configure"
"no search or nameservers found in /run/net-encc000.2653.conf /run/net-*.conf /ru"
n/net6-*.conf

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https://bugs.launchpad.net/bugs/1924794

Title:
  Getting error "ipconfig: no devices to configure" while trying to
  autoinstall in a VLAN env on s390x

Status in initramfs-tools:
  New
Status in subiquity:
  New
Status in Ubuntu on IBM z Systems:
  New
Status in casper package in Ubuntu:
  New

Bug description:
  Trying to autoinstall on a LPAR (that is connected to a VLAN
  environment) and using the 21.04 image from today (time stamp April
  16th) fails and to boot ends up with the following error message:

  
  BusyBox v1.30.1 (Ubuntu 1:1.30.1-6ubuntu2) built-in shell (ash)
  Enter 'help' for a list of built-in commands.
   
  (initramfs) [6n
  ip: SIOCGIFFLAGS: No such device
  ip: can't find device 'encc000'
  ipconfig: encc000.2653: SIOCGIFINDEX: No such device
  ipconfig: no devices to configure
  ipconfig: encc000.2653: SIOCGIFINDEX: No such device
  ipconfig: no devices to configure
  ipconfig: encc000.2653: SIOCGIFINDEX: No such device
  ipconfig: no devices to configure
  ipconfig: encc000.2653: SIOCGIFINDEX: No such device
  ipconfig: no devices to configure
  ipconfig: encc000.2653: SIOCGIFINDEX: No such device
  ipconfig: no devices to configure
  ipconfig: encc000.2653: SIOCGIFINDEX: No such device
  ipconfig: no devices to configure
  ipconfig: encc000.2653: SIOCGIFINDEX: No such device
  ipconfig: no devices to configure
  ipconfig: encc000.2653: SIOCGIFINDEX: No such device
  ipconfig: no devices to configure
  ipconfig: encc000.2653: SIOCGIFINDEX: No such device
  ipconfig: no devices to configure
  ipconfig: encc000.2653: SIOCGIFINDEX: No such device
  ipconfig: no devices to configure
  no search or nameservers found in /run/net-encc000.2653.conf /run/net-*.conf /ru
  n/net6-*.conf
  Connecting to installserver:80 (installserver:80)
  wget: can't connect to remote host (installserver): Network is unreachable
  Unable to find a live file system on the network

  So the network device encc000 and it related encc000.2653 is not
  automatically activated/enabled like it was in the past.

  It worked in the past with the same config I used today 
  ip=10.245.236.14::10.245.236.1:255.255.255.0:hostname:encc000.2653:none:10.245.236.1 vlan=encc000.2653:encc000 url=http://installserver:80/ubuntu-live-server-21.04/hirsute-live-server-s390x.iso autoinstall ds=nocloud-net;s=http://installserver:80/autoinstall/hostname/ --- quiet

  With "worked in the past" I mean it's already a while ago when I tried
  it last time - right now it does not seem to work with 21.04 and
  20.04.2 - BUT only on this particular environment where I have to
  specify the VLAN as kernel arg ("parm-file").

  It works in a different non VLAN environments (for example in a z/VM
  guest environment where I do NOT have to specify the VLAN at the
  autoistall config, since the VLAN is handled there by the z/VM
  vSwitch).

  Doing an interactive installation on this particular LPAR (incl.
  specifying the VLAN id) works fine!

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