[Bug 1859656] Re: [2.6] Unable to reboot s390x KVM machine after initial deploy

[Sean Feole]

It would appear that this bug is once again causing problems with some of our 
automated testing.  
S390x KVM deployments are failing for Focal. When attempting to investigate a 
big I found that it is indeed this bug. 

Our MAAS Server is Version:

maas:
  Installed: 2.7.0-8232-g.6e1dba4ab-0ubuntu1~18.04.1
  Candidate: 2.7.0-8232-g.6e1dba4ab-0ubuntu1~18.04.1
  Version table:


I've attached the console log of the -KVM machine deploying.

On MAAS the rack controller reports the following:
sfeole@bsg75:~$ cat focal-s390x-maas.txt 
==> rackd.log <==
2020-04-09 14:14:59 provisioningserver.rackdservices.tftp: [info] boots390x.bin 
requested by 10.246.75.177
2020-04-09 14:14:59 provisioningserver.rackdservices.tftp: [info] 
s390x/65a9ca43-9541-49be-b315-e2ca85936ea2 requested by 10.246.75.177
2020-04-09 14:14:59 provisioningserver.rackdservices.tftp: [info] 
s390x/01-52-54-00-e5-d7-bb requested by 10.246.75.177

==> regiond.log <==
2020-04-09 14:14:59 maasserver.rpc.leases: [info] Lease update: commit for 
10.246.75.177 on 52:54:0:e5:d7:bb at 2020-04-09 14:14:59 (lease time: 600s)

==> rackd.log <==
2020-04-09 14:14:59 provisioningserver.rackdservices.tftp: [info] 
s390x/0AF64BB1 requested by 10.246.75.177
2020-04-09 14:14:59 provisioningserver.rackdservices.tftp: [info] s390x/0AF64BB 
requested by 10.246.75.177
2020-04-09 14:14:59 provisioningserver.rackdservices.tftp: [info] s390x/0AF64B 
requested by 10.246.75.177
2020-04-09 14:14:59 provisioningserver.rackdservices.tftp: [info] s390x/0AF64 
requested by 10.246.75.177
2020-04-09 14:14:59 provisioningserver.rackdservices.tftp: [info] s390x/0AF6 
requested by 10.246.75.177
2020-04-09 14:15:00 provisioningserver.rackdservices.tftp: [info] s390x/0AF 
requested by 10.246.75.177
2020-04-09 14:15:00 provisioningserver.rackdservices.tftp: [info] s390x/0A 
requested by 10.246.75.177
2020-04-09 14:15:00 provisioningserver.rackdservices.tftp: [info] s390x/0 
requested by 10.246.75.177
2020-04-09 14:15:00 provisioningserver.rackdservices.tftp: [info] s390x/default 
requested by 10.246.75.177


** Attachment added: "focal-s390x-deploy.txt"
   
https://bugs.launchpad.net/maas/+bug/1859656/+attachment/5350338/+files/focal-s390x-deploy.txt

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https://bugs.launchpad.net/bugs/1859656

Title:
  [2.6] Unable to reboot s390x KVM machine after initial deploy

Status in MAAS:
  Triaged
Status in QEMU:
  Incomplete
Status in Ubuntu on IBM z Systems:
  Triaged

Bug description:
  MAAS version: 2.6.1 (7832-g17912cdc9-0ubuntu1~18.04.1)
  Arch: S390x

  Appears that MAAS can not find the s390x bootloader to boot from the
  disk, not sure how maas determines this.  However this was working in
  the past. I had originally thought that if the maas machine was
  deployed then it defaulted to boot from disk.

  If I force the VM to book from disk, the VM starts up as expected.

  Reproduce:

  - Deploy Disco on S390x KVM instance
  - Reboot it

  on the KVM console...

  Connected to domain s2lp6g001
  Escape character is ^]
  done
    Using IPv4 address: 10.246.75.160
    Using TFTP server: 10.246.72.3
    Bootfile name: 'boots390x.bin'
    Receiving data:  0 KBytes
    TFTP error: file not found: boots390x.bin
  Trying pxelinux.cfg files...
    Receiving data:  0 KBytes
    Receiving data:  0 KBytes
  Failed to load OS from network

  ==> /var/log/maas/rackd.log <==
  2020-01-14 18:21:24 provisioningserver.rackdservices.tftp: [info] 
boots390x.bin requested by 10.246.75.160
  2020-01-14 18:21:24 provisioningserver.rackdservices.tftp: [info] 
s390x/65a9ca43-9541-49be-b315-e2ca85936ea2 requested by 10.246.75.160
  2020-01-14 18:21:24 provisioningserver.rackdservices.tftp: [info] 
s390x/01-52-54-00-e5-d7-bb requested by 10.246.75.160
  2020-01-14 18:21:24 provisioningserver.rackdservices.tftp: [info] 
s390x/0AF64BA0 requested by 10.246.75.160
  2020-01-14 18:21:24 provisioningserver.rackdservices.tftp: [info] 
s390x/0AF64BA requested by 10.246.75.160
  2020-01-14 18:21:24 provisioningserver.rackdservices.tftp: [info] 
s390x/0AF64B requested by 10.246.75.160
  2020-01-14 18:21:24 provisioningserver.rackdservices.tftp: [info] s390x/0AF64 
requested by 10.246.75.160
  2020-01-14 18:21:24 provisioningserver.rackdservices.tftp: [info] s390x/0AF6 
requested by 10.246.75.160
  2020-01-14 18:21:24 provisioningserver.rackdservices.tftp: [info] s390x/0AF 
requested by 10.246.75.160
  2020-01-14 18:21:24 provisioningserver.rackdservices.tftp: [info] s390x/0A 
requested by 10.246.75.160
  2020-01-14 18:21:24 provisioningserver.rackdservices.tftp: [info] s390x/0 
requested by 10.246.75.160
  2020-01-14 18:21:24 provisioningserver.rackdservices.tftp: [info] 
s390x/default requested by 10.246.75.160

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