kvm: add SCSI controllers based on the number of virtio-SCSI disks

[weizhouapache]

Description

This PR fixes #7490

According to libvirt code, the units per scsi controller is set to 7
therefore, we need to create scsi controller every 7 disks (including CDROM).

https://github.com/libvirt/libvirt/blob/50cc7a0d9d2b9df085ec073a6d60820a9642158a/src/conf/domain_conf.h#L3007-L3008

https://github.com/libvirt/libvirt/blob/50cc7a0d9d2b9df085ec073a6d60820a9642158a/src/conf/domain_conf.c#L6701-L6704

Steps to reproduce the issue

• register a template or update template guest os type to "Other PV (VirtIO SCSI)"
• create vm
• attach 6 disks. check vm xml dump, it looks good

    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2' cache='none' discard='unmap'/>
      <source file='/mnt/3bdc199b-d6f8-3a19-a139-3b0ae09379d5/e613dd6e-e0df-41ba-bf24-75bc0c5d4771' index='8'/>
      <backingStore/>
      <target dev='sdg' bus='scsi'/>
      <serial>e613dd6ee0df41babf24</serial>
      <alias name='scsi0-0-0-6'/>
      <address type='drive' controller='0' bus='0' target='0' unit='6'/>
    </disk>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2' cache='none' discard='unmap'/>
      <source file='/mnt/c8c866fd-5553-3dc7-99a2-6df2a6ff516e/6d21d6ec-7f0f-4acb-abe4-ae4da1f1e83e' index='9'/>
      <backingStore/>
      <target dev='sdh' bus='scsi'/>
      <serial>6d21d6ec7f0f4acbabe4</serial>
      <alias name='scsi1-0-0-0'/>
      <address type='drive' controller='1' bus='0' target='0' unit='0'/>
    </disk>
...
    <controller type='scsi' index='0' model='virtio-scsi'>
      <driver queues='1'/>
      <alias name='scsi0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/>
    </controller>
    <controller type='scsi' index='1' model='virtio-scsi'>
      <alias name='scsi1'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
    </controller>

• stop and start the vm

Prior to this PR, a scsi controller with model lsilogic is created automatically

    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2' cache='none' discard='unmap'/>
      <source file='/mnt/c8c866fd-5553-3dc7-99a2-6df2a6ff516e/6d21d6ec-7f0f-4acb-abe4-ae4da1f1e83e' index='2'/>
      <backingStore/>
      <target dev='sdh' bus='scsi'/>
      <serial>6d21d6ec7f0f4acbabe4</serial>
      <alias name='scsi1-0-0'/>
      <address type='drive' controller='1' bus='0' target='0' unit='0'/>
    </disk>
...
    <controller type='scsi' index='0' model='virtio-scsi'>
      <driver queues='1'/>
      <alias name='scsi0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/>
    </controller>
...
    <controller type='scsi' index='1' model='lsilogic'>
      <alias name='scsi1'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
    </controller>

With this PR, a scsi controller with model virtio-scsi is created automatically

    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2' cache='none' discard='unmap'/>
      <source file='/mnt/c8c866fd-5553-3dc7-99a2-6df2a6ff516e/6d21d6ec-7f0f-4acb-abe4-ae4da1f1e83e' index='2'/>
      <backingStore/>
      <target dev='sdh' bus='scsi'/>
      <serial>6d21d6ec7f0f4acbabe4</serial>
      <alias name='scsi1-0-0-0'/>
      <address type='drive' controller='1' bus='0' target='0' unit='0'/>
    </disk>
......
    <controller type='scsi' index='0' model='virtio-scsi'>
      <driver queues='1'/>
      <alias name='scsi0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/>
    </controller>
    <controller type='scsi' index='1' model='virtio-scsi'>
      <driver queues='1'/>
      <alias name='scsi1'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x0a' function='0x0'/>
    </controller>

Types of changes

• Breaking change (fix or feature that would cause existing functionality to change)
• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Enhancement (improves an existing feature and functionality)
• Cleanup (Code refactoring and cleanup, that may add test cases)
• build/CI
• test (unit or integration test code)

Feature/Enhancement Scale or Bug Severity

Feature/Enhancement Scale

• Major
• Minor

Bug Severity

• BLOCKER
• Critical
• Major
• Minor
• Trivial

Screenshots (if appropriate):

How Has This Been Tested?

How did you try to break this feature and the system with this change?

[weizhouapache]

@blueorangutan package

[blueorangutan]

@weizhouapache a [SL] Jenkins job has been kicked to build packages. It will be bundled with KVM, XenServer and VMware SystemVM templates. I'll keep you posted as I make progress.

[codecov]

Codecov Report

Attention: Patch coverage is 90.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 12.27%. Comparing base (1af4158) to head (89eb4eb).
Report is 2 commits behind head on 4.18.

Files with missing lines	Patch %	Lines
...ervisor/kvm/resource/LibvirtComputingResource.java	90.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##               4.18    #9823     +/-   ##
===========================================
  Coverage     12.27%   12.27%             
- Complexity     9335     9339      +4     
===========================================
  Files          4699     4699             
  Lines        414691   414698      +7     
  Branches      53409    50767   -2642     
===========================================
+ Hits          50891    50903     +12     
+ Misses       357475   357468      -7     
- Partials       6325     6327      +2     

Flag	Coverage Δ
unittests	12.27% <90.00%> (+<0.01%)	⬆️

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[blueorangutan]

Packaging result [SF]: ✔️ el8 ✔️ el9 ✔️ debian ✔️ suse15. SL-JID 11381

[weizhouapache]

@blueorangutan test

[blueorangutan]

@weizhouapache a [SL] Trillian-Jenkins test job (ol8 mgmt + kvm-ol8) has been kicked to run smoke tests

[blueorangutan]

[SF] Trillian test result (tid-11684)
Environment: kvm-ol8 (x2), Advanced Networking with Mgmt server ol8
Total time taken: 46725 seconds
Marvin logs: https://github.com/blueorangutan/acs-prs/releases/download/trillian/pr9823-t11684-kvm-ol8.zip
Smoke tests completed. 110 look OK, 1 have errors, 0 did not run
Only failed and skipped tests results shown below:

Test	Result	Time (s)	Test File
ContextSuite context=TestISOUsage>:setup	Error	0.00	test_usage.py

[DaanHoogland]

clgtm

[weizhouapache]

@blueorangutan package

[blueorangutan]

@weizhouapache a [SL] Jenkins job has been kicked to build packages. It will be bundled with KVM, XenServer and VMware SystemVM templates. I'll keep you posted as I make progress.

[blueorangutan]

Packaging result [SF]: ✔️ el8 ✔️ el9 ✔️ debian ✔️ suse15. SL-JID 11459

[rohityadavcloud]

@blueorangutan test

[blueorangutan]

@rohityadavcloud a [SL] Trillian-Jenkins test job (ol8 mgmt + kvm-ol8) has been kicked to run smoke tests

[blueorangutan]

[SF] Trillian test result (tid-11762)
Environment: kvm-ol8 (x2), Advanced Networking with Mgmt server ol8
Total time taken: 47024 seconds
Marvin logs: https://github.com/blueorangutan/acs-prs/releases/download/trillian/pr9823-t11762-kvm-ol8.zip
Smoke tests completed. 110 look OK, 1 have errors, 0 did not run
Only failed and skipped tests results shown below:

Test	Result	Time (s)	Test File
ContextSuite context=TestISOUsage>:setup	Error	0.00	test_usage.py