MTL-1561 Add GCP mode for supporting GCP NVME

[rustydb]

Summary and Scope

• Fixes MTL-1561
• Relates to VSHA-297

Issue Type

• RFE Pull Request

This new toggle will insert the partitioning prefix into all disks,
assuming that the disks are GCP provided NVME.

This implicitly means that only NVME is supported when metal.gcp-mode is
engaged. We can add logic to handle our full-suite of busses, only if
we have a use in SAS and SATA GCP disks.

Prerequisites

• I have included documentation in my PR (or it is not required)
• I tested this on internal system (x) (if yes, please include results or a description of the test)
• I tested this on vshasta (x) (if yes, please include results or a description of the test)

This needs to be tested on GCP and metal, for the new and old behaviors (respectively).

Related PRs:

• MTL-1561 adjust sorting to cease grabbing GCP partitions dracut-metal-dmk8s#13
• MTL-1561 adjust sorting to cease grabbing GCP partitions dracut-metal-luksetcd#19

Idempotency

Risks and Mitigations

This does not bring the full suite of busses to GCP, it only enables NVME for GCP.

[rustydb]

ncn-w003 login: root
Password:
l=================     ===============    ==================
\\ . . . . . . .\\   //. . . . . . .\\  |\\. . . . . . . .\\
||. . ._____. . .|| ||. . ._____. . .|| | || . ._____. . .||
|| . .||   ||. _-|| ||-_ .||   \|____|/ | ||-_.||   || . .||
||. . ||   ||-'  || ||  `-||            | ||  `||   ||. . ||
|| . _||   ||    || ||    \|___-'\___   | ||   ||   || . .||
||_-' ||   ||    || ||               |\ | ||   ||   ||'-__||
||    ||   || .===' `===.         .==='.' /==. ||   ||    ||
||    ||   |/    _-'  '_`.==..==='_-'   '-_    \|   ||    ||
||    |/   |/ _-'       `-_/''\_-'         '-_ \|   \|    ||
||.===.'    ''                                      '.===.||
=='    '                                            '    '==
\   _-'                                              '-_   /
 `''                                                    ''`

sncn-w003:~ # lsblk
NAME                       MAJ:MIN RM   SIZE RO TYPE  MOUNTPOINT
loop0                        7:0    0   4.7G  1 loop  /run/rootfsbase
loop1                        7:1    0   3.2G  0 loop
└─live-overlay-pool        254:0    0    32G  0 dm
loop2                        7:2    0    32G  0 loop
└─live-overlay-pool        254:0    0    32G  0 dm
sda                          8:0    0 447.1G  0 disk
├─sda1                       8:1    0   476M  0 part
│ └─md127                    9:127  0 475.9M  0 raid1 /metal/recovery
├─sda2                       8:2    0  22.8G  0 part
│ └─md126                    9:126  0  22.8G  0 raid1 /run/initramfs/live
├─sda3                       8:3    0 139.7G  0 part
│ └─md125                    9:125  0 139.6G  0 raid1 /run/initramfs/overlayfs
└─sda4                       8:4    0 139.7G  0 part
  └─md124                    9:124  0 279.1G  0 raid0
    └─metalvg0-CRAYS3CACHE 254:1    0   200G  0 lvm   /var/lib/s3fs_cache
sdb                          8:16   0 447.1G  0 disk
├─sdb1                       8:17   0   476M  0 part
│ └─md127                    9:127  0 475.9M  0 raid1 /metal/recovery
├─sdb2                       8:18   0  22.8G  0 part
│ └─md126                    9:126  0  22.8G  0 raid1 /run/initramfs/live
├─sdb3                       8:19   0 139.7G  0 part
│ └─md125                    9:125  0 139.6G  0 raid1 /run/initramfs/overlayfs
└─sdb4                       8:20   0 139.7G  0 part
  └─md124                    9:124  0 279.1G  0 raid0
    └─metalvg0-CRAYS3CACHE 254:1    0   200G  0 lvm   /var/lib/s3fs_cache
sdc                          8:32   0   1.7T  0 disk
├─sdc1                       8:33   0  69.8G  0 part  /run/containerd
├─sdc2                       8:34   0 645.5G  0 part  /run/lib-containerd
└─sdc3                       8:35   0 178.8G  0 part  /var/lib/kubelet
ncn-w003:~ # rpm -qa | grep dracut-metal
dracut-metal-luksetcd-1.6.0-1~mtl_1561_adjust_selector~20211204010951.687dbb9.noarch
dracut-metal-dmk8s-1.6.0-1~mtl_1561_adjust_selector~20211204010922.efee73b.noarch
dracut-metal-mdsquash-1.8.0-1~mtl_1561_support_gcp_nvme~20211204010441.f256555.noarch

All expected partitions were created and the correct disks were selected on metal.