megacli doesn't work on newer Dell PERC H7* hardware

[Drew Freiberger]

I'm deploying a site on Dell R640 with the following card which probes as megaraid_sas module and installs megacli via tools discovery.

18:00.0 Serial Attached SCSI controller: Broadcom / LSI MegaRAID Tri-Mode SAS3508 (rev 01)

Megacli don't appear to recognize this card and may require dell's 'perccli' which should be accounted for in tools/hwdiscovery.

Also additional information from lspci shows the subsystem as a Dell PERC controller, which we should be able to reference in Storage hardware discovery.

$ lspci -k|grep -B3 megaraid_sas
18:00.0 Serial Attached SCSI controller: Broadcom / LSI MegaRAID Tri-Mode SAS3508 (rev 01)
 DeviceName: Integrated RAID
 Subsystem: Dell PERC H740P Mini
 Kernel driver in use: megaraid_sas
 Kernel modules: megaraid_sas

We will need to update the "megaraid_sas" driver support to be more intelligent about what brand/subsystem/version of card is being used.

[Drew Freiberger (afreiberger)]

Reworking this bug to be related to Dell PercCLI controllers.

other issues noted in original bug description are actually open as separate bugs:

#1943736 Bad zip file is not reported to an operator
#1943738 Charm doesn't report values if megacli is installed from repository
#1943748 Missing libncurses5 for megacli when installing from tools.zip

[Drew Freiberger (afreiberger)]

The latest perccli utility from Dell supports Xenial, Bionic, and Focal and should be chosen if the LSI PCI device's Subsystem name starts with 'Dell PERC'.

https://www.dell.com/support/home/en-us/drivers/driversdetails?driverid=j91yg&oscode=us008&productcode=poweredge-r740

[Drew Freiberger (afreiberger)]

Fix is available in cs:~llama-charmers-next/hw-health-26 and will be released in 22.01 to cs:hw-health.