RHCOS partition resizing

[jeniferh]

Updating the custom paritioning config:

1. Configure 600G for RHCOS sysroot
2. Create 100G partition, intended to be used as LSO storageclass for Monitoring
3. Create partition using the rest of the device, intended to be used as an OSD

[RamLavi]

Hey @jeniferh, there is currently a problem with the ci. The issue is currently handled by this PR.
does ci tests pass locally for you?

You can also try to rebase your PR with thePR fix coreos/coreos-assembler#2576 to be able to get CI to pass

[RamLavi]

Hey @jeniferh, please rebase your PR on top of latest main branch so that the ci will pass

[jeniferh]

Thanks @RamLavi I just rebased, sorry for the delay I was OOO.

[kobi86]

@RamLavi should we add this to the make file?

[RamLavi]

@kobi86 good question, but remember the Makefile is in a different branch..

@jeniferh do we just want to notify on the README that we can change the OFFSET or do we want to really change it?
if the answer is the latter then I wonder why aren't we just changing this on the custom-config.fcc?

[jeniferh]

Ideally giving RHCOS 600GB is good practice since by default all container image storage (and Monitoring etc. if not configured otherwise) will use this space, I just wanted to note how that value could be changed in very space-constrained environments if needed.

[RamLavi]

I see, so to answer @kobi86 I think that on simplify-networking branch this should be added to the README as a note and not to the makefile..

[RamLavi]

/lgtm

[RamLavi]

jeniferh this PR was lgtmed a long time ago but did not get approve
is this still something you want to be merged to the main branch?

[jeniferh]

Hey @RamLavi, these changes are used by our customer for awhile now, although one issue is it assumes a 1.5TB+ disk size. There may be a better solution (i.e. partitioning via ignition instead of sgdisk) but it has been working for them as-is.

[RamLavi]

The importance of this repo is that is is as much aligned to the customer's actual setup.

Please change the commit message to have a signature and I'll merge it :)

git commit -s --amend