release: tweak Oracle Cloud settings

[dch]

Summary

• use raw image disk type and enable zfs, this yields smaller images for upload after using native qcow2 + zstd compression

Test Plan

• removed bump image size due to python bloat in cloudinit packages because re-testing shows its no longer required

$ qemu-img convert -S 512b -p \
  -O qcow2 -c -o compression_type=zstd  \
  /usr/obj/usr/src/amd64.amd64/release/oracle.zfs.raw \
  /tmp/qc2

yields a 4.0GiB -> ~ 890MiB reduction :-)

[cperciva]

Just to confirm, the Oracle upload system doesn't have any preference for disk image formats?

release/Makefile.vm

50

As with OCI->ORACLE rename, we want =? here.

[lwhsu]

It's interesting that using raw could result smaller image size than qcow2.

[emaste]

It's interesting that using raw could result smaller image size than qcow2.

I'm guessing this means we were generating an uncompressed qcow2, and converting raw to qcow2 includes compression as a side effect.

The image size bump doesn't seem to be reflected in this review (I'm guessing it got lost in the migration from the other review) but is fine with me.

release/Makefile.vm

50

?=

[dch]

Make ORACLE_FSLIST? overridable.

[dch]

i.e. raw > mkimg qcow2 > recompressed raw qcow2.

Oracle bills based on raw uploaded size, so saving 2/3 of the image size makes a big difference for everybody.

See https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=263029 for more details.

Ed - the VMSIZE change is in the next file.

[emaste]

LGTM with ?=

[dch]

remove VMSIZE change we don't need it anymore

[dch]

release/tools/oracle.conf

29–30 ↗

(On Diff #144878)

this isn't required anymore - not sure what's changed, but I bumped this locally over a year ago, and I'm not seeing the bloat that broke images in the past.