VNFS image oversize

[diedpigs]

now in the script, we use a customized template to make chroot environment. line 31-38 in file roles/compute_build_vnfs/tasks/main.yml which will install a bunch of software defined in templates roles/compute_build_vnfs/templates/extend_compute_packages.j2 and roles/compute_build_vnfs/templates/base_packages.j2.
After wwmkchroot, this customized environment will have footprint of 1.3G which is around 900M bigger than default centos-7 environment, 451M.

I am not sure what in the customized list of packages is needed but after all the required packages are installed, the chroot environment will become 2.7G which will cause compute node privisioning failed due to lack of memory.

So should we move back to default environment or just increase memory size of compute node?