Create Apptainer Images from openSUSE/SLE
===========================================

To create openSUSE/SLE apptainer images from scratch a number
of bootdef variables need to be specified:

1. Create a bootdef file (for instance 'sle.def'), add
   BootStrap: zypper
2. Set the OS version:
   OSVersion: 15.0
   The version number corresponds to the Leap version or the
   SLE version and service pack level: <version>.<service_pack_level>
   Example: SLE-12 SP4 would be 12.4.
   The inital release of a major version corresponds to
   <service_pack_level> 0.  
3. For openSUSE the following additional variables need to be
   specified:
   * MirrorURL: URL to the installation repository.
                Check 'man 8 zypper' for supported formats
   * UpdateURL: (optional) URI of the update repository
4. For SLE, all required settings are obtained from SCC.
   The following variables are recognized:
   * Product: The product code: The following forms may be
                 used:
                 <product_id>
                 <product_id>/<os_version>
                 <product_id>/<os_version>/<arch>
                 <product_id>: SLES, SLE-HPC (SLE-12),
                               SLE_HPC (SLE-15), SLED
                 <os_version>: optional, if ommitted, the value
                               of OSVersion will be used.
                               The variable %{OSVERSION} is
                               recognized and replaced by OSVersion.
                 <arch>      : The architecture to use. Defaults
                               to 'uname -m'.
   * User: The email a subscription is registed with SCC.
   * Regcode: The SCC registration code provided with the subscription.
   * ProductPGP:  The PGP key used to sign the repositories. Each line must
              be terminated with \n. Long lines may be broken using the
              continuation character '\'. See below.
              Note: this is not required when an installer repository is
              provided with MirrorURL.
   Beginning with version 15, the URI to the installer image needs to be
   provided as well:
   * MirrorURL: Repository containing the SLE Installer (see also above).
   Since SLE-15 consists of modules, a list of modules to be used should
   to be specified as well:
   * Modules: Specify the modules in a comma separated list without
                 spaces. Example:
                 SLEModules: sle-module-basesystem,sle-module-server-applications,sle-module-web-scripting,sle-module-hpc

Examples
========
Example defintions for SLE12-SP5 and SLE15-SP3 are in the same 
directory as README.SUSE

ProductPGP
==========
SLEpgp: -----BEGIN PGP PUBLIC KEY BLOCK-----\n\
Version: rpm-4.11.2 (NSS-3)\n\
\n\
mQENBFEKlmsBCADbpZZbbSC5Zi+HxCR/ynYsVxU5JNNiSSZabN5GMgc9Z0hxeXxp\n\
YWvFoE/4n0+IXIsp83iKvxf06Eu8je/DXp0lMqDZu7WiT3XXAlkOPSNV4akHTDoY\n\
91SJaZCpgUJ7K1QXOPABNbREsAMN1a7rxBowjNjBUyiTJ2YuvQRLtGdK1kExsVma\n\
hieh/QxpoDyYd5w/aky3z23erCoEd+OPfAqEHd5tQIa6LOosa63BSCEl3milJ7J9\n\
vDmoGPAoS6ui7S2R5X4/+PLN8Mm2kOBrFjhmL93LX0mrGCMxsNsKgP6zabYKQEb8\n\
L028SXvl7EGoA+Vw5Vd3wIGbM73PfbgNrXjfABEBAAG0KFN1U0UgUGFja2FnZSBT\n\
aWduaW5nIEtleSA8YnVpbGRAc3VzZS5kZT6JATwEEwECACYCGwMGCwkIBwMCBBUC\n\
CAMEFgIDAQIeAQIXgAUCWEfrHwUJDsIitAAKCRBwr56BOdt8gpqUB/wPSSS5BcDu\n\
Oi4n02cj4Hdt7WITKBjjo0lG1fXG1ppx1wOST+s8FertMVFY53TW6FGjcYtwVOIq\n\
rsMYiV6kf1NxUV/jcAy7VmC5EZnO0R/D3sT4Oh5hsLtERauZolK5BZmd0S51Qa8e\n\
TxZ5mX9PL2i3s/ShETc30drf83ugc7B4yZPNQWXNDPgGcC+hEeC5qw48RzHYIpUt\n\
RzHmefR5Z3ioTUbDlzy+SGP2uA7mhR4Lfk/df5fYxWfCoKlyGjtrvA65cB+Pksyn\n\
xrAeBuB+vBM+KnDrxW2Sn4AbWkzH//dfz9OJDJu4UM91hb7qxM0OkrXHQV3iNqzg\n\
MDEhky/9NqMy\n\
=GdP5\n\
-----END PGP PUBLIC KEY BLOCK-----