openSUSE/SUSE specific Settings
===============================

openSUSE and SUSE have a small difference with upstream default. 
This means the SUID root binaries distributed by singularty are
executable only by users belonging to the group 'apptainer'.

Otherwise, users will get an error message like this one:

FATAL:   while executing /usr/lib/apptainer/bin/starter-suid: permission denied

To add a user to the group apptainer, execute (as root):

 # usermod -a -G apptainer <user_login>

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-----