The 'bash download_mirror.sh' step seems to be very fragile.  e.g. this morning I tried to start fresh and it failed at several points.

   ------ using kernel-3.10.0-862.3.2.el7 to search kernel-3.10.0-862.3.2.el7.src.rpm ------
   --> run: sudo -E yumdownloader -q -C --source kernel-3.10.0-862.3.2.el7
   Looking for kernel-3.10.0-862.3.2.el7.src.rpm
   No source RPM found for kernel-3.10.0-862.3.2.el7.x86_64
   Nothing to download


    ------ using epel-rpm-macros-7-18 to search epel-rpm-macros-7-18.noarch.rpm ------
   --> run: sudo -E yumdownloader -q -C epel-rpm-macros-7-18 --archlist=noarch,x86_64
   Looking for epel-rpm-macros-7-18.noarch.rpm...
   No Match for argument epel-rpm-macros-7-18
   Nothing to download

and the tarball downloads failed on.

   --2018-07-11 13:13:28--  http://git.infradead.org/users/jjs/linux-tpmdd.git/snapshot/fd5c78694f3f1c875e293de7a641ba8a3d60d00d.tar.g
   Resolving git.infradead.org (git.infradead.org)... 198.137.202.133, 2607:7c80:54:e::133
   Connecting to git.infradead.org (git.infradead.org)|198.137.202.133|:80... connected.
   HTTP request sent, awaiting response... 200 OK
   Length: unspecified [application/x-gzip]
   Saving to: 'fd5c78694f3f1c875e293de7a641ba8a3d60d00d.tar.gz'

   2018-07-11 13:14:34 (0.00 B/s) - 'fd5c78694f3f1c875e293de7a641ba8a3d60d00d.tar.gz' saved [0]

   tar: This does not look like a tar archive

   gzip: stdin: unexpected end of file
   tar: Child returned status 1
   tar: Error is not recoverable: exiting now
   mv: cannot stat 'linux-tpmdd-fd5c786/drivers/char/tpm': No such file or directory
   tar: tpm: Cannot stat: No such file or directory
   tar: Exiting with failure status due to previous errors
   /localdisk
   tss2-930.tar.gz
   /localdisk/output/stx-r1/CentOS/pike/downloads /localdisk
   ./tarball-dl.sh: line 156: git: command not found
   ./tarball-dl.sh: line 157: pushd: ibmtpm20tss-tss: No such file or directory
   ./tarball-dl.sh: line 158: git: command not found
   /localdisk
   mv: cannot stat 'ibmtpm20tss-tss': No such file or directory
   tar: tss2-930: Cannot stat: No such file or directory
   tar: Exiting with failure status due to previous errors
   ./tarball-dl.sh: line 165: popd: directory stack empty

Is this really going to be our default operating mode?   Never knowing, day by day, when the next package will be dropped from an upstream source.  Is it possible for strarlingX to host it's own mirrors... of at least the needed subset of packages?

Scott