[slurm-users] Exclude Slurm packages from the EPEL yum repository

[Ole Holm Nielsen]

We use the EPEL yum repository on our CentOS 7 nodes.  Today EPEL 
surprisingly delivers Slurm 20.11.2 RPMs, and the daily yum updates 
(luckily) fail with some errors:

--> Running transaction check
---> Package slurm.x86_64 0:20.02.6-1.el7 will be updated
--> Processing Dependency: slurm(x86-64) = 20.02.6-1.el7 for package: 
slurm-libpmi-20.02.6-1.el7.x86_64
--> Processing Dependency: libslurmfull.so()(64bit) for package: 
slurm-libpmi-20.02.6-1.el7.x86_64
---> Package slurm.x86_64 0:20.11.2-2.el7 will be an update
--> Processing Dependency: pmix for package: slurm-20.11.2-2.el7.x86_64
--> Processing Dependency: libfreeipmi.so.17()(64bit) for package: 
slurm-20.11.2-2.el7.x86_64
--> Processing Dependency: libipmimonitoring.so.6()(64bit) for package: 
slurm-20.11.2-2.el7.x86_64
--> Processing Dependency: libslurmfull-20.11.2.so()(64bit) for package: 
slurm-20.11.2-2.el7.x86_64
---> Package slurm-contribs.x86_64 0:20.02.6-1.el7 will be updated
---> Package slurm-contribs.x86_64 0:20.11.2-2.el7 will be an update
---> Package slurm-devel.x86_64 0:20.02.6-1.el7 will be updated
---> Package slurm-devel.x86_64 0:20.11.2-2.el7 will be an update
---> Package slurm-perlapi.x86_64 0:20.02.6-1.el7 will be updated
---> Package slurm-perlapi.x86_64 0:20.11.2-2.el7 will be an update
---> Package slurm-slurmdbd.x86_64 0:20.02.6-1.el7 will be updated
---> Package slurm-slurmdbd.x86_64 0:20.11.2-2.el7 will be an update
--> Running transaction check
---> Package freeipmi.x86_64 0:1.5.7-3.el7 will be installed
---> Package pmix.x86_64 0:1.1.3-1.el7 will be installed
---> Package slurm.x86_64 0:20.02.6-1.el7 will be updated
--> Processing Dependency: slurm(x86-64) = 20.02.6-1.el7 for package: 
slurm-libpmi-20.02.6-1.el7.x86_64
--> Processing Dependency: libslurmfull.so()(64bit) for package: 
slurm-libpmi-20.02.6-1.el7.x86_64
---> Package slurm-libs.x86_64 0:20.11.2-2.el7 will be installed
--> Finished Dependency Resolution
Error: Package: slurm-libpmi-20.02.6-1.el7.x86_64 
(@/slurm-libpmi-20.02.6-1.el7.x86_64)
            Requires: libslurmfull.so()(64bit)
            Removing: slurm-20.02.6-1.el7.x86_64 
(@/slurm-20.02.6-1.el7.x86_64)
                libslurmfull.so()(64bit)
            Updated By: slurm-20.11.2-2.el7.x86_64 (epel)
                Not found
Error: Package: slurm-libpmi-20.02.6-1.el7.x86_64 
(@/slurm-libpmi-20.02.6-1.el7.x86_64)
            Requires: slurm(x86-64) = 20.02.6-1.el7
            Removing: slurm-20.02.6-1.el7.x86_64 
(@/slurm-20.02.6-1.el7.x86_64)
                slurm(x86-64) = 20.02.6-1.el7
            Updated By: slurm-20.11.2-2.el7.x86_64 (epel)
                slurm(x86-64) = 20.11.2-2.el7
  You could try using --skip-broken to work around the problem
  You could try running: rpm -Va --nofiles --nodigest


We still run Slurm 20.02 and don't want EPEL to introduce any Slurm 
updates!!  Slurm must be upgraded with some care, see for example
https://wiki.fysik.dtu.dk/niflheim/Slurm_installation#upgrading-slurm

Therefore we must disable EPEL's slurm RPMs permanently.  The fix is to 
add to the file /etc/yum.repos.d/epel.repo an "exclude=slurm*" line like 
the last line in:

[epel]
name=Extra Packages for Enterprise Linux 7 - $basearch
#baseurl=http://download.fedoraproject.org/pub/epel/7/$basearch
metalink=https://mirrors.fedoraproject.org/metalink?repo=epel-7&arch=$basearch&infra=$infra&content=$contentdir
failovermethod=priority
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
exclude=slurm*

/Ole