You need the epel repository:
sudo yum install epel-release
Install voms-client
sudo su -
yum install voms-clients-cpp
Configure muoncoll.infn.it voms:
mkdir /etc/vomses/
cat << EOF > /etc/vomses/muoncoll.infn.it-voms2.cnaf.infn.it
"muoncoll.infn.it" "voms2.cnaf.infn.it" "15022" "/DC=org/DC=terena/DC=tcs/C=IT/ST=Roma/O=Istituto Nazionale di Fisica Nucleare/OU=CNAF/CN=voms2.cnaf.infn.it" "muoncoll.infn.it"
EOF
and:
mkdir /etc/grid-security/vomsdir/muoncoll.infn.it
cat << EOF > /etc/grid-security/vomsdir/muoncoll.infn.it/voms2.cnaf.infn.it.lsc
/DC=org/DC=terena/DC=tcs/C=IT/ST=Roma/O=Istituto Nazionale di Fisica Nucleare/OU=CNAF/CN=voms2.cnaf.infn.it
/C=NL/O=GEANT Vereniging/CN=GEANT eScience SSL CA 4
EOF
Install certificates:
yum install ca-certificates
Add EGI repository:
cat << EOF > /etc/yum.repos.d/EGI-trustanchors.repo
# EGI Software Repository - REPO META (releaseId,repositoryId,repofileId) - (16810,-,2835)[EGI-trustanchors]
[EGI-trustanchors]
name=EGI-trustanchors
baseurl=http://repository.egi.eu/sw/production/cas/1/current/
enabled=1
gpgcheck=1
gpgkey=http://repository.egi.eu/sw/production/cas/1/GPG-KEY-EUGridPMA-RPM-3
EOF
Install certificates:
yum install -y ca-policy-egi-core
Install gfal2
If the version for the default python interpreter is 2.* execute:
yum install -y gfal2-all python2-gfal2 python2-gfal2-util
otherwise execute:
yum install -y gfal2-all python3-gfal2 python3-gfal2-util