something to check

build/Dockerfile

@@ -3,15 +3,19 @@ ARG dirac_version=v6r22p26
 FROM alexanderrichards/dirac_ui:${dirac_version}
 ARG productionsystem_version=master
 
-RUN yum install -y git gcc cronie python3 python3-devel
+RUN yum install -y git gcc cronie python3 python3-devel yum-priorities
+RUN yum install -y http://repository.egi.eu/sw/production/umd/4/centos7/x86_64/updates/umd-release-4.1.3-1.el7.centos.noarch.rpm
+RUN yum install -y ca-policy-egi-core fetch-crl
+RUN systemctl enable fetch-crl-cron; systemctl start fetch-crl-cron
+RUN fetch-crl -v
 RUN python3 -m pip install --upgrade pip setuptools wheel
 RUN python3 -m pip install --upgrade productionsystem@git+https://github.com/alexanderrichards/ProductionSystem.git@$productionsystem_version
 RUN . /root/dirac_ui/bashrc && python -m pip install --upgrade pip setuptools wheel && python -m pip install --upgrade productionsystem@git+https://github.com/alexanderrichards/ProductionSystem.git@$productionsystem_version
 RUN yum clean all
 
 ## setup cron jobs - maybe not needed if mounting from outside.
 RUN echo "@daily userdb-update.py &>> /root/log/userdb-update.log" | crontab
-
+RUN echo -e "[userdb]\ntrusted_cas='/etc/grid-security/certificates'" > /root/.config/productionsystem/productionsystem.conf
 WORKDIR /root
 
 COPY startup.sh /root/startup.sh