Versionlock for epel

cc7-gridjob/Dockerfile

@@ -3,11 +3,13 @@ FROM cern/cc7-base:latest
 # CERN doesn't provide an EPEL mirror anymore
 RUN yum -y remove epel-release
 
-RUN yum -y update && \
-    yum -y clean all && rm -rf /var/cache
-
 # Install epel from fedora archive
 RUN yum -y install https://archives.fedoraproject.org/pub/archive/epel/7/x86_64/Packages/e/epel-release-7-14.noarch.rpm && \
+    yum versionlock epel-* && \
+    yum -y clean all && rm -rf /var/cache
+
+# Update base layer
+RUN yum -y update && \
     yum -y clean all && rm -rf /var/cache
 
 # Add repos