fix(build): allowing more explicit attempts for epel download

Signed-off-by: Raphael Defosseux <raphael.defosseux@openairinterface.org>

build/scripts/build_helper

@@ -137,7 +137,6 @@ check_supported_distribution() {
         "rhel8.5")     return 0 ;;
         "rhel8.6")     return 0 ;;
         "rhel8.7")     return 0 ;;
-        #"centos7")     return 0 ;;
     esac
     return 1
 }
@@ -297,7 +296,10 @@ check_enable_epel_repos() {
       echo "EPEL repos already present. Good."
     else
       echo "EPEL repos not present. Installing them."
-      $SUDO $INSTALLER install $OPTION https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
+      wget --tries=4 --retry-connrefused --wait=8 \
+        https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
+      $SUDO $INSTALLER install $OPTION epel-release-latest-7.noarch.rpm
+      rm -f epel-release-latest-7.noarch.rpm
     fi
   fi
 }

docker/Dockerfile.nrf.rhel8

@@ -47,6 +47,7 @@ RUN rm -f /etc/rhsm-host && \
     	git \
         diffutils \
         libasan \
+        wget \
         file && \
     echo "/usr/local/lib" > /etc/ld.so.conf.d/local-lib.conf && \
     echo "/usr/local/lib64" >> /etc/ld.so.conf.d/local-lib.conf