Stop mirroring centos-8

This updates our rsync mirroring script for centos to stop mirroring
centos-8. We also delete the 8/ dir if it exists.

Depends-On: https://review.opendev.org/c/openstack/project-config/+/827184
Change-Id: Ida8605b3b2a3cd9ff358745e12714b27dbd9c59b

playbooks/roles/mirror-update/files/centos-mirror-update

@@ -35,6 +35,15 @@ RSYNC="rsync ${_DRY_RUN} -rltvz"
 BASE="/afs/.openstack.org/mirror/centos"
 K5START="k5start -t -f /etc/centos.keytab service/centos-mirror -- $TIMEOUT"
 
+if [[ ${DRY_RUN:-0} -ne 1 ]]; then
+    # Cleanup old repos
+    for REPO in 8 ; do
+        if [ -d $BASE/$REPO/ ]; then
+            $K5START rm -rf $BASE/$REPO/
+        fi
+    done
+fi
+
 #
 # -- Centos 8-stream --
 #
@@ -54,25 +63,6 @@ $K5START ${RSYNC} \
     --exclude=".*" \
     $MIRROR $BASE/8-stream
 
-#
-# -- Centos 8 --
-#
-
-MIRROR=rsync://mirror.dal10.us.leaseweb.net/centos/8/ # somewhere in TX
-
-if ! [ -f $BASE/8 ]; then
-    $K5START mkdir -p $BASE/8
-fi
-date --iso-8601=ns
-echo "Running Centos 8 rsync..."
-$K5START ${RSYNC} \
-    --delete \
-    --delete-excluded \
-    --exclude="isos" \
-    --exclude="ppc64le*" \
-    --exclude=".*" \
-    $MIRROR $BASE/8
-
 #
 # -- Centos 7 --
 #