Add failover lasrepo

roles/common/tasks/yumrepos.yml

@@ -13,7 +13,9 @@
   yum_repository:
     name: lasrepo-nonfree
     description: Laboratory for Applications of Synchrotron radiation (CS)
-    baseurl: "https://las101.las.kit.edu/lasrepo/${releasever}/${basearch}/"
+    baseurl: 
+      - "https://las101.las.kit.edu/lasrepo/${releasever}/${basearch}/"
+      - "https://las100.las.kit.edu/lasrepo/${releasever}/${basearch}/"
     enabled: yes
     gpgcheck: no
     keepalive: yes