check secret availability before run

modules/conf_ceph.sh

@@ -149,6 +149,9 @@ precheck_conf_ceph()
                 prnt m "you need to export it temporarily in your environment, using the"
                 prnt m "\"CEPH_SECRET\" variable."
                 die 181
+            elif ! check_secret $CEPH_SECRET; then
+                prnt E "The declared $CEPH_SECRET is not accessible."
+                die 183
             fi
             if [[ -z $CEPH_MOUNTS ]]; then
                 prnt E "No CEPH mounts declared, despite reachable servers."