set -o errexit
set -o pipefail
-# use proxy url to replace the nomral URL, for googleusercontent.com will be blocked randomly
+# disable Fuel ISO download for master branch
+[[ ! "$BRANCH" =~ (danube) ]] && exit 0
+
+# use proxy url to replace the normal URL, or googleusercontent.com will be blocked randomly
[[ "$NODE_NAME" =~ (zte) ]] && GS_URL=${GS_BASE_PROXY%%/*}/$GS_URL
if [[ "$JOB_NAME" =~ "merge" ]]; then