diff --git a/api/VERSION b/api/VERSION
new file mode 100644
index 0000000000..1f3e3c351b
--- /dev/null
+++ b/api/VERSION
@@ -0,0 +1 @@
+v2.1-rc1
diff --git a/api/build.sh b/api/build.sh
index 811eb84269..5bae5d28b3 100755
--- a/api/build.sh
+++ b/api/build.sh
@@ -19,6 +19,9 @@ set -ex
 export ENV=local
 pwd=`pwd`
 
+VERSION=$(cat ./api/VERSION)
+GIT_VERSION=$(git log -1 --pretty=format:%h)
+
 rm -rf output && mkdir -p output/conf && mkdir -p output/dag-to-lua
 
 # get dag-to-lua lib
@@ -29,7 +32,7 @@ if [[ ! -f "dag-to-lua-1.1/lib/dag-to-lua.lua" ]]; then
 fi
 
 # build
-cd ./api && go build -o ../output/manager-api . && cd ..
+cd ./api && go build -o ../output/manager-api -ldflags "-X main.Version=${VERSION}(${GIT_VERSION})" . && cd ..
 
 cp ./api/conf/schema.json ./output/conf/schema.json
 cp ./api/conf/conf.yaml ./output/conf/conf.yaml