diff --git a/centos/Dockerfile b/centos/Dockerfile
index 12c24dc..b1a8e61 100644
--- a/centos/Dockerfile
+++ b/centos/Dockerfile
@@ -8,6 +8,9 @@ ARG GIT_REPO=https://git.openstack.org/openstack/${PROJECT}
 ARG GIT_REF
 ARG GIT_REF_REPO=https://git.openstack.org/openstack/${PROJECT}
 ARG SCRIPTS=https://github.com/yaodu/common/archive/0.1.2.tar.gz
+ARG OVERRIDE=override
+
+ADD $OVERRIDE /
 
 RUN set -x \
     && yum install --setopt=tsflags=nodocs -y python curl \
diff --git a/centos/override/.gitkeep b/centos/override/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/debian/Dockerfile b/debian/Dockerfile
index a71ceb2..86b5616 100644
--- a/debian/Dockerfile
+++ b/debian/Dockerfile
@@ -8,6 +8,9 @@ ARG GIT_REPO=https://git.openstack.org/openstack/${PROJECT}
 ARG GIT_REF
 ARG GIT_REF_REPO=https://git.openstack.org/openstack/${PROJECT}
 ARG SCRIPTS=https://github.com/yaodu/common/archive/0.1.2.tar.gz
+ARG OVERRIDE=override
+
+ADD $OVERRIDE /
 
 RUN set -x \
     && apt-get update \
diff --git a/debian/override/.gitkeep b/debian/override/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/ubuntu/Dockerfile b/ubuntu/Dockerfile
index cc5d7ff..a56f1f3 100644
--- a/ubuntu/Dockerfile
+++ b/ubuntu/Dockerfile
@@ -8,6 +8,9 @@ ARG GIT_REPO=https://git.openstack.org/openstack/${PROJECT}
 ARG GIT_REF
 ARG GIT_REF_REPO=https://git.openstack.org/openstack/${PROJECT}
 ARG SCRIPTS=https://github.com/yaodu/common/archive/0.1.2.tar.gz
+ARG OVERRIDE=override
+
+ADD $OVERRIDE /
 
 RUN set -x \
     && apt-get update \
diff --git a/ubuntu/override/.gitkeep b/ubuntu/override/.gitkeep
new file mode 100644
index 0000000..e69de29