diff --git a/.github/workflows/core.yml b/.github/workflows/core.yml
index 1f465bbef9..e6854dbce2 100644
--- a/.github/workflows/core.yml
+++ b/.github/workflows/core.yml
@@ -5,10 +5,12 @@ on:
     paths:
       - 'ci/**'
       - 'core/**'
+      - 'docker/**'
   pull_request:
     paths:
       - 'ci/**'
       - 'core/**'
+      - 'docker/**'
 
 jobs:
   ubuntu:
@@ -23,6 +25,11 @@ jobs:
     steps:
       - name: Checkout Milvus
         uses: actions/checkout@v1
+      - name: Check Dockerfile
+        uses: mgrachev/action-hadolint@v1
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          reporter: github-pr-check # Default is github-pr-check
       - name: Docker Pull
         shell: bash
         run: |
@@ -65,6 +72,11 @@ jobs:
     steps:
       - name: Checkout Milvus
         uses: actions/checkout@v1
+      - name: Check Dockerfile
+        uses: mgrachev/action-hadolint@v1
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          reporter: github-pr-check # Default is github-pr-check
       - name: Docker Pull
         shell: bash
         run: |
diff --git a/.hadolint.yaml b/.hadolint.yaml
new file mode 100644
index 0000000000..44fab0b27a
--- /dev/null
+++ b/.hadolint.yaml
@@ -0,0 +1,4 @@
+ignored:
+  - DL3003
+  - DL3007
+  - DL3008
diff --git a/core/src/index/thirdparty/SPTAG/Dockerfile b/core/src/index/thirdparty/SPTAG/Dockerfile
index 7c1acd25e4..59c8c70166 100644
--- a/core/src/index/thirdparty/SPTAG/Dockerfile
+++ b/core/src/index/thirdparty/SPTAG/Dockerfile
@@ -6,9 +6,13 @@ COPY AnnService ./AnnService/
 COPY Test ./Test/
 COPY Wrappers ./Wrappers/
 
-RUN apt-get update && apt-get -y install wget build-essential \
+SHELL ["/bin/bash", "-o", "pipefail", "-c"]
+
+RUN apt-get update && apt-get install -y --no-install-recommends wget build-essential \
     # remove the following if you don't want to build the wrappers
-    openjdk-8-jdk python3-pip swig
+    openjdk-8-jdk python3-pip swig && \
+    apt-get remove --purge -y && \
+    rm -rf /var/lib/apt/lists/*
 
 # cmake >= 3.12 is required
 RUN wget "https://github.com/Kitware/CMake/releases/download/v3.14.4/cmake-3.14.4-Linux-x86_64.tar.gz" -q -O - \
diff --git a/core/src/index/thirdparty/faiss/Dockerfile b/core/src/index/thirdparty/faiss/Dockerfile
index 418fb2929e..9da42ef70f 100644
--- a/core/src/index/thirdparty/faiss/Dockerfile
+++ b/core/src/index/thirdparty/faiss/Dockerfile
@@ -22,7 +22,7 @@ WORKDIR /opt/faiss
 
 # --with-cuda=/usr/local/cuda-8.0 
 RUN ./configure --prefix=/usr --libdir=/usr/lib64 --without-cuda
-RUN make -j $(nproc)
+RUN make -j "$(nproc)"
 RUN make -C python
 RUN make test
 RUN make install
diff --git a/docker/build_env/cpu/centos7/Dockerfile b/docker/build_env/cpu/centos7/Dockerfile
index 80db8d2a80..39068cc0a4 100644
--- a/docker/build_env/cpu/centos7/Dockerfile
+++ b/docker/build_env/cpu/centos7/Dockerfile
@@ -1,3 +1,20 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
 FROM centos:centos7
 
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]
diff --git a/docker/build_env/cpu/ubuntu16.04/Dockerfile b/docker/build_env/cpu/ubuntu16.04/Dockerfile
index add4ce5f9b..425ea7c8aa 100644
--- a/docker/build_env/cpu/ubuntu16.04/Dockerfile
+++ b/docker/build_env/cpu/ubuntu16.04/Dockerfile
@@ -1,3 +1,20 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
 FROM ubuntu:16.04
 
 ENV DEBIAN_FRONTEND noninteractive
diff --git a/docker/build_env/cpu/ubuntu18.04/Dockerfile b/docker/build_env/cpu/ubuntu18.04/Dockerfile
index 0f8b696db4..b9ea30e56f 100644
--- a/docker/build_env/cpu/ubuntu18.04/Dockerfile
+++ b/docker/build_env/cpu/ubuntu18.04/Dockerfile
@@ -1,3 +1,20 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
 FROM ubuntu:18.04
 
 ENV DEBIAN_FRONTEND noninteractive
diff --git a/docker/build_env/gpu/centos7/Dockerfile b/docker/build_env/gpu/centos7/Dockerfile
index 185aad6555..25015c8c4f 100644
--- a/docker/build_env/gpu/centos7/Dockerfile
+++ b/docker/build_env/gpu/centos7/Dockerfile
@@ -1,3 +1,20 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
 FROM nvidia/cuda:10.1-devel-centos7
 
 ENV NVIDIA_DRIVER_CAPABILITIES compute,utility
diff --git a/docker/build_env/gpu/ubuntu16.04/Dockerfile b/docker/build_env/gpu/ubuntu16.04/Dockerfile
index c443b9b109..a2e19816e1 100644
--- a/docker/build_env/gpu/ubuntu16.04/Dockerfile
+++ b/docker/build_env/gpu/ubuntu16.04/Dockerfile
@@ -1,3 +1,20 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
 FROM nvidia/cuda:10.1-devel-ubuntu16.04
 
 ENV NVIDIA_DRIVER_CAPABILITIES compute,utility
diff --git a/docker/build_env/gpu/ubuntu18.04/Dockerfile b/docker/build_env/gpu/ubuntu18.04/Dockerfile
index ab636ac778..c010b64736 100644
--- a/docker/build_env/gpu/ubuntu18.04/Dockerfile
+++ b/docker/build_env/gpu/ubuntu18.04/Dockerfile
@@ -1,3 +1,20 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
 FROM nvidia/cuda:10.1-devel-ubuntu18.04
 
 ENV NVIDIA_DRIVER_CAPABILITIES compute,utility
diff --git a/docker/deploy/cpu/centos7/Dockerfile b/docker/deploy/cpu/centos7/Dockerfile
index c6c731a26c..04bf8a015b 100644
--- a/docker/deploy/cpu/centos7/Dockerfile
+++ b/docker/deploy/cpu/centos7/Dockerfile
@@ -1,3 +1,20 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
 FROM centos:centos7
 
 RUN yum install -y epel-release && \
diff --git a/docker/deploy/cpu/ubuntu16.04/Dockerfile b/docker/deploy/cpu/ubuntu16.04/Dockerfile
index 43f3a81cdb..31bebff208 100644
--- a/docker/deploy/cpu/ubuntu16.04/Dockerfile
+++ b/docker/deploy/cpu/ubuntu16.04/Dockerfile
@@ -1,3 +1,20 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
 FROM ubuntu:16.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
diff --git a/docker/deploy/cpu/ubuntu18.04/Dockerfile b/docker/deploy/cpu/ubuntu18.04/Dockerfile
index d3655417d3..d7913a640d 100644
--- a/docker/deploy/cpu/ubuntu18.04/Dockerfile
+++ b/docker/deploy/cpu/ubuntu18.04/Dockerfile
@@ -1,3 +1,20 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
 FROM ubuntu:18.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
diff --git a/docker/deploy/gpu/centos7/Dockerfile b/docker/deploy/gpu/centos7/Dockerfile
index 36bf88fcf1..3b7fac4403 100644
--- a/docker/deploy/gpu/centos7/Dockerfile
+++ b/docker/deploy/gpu/centos7/Dockerfile
@@ -1,3 +1,20 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
 FROM nvidia/cuda:10.1-devel-centos7
 
 ENV NVIDIA_DRIVER_CAPABILITIES compute,utility
diff --git a/docker/deploy/gpu/ubuntu16.04/Dockerfile b/docker/deploy/gpu/ubuntu16.04/Dockerfile
index fd7f09ee65..5ada80cd18 100644
--- a/docker/deploy/gpu/ubuntu16.04/Dockerfile
+++ b/docker/deploy/gpu/ubuntu16.04/Dockerfile
@@ -1,3 +1,20 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
 FROM nvidia/cuda:10.1-devel-ubuntu16.04
 
 ENV NVIDIA_DRIVER_CAPABILITIES compute,utility
diff --git a/docker/deploy/gpu/ubuntu18.04/Dockerfile b/docker/deploy/gpu/ubuntu18.04/Dockerfile
index a3940223d5..9640b6e976 100644
--- a/docker/deploy/gpu/ubuntu18.04/Dockerfile
+++ b/docker/deploy/gpu/ubuntu18.04/Dockerfile
@@ -1,3 +1,20 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
 FROM nvidia/cuda:10.1-devel-ubuntu18.04
 
 ENV NVIDIA_DRIVER_CAPABILITIES compute,utility
diff --git a/docker/test_env/Dockerfile b/docker/test_env/Dockerfile
index f913e7b2d2..363f3493e2 100644
--- a/docker/test_env/Dockerfile
+++ b/docker/test_env/Dockerfile
@@ -1,3 +1,20 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
 FROM python:3.6.8-jessie
 
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]
diff --git a/shards/Dockerfile b/shards/Dockerfile
index 594640619e..92509dd0a4 100644
--- a/shards/Dockerfile
+++ b/shards/Dockerfile
@@ -1,10 +1,12 @@
 FROM python:3.6
-RUN apt update && apt install -y \
+RUN apt-get update && apt-get install -y --no-install-recommends \
     less \
-    telnet
+    telnet && \
+    apt-get remove --purge -y && \
+    rm -rf /var/lib/apt/lists/*
 RUN mkdir /source
 WORKDIR /source
-ADD ./requirements.txt ./
+COPY ./requirements.txt ./
 RUN pip install -r requirements.txt
 COPY . .
-CMD python mishards/main.py
+CMD ["python", "mishards/main.py"]
diff --git a/tests/milvus_python_test/Dockerfile b/tests/milvus_python_test/Dockerfile
index ec78b943dc..dbc3f14ced 100644
--- a/tests/milvus_python_test/Dockerfile
+++ b/tests/milvus_python_test/Dockerfile
@@ -3,12 +3,13 @@ FROM python:3.6.8-jessie
 LABEL Name=megasearch_engine_test Version=0.0.1
 
 WORKDIR /app
-ADD . /app
+COPY . /app
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
     libc-dev build-essential && \
     python3 -m pip install -r requirements.txt && \
-    apt-get remove --purge -y 
+    apt-get remove --purge -y && \
+    rm -rf /var/lib/apt/lists/*
 
 ENTRYPOINT [ "/app/docker-entrypoint.sh" ]
 CMD [ "start" ]
\ No newline at end of file