Support to build docker image for centos7 (#15787)

Signed-off-by: yudong.cai <yudong.cai@zilliz.com>

build/build_image.sh

@@ -24,11 +24,12 @@ set -x
 # Absolute path to the toplevel milvus directory.
 toplevel=$(dirname "$(cd "$(dirname "${0}")"; pwd)")
 
+OS_NAME="${OS_NAME:-ubuntu18.04}"
 MILVUS_IMAGE_REPO="${MILVUS_IMAGE_REPO:-milvusdb/milvus}"
 MILVUS_IMAGE_TAG="${MILVUS_IMAGE_TAG:-latest}"
 
 pushd "${toplevel}"
 
-docker build -f "./build/docker/milvus/Dockerfile" -t "${MILVUS_IMAGE_REPO}:${MILVUS_IMAGE_TAG}" .
+docker build -f "./build/docker/milvus/${OS_NAME}/Dockerfile" -t "${MILVUS_IMAGE_REPO}:${MILVUS_IMAGE_TAG}" .
 
 popd

build/docker/milvus/centos7/Dockerfile

@@ -0,0 +1,41 @@
+# Copyright (C) 2019-2020 Zilliz. All rights reserved.
+#
+# Licensed 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 milvusdb/openblas:centos7-20210706 AS openblas
+
+FROM centos:centos7
+
+RUN yum install -y wget && \
+    wget -P /etc/yum.repos.d/ http://mirrors.aliyun.com/repo/epel-7.repo && \
+    yum clean all && yum makecache && \
+    yum install -y libgomp libgfortran4 tbb-devel && \
+    rm -rf /var/cache/yum/*
+
+COPY --from=openblas /usr/lib/libopenblas-r0.3.9.so /usr/lib/
+
+RUN ln -s /usr/lib/libopenblas-r0.3.9.so /usr/lib/libopenblas.so.0 && \
+    ln -s /usr/lib/libopenblas.so.0 /usr/lib/libopenblas.so
+
+COPY ./bin/ /milvus/bin/
+
+COPY ./configs/ /milvus/configs/
+
+COPY ./lib/ /milvus/lib/
+
+ENV PATH=/milvus/bin:$PATH
+ENV LD_LIBRARY_PATH=/milvus/lib:$LD_LIBRARY_PATH:/usr/lib
+
+# Add Tini
+ADD https://github.com/krallin/tini/releases/download/v0.19.0/tini /tini
+RUN chmod +x /tini
+ENTRYPOINT ["/tini", "--"]
+
+WORKDIR /milvus

build/docker/milvus/ubuntu18.04/Dockerfile

@@ -39,4 +39,3 @@ RUN chmod +x /tini
 ENTRYPOINT ["/tini", "--"]
 
 WORKDIR /milvus/
-