add centos7 deploy dockerfile

docker/deploy/cpu/centos7/Dockerfile

+FROM centos:centos7
+
+RUN yum install -y epel-release && \
+    yum install -y libgomp libgfortran4 mysql-devel && \
+    rm -rf /var/cache/yum/*
+
+COPY ./milvus /var/lib/milvus
+COPY ./docker-entrypoint.sh /var/lib/milvus
+ENV LD_LIBRARY_PATH="$LD_LIBRARY_PATH:/var/lib/milvus/lib"
+
+WORKDIR /var/lib/milvus
+
+ENTRYPOINT [ "/var/lib/milvus/docker-entrypoint.sh" ]
+
+CMD [ "start" ]
+
+EXPOSE 19530

docker/deploy/cpu/centos7/docker-entrypoint.sh

+#!/bin/bash
+
+set -e
+
+if [ "$1" == 'start' ]; then
+    cd /var/lib/milvus/scripts && ./start_server.sh
+fi
+
+exec "$@"

docker/deploy/gpu/centos7/Dockerfile

+FROM nvidia/cuda:10.1-devel-centos7
+
+ENV NVIDIA_DRIVER_CAPABILITIES compute,utility
+
+RUN yum install -y epel-release && \
+    yum install -y libgomp libgfortran4 mysql-devel && \
+    rm -rf /var/cache/yum/*
+
+COPY ./milvus /var/lib/milvus
+COPY ./docker-entrypoint.sh /var/lib/milvus
+ENV LD_LIBRARY_PATH="$LD_LIBRARY_PATH:/var/lib/milvus/lib"
+
+WORKDIR /var/lib/milvus
+
+ENTRYPOINT [ "/var/lib/milvus/docker-entrypoint.sh" ]
+
+CMD [ "start" ]
+
+EXPOSE 19530

docker/deploy/gpu/centos7/docker-entrypoint.sh

+#!/bin/bash
+
+set -e
+
+if [ "$1" == 'start' ]; then
+    cd /var/lib/milvus/scripts && ./start_server.sh
+fi
+
+exec "$@"