Updates CentOS 7 GPU CI image base image to cuda10-devel and manually…

… installs cuDNN version 7.3.1.20

ci/docker/Dockerfile.build.centos7_gpu

@@ -18,7 +18,9 @@
 #
 # Dockerfile to build and run MXNet on CentOS 7 for GPU
 
-FROM nvidia/cuda:9.1-cudnn7-devel-centos7
+FROM nvidia/cuda:10.0-devel-centos7
+
+ENV CUDNN_VERSION=7.3.1.20
 
 WORKDIR /work/deps
 
@@ -28,6 +30,8 @@ COPY install/centos7_ccache.sh /work/
 RUN /work/centos7_ccache.sh
 COPY install/centos7_python.sh /work/
 RUN /work/centos7_python.sh
+COPY install/centos7_cudnn.sh /work/
+RUN /work/centos7_cudnn.sh
 
 ARG USER_ID=0
 COPY install/centos7_adduser.sh /work/

ci/docker/install/centos7_cudnn.sh

@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+
+# 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.
+
+# build and install are separated so changes to build don't invalidate
+# the whole docker cache for the image
+
+set -ex
+
+# Multipackage installation does not fail in yum
+CUDNN_DOWNLOAD_SUM=4e15a323f2edffa928b4574f696fc0e449a32e6bc35c9ccb03a47af26c2de3fa
+curl -fsSL http://developer.download.nvidia.com/compute/redist/cudnn/v7.3.1/cudnn-10.0-linux-x64-v7.3.1.20.tgz -O
+echo "$CUDNN_DOWNLOAD_SUM cudnn-10.0-linux-x64-v7.3.1.20.tgz" | sha256sum -c -
+tar --no-same-owner -xzf cudnn-10.0-linux-x64-v7.3.1.20.tgz -C /usr/local
+rm cudnn-10.0-linux-x64-v7.3.1.20.tgz
+ldconfig
+