Use 10.0 container to build RMM-enabled XGBoost

Jenkinsfile

@@ -70,10 +70,10 @@ pipeline {
             'build-cpu-non-omp': { BuildCPUNonOmp() },
             // Build reference, distribution-ready Python wheel with CUDA 10.0
             // using CentOS 6 image
-            'build-gpu-cuda10.0': { BuildCUDA(cuda_version: '10.0') },
+            'build-gpu-cuda10.0': { BuildCUDA(cuda_version: '10.0', build_rmm: true) },
             // The build-gpu-* builds below use Ubuntu image
             'build-gpu-cuda10.1': { BuildCUDA(cuda_version: '10.1') },
-            'build-gpu-cuda10.2': { BuildCUDA(cuda_version: '10.2', build_rmm: true) },
+            'build-gpu-cuda10.2': { BuildCUDA(cuda_version: '10.2') },
             'build-gpu-cuda11.0': { BuildCUDA(cuda_version: '11.0') },
             'build-jvm-packages-gpu-cuda10.0': { BuildJVMPackagesWithCUDA(spark_version: '3.0.0', cuda_version: '10.0') },
             'build-jvm-packages': { BuildJVMPackages(spark_version: '3.0.0') },
@@ -386,8 +386,8 @@ def TestPythonGPU(args) {
     sh "${dockerRun} ${container_type} ${docker_binary} ${docker_args} tests/ci_build/test_python.sh ${mgpu_indicator}"
     if (args.test_rmm) {
       sh "rm -rfv build/ python-package/dist/"
-      unstash name: "xgboost_whl_rmm_cuda${args.host_cuda_version}"
-      unstash name: "xgboost_cpp_tests_rmm_cuda${args.host_cuda_version}"
+      unstash name: "xgboost_whl_rmm_cuda${artifact_cuda_version}"
+      unstash name: "xgboost_cpp_tests_rmm_cuda${artifact_cuda_version}"
       sh "${dockerRun} ${container_type} ${docker_binary} ${docker_args} tests/ci_build/test_python.sh ${mgpu_indicator}"
     }
     deleteDir()
@@ -417,11 +417,11 @@ def TestCppGPU(args) {
     echo "Test C++, CUDA ${args.host_cuda_version}"
     def container_type = "gpu"
     def docker_binary = "nvidia-docker"
-    def docker_args = "--build-arg CUDA_VERSION=${artifact_cuda_version}"
+    def docker_args = "--build-arg CUDA_VERSION=${args.host_cuda_version}"
     sh "${dockerRun} ${container_type} ${docker_binary} ${docker_args} build/testxgboost"
     if (args.test_rmm) {
       sh "rm -rfv build/"
-      unstash name: "xgboost_cpp_tests_rmm_cuda${args.host_cuda_version}"
+      unstash name: "xgboost_cpp_tests_rmm_cuda${artifact_cuda_version}"
       echo "Test C++, CUDA ${args.host_cuda_version} with RMM"
       container_type = "rmm"
       docker_binary = "nvidia-docker"

tests/ci_build/Dockerfile.rmm

@@ -20,7 +20,7 @@ RUN \
 # NCCL2 (License: https://docs.nvidia.com/deeplearning/sdk/nccl-sla/index.html)
 RUN \
     export CUDA_SHORT=`echo $CUDA_VERSION | egrep -o '[0-9]+\.[0-9]'` && \
-    export NCCL_VERSION=2.7.5-1 && \
+    export NCCL_VERSION=2.4.8-1 && \
     apt-get update && \
     apt-get install -y --allow-downgrades --allow-change-held-packages libnccl2=${NCCL_VERSION}+cuda${CUDA_SHORT} libnccl-dev=${NCCL_VERSION}+cuda${CUDA_SHORT}