Merge pull request apache#7 from liumihust/feature/add_nscd_acs

add nscd for name service hosts cache

Author: ringtail

resource-managers/kubernetes/docker/src/main/dockerfiles/spark/Dockerfile

@@ -38,7 +38,7 @@ ARG k8s_tests=kubernetes/tests
 RUN set -ex && \
     apt-get update && \
     ln -s /lib /lib64 && \
-    apt install -y bash tini libc6 libpam-modules libnss3 && \
+    apt install -y bash tini libc6 libpam-modules libnss3 nscd && \
     mkdir -p /opt/spark && \
     mkdir -p /opt/spark/work-dir && \
     touch /opt/spark/RELEASE && \

resource-managers/kubernetes/docker/src/main/dockerfiles/spark/entrypoint.sh

@@ -16,6 +16,9 @@
 # limitations under the License.
 #
 
+# nscd start
+service nscd start
+
 # echo commands to the terminal output
 set -ex