diff --git a/Dockerfiles/Cassandra-3/Dockerfile b/Dockerfiles/Cassandra-3/Dockerfile
index 16ec4cd..3256371 100644
--- a/Dockerfiles/Cassandra-3/Dockerfile
+++ b/Dockerfiles/Cassandra-3/Dockerfile
@@ -8,11 +8,12 @@ EXPOSE 7001 7199 8778 9042
 ENV CASSIE_VERSION=3.11.2
 ENV DEBIAN_FRONTEND=noninteractive
 
-RUN echo "deb http://www.apache.org/dist/cassandra/debian 311x main" | tee -a /etc/apt/sources.list.d/apache.cassandra.list
+RUN apt-get update && apt-get -y install gnupg
 RUN curl https://www.apache.org/dist/cassandra/KEYS | apt-key add -
+RUN echo "deb http://www.apache.org/dist/cassandra/debian 311x main" | tee -a /etc/apt/sources.list.d/apache.cassandra.list
 
 RUN apt-get -y update && apt-get -y -o Dpkg::Options::='--force-confold' --fix-missing dist-upgrade
-RUN apt-get -y install vim less sysstat \
+RUN apt-get -y install vim less sysstat netcat \
     cassandra=$CASSIE_VERSION \
     cassandra-tools=$CASSIE_VERSION && \
     apt-get clean && \
@@ -38,6 +39,7 @@ RUN rm -f /etc/cassandra/cassandra.yaml \
           /etc/cassandra/cassandra-rackdc.properties && \
     chmod 0777 /etc/cassandra
 
+COPY dump-ring-token.sh  /usr/local/bin/
 COPY planb-cassandra.sh /usr/local/bin/
 
 ENV HOME=/var/lib/cassandra
diff --git a/Dockerfiles/Cassandra-3/dump-ring-token.sh b/Dockerfiles/Cassandra-3/dump-ring-token.sh
new file mode 100755
index 0000000..efdd5c3
--- /dev/null
+++ b/Dockerfiles/Cassandra-3/dump-ring-token.sh
@@ -0,0 +1,15 @@
+#!/bin/bash
+
+function waiting_client_port_open() {
+    local port=$1
+
+    while ! nc -z localhost $port; do   
+        sleep 10
+    done
+}
+
+waiting_client_port_open 9042
+
+IP=$(curl 'http://169.254.169.254/latest/meta-data/local-ipv4')
+TOKENS=$(nodetool ring | grep ${IP} | awk '{print $NF ","}' | xargs)
+echo ${TOKENS:0:-1}
diff --git a/Dockerfiles/Cassandra-3/planb-cassandra.sh b/Dockerfiles/Cassandra-3/planb-cassandra.sh
index eae1807..83c0638 100755
--- a/Dockerfiles/Cassandra-3/planb-cassandra.sh
+++ b/Dockerfiles/Cassandra-3/planb-cassandra.sh
@@ -119,5 +119,9 @@ if [ -n "$DC_SUFFIX" ]; then
     echo "dc_suffix=$DC_SUFFIX" > /etc/cassandra/cassandra-rackdc.properties
 fi
 
+# Initialze the script to dump all the token belong to this node in the ring.
+mkdir -p ${CASSANDRA_DATA_DIR}/metadata
+nohup /usr/local/bin/dump-ring-token.sh > ${CASSANDRA_DATA_DIR}/metadata/ring-tokens &
+
 echo "Starting Cassandra ..."
 exec /usr/sbin/cassandra -R -f