From 460e647d391551bae447c7b4453e3577d31b04a6 Mon Sep 17 00:00:00 2001
From: Antoine Gicquel <antoine.gicquel@mailoo.org>
Date: Mon, 5 Feb 2018 15:20:40 +0100
Subject: [PATCH 1/3] fix the class com.sun.tools.javac.Main not found problem

---
 Dockerfile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Dockerfile b/Dockerfile
index 5332b3d3..d07f1b55 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -16,6 +16,7 @@ RUN wget https://github.com/kiwenlau/compile-hadoop/releases/download/2.7.2/hado
 # set environment variable
 ENV JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64 
 ENV HADOOP_HOME=/usr/local/hadoop 
+ENV HADOOP_CLASSPATH=/usr/lib/jvm/java-7-openjdk-amd64/lib/tools.jar
 ENV PATH=$PATH:/usr/local/hadoop/bin:/usr/local/hadoop/sbin 
 
 # ssh without key

From a1e0f1cc906a62799689e9c13588387f5294cf52 Mon Sep 17 00:00:00 2001
From: Antoine Gicquel <antoine.gicquel@mailoo.org>
Date: Mon, 5 Feb 2018 15:21:21 +0100
Subject: [PATCH 2/3] add a preserved start mode that doesn't remove previous
 data

---
 start-container-preserved.sh | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100755 start-container-preserved.sh

diff --git a/start-container-preserved.sh b/start-container-preserved.sh
new file mode 100755
index 00000000..4231aa39
--- /dev/null
+++ b/start-container-preserved.sh
@@ -0,0 +1,32 @@
+#!/bin/bash
+
+# the default node number is 3
+N=${1:-3}
+
+
+# start hadoop master container
+echo "start hadoop-master container..."
+sudo docker run -itd \
+                --net=hadoop \
+                -p 50070:50070 \
+                -p 8088:8088 \
+                --name hadoop-master \
+                --hostname hadoop-master \
+                kiwenlau/hadoop:1.0 &> /dev/null
+
+
+# start hadoop slave container
+i=1
+while [ $i -lt $N ]
+do
+	echo "start hadoop-slave$i container..."
+	sudo docker run -itd \
+	                --net=hadoop \
+	                --name hadoop-slave$i \
+	                --hostname hadoop-slave$i \
+	                kiwenlau/hadoop:1.0 &> /dev/null
+	i=$(( $i + 1 ))
+done 
+
+# get into hadoop master container
+sudo docker exec -it hadoop-master bash

From ee9c91b85625dec48bee901e0818de39b3a890b5 Mon Sep 17 00:00:00 2001
From: Antoine Gicquel <antoine.gicquel@mailoo.org>
Date: Mon, 5 Feb 2018 15:25:18 +0100
Subject: [PATCH 3/3] add preserved mode doc

---
 README.md | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/README.md b/README.md
index 1ea382b1..00159f0a 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,13 @@ cd hadoop-cluster-docker
 sudo ./start-container.sh
 ```
 
+
+If you want to keep the data from your previous launch
+
+```
+sudo ./start-container-preserved.sh
+```
+
 **output:**
 
 ```