Update spark

haproxy_web/web/healthcheck.html

@@ -0,0 +1,2 @@
+
+Got request from HAProxy.

spark_cluster/docker-compose.yml

@@ -5,8 +5,10 @@
 # After startup, try submit a pi calculation application.
 #  /usr/local/spark/bin/spark-submit --master spark://master:7077 --class org.apache.spark.examples.SparkPi /usr/local/spark/lib/spark-examples-1.4.0-hadoop2.6.0.jar 1000
 
-master:
-  image: sequenceiq/spark:1.4.0
+version: "3.9"
+services:
+  master:
+    image: sequenceiq/spark:1.6.0
     hostname: master
     ports:
     - "4040:4040"
@@ -18,8 +20,8 @@ master:
     #mem_limit: 1024m
     command: bash /usr/local/spark/sbin/start-master.sh && ping localhost > /dev/null
 
-worker:
-  image: sequenceiq/spark:1.4.0
+  worker:
+    image: sequenceiq/spark:1.6.0
     links:
     - master:master
     expose: