Undeprecated zookeeper

Dockerfile

@@ -1,25 +1,32 @@
-#FROM ubuntu:trusty
-#FROM ubuntu:16.04
-#FROM java:8
-FROM openjdk:8-alpine
+FROM java:8
 
 MAINTAINER Juergen Jakobitsch <[email protected]>
 
-#RUN apt-get update && apt-get install -y vim
+# Install utilities
+RUN DEBIAN_FRONTEND=noninteractive apt-get update && apt-get install -y netcat
 
-RUN apk add --update bash && rm -rf /var/cache/apk/*
+# Zookeeper version to be used
+ENV ZK_VERSION zookeeper-3.4.11
 
-ADD zookeeper-3.5.2-alpha.tar.gz /usr/local/apache-zookeeper/
+# Download distribution
+RUN wget -q http://ftp.halifax.rwth-aachen.de/apache/zookeeper/"$ZK_VERSION"/"$ZK_VERSION".tar.gz -O /tmp/"$ZK_VERSION".tar.gz \
+    && tar xfz /tmp/"$ZK_VERSION".tar.gz -C /opt \
+    && rm /tmp/"$ZK_VERSION".tar.gz
 
-RUN ln -s /usr/local/apache-zookeeper/zookeeper-3.5.2-alpha /usr/local/apache-zookeeper/current
+# The common installation dirname to use zookeeper
+RUN ln -s /opt/"$ZK_VERSION" /opt/zookeeper
 
-RUN rm -f /tmp/zookeeper-3.5.2-alpha.tar.gz
+# Define the run configuration
+RUN cd /opt/zookeeper/conf \
+    && cp -p zoo_sample.cfg zoo.cfg
 
-RUN ln -s /usr/local/apache-zookeeper/zookeeper-3.5.2-alpha /app
-RUN ln -s /usr/local/apache-zookeeper/zookeeper-3.5.2-alpha/conf /config
+EXPOSE 2181
 
-COPY zk-config /app/bin
-COPY startup /
-#COPY wait-for-step.sh /
-#COPY execute-step.sh /
-#COPY finish-step.sh /
+COPY wait-for-step.sh /
+COPY execute-step.sh /
+COPY finish-step.sh /
+
+COPY healthcheck /
+COPY zookeeper-startup.sh /
+
+CMD [ "./zookeeper-startup.sh" ]

README.md

@@ -1,8 +1,8 @@
 # Zookeeper Docker
 
 Versions used in this docker image:
-* Zookeeper Version: 3.5.2-alpha
-* Java 1.8.0_72
+* Zookeeper Version: 3.4.11
+* Java 1.8.x
 
 Image details:
 * Installation directory: /app (i.e: /usr/local/apache-zookeeper/current)

execute-step.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+if [[ $ENABLE_INIT_DAEMON = "true" ]]
+   then
+       echo "Execute step ${INIT_DAEMON_STEP} in pipeline"
+       while true; do
+	   sleep 5
+	   echo -n '.'
+	   string=$(curl -w "%{http_code}" -X PUT $INIT_DAEMON_BASE_URI/execute?step=$INIT_DAEMON_STEP -d "")
+	   [ "$string" = "204" ] && break
+       done
+       echo "Notified execution of step ${INIT_DAEMON_STEP}"
+fi

finish-step.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+if [[ $ENABLE_INIT_DAEMON = "true" ]]
+   then
+       echo "Finish step ${INIT_DAEMON_STEP} in pipeline"
+       while true; do
+	   sleep 5
+	   echo -n '.'
+	   string=$(curl -w "%{http_code}" -X PUT $INIT_DAEMON_BASE_URI/finish?step=$INIT_DAEMON_STEP -d "")
+	   [ "$string" = "204" ] && break
+       done
+       echo "Notified finish of step ${INIT_DAEMON_STEP}"
+fi

healthcheck

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+set -e
+
+export IMOK=$(echo ruok | nc localhost 2181)
+if [[ "$IMOK" == "imok" ]]; then
+    exit 0
+else
+    exit 1
+fi

wait-for-step.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+if [[ $ENABLE_INIT_DAEMON = "true" ]]
+   then
+       echo "Validating if step ${INIT_DAEMON_STEP} can start in pipeline"
+       while true; do
+	   sleep 5
+	   echo -n '.'
+	   string=$(curl -s $INIT_DAEMON_BASE_URI/canStart?step=$INIT_DAEMON_STEP)
+	   [ "$string" = "true" ] && break
+       done
+       echo "Can start step ${INIT_DAEMON_STEP}"
+fi

zookeeper-startup.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+set -e
+
+echo `date` $0
+
+/wait-for-step.sh
+/execute-step.sh
+
+if [[ $ENABLE_INIT_DAEMON = "true" ]] ;then
+    (
+        while ! ( /healthcheck ) ;do echo expect to become healthy; sleep 1; done
+        echo XXX $0 initialisation finished, service is healthy
+        /finish-step.sh
+    ) &
+fi
+
+echo `date` $0 : zkServer.sh start-foreground 
+exec /opt/zookeeper/bin/zkServer.sh start-foreground