Enable use of docker-entrypoint.sh (#216)

Author: vjkoskela

pom.xml

@@ -18,7 +18,7 @@
   <parent>
     <groupId>com.arpnetworking.build</groupId>
     <artifactId>arpnetworking-parent-pom</artifactId>
-    <version>2.0.6</version>
+    <version>2.0.7</version>
     <relativePath />
   </parent>
 
@@ -463,6 +463,10 @@
                 <env>
                   <JAVA_OPTS>${debugJavaOptions}</JAVA_OPTS>
                   <KAFKA_SOURCE_BOOTSTRAP_HOST>kafka</KAFKA_SOURCE_BOOTSTRAP_HOST>
+                  <!-- TODO(ville): Obtain these from the current user! -->
+                  <!-- Ref: https://github.com/rynr/user-id-maven-plugin -->
+                  <KDB_UID>1000</KDB_UID>
+                  <KDB_GID>1000</KDB_GID>
                 </env>
                 <volumes>
                   <bind>

src/main/assembly/docker.xml

@@ -46,6 +46,14 @@
         <include>mad</include>
       </includes>
     </fileSet>
+    <fileSet>
+      <directory>${buildDirectory}</directory>
+      <outputDirectory>bin</outputDirectory>
+      <fileMode>0755</fileMode>
+      <includes>
+        <include>docker-entrypoint.sh</include>
+      </includes>
+    </fileSet>
     <fileSet>
       <directory>${buildDirectory}/appassembler/lib</directory>
       <outputDirectory>lib</outputDirectory>

src/main/docker/mad/Dockerfile

@@ -12,22 +12,26 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM openjdk:8u151-jre-alpine
+FROM openjdk:8u212-jre-alpine
 
 MAINTAINER arpnetworking
 
 EXPOSE 7090
 WORKDIR /opt/mad
 
 # Configuration
+ENV MAD_USER="mad"
+ENV MAD_UID=1000
+ENV MAD_GID=1000
 ENV JVM_XMS="64m"
 ENV JVM_XMX="1024m"
 ENV LOGBACK_CONFIG="-Dlogback.configurationFile=/opt/mad/config/logback.xml"
 ENV MAD_CONFIG="/opt/mad/config/config.conf"
 ENV JAVA_OPTS=""
 
 # Build
-RUN mkdir -p /opt/mad/lib/ext && \
+RUN apk add --no-cache su-exec && \
+    mkdir -p /opt/mad/lib/ext && \
     mkdir -p /opt/mad/logs && \
     mkdir -p /opt/mad/config/pipelines
 ADD deps /opt/mad/lib/
@@ -36,7 +40,19 @@ ADD config /opt/mad/config/
 ADD lib /opt/mad/lib/
 
 # Entry point
-ENTRYPOINT [ \
+ENTRYPOINT [ "/opt/mad/bin/docker-entrypoint.sh" ]
+
+# Default arguments
+CMD [ \
+    "-n", \
+    "${MAD_USER}", \
+    "-u", \
+    "${MAD_UID}", \
+    "-g", \
+    "${MAD_GID}", \
+    "-d", \
+    "/opt/mad", \
+    "--", \
     "/opt/mad/bin/mad", \
     "${LOGBACK_CONFIG}", \
     "-XX:+HeapDumpOnOutOfMemoryError", \