Adding support to build cassandra-reaper docker images

README.md

@@ -346,6 +346,9 @@ To rebuild both the UI and Reaper :
 
 ```mvn clean package -Pbuild-ui```
 
+To build the docker image :
+
+```mvn clean package docker:build```
 
 ### Running Reaper
 

pom.xml

@@ -266,6 +266,25 @@
                             </execution>
                         </executions>
                     </plugin>
+                    <plugin>
+                        <groupId>com.spotify</groupId>
+                        <artifactId>docker-maven-plugin</artifactId>
+                        <version>0.4.13</version>
+                        <configuration>
+                            <imageName>cassandra-reaper</imageName>
+                            <dockerDirectory>src/main/docker</dockerDirectory>
+                            <buildArgs>
+                                <SHADED_JAR>cassandra-reaper-${project.version}.jar</SHADED_JAR>
+                            </buildArgs>
+                            <resources>
+                                <resource>
+                                    <targetPath>/</targetPath>
+                                    <directory>${project.build.directory}</directory>
+                                    <include>cassandra-reaper-${project.version}.jar</include>
+                                </resource>
+                            </resources>
+                        </configuration>
+                    </plugin>
                 </plugins>
             </build>
         </profile>

src/main/docker/Dockerfile

@@ -0,0 +1,57 @@
+FROM openjdk:8-jre-alpine
+
+ARG SHADED_JAR
+
+ENV REAPER_SEGMENT_COUNT=200 \
+    REAPER_REPAIR_PARALELLISM=DATACENTER_AWARE \
+    REAPER_REPAIR_INTENSITY=0.9 \
+    REAPER_SCHEDULE_DAYS_BETWEEN=7 \
+    REAPER_REPAIR_RUN_THREADS=15 \
+    REAPER_HANING_REPAIR_TIMEOUT_MINS=30 \
+    REAPER_STORAGE_TYPE=memory \
+    REAPER_ENABLE_CORS=true \
+    REAPER_INCREMENTAL_REPAIR=false \
+    REAPER_ALLOW_UNREACHABLE_NODES=false \
+    REAPER_ENABLE_DYNAMIC_SEEDS=true \
+    REAPER_AUTO_SCHEDULE_ENABLED=false \
+    REAPER_AUTO_SCHEDULE_INITIAL_DELAY_PERIOD=PT15S \
+    REAPER_AUTO_SCHEDULE_PERIOD_BETWEEN_POLLS=PT10M \
+    REAPER_AUTO_SCHEDULE_TIME_BETWEEN_FIRST_SCHEDULE=PT5M \
+    REAPER_AUTO_SCHEDULE_TIME_BETWEEN_FIRST_SCHEDULE=PT6H \
+    REAPER_AUTO_SCHEDULE_EXCLUDED_KEYSPACES="[]" \
+    REAPER_JMX_PORTS="{}" \
+    REAPER_LOGGING_ROOT_LEVEL=INFO \
+    REAPER_LOGGERS="{}" \
+    REAPER_LOGGING_FORMAT='"%-6level [%d] [%t] %logger{5} - %msg %n"' \
+    REAPER_APP_PORT=8080 \
+    REAPER_APP_BIND_HOST="0.0.0.0" \
+    REAPER_ADMIN_PORT=8081 \
+    REAPER_ADMIN_BIND_HOST="0.0.0.0" \
+    REAPER_CASS_CLUSTER_NAME="clutername" \
+    REAPER_CASS_CONTACT_POINTS="[]" \
+    REAPER_CASS_KEYSPACE="cassandra-reaper" \
+    REAPER_CASS_AUTH_ENABLED="false" \
+    REAPER_CASS_AUTH_USERNAME="cassandra" \
+    REAPER_CASS_AUTH_PASSWORD="cassandra" \
+    REAPER_DB_DRIVER_CLASS="org.h2.Driver" \
+    REAPER_DB_URL="jdbc:h2:/var/lib/cassandra-reaper/db;MODE=PostgreSQL" \
+    REAPER_DB_USERNAME="" \
+    REAPER_DB_PASSWORD="" \
+    JAVA_OPTS=""
+
+ADD cassandra-reaper.yml /etc/cassandra-reaper.yml
+ADD entrypoint.sh /usr/local/bin/entrypoint.sh
+ADD append-persistence.sh /usr/local/bin/append-persistence.sh
+RUN addgroup -S reaper && \
+    adduser -S reaper reaper && \
+    apk add --no-cache 'su-exec>=0.2' && \
+    mkdir -p /var/lib/cassandra-reaper && \
+    chown reaper:reaper /etc/cassandra-reaper.yml /var/lib/cassandra-reaper /usr/local/bin/entrypoint.sh /usr/local/bin/append-persistence.sh && \
+    chmod u+x /usr/local/bin/entrypoint.sh /usr/local/bin/append-persistence.sh
+
+VOLUME /var/lib/cassandra-reaper
+
+ADD ${SHADED_JAR} /usr/local/lib/cassandra-reaper.jar
+
+ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]
+CMD ["cassandra-reaper"]

src/main/docker/append-persistence.sh

@@ -0,0 +1,30 @@
+#!/bin/sh
+
+case ${REAPER_STORAGE_TYPE} in
+    "cassandra")
+cat <<EOT >> /etc/cassandra-reaper.yml
+cassandra:
+  clusterName: ${REAPER_CASS_CLUSTER_NAME}
+  contactPoints: ${REAPER_CASS_CONTACT_POINTS}
+  keyspace: ${REAPER_CASS_KEYSPACE}
+EOT
+
+if [ "true" = "${REAPER_CASS_AUTH_ENABLED}" ]; then
+cat <<EOT >> /etc/cassandra-reaper.yml
+  authProvider:
+    type: plainText
+    username: ${REAPER_CASS_AUTH_USERNAME}
+    password: ${REAPER_CASS_AUTH_PASSWORD}
+EOT
+fi
+    ;;
+    "database")
+cat <<EOT >> /etc/cassandra-reaper.yml
+database:
+  driverClass: ${REAPER_DB_DRIVER_CLASS}
+  url: ${REAPER_DB_URL}
+  user: ${REAPER_DB_USERNAME}
+  password: ${REAPER_DB_PASSWORD}
+EOT
+
+esac

src/main/docker/cassandra-reaper.yml

@@ -0,0 +1,43 @@
+
+segmentCount: ${REAPER_SEGMENT_COUNT}
+repairParallelism: ${REAPER_REPAIR_PARALELLISM}
+repairIntensity: ${REAPER_REPAIR_INTENSITY}
+scheduleDaysBetween: ${REAPER_SCHEDULE_DAYS_BETWEEN}
+repairRunThreadCount: ${REAPER_REPAIR_RUN_THREADS}
+hangingRepairTimeoutMins: ${REAPER_HANING_REPAIR_TIMEOUT_MINS}
+storageType: ${REAPER_STORAGE_TYPE}
+enableCrossOrigin: ${REAPER_ENABLE_CORS}
+incrementalRepair: ${REAPER_INCREMENTAL_REPAIR}
+allowUnreachableNodes: ${REAPER_ALLOW_UNREACHABLE_NODES}
+enableDynamicSeedList: ${REAPER_ENABLE_DYNAMIC_SEEDS}
+
+autoScheduling:
+  enabled: ${REAPER_AUTO_SCHEDULE_ENABLED}
+  initialDelayPeriod: ${REAPER_AUTO_SCHEDULE_INITIAL_DELAY_PERIOD}
+  periodBetweenPolls: ${REAPER_AUTO_SCHEDULE_PERIOD_BETWEEN_POLLS}
+  timeBeforeFirstSchedule: ${REAPER_AUTO_SCHEDULE_TIME_BETWEEN_FIRST_SCHEDULE}
+  scheduleSpreadPeriod: ${REAPER_AUTO_SCHEDULE_TIME_BETWEEN_FIRST_SCHEDULE}
+  excludedKeyspaces: ${REAPER_AUTO_SCHEDULE_EXCLUDED_KEYSPACES}
+
+jmxPorts: ${REAPER_JMX_PORTS}
+
+logging:
+  level: ${REAPER_LOGGING_ROOT_LEVEL}
+  loggers: ${REAPER_LOGGERS}
+  appenders:
+    - type: console
+      logFormat: ${REAPER_LOGGING_FORMAT}
+
+server:
+  type: default
+  applicationConnectors:
+    - type: http
+      port: ${REAPER_APP_PORT}
+      bindHost: ${REAPER_APP_BIND_HOST}
+  adminConnectors:
+    - type: http
+      port: ${REAPER_ADMIN_PORT}
+      bindHost: ${REAPER_ADMIN_BIND_HOST}
+  requestLog:
+    appenders: []
+

src/main/docker/entrypoint.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+if [ "$1" = 'cassandra-reaper' ]; then
+    su-exec reaper /usr/local/bin/append-persistence.sh
+    exec su-exec reaper java -jar ${JAVA_OPTS} \
+        /usr/local/lib/cassandra-reaper.jar server /etc/cassandra-reaper.yml
+fi
+
+exec "$@"

src/main/java/com/spotify/reaper/ReaperApplication.java

@@ -21,6 +21,8 @@
 import javax.servlet.DispatcherType;
 import javax.servlet.FilterRegistration;
 
+import io.dropwizard.configuration.EnvironmentVariableSubstitutor;
+import io.dropwizard.configuration.SubstitutingSourceProvider;
 import org.apache.cassandra.repair.RepairParallelism;
 import org.eclipse.jetty.servlets.CrossOriginFilter;
 import org.flywaydb.core.Flyway;
@@ -97,6 +99,11 @@ public String getName() {
   public void initialize(Bootstrap<ReaperApplicationConfiguration> bootstrap) {
     bootstrap.addBundle(new AssetsBundle("/assets/", "/webui", "index.html"));
     bootstrap.getObjectMapper().registerModule(new JavaTimeModule());
+
+    // enable using environment variables in yml files
+    final SubstitutingSourceProvider envSourceProvider = new SubstitutingSourceProvider(
+            bootstrap.getConfigurationSourceProvider(), new EnvironmentVariableSubstitutor(false));
+    bootstrap.setConfigurationSourceProvider(envSourceProvider);
   }
 
   @Override