docker/jvm/launch

#!/usr/bin/env bash
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# Override this section from the script to include the com.sun.management.jmxremote.rmi.port property.
if [ -z "$KAFKA_JMX_OPTS" ]; then
    export KAFKA_JMX_OPTS="-Dcom.sun.management.jmxremote=true -Dcom.sun.management.jmxremote.authenticate=false  -Dcom.sun.management.jmxremote.ssl=false "
fi

# The JMX client needs to be able to connect to java.rmi.server.hostname.
# The default for bridged n/w is the bridged IP so you will only be able to connect from another docker container.
# For host n/w, this is the IP that the hostname on the host resolves to.

# If you have more than one n/w configured, hostname -i gives you all the IPs,
# the default is to pick the first IP (or network).
export KAFKA_JMX_HOSTNAME=${KAFKA_JMX_HOSTNAME:-$(hostname -i | cut -d" " -f1)}

if [ "$KAFKA_JMX_PORT" ]; then
  # This ensures that the "if" section for JMX_PORT in kafka launch script does not trigger.
    export JMX_PORT=$KAFKA_JMX_PORT
    export KAFKA_JMX_OPTS="$KAFKA_JMX_OPTS -Djava.rmi.server.hostname=$KAFKA_JMX_HOSTNAME -Dcom.sun.management.jmxremote.local.only=false -Dcom.sun.management.jmxremote.rmi.port=$JMX_PORT -Dcom.sun.management.jmxremote.port=$JMX_PORT"
fi

# Make a temp env variable to store user provided performance otps
if [ -z "$KAFKA_JVM_PERFORMANCE_OPTS" ]; then
    export TEMP_KAFKA_JVM_PERFORMANCE_OPTS=""
else
    export TEMP_KAFKA_JVM_PERFORMANCE_OPTS="$KAFKA_JVM_PERFORMANCE_OPTS"
fi

# We will first use CDS for storage to format storage
export KAFKA_JVM_PERFORMANCE_OPTS="$KAFKA_JVM_PERFORMANCE_OPTS -XX:SharedArchiveFile=/opt/kafka/storage.jsa"

echo "===> Using provided cluster id $CLUSTER_ID ..."
# A bit of a hack to not error out if the storage is already formatted. Need storage-tool to support this
result=$(/opt/kafka/bin/kafka-storage.sh format --cluster-id=$CLUSTER_ID -c /opt/kafka/config/server.properties 2>&1) || \
    echo $result | grep -i "already formatted" || \
    { echo $result && (exit 1) }

# Using temp env variable to get rid of storage CDS command
export KAFKA_JVM_PERFORMANCE_OPTS="$TEMP_KAFKA_JVM_PERFORMANCE_OPTS"

# Now we will use CDS for kafka to start kafka server
export KAFKA_JVM_PERFORMANCE_OPTS="$KAFKA_JVM_PERFORMANCE_OPTS -XX:SharedArchiveFile=/opt/kafka/kafka.jsa"

# Start kafka broker
exec /opt/kafka/bin/kafka-server-start.sh /opt/kafka/config/server.properties