kind: ConfigMap metadata: name: broker-config namespace: kafka apiVersion: v1 data: init.sh: |- #!/bin/bash set -x KAFKA_BROKER_ID=${HOSTNAME##*-} sed -i "s/#init#broker.id=#init#/broker.id=$KAFKA_BROKER_ID/" /etc/kafka/server.properties LABELS="kafka-broker-id=$KAFKA_BROKER_ID" ANNOTATIONS="" hash kubectl 2>/dev/null || { sed -i "s/#init#broker.rack=#init#/#init#broker.rack=# kubectl not found in path/" /etc/kafka/server.properties } && { ZONE=$(kubectl get node "$NODE_NAME" -o=go-template='{{index .metadata.labels "failure-domain.beta.kubernetes.io/zone"}}') if [ $? -ne 0 ]; then sed -i "s/#init#broker.rack=#init#/#init#broker.rack=# zone lookup failed, see -c init-config logs/" /etc/kafka/server.properties elif [ "x$ZONE" == "x" ]; then sed -i "s/#init#broker.rack=#init#/#init#broker.rack=# zone label not found for node $NODE_NAME/" /etc/kafka/server.properties else sed -i "s/#init#broker.rack=#init#/broker.rack=$ZONE/" /etc/kafka/server.properties LABELS="$LABELS kafka-broker-rack=$ZONE" fi OUTSIDE_HOST=$(kubectl get node "$NODE_NAME" -o jsonpath='{.status.addresses[?(@.type=="InternalIP")].address}') if [ $? -ne 0 ]; then echo "Outside (i.e. cluster-external access) host lookup command failed" else OUTSIDE_PORT=3240${KAFKA_BROKER_ID} sed -i "s|#init#advertised.listeners=OUTSIDE://#init#|advertised.listeners=OUTSIDE://${OUTSIDE_HOST}:${OUTSIDE_PORT}|" /etc/kafka/server.properties ANNOTATIONS="$ANNOTATIONS kafka-listener-outside-host=$OUTSIDE_HOST kafka-listener-outside-port=$OUTSIDE_PORT" fi if [ ! -z "$LABELS" ]; then kubectl -n $POD_NAMESPACE label pod $POD_NAME $LABELS || echo "Failed to label $POD_NAMESPACE.$POD_NAME - RBAC issue?" fi if [ ! -z "$ANNOTATIONS" ]; then kubectl -n $POD_NAMESPACE annotate pod $POD_NAME $ANNOTATIONS || echo "Failed to annotate $POD_NAMESPACE.$POD_NAME - RBAC issue?" fi } server.properties: |- ############################# Log Basics ############################# # A comma seperated list of directories under which to store log files # Overrides log.dir log.dirs=/var/lib/kafka/data/topics # The default number of log partitions per topic. More partitions allow greater # parallelism for consumption, but this will also result in more files across # the brokers. num.partitions=1 default.replication.factor=3 min.insync.replicas=2 auto.create.topics.enable=true # The number of threads per data directory to be used for log recovery at startup and flushing at shutdown. # This value is recommended to be increased for installations with data dirs located in RAID array. num.recovery.threads.per.data.dir=1 ############################# Server Basics ############################# # The id of the broker. This must be set to a unique integer for each broker. #init#broker.id=#init# #init#broker.rack=#init# ############################# Socket Server Settings ############################# # The address the socket server listens on. It will get the value returned from # java.net.InetAddress.getCanonicalHostName() if not configured. # FORMAT: # listeners = listener_name://host_name:port # EXAMPLE: # listeners = PLAINTEXT://your.host.name:9092 #listeners=PLAINTEXT://:9092 listeners=OUTSIDE://:9094,PLAINTEXT://:9092 # Hostname and port the broker will advertise to producers and consumers. If not set, # it uses the value for "listeners" if configured. Otherwise, it will use the value # returned from java.net.InetAddress.getCanonicalHostName(). #advertised.listeners=PLAINTEXT://your.host.name:9092 #init#advertised.listeners=OUTSIDE://#init#,PLAINTEXT://:9092 # Maps listener names to security protocols, the default is for them to be the same. See the config documentation for more details #listener.security.protocol.map=PLAINTEXT:PLAINTEXT,SSL:SSL,SASL_PLAINTEXT:SASL_PLAINTEXT,SASL_SSL:SASL_SSL listener.security.protocol.map=PLAINTEXT:PLAINTEXT,SSL:SSL,SASL_PLAINTEXT:SASL_PLAINTEXT,SASL_SSL:SASL_SSL,OUTSIDE:PLAINTEXT inter.broker.listener.name=PLAINTEXT # The number of threads that the server uses for receiving requests from the network and sending responses to the network num.network.threads=3 # The number of threads that the server uses for processing requests, which may include disk I/O num.io.threads=8 # The send buffer (SO_SNDBUF) used by the socket server socket.send.buffer.bytes=102400 # The receive buffer (SO_RCVBUF) used by the socket server socket.receive.buffer.bytes=102400 # The maximum size of a request that the socket server will accept (protection against OOM) socket.request.max.bytes=104857600 ############################# Internal Topic Settings ############################# # The replication factor for the group metadata internal topics "__consumer_offsets" and "__transaction_state" # For anything other than development testing, a value greater than 1 is recommended for to ensure availability such as 3. #offsets.topic.replication.factor=1 #transaction.state.log.replication.factor=1 #transaction.state.log.min.isr=1 ############################# Log Flush Policy ############################# # Messages are immediately written to the filesystem but by default we only fsync() to sync # the OS cache lazily. The following configurations control the flush of data to disk. # There are a few important trade-offs here: # 1. Durability: Unflushed data may be lost if you are not using replication. # 2. Latency: Very large flush intervals may lead to latency spikes when the flush does occur as there will be a lot of data to flush. # 3. Throughput: The flush is generally the most expensive operation, and a small flush interval may lead to exceessive seeks. # The settings below allow one to configure the flush policy to flush data after a period of time or # every N messages (or both). This can be done globally and overridden on a per-topic basis. # The number of messages to accept before forcing a flush of data to disk #log.flush.interval.messages=10000 # The maximum amount of time a message can sit in a log before we force a flush #log.flush.interval.ms=1000 ############################# Log Retention Policy ############################# # The following configurations control the disposal of log segments. The policy can # be set to delete segments after a period of time, or after a given size has accumulated. # A segment will be deleted whenever *either* of these criteria are met. Deletion always happens # from the end of the log. # The minimum age of a log file to be eligible for deletion due to age log.retention.hours=-1 # A size-based retention policy for logs. Segments are pruned from the log as long as the remaining # segments don't drop below log.retention.bytes. Functions independently of log.retention.hours. #log.retention.bytes=1073741824 # The maximum size of a log segment file. When this size is reached a new log segment will be created. log.segment.bytes=1073741824 # The interval at which log segments are checked to see if they can be deleted according # to the retention policies log.retention.check.interval.ms=300000 ############################# Zookeeper ############################# # Zookeeper connection string (see zookeeper docs for details). # This is a comma separated host:port pairs, each corresponding to a zk # server. e.g. "127.0.0.1:3000,127.0.0.1:3001,127.0.0.1:3002". # You can also append an optional chroot string to the urls to specify the # root directory for all kafka znodes. zookeeper.connect=zookeeper:2181 # Timeout in ms for connecting to zookeeper zookeeper.connection.timeout.ms=6000 ############################# Group Coordinator Settings ############################# # The following configuration specifies the time, in milliseconds, that the GroupCoordinator will delay the initial consumer rebalance. # The rebalance will be further delayed by the value of group.initial.rebalance.delay.ms as new members join the group, up to a maximum of max.poll.interval.ms. # The default value for this is 3 seconds. # We override this to 0 here as it makes for a better out-of-the-box experience for development and testing. # However, in production environments the default value of 3 seconds is more suitable as this will help to avoid unnecessary, and potentially expensive, rebalances during application startup. group.initial.rebalance.delay.ms=0 log4j.properties: |- # Unspecified loggers and loggers with additivity=true output to server.log and stdout # Note that INFO only applies to unspecified loggers, the log level of the child logger is used otherwise log4j.rootLogger=INFO, stdout log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=[%d] %p %m (%c)%n log4j.appender.kafkaAppender=org.apache.log4j.DailyRollingFileAppender log4j.appender.kafkaAppender.DatePattern='.'yyyy-MM-dd-HH log4j.appender.kafkaAppender.File=${kafka.logs.dir}/server.log log4j.appender.kafkaAppender.layout=org.apache.log4j.PatternLayout log4j.appender.kafkaAppender.layout.ConversionPattern=[%d] %p %m (%c)%n log4j.appender.stateChangeAppender=org.apache.log4j.DailyRollingFileAppender log4j.appender.stateChangeAppender.DatePattern='.'yyyy-MM-dd-HH log4j.appender.stateChangeAppender.File=${kafka.logs.dir}/state-change.log log4j.appender.stateChangeAppender.layout=org.apache.log4j.PatternLayout log4j.appender.stateChangeAppender.layout.ConversionPattern=[%d] %p %m (%c)%n log4j.appender.requestAppender=org.apache.log4j.DailyRollingFileAppender log4j.appender.requestAppender.DatePattern='.'yyyy-MM-dd-HH log4j.appender.requestAppender.File=${kafka.logs.dir}/kafka-request.log log4j.appender.requestAppender.layout=org.apache.log4j.PatternLayout log4j.appender.requestAppender.layout.ConversionPattern=[%d] %p %m (%c)%n log4j.appender.cleanerAppender=org.apache.log4j.DailyRollingFileAppender log4j.appender.cleanerAppender.DatePattern='.'yyyy-MM-dd-HH log4j.appender.cleanerAppender.File=${kafka.logs.dir}/log-cleaner.log log4j.appender.cleanerAppender.layout=org.apache.log4j.PatternLayout log4j.appender.cleanerAppender.layout.ConversionPattern=[%d] %p %m (%c)%n log4j.appender.controllerAppender=org.apache.log4j.DailyRollingFileAppender log4j.appender.controllerAppender.DatePattern='.'yyyy-MM-dd-HH log4j.appender.controllerAppender.File=${kafka.logs.dir}/controller.log log4j.appender.controllerAppender.layout=org.apache.log4j.PatternLayout log4j.appender.controllerAppender.layout.ConversionPattern=[%d] %p %m (%c)%n log4j.appender.authorizerAppender=org.apache.log4j.DailyRollingFileAppender log4j.appender.authorizerAppender.DatePattern='.'yyyy-MM-dd-HH log4j.appender.authorizerAppender.File=${kafka.logs.dir}/kafka-authorizer.log log4j.appender.authorizerAppender.layout=org.apache.log4j.PatternLayout log4j.appender.authorizerAppender.layout.ConversionPattern=[%d] %p %m (%c)%n # Change the two lines below to adjust ZK client logging log4j.logger.org.I0Itec.zkclient.ZkClient=INFO log4j.logger.org.apache.zookeeper=INFO # Change the two lines below to adjust the general broker logging level (output to server.log and stdout) log4j.logger.kafka=INFO log4j.logger.org.apache.kafka=INFO # Change to DEBUG or TRACE to enable request logging log4j.logger.kafka.request.logger=WARN, requestAppender log4j.additivity.kafka.request.logger=false # Uncomment the lines below and change log4j.logger.kafka.network.RequestChannel$ to TRACE for additional output # related to the handling of requests #log4j.logger.kafka.network.Processor=TRACE, requestAppender #log4j.logger.kafka.server.KafkaApis=TRACE, requestAppender #log4j.additivity.kafka.server.KafkaApis=false log4j.logger.kafka.network.RequestChannel$=WARN, requestAppender log4j.additivity.kafka.network.RequestChannel$=false log4j.logger.kafka.controller=TRACE, controllerAppender log4j.additivity.kafka.controller=false log4j.logger.kafka.log.LogCleaner=INFO, cleanerAppender log4j.additivity.kafka.log.LogCleaner=false log4j.logger.state.change.logger=TRACE, stateChangeAppender log4j.additivity.state.change.logger=false # Change to DEBUG to enable audit log for the authorizer log4j.logger.kafka.authorizer.logger=WARN, authorizerAppender log4j.additivity.kafka.authorizer.logger=false