# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# see kafka.server.KafkaConfig for additional details and defaults

############################# Server Basics #############################

# The id of the broker. This must be set to a unique integer for each broker.
broker.id=23

# Below is the max possible user generated broker ids.
reserved.broker.max.id=255

# Below is enabled as true by default and this means any broker id beyond the max
# id would be generated by zookeeper
broker.id.generation.enable=false

############################# 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


########################### SSL Settings ########################
listeners=SSL://:9092
ssl.keystore.location=/var/private/ssl/kafka.server.keystore.jks
ssl.keystore.password=SomePassword
ssl.key.password=SomePassword
ssl.truststore.location=/var/private/ssl/kafka.server.truststore.jks
ssl.truststore.password=SomePassword
ssl.client.auth=required
security.inter.broker.protocol = SSL
advertised.listeners=SSL://192.168.2.23:9092
ssl.enabled.protocols=TLSv1.2,TLSv1.1,TLSv1

# 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

# 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

# The number of threads that the server uses for receiving requests from the network and sending responses to the network
num.network.threads=6

# 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


message.max.bytes=10000000


############################# Log Basics #############################

# A comma separated list of directories under which to store log files
#log.dirs=/tmp/kafka-logs
log.dirs=/var/kafka/kafka-logs

# 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

# 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

# Enable auto creation of topic on the server
auto.create.topics.enable=false

# Default replication factors for automatically created topics
default.replication.factor=3

# When a producer sets acks to "all" (or "-1"), min.insync.replicas specifies
# the minimum number of replicas that must acknowledge a write for the write to be
# considered successful.
min.insync.replicas=1

# Number of fetcher threads used to replicate messages from a source broker.
# Increasing this value can increase the degree of I/O parallelism in the follower
# broker
num.replica.fetchers=3

# This value should always be less than the replica.lag.time.max.ms at all
# times to prevent frequent shrinking of ISR for low throughput topics
replica.fetch.wait.max.ms=500

# If a follower hasn't sent any fetch requests or hasn't consumed up to the
# leaders log end offset for at least this time, the leader will remove the
# follower from ISR.
# TBD should we change this to 30000 since our min cadence is 30000?
replica.lag.time.max.ms=10000

# The socket timeout for network requests. Its value should be at least
# replica.fetch.wait.max.ms
replica.socket.timeout.ms=30000

# The configuration controls the maximum amount of time the client will wait for
# the response of a request. If the response is not received before the timeout
# elapses the client will resend the request if necessary or fail the request if
# retries are exhausted.
request.timeout.ms=30000

replica.fetch.max.bytes=10485760
replica.fetch.response.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.

# The topic replication factor will be set based on clustered or unclustered
# mode.
  
# The replication factor for the transaction topic (set higher to ensure
# availability). Internal topic creation will fail until the cluster size meets
# this replication factor requirement. default is 3
transaction.state.log.replication.factor=3

# Overridden min.insync.replicas config for the transaction topic. default is 2.
transaction.state.log.min.isr=1

# Internal topic creation will fail until the cluster size meets this
# replication factor requirement. default is 3
offsets.topic.replication.factor=3

# The number of partitions for the transaction topic (should not change after
# deployment). default is 50
transaction.state.log.num.partitions=25

# The number of partitions for the offset commit topic. default is 50
offsets.topic.num.partitions=25

# Offset commit will be delayed until all replicas for the offsets topic receive
# the commit or this timeout is reached
offsets.commit.timeout.ms=5000

############################# 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 excessive 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.minutes=25

# A size-based retention policy for logs. Segments are pruned from the log unless the remaining
# segments 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.

# Commentted the below so that default value of 3 seconds could take
# effect.
#group.initial.rebalance.delay.ms=0

group.min.session.timeout.ms=6000
group.max.session.timeout.ms=300000

# The timeout used to detect consumer failures when using Kafka's group
# management facility. can be in the range of min and max set above
session.timeout.ms=10000

# should be always < 1/3 of session.timeout.ms
heartbeat.interval.ms=3000

# The maximum number of records returned in a single call to poll()
max.poll.records=500

#A background thread checks and triggers leader balance if required at regular
#intervals
auto.leader.rebalance.enable=true

#The frequency with which the partition rebalance check is triggered by the
#controller
leader.imbalance.check.interval.seconds=300

#The ratio of leader imbalance allowed per broker. The controller would trigger
#a leader balance if it goes above this value per broker. The value is specified
#in percentage
leader.imbalance.per.broker.percentage=10

advertised.host.name=192.168.2.23

advertised.port=9092