Kakfa分布式集群搭建

本位以最新版本kafka_2.11-0.10.1.0版本讲述分布式kafka集群环境的搭建过程。服务器列表：

172.31.10.1

172.31.10.2

172.31.10.3

1.下载kafka安装包

登录kafka官网http://kafka.apache.org/，

单击左侧“Download”按钮
选择对应的版本，版本2.11代表scala版本（kafka是由scala编写的）,0.10.1.0代表kafka的版本
在弹出的窗口中选择下载链接即可

Kakfa

2.下载zookeeper安装包

kafka整体架构如下：

Kakfa

而kafka集群通常会依赖zookeeper的命名服务，单机版的可以直接用kafka安装包的zookeeper，而通常生产环境为保证命名服务的可用性，一般会单独搭建zookeeper集群。服务器不足可以直接和kafka broker共用服务器，zookeeper命名服务队资源要求不高。

Kakfa

登录zookeeper官网http://www.apache.org/dyn/closer.cgi/zookeeper/，一路选择download下载即可，本文选择稳定版zookeeper-3.4.8

Kakfa

3.安装zookeeper集群

将安装包zookeeper-3.4.8.tar上传至服务器172.31.10.1，

解压，目录/opt/zookeeper/zookeeper-3.4.8

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tar -zxvf zookeeper-3.4.8.tar

配置，切换到conf目录，并更改dataDir和server.x

1 2	`cd /opt/zookeeper/zookeeper-3.4.8/conf` `mv zoo_sample.cfg zoo.cfg`

更改后的zoo.cfg配置如下：

# The number of milliseconds of each tick

tickTime=2000

# The number of ticks that the initial

# synchronization phase can take

initLimit=10

# The number of ticks that can pass between

# sending a request and getting an acknowledgement

syncLimit=5

# the directory where the snapshot is stored.

# do not use /tmp for storage, /tmp here is just

# example sakes.

dataDir=/var/logs/data/zookeeper

# the port at which the clients will connect

clientPort=2181

server.1=172.31.10.1:2888:3888

server.2=172.31.10.2:2888:3888

server.3=172.31.10.3:2888:3888

# the maximum number of client connections.

# increase this if you need to handle more clients

#maxClientCnxns=60

#

# Be sure to read the maintenance section of the

# administrator guide before turning on autopurge.

#

# http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance

#

# The number of snapshots to retain in dataDir

#autopurge.snapRetainCount=3

# Purge task interval in hours

# Set to "0" to disable auto purge feature

#autopurge.purgeInterval=1

其中dataDir为zookeeper目录，server.x为zookeeper服务器列表的地址和通信端口

远程复制到其他两台服务器，并在dataDir目录下创建myid文件，内容为server.x中的数字。本文设置如下：

#172.31.10.1执行

cd /var/logs/data/zookeeper

echo "1" > /var/logs/data/zookeeper/myid

#172.31.10.2执行

cd /var/logs/data/zookeeper

echo "2" > /var/logs/data/zookeeper/myid

#172.31.10.3执行

cd /var/logs/data/zookeeper

echo "3" > /var/logs/data/zookeeper/myid

启动zookeeper集群和验证

#在每台服务器上启动zookeeper

cd /opt/zookeeper/zookeeper-3.4.8/bin

/opt/zookeeper/zookeeper-3.4.8/bin/zkServer.sh start

#查看服务器上zookeeper节点角色

cd /opt/zookeeper/zookeeper-3.4.8/bin

/opt/zookeeper/zookeeper-3.4.8/bin/zkServer.sh status

4.安装kafka集群

解压，到/opt/kafka/kafka_2.11-0.10.1.0

1 2	`tar -zxvf kafka_2.11-0.10.1.0.tgz` `cd /opt/kafka/kafka_2.11-0.10.1.0`

更改conf/server.properties配置，主要是更改如下几项：

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broker.id=1

host.name=172.31.10.1

log.dirs=/var/logs/data/kafka

zookeeper.connect=172.31.10.1:2181,172.31.10.2:2181,172.31.10.2:2181/kafka

　　注意每台服务器上的broker.id均不同，需要保证整个集群中唯一性

　　更改后的server.properties如下：

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

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

broker.id=1

# The port the socket server listens on

port=9092

# Hostname the broker will bind to. If not set, the server will bind to all interfaces

host.name=172.31.10.1

# Switch to enable topic deletion or not, default value is false

#delete.topic.enable=true

############################# 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 = security_protocol://host_name:port

# EXAMPLE:

# listeners = PLAINTEXT://your.host.name:9092

#listeners=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

# The number of threads handling network requests

num.network.threads=3

# The number of threads doing 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

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

# A comma seperated list of directories under which to store log files

log.dirs=/var/logs/data/kafka

# 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

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

log.retention.hours=168

# 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.

#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=172.31.10.1:2181,172.31.10.2:2181,172.31.10.2:2181/kafka

# Timeout in ms for connecting to zookeeper

zookeeper.connection.timeout.ms=6000

同步到其他服务器，更改broker.id

kafka启动和验证

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cd /opt/kafka/kafka_2.11-0.10.1.0/bin

nohup /opt/kafka/kafka_2.11-0.10.1.0/bin/kafka-server-start.sh config/server.properties &

创建topic，如能成功创建topic则表示集群安装完成，也可以用jps命令查看kafka进程是否存在。

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/opt/kafka/kafka_2.11-0.10.1.0/bin/kafka-topics.sh --create --zookeeper 172.31.10.1:2181,172.31.10.2:2181,172.31.10.2:2181/kafka --replication-factor 3 --partitions 1 --topic test

至此，kafka分布式集群安装完成，后续将深入讲解kafka其他内容。

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Kakfa

Kakfa分布式集群搭建

1.下载kafka安装包

2.下载zookeeper安装包

3.安装zookeeper集群

4.安装kafka集群

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