kafka集群搭建
下面简单的介绍一下kafka的集群搭建,单个kafka的安装更简单,下面以集群搭建为例子。
我们设置并部署有三个节点的 kafka 集合体,必须在每个节点上遵循下面的步骤来启动 kafka 服务器,kafka集群需要依赖zookeeper集群,上一篇已经说道了zookeeper的搭建,方法请参考:http://www.cnblogs.com/chushiyaoyue/p/5615267.html
1.环境准备
- 测试服务器(2n+1)奇数台
192.168.181.128 centos6.4
192.168.181.129 centos6.4
192.168.181.130 centos6.4
- 下载kafka安装包
http://mirrors.tuna.tsinghua.edu.cn/apache/kafka/0.9.0.1/kafka_2.11-0.9.0.1.tgz
- 修改hosts文件
192.168.181.128 test1
192.168.181.129 test2
192.168.181.130 test3
- 安装jdk,解压安装文件,检查防火墙
2.设计安装目录
- 安装目录:/home/rtmap
- Datadir:/data/kafka/kafkalogs
3.修改配置文件
#进入config目录
cd /home/rtmap/kafka_2.11-0.9.0.0/config
#查看
[root@test1 config]# ll
总用量 64
-rw-r--r--. 1 root root 906 11月 21 2015 connect-console-sink.properties
-rw-r--r--. 1 root root 909 11月 21 2015 connect-console-source.properties
-rw-r--r--. 1 root root 2110 11月 21 2015 connect-distributed.properties
-rw-r--r--. 1 root root 922 11月 21 2015 connect-file-sink.properties
-rw-r--r--. 1 root root 920 11月 21 2015 connect-file-source.properties
-rw-r--r--. 1 root root 1074 11月 21 2015 connect-log4j.properties
-rw-r--r--. 1 root root 2055 11月 21 2015 connect-standalone.properties
-rw-r--r--. 1 root root 1199 11月 21 2015 consumer.properties
-rw-r--r--. 1 root root 4369 11月 21 2015 log4j.properties
-rw-r--r--. 1 root root 2228 11月 21 2015 producer.properties
-rw-r--r--. 1 root root 5675 3月 2 08:27 server.properties
-rw-r--r--. 1 root root 3325 11月 21 2015 test-log4j.properties
-rw-r--r--. 1 root root 1032 11月 21 2015 tools-log4j.properties
-rw-r--r--. 1 root root 1023 11月 21 2015 zookeeper.properties
主要关注:server.properties 这个文件即可,我们可以发现在目录下:
broker.id=0 #当前机器在集群中的唯一标识,和zookeeper的myid性质一样
port=9092 #当前kafka对外提供服务的端口默认是9092
host.name=192.168.181.128 #这个参数默认是关闭的,在0.8.1有个bug,DNS解析问题,失败率的问题。
num.network.threads=3 #这个是borker进行网络处理的线程数
num.io.threads=8 #这个是borker进行I/O处理的线程数
log.dirs=/data/kafka/kafkalogs/ #消息存放的目录,这个目录可以配置为“,”逗号分割的表达式,上面的num.io.threads要大于这个目录的个数这个目录,如果配置多个目录,新创建的topic他把消息持久化的地方是,当前以逗号分割的目录中,那个分区数最少就放那一个
socket.send.buffer.bytes=102400 #发送缓冲区buffer大小,数据不是一下子就发送的,先回存储到缓冲区了到达一定的大小后在发送,能提高性能
socket.receive.buffer.bytes=102400 #kafka接收缓冲区大小,当数据到达一定大小后在序列化到磁盘
socket.request.max.bytes=104857600 #这个参数是向kafka请求消息或者向kafka发送消息的请请求的最大数,这个值不能超过java的堆栈大小
num.partitions=1 #默认的分区数,一个topic默认1个分区数,一般建议等于集群主机数
log.retention.hours=168 #默认消息的最大持久化时间,168小时,7天
message.max.byte=5242880 #消息保存的最大值5M
default.replication.factor=2 #kafka保存消息的副本数,如果一个副本失效了,另一个还可以继续提供服务,建议 集群数n -1个副本
replica.fetch.max.bytes=5242880 #取消息的最大直接数
log.segment.bytes=1073741824 #这个参数是:因为kafka的消息是以追加的形式落地到文件,当超过这个值的时候,kafka会新起一个文件
log.retention.check.interval.ms=300000 #每隔300000毫秒去检查上面配置的log失效时间(log.retention.hours=168 ),到目录查看是否有过期的消息如果有,删除
log.cleaner.enable=false #是否启用log压缩,一般不用启用,启用的话可以提高性能
zookeeper.connect=192.168.181.128:2181,192.168.181.129:2181,192.168.181.130:218 #设置zookeeper的连接端口
实际修改内容:
#broker.id=0 每台服务器的broker.id都不能相同 #hostname
host.name=192.168.181.128 #在log.retention.hours=168 下面新增下面三项
message.max.byte=5242880
default.replication.factor=2
replica.fetch.max.bytes=5242880 #设置zookeeper的连接端口
zookeeper.connect=192.168.181.128:2181,192.168.181.129:2181,192.168.181.130:2181
4.启动kafka集群
1.启动服务
[root@test1 bin]# pwd
/home/rtmap/kafka_2.11-0.9.0.0/bin
[root@test1 bin]# ./kafka-server-start.sh -daemon ../config/server.properties
2.检查服务
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alt="" />
3.创建topic
#进入到kafka的bin目录下:
cd /home/rtmap/kafka_2.11-0.9.0.0/bin
#创建名为test123的topic
[root@test1 bin]# ./kafka-topics.sh --create --zookeeper 192.168.181.128:2181,192.168.181.129:2181,192.168.181.130:2181 --replication-factor 2 --partitions 3 --topic test123
Created topic "test123". #创建成功提示 #解释
--replication-factor 2 #复本两份
--partitions 1 #创建3个分区
--topic #主题为shuaige
4.检查创建的topic信息
[root@test1 bin]# ./kafka-topics.sh --describe --zookeeper 192.168.181.128:2181,192.168.181.129:2181,192.168.181.130:2181 --topic test123
Topic:test123 PartitionCount:3 ReplicationFactor:2 Configs:
Topic: test123 Partition: 0 Leader: 0 Replicas: 0,1 Isr: 0,1
Topic: test123 Partition: 1 Leader: 1 Replicas: 1,2 Isr: 1,2
Topic: test123 Partition: 2 Leader: 2 Replicas: 2,0 Isr: 2,0
5.创建一个生产者,生产一些数据
#创建一个生产者
./kafka-console-producer.sh --broker-list 192.168.181.128:9092 --topic test123
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" 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6.创建一个消费者,消费者消费生产者的数据
#创建一个生产者
./kafka-console-consumer.sh --zookeeper 192.168.181.128:2181 --topic test123 --from-beginning
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" alt="" />
到此如果没明显的报错说明集群正常,可以使用了!
7.日志说明
默认kafka的日志是保存在/home/rtmap/kafka_2.10-0.9.0.0/logs目录下的,这里说几个需要注意的日志
server.log #kafka的运行日志
state-change.log #kafka他是用zookeeper来保存状态,所以他可能会进行切换,切换的日志就保存在这里 controller.log #kafka选择一个节点作为“controller”,当发现有节点down掉的时候它负责在游泳分区的所有节点中选择新的leader,这使得Kafka可以批量的高效的管理所有分区节点的主从关系。如果controller down掉了,活着的节点中的一个会备切换为新的controller.