搭建环境：
- JDK: java version 1.8.0_221
- zookeeper：zookeeper-3.5.2
- kafka: kafka-2.11-1.1.0
一、安装JDK
由于需要java环境，所以我们需先安装JDK
1、下载JDK并解压
mkdir /usr/java //在usr下创建java
cp jdk-8u221-linux-x64.tar.gz /usr/java/ //将下载好的JDK文件copy到/usr/java目录
cd /usr/java
tar -xzvf jdk-8u221-linux-x64.tar.gz //解压到当前目录
2、配置环境变量
vi /etc/profile
将下面内容添加到文件最后：
JAVA_HOME=/usr/java/jdk1.8.0_221 CLASSPATH=$JAVA_HOME/lib/ PATH=$PATH:$JAVA_HOME/bin export PATH JAVA_HOME CLASSPATH
保存后退出，并执行
source /etc/profile //使环境变量生效
3、查看安装情况
java -version
有时会遇到：
每次打开一个终端，都要输入source /etc/profile 环境变量才会生效！
解决方法：
vi ~/.bashrc
将 source /etc/profile 添加到bashrc文件中
二、安装kafka 1.1.0
kafka下载地址：http://kafka.apache.org/downloads
1、（这个安装是真滴难受，各种报错...）
下载好后，解压压缩包，并进入其目录
tar -xzvf kafka_2.11-1.1.0.tgz
cd kafka_2.11-1.1.0
2、这里，需先在一个终端启动zookeeper服务
bin/zookeeper-server-start.sh config/zookeeper.properties & //
我用的kafka自带的zookeeper-server-start.sh启动zookeeper服务，然后就各种报错启动不来kafka，最后我直接去官网上下载zookeeper，重新自己安装
安装方法可以参考文章：https://www.jianshu.com/p/7dcec9758614
3、然后打开另一个终端，再启动kafka服务
bin/kafka-server-start.sh config/server.properties
4、测试一下
创建名为“test”的 topic，并查看
linux-ym54:/usr/local/kafka/kafka_2.11-1.1.0 # bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic test
Created topic "test".
linux-ym54:/usr/local/kafka/kafka_2.11-1.1.0 # bin/kafka-topics.sh --list --zookeeper localhost:2181
test
发送消息：
bin/kafka-console-producer.sh --broker-list localhost:9092 --topic test
接收消息：
bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic test --from-beginning
有时会遇到：
- 在启动zookeeper服务时，会出现
INFO Closed socket connection for client /127.0.0.1:48452 which had sessionid 0x15698f5ac360001 (org.apache.zookeeper.server.NIOServerCnxn)
That is not an error. The topic details are fetched from Zookeeper. Hence the client (invoked by kafka-topics.sh) first connects to Zookeeper, then establishes a session, gets the data and then disconnects at the end. This is the expected behavior of any clients that will get some data from Zookeeper.
- 在启动kafka服务时，会出现
[2019-08-10 09:59:58,527] ERROR [KafkaServer id=0] Fatal error during KafkaServer startup. Prepare to shutdown (kafka.server.KafkaServer)
java.net.UnknownHostException: linux-ym54: linux-ym54: Name or service not known
at java.net.InetAddress.getLocalHost(InetAddress.java:1506)
at kafka.server.KafkaServer$$anonfun$3.apply(KafkaServer.scala:387)
at kafka.server.KafkaServer$$anonfun$3.apply(KafkaServer.scala:385)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:48)
at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
at scala.collection.AbstractTraversable.map(Traversable.scala:104)
at kafka.server.KafkaServer.createBrokerInfo(KafkaServer.scala:385)
at kafka.server.KafkaServer.startup(KafkaServer.scala:253)
at kafka.server.KafkaServerStartable.startup(KafkaServerStartable.scala:38)
at kafka.Kafka$.main(Kafka.scala:92)
at kafka.Kafka.main(Kafka.scala)
Caused by: java.net.UnknownHostException: linux-ym54: Name or service not known
at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:929)
at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1324)
at java.net.InetAddress.getLocalHost(InetAddress.java:1501)
... 13 more
修改 /etc/hosts文件，
把 “ your ip localhost ” 添加进去
三、kafka在windows中的安装
可以参考文章：https://blog.csdn.net/u012050154/article/details/76270655
有时会遇到：
xshell连接不上的问题！
- 检查ssh是否开启
service sshd status
- 检查22端口是否开放
- 最后检查发现是防火墙导致的
关闭防火墙，然后重启。
linux-ym54:/home/ilk/Desktop # systemctl list-dependencies |grep firewall ● ├─SuSEfirewall2.service ● ├─SuSEfirewall2_init.service linux-ym54:/home/ilk/Desktop # chkconfig SuSEfirewall2 off Removed symlink /etc/systemd/system/multi-user.target.wants/SuSEfirewall2.service. Removed symlink /etc/systemd/system/multi-user.target.wants/SuSEfirewall2_init.service. Removed symlink /etc/systemd/system/SuSEfirewall2_setup.serv