Apache Kafka 简明教程

Apache Kafka - Installation Steps

以下是在您的机器上安装 Java 的步骤。

Following are the steps for installing Java on your machine.

Step 1 - Verifying Java Installation

希望您现在已经安装 Java，只需使用以下命令进行验证。

Hopefully you have already installed java on your machine right now, so you just verify it using the following command.

$ java -version

如果 Java 在您的设备上安装成功，您将看到所安装 Java 的版本。

If java is successfully installed on your machine, you could see the version of the installed Java.

Step 1.1 - Download JDK

如果没有下载 Java，请访问以下链接下载最新版本的 JDK，然后下载最新版本。

If Java is not downloaded, please download the latest version of JDK by visiting the following link and download latest version.

现在最新版本是 JDK 8u 60，文件是“jdk-8u60-linux-x64.tar.gz”。请在您的机器上下载此文件。

Now the latest version is JDK 8u 60 and the file is “jdk-8u60-linux-x64.tar.gz”. Please download the file on your machine.

Step 1.2 - Extract Files

一般来说，下载的文件都存储在下载文件夹中，验证并使用以下命令提取 tar 设置。

Generally, files being downloaded are stored in the downloads folder, verify it and extract the tar setup using the following commands.

$ cd /go/to/download/path
$ tar -zxf jdk-8u60-linux-x64.gz

Step 1.3 - Move to Opt Directory

为了让所有使用者都能使用 java，将提取的 java 内容移动到 usr/local/java/ 文件夹中。

To make java available to all users, move the extracted java content to usr/local/java/ folder.

$ su
password: (type password of root user)
$ mkdir /opt/jdk
$ mv jdk-1.8.0_60 /opt/jdk/

Step 1.4 - Set path

若要设置 path 及 JAVA_HOME 变量，请将以下命令添加到 ~/.bashrc 文件中。

To set path and JAVA_HOME variables, add the following commands to ~/.bashrc file.

export JAVA_HOME =/usr/jdk/jdk-1.8.0_60
export PATH=$PATH:$JAVA_HOME/bin

现在，将所有变更应用到当前运行系统中。

Now apply all the changes into current running system.

$ source ~/.bashrc

Step 1.5 - Java Alternatives

使用以下命令更改 Java 备用项。

Use the following command to change Java Alternatives.

update-alternatives --install /usr/bin/java java /opt/jdk/jdk1.8.0_60/bin/java 100

Step 1.6 − 现在使用步骤 1 中说明的验证命令 (java -version) 验证 java。

Step 1.6 − Now verify java using verification command (java -version) explained in Step 1.

Step 2 - ZooKeeper Framework Installation

Step 2.1 - Download ZooKeeper

要将 ZooKeeper 框架安装到您的计算机上，请访问以下链接并下载 ZooKeeper 的最新版本。

To install ZooKeeper framework on your machine, visit the following link and download the latest version of ZooKeeper.

截至目前，ZooKeeper 的最新版本是 3.4.6 (ZooKeeper-3.4.6.tar.gz)。

As of now, latest version of ZooKeeper is 3.4.6 (ZooKeeper-3.4.6.tar.gz).

Step 2.2 - Extract tar file

使用以下命令解压 tar 文件

Extract tar file using the following command

$ cd opt/
$ tar -zxf zookeeper-3.4.6.tar.gz
$ cd zookeeper-3.4.6
$ mkdir data

Step 2.3 - Create Configuration File

使用命令 vi "conf/zoo.cfg" 打开名为 conf/zoo.cfg 的配置文件，并将所有以下参数设置为起点。

Open Configuration File named conf/zoo.cfg using the command vi “conf/zoo.cfg” and all the following parameters to set as starting point.

$ vi conf/zoo.cfg
tickTime=2000
dataDir=/path/to/zookeeper/data
clientPort=2181
initLimit=5
syncLimit=2

配置文件成功保存并返回到终端后，您就可以启动 zookeeper 服务器。

Once the configuration file has been saved successfully and return to terminal again, you can start the zookeeper server.

Step 2.4 - Start ZooKeeper Server

$ bin/zkServer.sh start

执行此命令后，您将得到以下所示的响应 −

After executing this command, you will get a response as shown below −

$ JMX enabled by default
$ Using config: /Users/../zookeeper-3.4.6/bin/../conf/zoo.cfg
$ Starting zookeeper ... STARTED

Step 2.5 - Start CLI

$ bin/zkCli.sh

输入上述命令之后，您将连接到 zookeeper 服务器，并将得到以下响应。

After typing the above command, you will be connected to the zookeeper server and will get the below response.

Connecting to localhost:2181
................
................
................
Welcome to ZooKeeper!
................
................
WATCHER::
WatchedEvent state:SyncConnected type: None path:null
[zk: localhost:2181(CONNECTED) 0]

Step 2.6 - Stop Zookeeper Server

连接服务器并执行所有操作之后，您可以使用以下命令停止 zookeeper 服务器 −

After connecting the server and performing all the operations, you can stop the zookeeper server with the following command −

$ bin/zkServer.sh stop

现在您已成功在自己的计算机上安装 Java 和 ZooKeeper。让我们看看安装 Apache Kafka 的步骤。

Now you have successfully installed Java and ZooKeeper on your machine. Let us see the steps to install Apache Kafka.

Step 3 - Apache Kafka Installation

让我们继续执行以下步骤以在您的计算机上安装 Kafka。

Let us continue with the following steps to install Kafka on your machine.

Step 3.1 - Download Kafka

要将 Kafka 服务器安装到计算机上，请点击以下链接 −

To install Kafka on your machine, click on the below link −

现在，最新版本，即 – kafka_2.11_0.9.0.0.tgz 将下载到您的计算机上。

Now the latest version i.e., – kafka_2.11_0.9.0.0.tgz will be downloaded onto your machine.

Step 3.2 - Extract the tar file

使用以下命令解压 tar 文件 −

Extract the tar file using the following command −

$ cd opt/
$ tar -zxf kafka_2.11.0.9.0.0 tar.gz
$ cd kafka_2.11.0.9.0.0

现在您已在自己的计算机上下载了 Kafka 的最新版本。

Now you have downloaded the latest version of Kafka on your machine.

Step 3.3 - Start Server

您可以使用以下命令启动服务器 −

You can start the server by giving the following command −

$ bin/kafka-server-start.sh config/server.properties

服务器启动后，您将在屏幕上看到以下响应 −

After the server starts, you would see the below response on your screen −

$ bin/kafka-server-start.sh config/server.properties
[2016-01-02 15:37:30,410] INFO KafkaConfig values:
request.timeout.ms = 30000
log.roll.hours = 168
inter.broker.protocol.version = 0.9.0.X
log.preallocate = false
security.inter.broker.protocol = PLAINTEXT
…………………………………………….
…………………………………………….

Step 4 - Stop the Server

执行所有操作之后，您可以使用以下命令停止服务器 −

After performing all the operations, you can stop the server using the following command −

$ bin/kafka-server-stop.sh config/server.properties

我们已经讨论了 Kafka 安装，在下一章中，我们可以了解如何对 Kafka 执行基本操作。

Now that we have already discussed the Kafka installation, we can learn how to perform basic operations on Kafka in the next chapter.