The partition reassignment tool can be used to move some topics off of the current set of brokers to the newly added brokers. This is typically useful while expanding an existing cluster since it is easier to move entire topics to the new set of brokers, than moving one partition at a time. When used to do this, the user should provide a list of topics that should be moved to the new set of brokers and a target list of new brokers. The tool then evenly distributes all partitions for the given list of topics across the new set of brokers. During this move, the replication factor of the topic is kept constant. Effectively the replicas for all partitions for the input list of topics are moved from the old set of brokers to the newly added brokers.

For instance, the following example will move all partitions for topics foo1,foo2 to the new set of brokers 5,6. At the end of this move, all partitions for topics foo1 and foo2 will only exist on brokers 5,6.

Since the tool accepts the input list of topics as a json file, you first need to identify the topics you want to move and create the json file as follows:

1
2
3
4
5
> cat topics-to-move.json
{"topics": [{"topic": "foo1"},
            {"topic": "foo2"}],
"version":1
}

Once the json file is ready, use the partition reassignment tool to generate a candidate assignment:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
> bin/kafka-reassign-partitions.sh --zookeeper localhost:2181 --topics-to-move-json-file topics-to-move.json --broker-list "5,6" --generate
Current partition replica assignment
 
{"version":1,
"partitions":[{"topic":"foo1","partition":2,"replicas":[1,2]},
              {"topic":"foo1","partition":0,"replicas":[3,4]},
              {"topic":"foo2","partition":2,"replicas":[1,2]},
              {"topic":"foo2","partition":0,"replicas":[3,4]},
              {"topic":"foo1","partition":1,"replicas":[2,3]},
              {"topic":"foo2","partition":1,"replicas":[2,3]}]
}
 
Proposed partition reassignment configuration
 
{"version":1,
"partitions":[{"topic":"foo1","partition":2,"replicas":[5,6]},
              {"topic":"foo1","partition":0,"replicas":[5,6]},
              {"topic":"foo2","partition":2,"replicas":[5,6]},
              {"topic":"foo2","partition":0,"replicas":[5,6]},
              {"topic":"foo1","partition":1,"replicas":[5,6]},
              {"topic":"foo2","partition":1,"replicas":[5,6]}]
}

The tool generates a candidate assignment that will move all partitions from topics foo1,foo2 to brokers 5,6. Note, however, that at this point, the partition movement has not started, it merely tells you the current assignment and the proposed new assignment. The current assignment should be saved in case you want to rollback to it. The new assignment should be saved in a json file (e.g. expand-cluster-reassignment.json) to be input to the tool with the --execute option as follows:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
> bin/kafka-reassign-partitions.sh --zookeeper localhost:2181 --reassignment-json-file expand-cluster-reassignment.json --execute
Current partition replica assignment
 
{"version":1,
"partitions":[{"topic":"foo1","partition":2,"replicas":[1,2]},
              {"topic":"foo1","partition":0,"replicas":[3,4]},
              {"topic":"foo2","partition":2,"replicas":[1,2]},
              {"topic":"foo2","partition":0,"replicas":[3,4]},
              {"topic":"foo1","partition":1,"replicas":[2,3]},
              {"topic":"foo2","partition":1,"replicas":[2,3]}]
}
 
Save this to use as the --reassignment-json-file option during rollback
Successfully started reassignment of partitions
{"version":1,
"partitions":[{"topic":"foo1","partition":2,"replicas":[5,6]},
              {"topic":"foo1","partition":0,"replicas":[5,6]},
              {"topic":"foo2","partition":2,"replicas":[5,6]},
              {"topic":"foo2","partition":0,"replicas":[5,6]},
              {"topic":"foo1","partition":1,"replicas":[5,6]},
              {"topic":"foo2","partition":1,"replicas":[5,6]}]
}

Finally, the --verify option can be used with the tool to check the status of the partition reassignment. Note that the same expand-cluster-reassignment.json (used with the --execute option) should be used with the --verify option:

1
2
3
4
5
6
7
8
> bin/kafka-reassign-partitions.sh --zookeeper localhost:2181 --reassignment-json-file expand-cluster-reassignment.json --verify
Status of partition reassignment:
Reassignment of partition [foo1,0] completed successfully
Reassignment of partition [foo1,1] is in progress
Reassignment of partition [foo1,2] is in progress
Reassignment of partition [foo2,0] completed successfully
Reassignment of partition [foo2,1] completed successfully
Reassignment of partition [foo2,2] completed successfully

注意:

The partition reassignment tool does not have the ability to automatically generate a reassignment plan for decommissioning brokers yet. As such, the admin has to come up with a reassignment plan to move the replica for all partitions hosted on the broker to be decommissioned, to the rest of the brokers. This can be relatively tedious as the reassignment needs to ensure that all the replicas are not moved from the decommissioned broker to only one other broker. To make this process effortless, we plan to add tooling support for decommissioning brokers in the future.

Automatically migrating data to new machines kafka集群扩充迁移topic的更多相关文章

  1. Custom partition assignment and migration kafka集群扩充迁移指定partition

    The partition reassignment tool can also be used to selectively move replicas of a partition to a sp ...

  2. Zookeeper+Kafka集群部署(转)

    Zookeeper+Kafka集群部署 主机规划: 10.200.3.85  Kafka+ZooKeeper 10.200.3.86  Kafka+ZooKeeper 10.200.3.87  Kaf ...

  3. 《Apache kafka实战》读书笔记-管理Kafka集群安全之ACL篇

    <Apache kafka实战>读书笔记-管理Kafka集群安全之ACL篇 作者:尹正杰 版权声明:原创作品,谢绝转载!否则将追究法律责任. 想必大家能看到这篇博客的小伙伴,估计你对kaf ...

  4. kafka集群环境搭建(Linux)

    一.准备工作 centos6.8和jvm需要准备64位的,如果为32位,服务启动的时候报java.lang.OutOfMemoryError: Map failed 的错误. 链接:http://pa ...

  5. Zookeeper+Kafka集群部署

    Zookeeper+Kafka集群部署 主机规划: 10.200.3.85  Kafka+ZooKeeper 10.200.3.86  Kafka+ZooKeeper 10.200.3.87  Kaf ...

  6. CentOS6安装各种大数据软件 第五章:Kafka集群的配置

    相关文章链接 CentOS6安装各种大数据软件 第一章:各个软件版本介绍 CentOS6安装各种大数据软件 第二章:Linux各个软件启动命令 CentOS6安装各种大数据软件 第三章:Linux基础 ...

  7. kafka集群部署以及单机部署

      kafka单机部署 一.环境准备 当前环境:centos7.3一台软件版本:kafka_2.12部署目录:/usr/local/kafka启动端口:9092配置文件:/usr/local/kafk ...

  8. 六十一.常用组件 、 Kafka集群 、 Hadoop高可用

    1.Zookeeper安装搭建Zookeeper集群并查看各服务器的角色停止Leader并查看各服务器的角色 1.1 安装Zookeeper1)编辑/etc/hosts ,所有集群主机可以相互 pin ...

  9. ELK+Kafka集群日志分析系统

    ELK+Kafka集群分析系统部署 因为是自己本地写好的word文档复制进来的.格式有些出入还望体谅.如有错误请回复.谢谢! 一. 系统介绍 2 二. 版本说明 3 三. 服务部署 3 1) JDK部 ...

随机推荐

  1. C# 读写App.config配置文件

    一.C#项目中添加App.config配置文件 在控制台程序中,默认会有一个App.config配置文件,如果不小心删除掉,或者其他程序需要配置文件,可以通过添加得到. 添加步骤:右键项目名称,选择“ ...

  2. element框架中表格的筛选功能使用说明(转载)

    一.element框架中表格的筛选功能使用说明 转载:https://blog.csdn.net/liangxhblog/article/details/80513030 在element ui 框架 ...

  3. SqlHelper模板

    在实际开发中,我们不会直接使用拼写SQL语句的方法进行数据库操作,而是使用参数化的方法进行数据库操作,这样做的好处很多,不仅提高了程序的健壮性,同时也避免的SQL注入的问题.在这里,笔者为初学者提供一 ...

  4. javascript中Ajax的简单封装

    GET方式的在线:DEMO POST方式在线:DEMO // 1.封裝AJAX函數 function nativeAjax(option,success,error){ // 定义domain,方便环 ...

  5. iOS ----------字符串处理

    //一.NSString/*----------------创建字符串的方法----------------*/ //1.创建常量字符串.NSString *astring = @"This ...

  6. getCacheDir()、getFilesDir()、getExternalFilesDir()、getExternalCacheDir()

    一.getCacheDir.getCacheDir getCacheDir()方法用于获取/data/data//cache目录 getFilesDir()方法用于获取/data/data//file ...

  7. 跨域调用接口的方法之一:$.ajaxSetup()

    跨域查询接口的数据,之前在公司时有发生过,产生的原因是,本地请求的域名或IP地址不一致,解除方法,也是修改域名和IP地址.比如: 接口中的数据来自IP地址:192.168.1.23/get.php 如 ...

  8. spring学习总结——装配Bean学习一(自动装配)

    一.Spring配置的可选方案 Spring容器负责创建应用程序中的bean并通过DI来协调这些对象之间的关系.但是,作为开发人员,你需要告诉Spring要创建哪些bean并且如何将其装配在一起.当描 ...

  9. JS的判断字符/元素是否存在数组列表

    python有in操作, 可以很方便的用于判断元素是否存在指定列表. JS的in操作是对象, 用于判断指定的属性在指定对象中是否存在. propNameOrNumber in objectName i ...

  10. Django之--通过MVC架构的html模板展示Hello World!

    上一篇:Django之--网页展示Hello World! 初步说明了如何使用Django来显示hello world,本文略微进阶下使用html模板来展示hello world~ 首先在mysite ...