Shulou(Shulou.com)06/02 Report--

In this issue, Xiaobian will bring you about how to build a configuration cluster mode in zookeeper. The article is rich in content and analyzed and described from a professional perspective. After reading this article, I hope you can gain something.

1. Install jdk1.8, if you don't know this, you can Baidu it is very simple

2. Official download address https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/

3. After decompression, configure the bin directory to the environment variable PATH (similar to java environment variable), and the configuration will take effect through source /etc/profile.

4. copy zoo_sample.cfg zoo.cfg, Generally modify the dataDir directory

End, let's start the cluster installation deployment

Step 1: Node Type Assignment

In order to achieve the effect, 1 leader, 1 follower, 1 observer are assigned (first configure 2 followers, and then change one of them to follower)

leader 192.168.134.137

follower 192.168.134.138

observer 192.168.134.139

Note: In order to facilitate testing, three firewalls were turned off in advance (systemctl stop firewall), and you can handle your own firewall according to the situation.

Step 2: Start configuring the leader node

1. Modify zoo.cfg to add (port 2181 used by zookeeper by default, refer to port configured by stand-alone)

#server.id=host:port:portserver.1=192.168.134.137:2182:3181server.2=192.168.134.138:2182:3181server.3=192.168.134.139:2182:3181

Description:

id value range: 1~255; id is used to identify the machine serial number in the cluster.

2181 is the port where zookeeper provides services;2182 is the communication interface between leader and follower; 3181 represents the port where leader elects

2. Create myid

Create a myid file under the dataDir directory of each server. The file contains one line of data. The data content is the number of server ID corresponding to each machine.

Step 3: Configure the follower, same as step 1, note that myid is different, then start the three nodes in turn, check the startup status through zkServer.sh status

At this point, complete 1 leader and 2 followers, then change one follower to observer, in the case of increasing the load does not affect the writing effect (observer purpose)

Modify the zoo.cfg configuration file

Add peerType=observer

server.3=192.168.134.139:2182:3181:observer

Modify three machines in turn, and then restart. Dynamic configuration modification is supported after 3.5.

The above is how to build a configuration cluster mode in zookeeper shared by everyone. If there is a similar doubt, please refer to the above analysis for understanding. If you want to know more about it, please pay attention to the industry information channel.

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