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This article introduces the relevant knowledge of "the detailed installation process of zookeeper". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

The user is hadoop and the installation directory is under / opt/app

Upload the installation file to / opt

Root user decompression

[root@master opt] $tar-zxvf zookeeper-3.4.7.tar.gz-C / opt/app/

Modify users and affiliate groups

[root@master opt] # chown-R hadoop:hadoop zookeeper-3.4.7

Create a data folder and modify the attribute group (and also on slave01 and slave02)

Mkdir / home/hadoop/app/zookeeper-3.4.7/tmp

Chown-R hadoop:hadoop / home/hadoop/app/zookeeper-3.4.7/tmp

Switch users and modify the file zoo.cfg

Su-hadoop

Mv zoo_sample.cfg zoo.cfg

# modify data folder customization

DataDir=/home/hadoop/app/zookeeper-3.4.7/tmp

# add Server

Server.1=master:2888:3888

Server.2=slave01:2889:3889

Server.3=slave02:2890:3890

Note: in pseudo distribution mode, the ports on the same machine should be distinguished.

It is best to configure all the ports at the back of the cluster.

Server.1=master:2888:3888

Server.2=slave01:2888:3888

Server.3=slave02:2888:3888

The only thing to note in the last few lines is that the number server.X corresponds to the number in data/myid. If you write 1Jing 2 server 3 in the myid files of 3 server, then each zoo.cfg in server is matched with server.1,server.2,server.3 OK. Because on the same machine, the two ports and three server connected behind should not be the same, otherwise the ports will conflict. The first port is used for the exchange of information among cluster members, and the second port is specially used for electing leader when the leader is hung up.

/ / server.X=A:B:C

Where X is a number, indicating which number this is server.

An is the IP address where the server is located.

B configure the port that the server uses to exchange messages with the leader in the cluster.

C configure the port used when electing leader

Enter the data folder to create a myid of 1

Cd / home/hadoop/app/zookeeper-3.4.7/tmp/

Echo 1 > / home/hadoop/app/zookeeper-3.4.7/tmp/myid (corresponding to X 1:1 server above)

Copy the configured zookeeper to another computer (slave01,slave02)

Scp-r zookeeper-3.4.7 hadoop@slave01:/opt/app (- r means recursion)

Scp-r zookeeper-3.4.7 hadoop@slave02:/opt/app

Modify an attribute group

[root@master opt] # chown-R hadoop:hadoop zookeeper-3.4.7

Note: modify the corresponding / home/hadoop/app/zookeeper-3.4.7/tmp/myid contents of slave01 and slave02

Slave01:

Echo 2 > / home/hadoop/app/zookeeper-3.4.7/tmp/myid

Slave02:

Echo 3 > / home/hadoop/app/zookeeper-3.4.7/tmp/myid

Configure environment variables

Sudo vi / etc/profile

Export ZOOKEEPER_HOME=/opt/app/zookeeper-3.4.7

Export PATH=$PATH:$ZOOKEEPER_HOME/bin

(the same operation is also done on master and slave02 nodes)

Start, execute on three machines

Bin/zkServer.sh start bin/zkServer.sh stop (off)

Judge whether the startup is successful or not

Jps

Or check the process-# start successfully if you have information

Ps-aux | grep 'zookeeper'

It's best to check the log # to see if the error is reported.

Tail-f-n 500 zookeeper.out

This is the end of the "detailed installation process of zookeeper". Thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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