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This article mainly introduces how to build a Hadoop-zookeeper environment, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.

1. Install JDK8 before installing zookeeper:

Rpm-ivh jdk-8u65-linux-x64.rpm

1.1. Configure environment variables:

Vim / etc/profile

JAVA_HOME=/usr/java/jdk1.8.0_65

CLASSPATH=$JAVA_HOME/lib/tools.jar

PATH=$JAVA_HOME/bin:$PATH

Export JAVA_HOME CLASSPATH PATH

1.2.Configuring static IP address:

Vim / etc/sysconfig/network-scripts/ifcfg-eno16777736

1.3.Modification of mac address:

Vmware to view the virtual machine mac address:

Right-click-Settings-Network Adapter-Advanced-MAC address

Vim / etc/sysconfig/network-scripts/ifcfg-eno16777736

Add MACADDR=00:0C:29:36:97:20 (the mac address corresponding to the virtual machine)

Comment out the original HWADDR

: wq save exit.

Build a zk cluster:

Download address of zookeeper:

Http://www.apache.org/dyn/closer.cgi/zookeeper/

Download zookeeper to the local system:

Wget http://apache.fayea.com/zookeeper/stable/zookeeper-3.4.8.tar.gz

Pwd: view the full path of the current directory

1. Decompress: tar-zxvf zookeeper-3.4.8.tar.gz

Copy the extracted file to / usr/local/

Cp-r zookeeper-3.4.8 / usr/local/

2. Copy the sample file:

Cp / usr/local/zookeeper-3.4.8/conf/zoo_sample.cfg / usr/local/zookeeper-3.4.8/conf/zoo.cfg

3. Modify zoo.cfg:

Vim zoo.cfg

Modify the data storage directory dataDir to:

DataDir=/usr/local/zookeeper-3.4.8/data

Configure 3 zk servers:

Add:

Server.1=server1:2888:3888

Server.2=server2:2888:3888

Server.3=server3:2888:3888

4. Create a data folder:

Mkdir / usr/local/zookeeper-3.4.8/data

5. Create a myid file under the data directory:

Vi myid-- > content is 1

There is a signifier 1, which represents server.1 server

6. Send files to other machines:

Scp zookeeper:

-r: copy directory-Q: do not show transfer progress

Scp-r zookeeper-3.4.8 root@192.168.0.108:/usr/local/

Yes

Enter password

Scp-rq zookeeper-3.4.8/ root@192.168.0.109:/usr/local/

7. Modify the myid file: (all three servers need to be modified)

Vim myid

Or

Echo 2 > / usr/local/zookeeper-3.4.8/data/myid

Edit the "myid" file and enter the corresponding number on the corresponding IP machine. For example, on server1, the content of the "myid" file is 1 (the myid content of multiple hosts is different, just be consistent with the zoo.cfg configuration file (server.*)).

8. Start the execution of zk:

Cd / usr/local/

Zookeeper-3.4.8/bin/zkServer.sh start (three machines should be started at the same time)

9. Check the zk status:

Zookeeper-3.4.8/bin/zkServer.sh status

Zookeeper-3.4.8/bin/zkServer.sh stop (stop)

An error was reported when viewing status:

Error contacting service. It is probably not running

Modify the hostname of zoo.cfg to the corresponding IP address:

Server.1=192.168.0.107:2888:3888

Server.2=192.168.0.108:2888:3888

Server.3=192.168.0.109:2888:3888

10. Enter the zk client:

Enter the Cli client of zookeeper:

Zookeeper-3.4.8/bin/zkCli.sh

Similar to the linux command:

Ls /

Help command:

Help

Create a node:

Create / path data

Ls / path

Get node data information:

Get / path [represents nodes, each node stores information]

Delete a node:

Delete / path

Ls /

Exit:

Quit

Go to the user folder:

Cd ~

Thank you for reading this article carefully. I hope the article "how to build a Hadoop-zookeeper Environment" shared by the editor will be helpful to everyone. At the same time, I also hope that you will support us and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

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