Configuration of ZooKeeper
Installation of ZooKeeper
Download ZooKeeper
wget -P /export/software/ https://repo.huaweicloud.com/apache/zookeeper/zookeeper-3.8.5/apache-zookeeper-3.8.5-bin.tar.gzInstall ZooKeeper
tar -zxvf /export/software/apache-zookeeper-3.8.5-bin.tar.gz -C /export/servers/
cd /export/servers/
mv /export/servers/apache-zookeeper-3.8.5-bin /export/servers/zookeeperConfigure environment variables
sudo vim /etc/profileAdd the following configuration to the end of the file
export ZOOKEEPER_HOME=/export/servers/zookeeper
export PATH=$PATH:$ZOOKEEPER_HOME/bin
Reload environment variables
source /etc/profileedit the configuration file
cd /export/servers/zookeeper/confCopy the template into a formal configuration file
sudo cp /export/servers/zookeeper/conf/zoo_sample.cfg /export/servers/zookeeper/conf/zoo.cfg
sudo vim zoo.cfgthen enterggdG(Delete all content, strictly follow case), enter the following configuration
# 数据同步的基本时间单位（毫秒），默认2000
tickTime=2000
# follower初始化连接到leader的最大心跳数（tickTime的倍数）
initLimit=10
# follower与leader之间发送消息的最大心跳数（超过则认为连接失效）
syncLimit=5
# ZooKeeper数据存储目录（需与HBase的hbase.zookeeper.property.dataDir一致）
dataDir=/export/servers/zookeeper/data
# 客户端连接ZooKeeper的端口（默认2181，HBase会通过此端口连接）
clientPort=2181
# 集群节点配置（格式：server.编号=主机名:通信端口:选举端口）
# 编号需与每个节点的myid文件内容一致
server.1=hadoop01:2888:3888
server.2=hadoop02:2888:3888
server.3=hadoop03:2888:3888
# 允许客户端连接的最大数量（默认60，按需调整）
maxClientCnxns=60
# 自动清理事务日志的时间（小时），默认0表示不自动清理
autopurge.purgeInterval=1
Create a data directory on hadoop01 and write myid
mkdir -p /export/servers/zookeeper/data
sudo vim /export/servers/zookeeper/data/myidWrite the following
1
Distribution of ZooKeeper
Distribution of environmental variables
scp /etc/profile hadoop02:/tmp/profile
ssh hadoop02 "sudo cp /tmp/profile /etc/profile && sudo rm /tmp/profile"
scp /etc/profile hadoop03:/tmp/profile
ssh hadoop03 "sudo cp /tmp/profile /etc/profile && sudo rm /tmp/profile"Distribution of ZooKeeper
scp -r /export/servers/zookeeper hadoop02:/tmp/
ssh hadoop02 "sudo cp -r /tmp/zookeeper/ /export/servers/ && sudo rm -rf /tmp/zookeeper"
scp -r /export/servers/zookeeper hadoop03:/tmp/
ssh hadoop03 "sudo cp -r /tmp/zookeeper/ /export/servers/ && sudo rm -rf /tmp/zookeeper"Edit the myids of the other 2 servers separately
Enter hadoop02:
sudo vim /export/servers/zookeeper/data/myid
Go to hadoop03
sudo vim /export/servers/zookeeper/data/myid
Reload environment variables
ssh hadoop02 "bash -c 'source /etc/profile'"
ssh hadoop03 "bash -c 'source /etc/profile'"Operation of ZooKeeper
Check whether the port is occupied
sudo netstat -tunlp | grep 2181If yes, usesudo kill pidConduct a forced end to the process
Empowering ZooKeeper folders
sudo chown -R hadooper /export/servers/zookeeper
sudo chmod -R 755 /export/servers/zookeeper
ssh hadoop02 "sudo chown -R hadooper /export/servers/zookeeper && sudo chmod -R 755 /export/servers/zookeeper"
ssh hadoop03 "sudo chown -R hadooper /export/servers/zookeeper && sudo chmod -R 755 /export/servers/zookeeper"turn off the firewall
sudo ufw disable
ssh hadoop02 "sudo ufw disable"
ssh hadoop03 "sudo ufw disable"Execute ZooKeeper run instructions
Execute the following instructions, and then execute jps to check whether zookeeper starts normally. If it starts normally, it will be as shown in the following figure
$ZOOKEEPER_HOME/bin/zkServer.sh start
ssh hadoop02 "bash -c 'source /etc/profile && $ZOOKEEPER_HOME/bin/zkServer.sh start'"
ssh hadoop03 "bash -c 'source /etc/profile && $ZOOKEEPER_HOME/bin/zkServer.sh start'"
Check election results
$ZOOKEEPER_HOME/bin/zkServer.sh status
ssh hadoop02 "bash -c 'source /etc/profile && $ZOOKEEPER_HOME/bin/zkServer.sh status'"
ssh hadoop03 "bash -c 'source /etc/profile && $ZOOKEEPER_HOME/bin/zkServer.sh status'"The leader can appear at any node
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