注意:如果未初始化数据目录,则无法启动ZooKeeper服务器。
//在生产环境中,您应该将ZooKeeper部署为具有奇数个服务器的集合。只要集合中的大多数服务器可用,ZooKeeper服务就可用。建议的最小集合大小是三个ZooKeeper服务器,Cloudera建议每个服务器在单独的计算机上运行。此外,如果可能,ZooKeeper服务器进程应该有自己的专用磁盘存储。
//查看zk的状态
[root@hadoop-205-107 opt]# echo "stat" |nc 192.168.205.107 2181 Zookeeper version: 3.4.5-cdh5.9.2--1, built on 04/04/2017 08:43 GMT Clients: /192.168.205.107:35132[1](queued=0,recved=424,sent=424) /192.168.205.107:45317[0](queued=0,recved=1,sent=0) /192.168.205.107:35125[1](queued=0,recved=879,sent=879) /192.168.205.107:35227[1](queued=0,recved=6576,sent=6576) /192.168.205.107:35133[1](queued=0,recved=449,sent=449) /192.168.205.107:35075[1](queued=0,recved=508,sent=510) /192.168.205.107:35100[1](queued=0,recved=432,sent=432) /192.168.205.107:35083[1](queued=0,recved=2404,sent=2441) Latency min/avg/max: 0/0/231 Received: 15265 Sent: 15579 Connections: 8 Outstanding: 0 Zxid: 0x7fa Mode: standalone Node count: 44 [root@hadoop-205-107 opt]# echo "stat" |nc 192.168.205.107 2181|grep Mode Mode: standalone [root@hadoop-205-107 opt]# /opt/cloudera/parcels/CDH-5.9.2-1.cdh5.9.2.p0.3/lib/zookeeper/bin/zkServer.sh status JMX enabled by default Using config: /opt/cloudera/parcels/CDH-5.9.2-1.cdh5.9.2.p0.3/lib/zookeeper/bin/../conf/zoo.cfg Mode: standalone [root@hadoop-205-107 opt]# telnet 192.168.205.107 2181 Trying 192.168.205.107... Connected to 192.168.205.107. Escape character is '^]'. stat //手动输入 Zookeeper version: 3.4.5-cdh5.9.2--1, built on 04/04/2017 08:43 GMT Clients: /192.168.205.107:35132[1](queued=0,recved=445,sent=445) /192.168.205.107:35125[1](queued=0,recved=912,sent=912) /192.168.205.107:35227[1](queued=0,recved=7233,sent=7233) /192.168.205.107:35133[1](queued=0,recved=470,sent=470) /192.168.205.107:45868[0](queued=0,recved=1,sent=0) /192.168.205.107:35075[1](queued=0,recved=529,sent=531) /192.168.205.107:35100[1](queued=0,recved=453,sent=453) /192.168.205.107:35083[1](queued=0,recved=2447,sent=2484) Latency min/avg/max: 0/0/231 Received: 16267 Sent: 16595 Connections: 8 Outstanding: 0 Zxid: 0x855 Mode: standalone Node count: 44 Connection closed by foreign host.