Centos7啓動zookeeper無法連接2181端口

啓動zookeeper，能ping通虛擬機，但telnet ip+端口發現連接超時或拒絕

排查思路

1. 首先查看IP是否一樣
2. zookeeper是否啓動成功 bin/zkServer.sh status或者ss -ntl | grep 2181或者netstat -anpt | grep 2181
3. 查看Linux是否關閉防火牆

systemctl status firewalld.service

● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
   Active: active (running) since Sat 2019-12-28 21:57:48 CST; 4 months 7 days ago
     Docs: man:firewalld(1)
 Main PID: 701 (firewalld)
   CGroup: /system.slice/firewalld.service
           └─701 /usr/bin/python2 -Es /usr/sbin/firewalld --nofork --nopid

關閉防火牆(臨時關閉,重啓虛擬機後防火牆自動開啓)

sudo systemctl stop firewalld.service

禁止防火牆服務(永久關閉)

sudo systemctl disable firewalld.service

再次telnet即可連接成功