1.相关命令

问题:Unit firewalld.service could not be found.
直接拉取firewall-cmd:
yum install firewalld systemd -y
查看服务器上是否安装了firewall
systemctl status firewalld
开启防火墙
systemctl start firewalld.service
关闭防火墙
systemctl stop firewalld.service
设置开机自启
systemctl enable firewalld.service
设置关闭开机自启动
systemctl disable firewalld.service
在不改变状态的条件下重新加载防火墙
firewall-cmd --reload 
查看已开发的端口
netstat -anp
查询指定8080端口是否开发
firewall-cmd --query-port=8080/tcp
重启虚拟机
service network restart
docker 的镜像与容器都存储在 /var/lib/docker 下面
进入zookeeper容器中
docker exec -it 66805aa71339 /bin/bash
客户端连接
./bin/zkCli.sh
连接后的操作记录
[zk: localhost:2181(CONNECTED) 0] ls /
[services, zookeeper]
[zk: localhost:2181(CONNECTED) 1] ls /services
[cloud-payment-service]
[zk: localhost:2181(CONNECTED) 3] ls /services/cloud-payment-service
[65a2b4b6-34e5-4c92-af96-fc8af66f6913]
[zk: localhost:2181(CONNECTED) 5] get /services/cloud-payment-service/65a2b4b6-34e5-4c92-af96-fc8af66f6913

{"name":"cloud-payment-service","id":"65a2b4b6-34e5-4c92-af96-fc8af66f6913","address":"DESKTOP-L51JTQC.mshome.net","port":8004,"sslPort":null,"payload":{"@class":"org.springframework.cloud.zookeeper.discovery.ZookeeperInstance","id":"application-1","name":"cloud-payment-service","metadata":{}},"registrationTimeUTC":1595665156117,"serviceType":"DYNAMIC","uriSpec":{"parts":[{"value":"scheme","variable":true},{"value":"://","variable":false},{"value":"address","variable":true},{"value":":","variable":false},{"value":"port","variable":true}]}}
[zk: localhost:2181(CONNECTED) 6] get /zookeeper