zk单机部署
root@ubuntu20:~# cd /apps
注意：3.5.x版本之后，应下载 apache-zookeeper-x.x.x-bin.tar.gz ，而不是 apache-zookeeper-x.x.x.tar.gz
会报Error: Could not find or load main class org.apache.zookeeper.ZooKeeperMain
tar -xf apache-zookeeper-3.8.2-bin.tar.gz
cd apache-zookeeper-3.8.2-bin/
cd conf/
mv zoo_sample.cfg zoo.cfg
vi zoo.cfg
bash
# The number of milliseconds of each tick
tickTime=2000
# The number of ticks that the initial
# synchronization phase can take
initLimit=10 #cs
# The number of ticks that can pass between
# sending a request and getting an acknowledgement
syncLimit=5
# the directory where the snapshot is stored.
# do not use /tmp for storage, /tmp here is just
# example sakes.
dataDir=/data/zookeeper
# the port at which the clients will connect
clientPort=2181.../bin/zkServer.sh start
ss -nlt |grep 2181
./bin/zkCli.sh
zk: localhost:2181(CONNECTED) 1\] create /host1 "192.168.1.100" Created /host1 \[zk: localhost:2181(CONNECTED) 2\] get /host1 192.168.1.100 \[zk: localhost:2181(CONNECTED) 3\] ls / \[host1, zookeeper
zk: localhost:2181(CONNECTED) 8\] create /luo Created /luo \[zk: localhost:2181(CONNECTED) 9\] create /luo/host1 "8.8.8.8" Created /luo/host1 \[zk: localhost:2181(CONNECTED) 10\] create /luo/host2 "8.8.8.8" Created /luo/host2 \[zk: localhost:2181(CONNECTED) 11\] ls /luo \[host1, host2
zk: localhost:2181(CONNECTED) 27\] get /luo/host2 #最后的信息要用get 8.8.8.8 python创建 ```bash #!/bin/enc python #coding:utf8 #需要安装kazoo 使用 pip3 install kazoo from kazoo.client import KazooClient zk=KazooClient(hosts='192.168.74.70:2181') zk.start() #makepath=True makepath是递归创建 zk.create('/name/t1',b'luohuiwen',makepath=True) #查查看具体数据 相当于get #data=zk.get('/name/t1') ## 获取某个节点下所有子节点，相当于ls data = zk.get_children('/name/') print(data) #与zk断开 zk.stop() ``` 连接zookConnection dropped: socket connection error: 句柄无效。 结论：kazoo版本2.9.0问题， 重新安装2.8.0版本就ok了，安装时指定版本号 kazoo==2.8.0 pip show kazoo pip3 uninstall kazoo pip3 install kazoo==2.8.0 ## zk集群部署 安装jdk apt update apt install openjdk-11-jdk -y 写入leader ，leader向flower同步 集群中一半写入成功就算成功， 集群中要一半以上的zk工作正常，整个集群可用 2181 客户端访问端口 2888 数据同步端口 lender才有 3888 选举端口 flower会和lender的2888端口镜像同步 ```bash root@ubuntu20:/apps/apache-zookeeper-3.8.2-bin# grep -vE "^$|^#" conf/zoo.cfg tickTime=2000 initLimit=10 syncLimit=5 dataDir=/data/zookeeper clientPort=2181 maxClientCnxns=120 ``` 拷贝配置文件到其他节点 root@ubuntu20:/apps/apache-zookeeper-3.8.2-bin# scp conf/zoo.cfg 192.168.74.71:/apps/apache-zookeeper-3.8.2-bin/ root@ubuntu20:/apps/apache-zookeeper-3.8.2-bin# scp conf/zoo.cfg 192.168.74.72:/apps/apache-zookeeper-3.8.2-bin/ 各个节点生成myid文件 mkdir -p /data/zookeeper/ \&\& echo 1 \> /data/zookeeper/myid mkdir -p /data/zookeeper/ \&\& echo 2 \> /data/zookeeper/myid mkdir -p /data/zookeeper/ \&\& echo 3 \> /data/zookeeper/myid /apps/apache-zookeeper-3.8.2-bin/bin/zkServer.sh start /apps/apache-zookeeper-3.8.2-bin/bin/zkServer.sh status /apps/apache-zookeeper-3.8.2-bin/bin/zkServer.sh restart 72是leader 在70写入数据72可以查看 ZooInspector查看 在72 leader查看 netstat -antpl tcp6 0 0 192.168.74.72:2888 192.168.74.70:33952 ESTABLISHED 161320/java tcp6 0 0 192.168.74.72:2888 192.168.74.71:35050 ESTABLISHED 161320/java 192.168.74.70的33952端口（随机端口） 向192.168.74.72:2888 同步数据 选举过程 投票 对比事务id，事务id最新的成为主，一样的比myid ，myid大的成为leader 监控2181端口 ##### 客户端编译 不支持java11版本 cd /opt \&\& mkdir zk \&\& cd zk apt install git -y git clone https://github.com/zzhang5/zooinspector.git cd zooinspector/ mvn clean package mvn clean package 跳过测试 mvn clean install package -Dmaven.test.skip=true