【云原生 | Kubernetes 系列】--- Zookeeper集群安装手册

Zookeeper 集群安装

序号	机器名	IP地址
1	zk-1	192.168.31.121
2	zk-2	192.168.31.122
3	zk-3	192.168.31.123

1 下载安装包

官网https://zookeeper.apache.org/releases.html

2. Jdk安装

apt install openjdk-8-jdk

root@zookeeper-1:~# java -version
openjdk version "1.8.0_342"
OpenJDK Runtime Environment (build 1.8.0_342-8u342-b07-0ubuntu1~20.04-b07)
OpenJDK 64-Bit Server VM (build 25.342-b07, mixed mode)

3. 安装zookeeper

mkdir /apps/
tar xf apache-zookeeper-3.6.3-bin.tar.gz -C /apps/
cp /apps/apache-zookeeper-3.6.3-bin/conf/{
    
    zoo_sample.cfg,zoo.cfg}
mkdir /data/zookeeper -p

修改配置文件

# The number of milliseconds of each tick
tickTime=2000
# The number of ticks that the initial 
# synchronization phase can take
initLimit=10
# 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
# the maximum number of client connections.
# increase this if you need to handle more clients
maxClientCnxns=100
server.1=192.168.31.121:2888:3888
server.2=192.168.31.122:2888:3888
server.3=192.168.31.123:2888:3888

参数	含义
tickTime=2000	心跳时间
initLimit=10	初始化集群时leader与follower超时次数
syncLimit=5	初始化同步后健康检查失败次数
dataDir=/data/zookeeper	数据持久化路径
clientPort=2181	监听端口
maxClientCnxns=60	单个IP最大并发连接数

4. 每台服务器生成zookeeper ID

文件名为myid,目录是dataDir的路径

# server.1上
echo 1 > /data/zookeeper/myid
# server.2上
echo 2 > /data/zookeeper/myid
# server.3上
echo 3 > /data/zookeeper/myid

5. 启动服务

/apps/apache-zookeeper-3.6.3-bin/bin/zkServer.sh start
root@zookeeper-1:/apps/apache-zookeeper-3.6.3-bin/conf# /apps/apache-zookeeper-3.6.3-bin/bin/zkServer.sh status
/usr/bin/java
ZooKeeper JMX enabled by default
Using config: /apps/apache-zookeeper-3.6.3-bin/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost. Client SSL: false.
Mode: leader  ## 此节点可写

root@zookeeper-2:/apps/apache-zookeeper-3.6.3-bin/conf# /apps/apache-zookeeper-3.6.3-bin/bin/zkServer.sh status
/usr/bin/java
ZooKeeper JMX enabled by default
Using config: /apps/apache-zookeeper-3.6.3-bin/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost. Client SSL: false.
Mode: follower ## 只读节点

此时三台服务器状态

序号	机器名	IP地址	角色	监听端口
1	zk-1	192.168.31.121	leader	2181,2888,3888
2	zk-2	192.168.31.122	follower	2181,3888
3	zk-3	192.168.31.123	follower	2181,3888