第 2 章 Zookeeper 本地安装

第 2 章 Zookeeper 本地安装

安装包下载地址：https://zookeeper.apache.org/releases.html

以centos7 linux环境安装为例;

首先准备好linux 机器，可以使用虚拟机搭建，可参考 https://blog.csdn.net/weixin_45847167/article/details/121160467

我机器的ip：192.168.3.60

安装zookeeper 之前需要安装jdk，参考此篇文章 https://blog.csdn.net/weixin_45847167/article/details/121176936

以 apache-zookeeper-3.5.7-bin.tar.gz 安装包为例

解压安装包:

tar -zxvf apache-zookeeper-3.5.7-bin.tar.gz

修改配置文件

[vagrant@localhost ~]$ cd apache-zookeeper-3.5.7-bin/conf/
[vagrant@localhost conf]$ ll
total 12
-rw-r--r--. 1 vagrant vagrant  535 May  4  2018 configuration.xsl
-rw-r--r--. 1 vagrant vagrant 2712 Feb  7  2020 log4j.properties
-rw-r--r--. 1 vagrant vagrant  922 Feb  7  2020 zoo_sample.cfg

zoo_sample.cfg 文件是示例文件，我们复制一份，并修改名称：

[vagrant@localhost conf]$ cp zoo_sample.cfg zoo.cfg
[vagrant@localhost conf]$ ll
total 16
-rw-r--r--. 1 vagrant vagrant  535 May  4  2018 configuration.xsl
-rw-r--r--. 1 vagrant vagrant 2712 Feb  7  2020 log4j.properties
-rw-r--r--. 1 vagrant vagrant  922 Jan  8 08:19 zoo.cfg
-rw-r--r--. 1 vagrant vagrant  922 Feb  7  2020 zoo_sample.cfg

修改配置文件：

vi zoo.cfg

只需修改 dataDir 的路径，默认/tmp 是临时路径，内容会被定时清理，比如我修改为/home/vagrant/apache-zookeeper-3.5.7-bin/data

可事先创建出来目录：

mkdir /home/vagrant/apache-zookeeper-3.5.7-bin/data

修改之后配置文件是这样的：

# 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=/home/vagrant/apache-zookeeper-3.5.7-bin/data
# 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=60
#
# Be sure to read the maintenance section of the 
# administrator guide before turning on autopurge.
#
# http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
#
# The number of snapshots to retain in dataDir
#autopurge.snapRetainCount=3
# Purge task interval in hours
# Set to "0" to disable auto purge feature
#autopurge.purgeInterval=1

配置参数解读

tickTime = 2000：通信心跳时间，Zookeeper服务器与客户端心跳时间，单位毫秒

initLimit = 10：LF初始通信时限

Leader和Follower初始连接时能容忍的最多心跳数（tickTime的数量）

syncLimit = 5：LF同步通信时限

Leader和Follower之间通信时间如果超过syncLimit * tickTime，Leader认为Follwer死掉，从服务器列表中删除Follwer。

dataDir：保存Zookeeper中的数据
注意：默认的tmp目录，容易被Linux系统定期删除，所以一般不用默认的tmp目录。

clientPort = 2181：客户端连接端口，通常不做修改。

启动zookeeper

[vagrant@localhost ~]$ cd apache-zookeeper-3.5.7-bin/bin
[vagrant@localhost bin]$ ll
total 56
-rwxr-xr-x. 1 vagrant vagrant  232 May  4  2018 README.txt
-rwxr-xr-x. 1 vagrant vagrant 2067 Feb  7  2020 zkCleanup.sh
-rwxr-xr-x. 1 vagrant vagrant 1158 Feb 10  2020 zkCli.cmd
-rwxr-xr-x. 1 vagrant vagrant 1621 Feb  7  2020 zkCli.sh
-rwxr-xr-x. 1 vagrant vagrant 1766 Feb  7  2020 zkEnv.cmd
-rwxr-xr-x. 1 vagrant vagrant 3690 Jan 31  2020 zkEnv.sh
-rwxr-xr-x. 1 vagrant vagrant 1286 Jan 31  2020 zkServer.cmd
-rwxr-xr-x. 1 vagrant vagrant 4573 Feb  7  2020 zkServer-initialize.sh
-rwxr-xr-x. 1 vagrant vagrant 9386 Feb  7  2020 zkServer.sh
-rwxr-xr-x. 1 vagrant vagrant  996 Oct  3  2019 zkTxnLogToolkit.cmd
-rwxr-xr-x. 1 vagrant vagrant 1385 Feb  7  2020 zkTxnLogToolkit.sh
[vagrant@localhost bin]$ ./zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /home/vagrant/apache-zookeeper-3.5.7-bin/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
[vagrant@localhost bin]$ ./zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /home/vagrant/apache-zookeeper-3.5.7-bin/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: standalone

客户端连接

使用命令连接：

[vagrant@localhost bin]$ ./zkCli.sh
Connecting to localhost:2181
2022-01-08 08:28:57,696 [myid:] - INFO  [main:Environment@109] - Client environment:zookeeper.version=3.5.7-f0fdd52973d373ffd9c86b81d99842dc2c7f660e, built on 02/10/2020 11:30 GMT
2022-01-08 08:28:57,702 [myid:] - INFO  [main:Environment@109] - Client environment:host.name=localhost
2022-01-08 08:28:57,702 [myid:] - INFO  [main:Environment@109] - Client environment:java.version=11
2022-01-08 08:28:57,704 [myid:] - INFO  [main:Environment@109] - Client environment:java.vendor=Oracle Corporation
2022-01-08 08:28:57,704 [myid:] - INFO  [main:Environment@109] - Client environment:java.home=/home/vagrant/jdk-11
2022-01-08 08:28:57,704 [myid:] - INFO  [main:Environment@109] - Client environment:java.class.path=/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../zookeeper-server/target/classes:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../build/classes:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../zookeeper-server/target/lib/*.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../build/lib/*.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/zookeeper-jute-3.5.7.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/zookeeper-3.5.7.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/slf4j-log4j12-1.7.25.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/slf4j-api-1.7.25.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/netty-transport-native-unix-common-4.1.45.Final.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/netty-transport-native-epoll-4.1.45.Final.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/netty-transport-4.1.45.Final.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/netty-resolver-4.1.45.Final.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/netty-handler-4.1.45.Final.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/netty-common-4.1.45.Final.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/netty-codec-4.1.45.Final.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/netty-buffer-4.1.45.Final.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/log4j-1.2.17.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/json-simple-1.1.1.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/jline-2.11.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/jetty-util-9.4.24.v20191120.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/jetty-servlet-9.4.24.v20191120.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/jetty-server-9.4.24.v20191120.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/jetty-security-9.4.24.v20191120.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/jetty-io-9.4.24.v20191120.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/jetty-http-9.4.24.v20191120.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/javax.servlet-api-3.1.0.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/jackson-databind-2.9.10.2.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/jackson-core-2.9.10.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/jackson-annotations-2.9.10.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/commons-cli-1.2.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../lib/audience-annotations-0.5.0.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../zookeeper-*.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../zookeeper-server/src/main/resources/lib/*.jar:/home/vagrant/apache-zookeeper-3.5.7-bin/bin/../conf:/home/vagrant/jdk-11/lib:
2022-01-08 08:28:57,705 [myid:] - INFO  [main:Environment@109] - Client environment:java.library.path=/usr/java/packages/lib:/usr/lib64:/lib64:/lib:/usr/lib
2022-01-08 08:28:57,705 [myid:] - INFO  [main:Environment@109] - Client environment:java.io.tmpdir=/tmp
2022-01-08 08:28:57,705 [myid:] - INFO  [main:Environment@109] - Client environment:java.compiler=
2022-01-08 08:28:57,705 [myid:] - INFO  [main:Environment@109] - Client environment:os.name=Linux
2022-01-08 08:28:57,705 [myid:] - INFO  [main:Environment@109] - Client environment:os.arch=amd64
2022-01-08 08:28:57,705 [myid:] - INFO  [main:Environment@109] - Client environment:os.version=3.10.0-1127.el7.x86_64
2022-01-08 08:28:57,705 [myid:] - INFO  [main:Environment@109] - Client environment:user.name=vagrant
2022-01-08 08:28:57,705 [myid:] - INFO  [main:Environment@109] - Client environment:user.home=/home/vagrant
2022-01-08 08:28:57,706 [myid:] - INFO  [main:Environment@109] - Client environment:user.dir=/home/vagrant/apache-zookeeper-3.5.7-bin/bin
2022-01-08 08:28:57,706 [myid:] - INFO  [main:Environment@109] - Client environment:os.memory.free=5MB
2022-01-08 08:28:57,708 [myid:] - INFO  [main:Environment@109] - Client environment:os.memory.max=247MB
2022-01-08 08:28:57,708 [myid:] - INFO  [main:Environment@109] - Client environment:os.memory.total=7MB
2022-01-08 08:28:57,716 [myid:] - INFO  [main:ZooKeeper@868] - Initiating client connection, connectString=localhost:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@76329302
2022-01-08 08:28:57,721 [myid:] - INFO  [main:X509Util@79] - Setting -D jdk.tls.rejectClientInitiatedRenegotiation=true to disable client-initiated TLS renegotiation
2022-01-08 08:28:57,737 [myid:] - INFO  [main:ClientCnxnSocket@237] - jute.maxbuffer value is 4194304 Bytes
2022-01-08 08:28:57,746 [myid:] - INFO  [main:ClientCnxn@1653] - zookeeper.request.timeout value is 0. feature enabled=
Welcome to ZooKeeper!
JLine support is enabled
2022-01-08 08:28:57,828 [myid:localhost:2181] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1112] - Opening socket connection to server localhost/0:0:0:0:0:0:0:1:2181. Will not attempt to authenticate using SASL (unknown error)
2022-01-08 08:28:57,840 [myid:localhost:2181] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@959] - Socket connection established, initiating session, client: /0:0:0:0:0:0:0:1:46530, server: localhost/0:0:0:0:0:0:0:1:2181
2022-01-08 08:28:57,903 [myid:localhost:2181] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1394] - Session establishment complete on server localhost/0:0:0:0:0:0:0:1:2181, sessionid = 0x100001149e10000, negotiated timeout = 30000

WATCHER::

WatchedEvent state:SyncConnected type:None path:null
[zk: localhost:2181(CONNECTED) 0] ls /
[zookeeper]

获取使用客户端工具连接：