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MiddleWare ❀ Zookeeper基础概述
1、认识Zookeeper
Zookeeper的数据结构类似于unix文件系统，等同于一棵树，每个节点称之为Znode，每个节点可以通过路径来进行标识，结构如下：
1.1 数据类型
节点数据类型主要分为两类：
- 短暂/临时 Ephemeral：当客户端和服务端端开连接后，所创建的Znode节点会自动删除；
- 持久 Persistent：当客户端和服务端端开连接后，所创建的Znode节点不会自动删除；
Zookeeper与Redis一样，分为客户端与服务端，典型的C/S结构。
1.2 监听器
Zookeeper配合了监听器，常见的监听器有以下两种：
- 监听Znode的数据变化；
- 监听子节点的增减变化。
1.3 基本功能
Zookeeper主要服务于分布式系统，可以用Zookeeper来做：统一配置管理、统一命名服务、分布式锁、集群管理；
1.3.1 统一配置管理
假设当前环境下有三个系统A、B、C，有三个配置，分别是A_system.yml、B_system.yml、C_system.yml，这三份配置非常类似，很多配置基本保持一致。
此时若是修改了其中一份配置项信息，另外两份也需要被破修改，改变了配置项的信息可能需要重启系统系统A、B、C来应用此配置。因此把A_system.yml、B_system.yml、C_system.yml相同的配置抽取成一份公用的配置common.yml，并且common.yml进行修改，不需要重启系统系统A、B、C；
可以将common.yml配置放在Zookeeper的Znode节点中，系统A、B、C监听这个Znode节点是否发生变更即可。
1.3.2 统一命名服务
统一命名服务的理解与域名相同，为某个部分资源取一个类似的名称，通过这个名称寻找对应的资源。
1.3.3 分布式锁
假设系统A、B、C都访问/locks节点，访问的时候会创建带顺序序号的临时节点，如：系统A创建了id_00000的节点，系统B创建了id_00002的节点，系统C创建了id_00001的节点，接着拿到/locks节点下的所有子节点（id_00000、id_00001、id_00002）判断自己创建的是不是最小的节点，如果是则拿到锁，当系统A执行完操作后，端开连接会删除临时节点id_00000，因此id_00001会成为最小的节点，系统C拿到锁，进行相关操作，直到系统B拿到锁执行完端开连接。
1.3.4 集群状态
Zookeeper Leader选举参数：
- server-id：服务器id，编号为1、2、3…，编号越大在选择算法中权重越大；
- Zxid：数据id，服务器中存放的最大数据id，数值越大说明数据越新，在选举算法中越新权重越大；
在选举中，若某台Zookeeper获得超过半数的选票，则被选为Leader，Leader一旦确认，非异常不可更改。以系统A、B、C为例，在Zookeeper创建临时节点，系统A挂了，则临时节点被删除，通过监听器可以感知到临时节点的子节点是否存在判断系统A的存活状态。
2、下载安装包
下载地址：
https://zookeeper.apache.org/，下载最新版本即可，非必须要求版本一致性。（注意：下载apache-zookeeper-3.8.0-bin.tar.gz，而不是apache-zookeeper-3.8.0.tar.gz）3、安装服务
下载完成后，将安装包传入Linux后台，并在对应目录下解压安装包
[root@centos7 download]# tar -zxvf apache-zookeeper-3.8.0-bin.tar.gz- 1
修改目录名称
[root@centos7 download]# mv apache-zookeeper-3.8.0-bin zookeeper [root@centos7 zookeeper]# ll total 36 drwxr-xr-x. 2 admin ftp 4096 Feb 25 2022 bin # 可执行文件目录 drwxr-xr-x. 2 admin ftp 72 Feb 25 2022 conf # 配置文件目录 drwxr-xr-x. 5 admin ftp 4096 Feb 25 2022 docs drwxr-xr-x. 2 root root 4096 Aug 30 02:43 lib -rw-r--r--. 1 admin ftp 11358 Feb 25 2022 LICENSE.txt -rw-r--r--. 1 admin ftp 2084 Feb 25 2022 NOTICE.txt -rw-r--r--. 1 admin ftp 2335 Feb 25 2022 README.md -rw-r--r--. 1 admin ftp 3570 Feb 25 2022 README_packaging.md- 1
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配置文件参数介绍
[root@centos7 zookeeper]# cd conf/ [root@centos7 conf]# ll total 16 -rw-r--r--. 1 admin ftp 535 Feb 25 2022 configuration.xsl -rw-r--r--. 1 admin ftp 4559 Feb 25 2022 logback.xml -rw-r--r--. 1 admin ftp 1183 Feb 25 2022 zoo_sample.cfg [root@centos7 conf]# cat zoo_sample.cfg # The number of milliseconds of each tick tickTime=2000 # Leader与Follower之间的心跳时间间隔，单位ms # The number of ticks that the initial # synchronization phase can take initLimit=10 # 最大心跳次数，10*2000ms=20s # The number of ticks that can pass between # sending a request and getting an acknowledgement syncLimit=5 # 最小心跳次数 # the directory where the snapshot is stored. # do not use /tmp for storage, /tmp here is just # example sakes. dataDir=/tmp/zookeeper # 数据存储路径，默认为临时目录，建议修改 # the port at which the clients will connect clientPort=2181 # 客户端连接端口，默认2181，支持自定义 # 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. # # https://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 ## Metrics Providers # # https://prometheus.io Metrics Exporter #metricsProvider.className=org.apache.zookeeper.metrics.prometheus.PrometheusMetricsProvider #metricsProvider.httpHost=0.0.0.0 #metricsProvider.httpPort=7000 #metricsProvider.exportJvmInfo=true- 1
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复制配置文件并进行修改
[root@centos7 zookeeper]# cd conf/ [root@centos7 conf]# ll total 16 -rw-r--r--. 1 admin ftp 535 Feb 25 2022 configuration.xsl -rw-r--r--. 1 admin ftp 4559 Feb 25 2022 logback.xml -rw-r--r--. 1 admin ftp 1183 Feb 25 2022 zoo_sample.cfg # 配置文件 [root@centos7 conf]# cp zoo_sample.cfg zoo.cfg [root@centos7 conf]# vim zoo.cfg # 修改数据文件路径为自定义路径 dataDir=/root/download/zookeeper/data/tmp # 切记需要创建对应目录路径 [root@centos7 conf]# cd ../ [root@centos7 zookeeper]# mkdir ./data- 1
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问题解答：Zookeeper为什么必须要复制配置文件为
zoo.cfg# 查看zkServer.sh启动服务脚本，发现调用zkEnv.sh [root@centos7 conf]# cat ../bin/zkServer.sh | grep 'zkEnv.sh' -C 3 ZOOBIN="$(dirname "${ZOOBIN}")" ZOOBINDIR="$(cd "${ZOOBIN}"; pwd)" if [ -e "$ZOOBIN/../libexec/zkEnv.sh" ]; then . "$ZOOBINDIR"/../libexec/zkEnv.sh else . "$ZOOBINDIR"/zkEnv.sh fi # See the following page for extensive details on setting # 查看zkEnv.sh脚本发现启动配置文件名称为zoo.cfg [root@centos7 conf]# cat ../bin/zkEnv.sh | grep 'zoo.cfg' -C 3 if [ "x$ZOOCFG" = "x" ] then ZOOCFG="zoo.cfg" fi ZOOCFG="$ZOOCFGDIR/$ZOOCFG" # 可以得到zkServer.sh最终的调用配置文件名称为zoo.cfg，因此必须进行复制配置文件操作或修改zkEnv.sh内的脚本名称（不建议后者）。- 1
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启动服务
[root@centos7 conf]# cd ../bin/ [root@centos7 bin]# ll total 72 -rw-r--r--. 1 admin ftp 232 Feb 25 2022 README.txt -rwxr-xr-x. 1 admin ftp 1978 Feb 25 2022 zkCleanup.sh -rw-r--r--. 1 admin ftp 1115 Feb 25 2022 zkCli.cmd -rwxr-xr-x. 1 admin ftp 1576 Feb 25 2022 zkCli.sh # 客户端脚本 -rw-r--r--. 1 admin ftp 1810 Feb 25 2022 zkEnv.cmd -rwxr-xr-x. 1 admin ftp 3613 Feb 25 2022 zkEnv.sh -rw-r--r--. 1 admin ftp 1243 Feb 25 2022 zkServer.cmd -rwxr-xr-x. 1 admin ftp 4559 Feb 25 2022 zkServer-initialize.sh -rwxr-xr-x. 1 admin ftp 11616 Feb 25 2022 zkServer.sh # 服务端脚本 -rwxr-xr-x. 1 admin ftp 987 Feb 25 2022 zkSnapshotComparer.cmd -rwxr-xr-x. 1 admin ftp 1374 Feb 25 2022 zkSnapshotComparer.sh -rwxr-xr-x. 1 admin ftp 988 Feb 25 2022 zkSnapShotToolkit.cmd -rwxr-xr-x. 1 admin ftp 1377 Feb 25 2022 zkSnapShotToolkit.sh -rwxr-xr-x. 1 admin ftp 996 Feb 25 2022 zkTxnLogToolkit.cmd -rwxr-xr-x. 1 admin ftp 1385 Feb 25 2022 zkTxnLogToolkit.sh [root@centos7 bin]# ./zkServer.sh start /usr/bin/java ZooKeeper JMX enabled by default Using config: /opt/zookeeper/bin/../conf/zoo.cfg Starting zookeeper ... STARTED- 1
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3.1 服务端命令
# 查看/停止/重启 服务状态 [root@centos7 bin]# ./zkServer.sh status/stop/restart /usr/bin/java ZooKeeper JMX enabled by default Using config: /opt/zookeeper/bin/../conf/zoo.cfg Client port found: 2181. Client address: localhost. Client SSL: false. Error contacting service. It is probably not running. # 服务端口 [root@centos7 bin]# netstat -anop | grep 2181 tcp6 0 0 :::2181 :::* LISTEN 4700/java off (0.00/0/0)- 1
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3.2 客户端命令
# 连接命令 [root@centos7 bin]# ./zkCli.sh -server localhost:2181 /usr/bin/java Connecting to localhost:2181 2022-08-30 02:50:49,009 [myid:] - INFO [main:o.a.z.Environment@98] - Client environment:zookeeper.version=3.8.0-5a02a05eddb59aee6ac762f7ea82e92a68eb9c0f, built on 2022-02-25 08:49 UTC 2022-08-30 02:50:49,013 [myid:] - INFO [main:o.a.z.Environment@98] - Client environment:host.name=centos7.3-1 2022-08-30 02:50:49,013 [myid:] - INFO [main:o.a.z.Environment@98] - Client environment:java.version=1.8.0_102 2022-08-30 02:50:49,013 [myid:] - INFO [main:o.a.z.Environment@98] - Client environment:java.vendor=Oracle Corporation 2022-08-30 02:50:49,013 [myid:] - INFO [main:o.a.z.Environment@98] - Client environment:java.home=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.102-4.b14.el7.x86_64/jre 2022-08-30 02:50:49,013 [myid:] - INFO [main:o.a.z.Environment@98] - Client environment:java.class.path=/root/download/zookeeper/bin/../zookeeper-server/target/classes:/root/download/zookeeper/bin/../build/classes:/root/download/zookeeper/bin/../zookeeper-server/target/lib/*.jar:/root/download/zookeeper/bin/../build/lib/*.jar:/root/download/zookeeper/bin/../lib/zookeeper-prometheus-metrics-3.8.0.jar:/root/download/zookeeper/bin/../lib/zookeeper-jute-3.8.0.jar:/root/download/zookeeper/bin/../lib/zookeeper-3.8.0.jar:/root/download/zookeeper/bin/../lib/snappy-java-1.1.7.7.jar:/root/download/zookeeper/bin/../lib/slf4j-api-1.7.30.jar:/root/download/zookeeper/bin/../lib/simpleclient_servlet-0.9.0.jar:/root/download/zookeeper/bin/../lib/simpleclient_hotspot-0.9.0.jar:/root/download/zookeeper/bin/../lib/simpleclient_common-0.9.0.jar:/root/download/zookeeper/bin/../lib/simpleclient-0.9.0.jar:/root/download/zookeeper/bin/../lib/netty-transport-native-unix-common-4.1.73.Final.jar:/root/download/zookeeper/bin/../lib/netty-transport-native-epoll-4.1.73.Final.jar:/root/download/zookeeper/bin/../lib/netty-transport-classes-epoll-4.1.73.Final.jar:/root/download/zookeeper/bin/../lib/netty-transport-4.1.73.Final.jar:/root/download/zookeeper/bin/../lib/netty-tcnative-classes-2.0.48.Final.jar:/root/download/zookeeper/bin/../lib/netty-tcnative-2.0.48.Final.jar:/root/download/zookeeper/bin/../lib/netty-resolver-4.1.73.Final.jar:/root/download/zookeeper/bin/../lib/netty-handler-4.1.73.Final.jar:/root/download/zookeeper/bin/../lib/netty-common-4.1.73.Final.jar:/root/download/zookeeper/bin/../lib/netty-codec-4.1.73.Final.jar:/root/download/zookeeper/bin/../lib/netty-buffer-4.1.73.Final.jar:/root/download/zookeeper/bin/../lib/metrics-core-4.1.12.1.jar:/root/download/zookeeper/bin/../lib/logback-core-1.2.10.jar:/root/download/zookeeper/bin/../lib/logback-classic-1.2.10.jar:/root/download/zookeeper/bin/../lib/jline-2.14.6.jar:/root/download/zookeeper/bin/../lib/jetty-util-ajax-9.4.43.v20210629.jar:/root/download/zookeeper/bin/../lib/jetty-util-9.4.43.v20210629.jar:/root/download/zookeeper/bin/../lib/jetty-servlet-9.4.43.v20210629.jar:/root/download/zookeeper/bin/../lib/jetty-server-9.4.43.v20210629.jar:/root/download/zookeeper/bin/../lib/jetty-security-9.4.43.v20210629.jar:/root/download/zookeeper/bin/../lib/jetty-io-9.4.43.v20210629.jar:/root/download/zookeeper/bin/../lib/jetty-http-9.4.43.v20210629.jar:/root/download/zookeeper/bin/../lib/javax.servlet-api-3.1.0.jar:/root/download/zookeeper/bin/../lib/jackson-databind-2.13.1.jar:/root/download/zookeeper/bin/../lib/jackson-core-2.13.1.jar:/root/download/zookeeper/bin/../lib/jackson-annotations-2.13.1.jar:/root/download/zookeeper/bin/../lib/commons-io-2.11.0.jar:/root/download/zookeeper/bin/../lib/commons-cli-1.4.jar:/root/download/zookeeper/bin/../lib/audience-annotations-0.12.0.jar:/root/download/zookeeper/bin/../zookeeper-*.jar:/root/download/zookeeper/bin/../zookeeper-server/src/main/resources/lib/*.jar:/root/download/zookeeper/bin/../conf: 2022-08-30 02:50:49,013 [myid:] - INFO [main:o.a.z.Environment@98] - Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib 2022-08-30 02:50:49,013 [myid:] - INFO [main:o.a.z.Environment@98] - Client environment:java.io.tmpdir=/tmp 2022-08-30 02:50:49,014 [myid:] - INFO [main:o.a.z.Environment@98] - Client environment:java.compiler=<NA> 2022-08-30 02:50:49,014 [myid:] - INFO [main:o.a.z.Environment@98] - Client environment:os.name=Linux 2022-08-30 02:50:49,014 [myid:] - INFO [main:o.a.z.Environment@98] - Client environment:os.arch=amd64 2022-08-30 02:50:49,014 [myid:] - INFO [main:o.a.z.Environment@98] - Client environment:os.version=3.10.0-514.el7.x86_64 2022-08-30 02:50:49,014 [myid:] - INFO [main:o.a.z.Environment@98] - Client environment:user.name=root 2022-08-30 02:50:49,014 [myid:] - INFO [main:o.a.z.Environment@98] - Client environment:user.home=/root 2022-08-30 02:50:49,014 [myid:] - INFO [main:o.a.z.Environment@98] - Client environment:user.dir=/root/download/zookeeper/bin 2022-08-30 02:50:49,014 [myid:] - INFO [main:o.a.z.Environment@98] - Client environment:os.memory.free=10MB 2022-08-30 02:50:49,014 [myid:] - INFO [main:o.a.z.Environment@98] - Client environment:os.memory.max=247MB 2022-08-30 02:50:49,015 [myid:] - INFO [main:o.a.z.Environment@98] - Client environment:os.memory.total=15MB 2022-08-30 02:50:49,025 [myid:] - INFO [main:o.a.z.ZooKeeper@637] - Initiating client connection, connectString=localhost:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@1b604f19 2022-08-30 02:50:49,030 [myid:] - INFO [main:o.a.z.c.X509Util@77] - Setting -D jdk.tls.rejectClientInitiatedRenegotiation=true to disable client-initiated TLS renegotiation 2022-08-30 02:50:49,042 [myid:] - INFO [main:o.a.z.ClientCnxnSocket@239] - jute.maxbuffer value is 1048575 Bytes 2022-08-30 02:50:49,050 [myid:] - INFO [main:o.a.z.ClientCnxn@1732] - zookeeper.request.timeout value is 0. feature enabled=false Welcome to ZooKeeper! JLine support is enabled 2022-08-30 02:50:49,121 [myid:localhost:2181] - INFO [main-SendThread(localhost:2181):o.a.z.ClientCnxn$SendThread@1171] - Opening socket connection to server localhost/127.0.0.1:2181. 2022-08-30 02:50:49,121 [myid:localhost:2181] - INFO [main-SendThread(localhost:2181):o.a.z.ClientCnxn$SendThread@1173] - SASL config status: Will not attempt to authenticate using SASL (unknown error) 2022-08-30 02:50:49,130 [myid:localhost:2181] - INFO [main-SendThread(localhost:2181):o.a.z.ClientCnxn$SendThread@1005] - Socket connection established, initiating session, client: /127.0.0.1:36080, server: localhost/127.0.0.1:2181 2022-08-30 02:50:49,172 [myid:localhost:2181] - INFO [main-SendThread(localhost:2181):o.a.z.ClientCnxn$SendThread@1444] - Session establishment complete on server localhost/127.0.0.1:2181, session id = 0x100001fa4000000, negotiated timeout = 30000 WATCHER:: WatchedEvent state:SyncConnected type:None path:null [zk: localhost:2181(CONNECTED) 0] # 查看当前节点信息 [zk: localhost:2181(CONNECTED) 1] ls /zookeeper [config, quota] [zk: localhost:2181(CONNECTED) 2] ls /zookeeper/config [] [zk: localhost:2181(CONNECTED) 3] ls /zookeeper/quota [] [zk: localhost:2181(CONNECTED) 4] ls -R /zookeeper /zookeeper /zookeeper/config /zookeeper/quota # 创建节点 [zk: localhost:2181(CONNECTED) 6] create /app1 data_test Created /app1 [zk: localhost:2181(CONNECTED) 8] create /app2 Created /app2 [zk: localhost:2181(CONNECTED) 9] get /app1 data_test [zk: localhost:2181(CONNECTED) 10] get /app2 null [zk: localhost:2181(CONNECTED) 13] create /app2/app21 Created /app2/app21 [zk: localhost:2181(CONNECTED) 14] create /app2/app22 date_test_22 Created /app2/app22 [zk: localhost:2181(CONNECTED) 15] ls /app2 [app21, app22] # 修改节点 [zk: localhost:2181(CONNECTED) 11] set /app2 data_test222 [zk: localhost:2181(CONNECTED) 12] get /app2 data_test222 # 删除节点 [zk: localhost:2181(CONNECTED) 16] delete /app2 # 若节点下存在子节点，则需要删除子节点，后删除父节点 Node not empty: /app2 [zk: localhost:2181(CONNECTED) 17] delete delete deleteall [zk: localhost:2181(CONNECTED) 17] deleteall /app2 # deleteall 可以强行删除父节点 [zk: localhost:2181(CONNECTED) 18] ls / [app1, zookeeper] # 帮助 [zk: localhost:2181(CONNECTED) 19] help ZooKeeper -server host:port -client-configuration properties-file cmd args addWatch [-m mode] path # optional mode is one of [PERSISTENT, PERSISTENT_RECURSIVE] - default is PERSISTENT_RECURSIVE addauth scheme auth close config [-c] [-w] [-s] connect host:port create [-s] [-e] [-c] [-t ttl] path [data] [acl] delete [-v version] path deleteall path [-b batch size] delquota [-n|-b|-N|-B] path get [-s] [-w] path getAcl [-s] path getAllChildrenNumber path getEphemerals path history listquota path ls [-s] [-w] [-R] path printwatches on|off quit reconfig [-s] [-v version] [[-file path] | [-members serverID=host:port1:port2;port3[,...]*]] | [-add serverId=host:port1:port2;port3[,...]]* [-remove serverId[,...]*] redo cmdno removewatches path [-c|-d|-a] [-l] set [-s] [-v version] path data setAcl [-s] [-v version] [-R] path acl setquota -n|-b|-N|-B val path stat [-w] path sync path version whoami Command not found: Command not found help # 退出 [zk: localhost:2181(CONNECTED) 20] quit 2022-08-30 03:12:45,303 [myid:localhost:2181] - WARN [main-SendThread(localhost:2181):o.a.z.ClientCnxn$SendThread@1286] - An exception was thrown while closing send thread for session 0x100001fa4000001. org.apache.zookeeper.ClientCnxn$EndOfStreamException: Unable to read additional data from server sessionid 0x100001fa4000001, likely server has closed socket at org.apache.zookeeper.ClientCnxnSocketNIO.doIO(ClientCnxnSocketNIO.java:77) at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:350) at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1282) WATCHER:: WatchedEvent state:Closed type:None path:null 2022-08-30 03:12:45,410 [myid:] - INFO [main:o.a.z.ZooKeeper@1232] - Session: 0x100001fa4000001 closed 2022-08-30 03:12:45,412 [myid:] - ERROR [main:o.a.z.u.ServiceUtils@42] - Exiting JVM with code 127 2022-08-30 03:12:45,415 [myid:] - INFO [main-EventThread:o.a.z.ClientCnxn$EventThread@568] - EventThread shut down for session: 0x100001fa4000001- 1
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3、集群部署
真实的集群是需要部署在不同的服务器上，但是在测试环境中这种行为需要多数的服务器支持，相对浪费资源，因此可以将不同的服务使用端口进行区分，以此构成伪集群。
# 安装包上传并进行解压 [root@centos7 download]# ll 总用量 12880 drwxr-xr-x. 6 root root 133 8月 31 20:02 apache-zookeeper-3.8.0-bin -rw-r--r--. 1 root root 13185104 8月 30 02:39 apache-zookeeper-3.8.0-bin.tar.gz [root@centos7 download]# cp -r apache-zookeeper-3.8.0-bin zookeeper_1 [root@centos7 download]# cp -r apache-zookeeper-3.8.0-bin zookeeper_2 [root@centos7 download]# cp -r apache-zookeeper-3.8.0-bin zookeeper_3 # 创建数据存储路径，并复制配置文件 [root@centos7 download]# mkdir ./zookeeper_1/data [root@centos7 download]# mkdir ./zookeeper_2/data [root@centos7 download]# mkdir ./zookeeper_3/data [root@centos7 download]# [root@centos7 download]# cp -a ./zookeeper_1/conf/zoo_sample.cfg ./zookeeper_1/conf/zoo.cfg [root@centos7 download]# cp -a ./zookeeper_2/conf/zoo_sample.cfg ./zookeeper_2/conf/zoo.cfg [root@centos7 download]# cp -a ./zookeeper_3/conf/zoo_sample.cfg ./zookeeper_3/conf/zoo.cfg # 修改配置文件中对应的数据存储路径 [root@centos7 download]# sed -i '12s@dataDir\=\/tmp\/zookeeper@dataDir\=\/root\/download\/zookeeper\_1\/data\/tmp@' /root/download//zookeeper_1/conf/zoo.cfg [root@centos7 download]# sed -i '12s@dataDir\=\/tmp\/zookeeper@dataDir\=\/root\/download\/zookeeper\_2\/data\/tmp@' /root/download//zookeeper_2/conf/zoo.cfg [root@centos7 download]# sed -i '12s@dataDir\=\/tmp\/zookeeper@dataDir\=\/root\/download\/zookeeper\_3\/data\/tmp@' /root/download//zookeeper_3/conf/zoo.cfg # 修改服务端口（伪集群端口不可冲突） [root@centos7 download]# sed -i '14s@clientPort=2181@clientPort=2182@' /root/download//zookeeper_2/conf/zoo.cfg [root@centos7 download]# sed -i '14s@clientPort=2181@clientPort=2183@' /root/download//zookeeper_3/conf/zoo.cfg # 配置集群IP列表，配置格式：server.id=服务器IP地址：服务器之间的通信端口： # zookeeper_2与zookeeper_3配置相同 [root@centos7 download]# sed -i '$i server.1=192.168.160.128:2881:3881\nserver.2=192.168.160.128:2882:3882\nserver.3=192.168.160.128:2883:3883' /root/download/zookeeper_1/conf/zoo.cfg # 在tmp目录（配置文件中自定义的数据存储路径）下创建myid文件，id需要对应配置的IP地址 [root@centos7 download]# echo '1' > /root/download/zookeeper_1/data/tmp/myid [root@centos7 download]# echo '2' > /root/download/zookeeper_2/data/tmp/myid [root@centos7 download]# echo '3' > /root/download/zookeeper_3/data/tmp/myid # 启动集群服务 [root@centos7 download]# /root/download/zookeeper_1/bin/zkServer.sh start [root@centos7 download]# /root/download/zookeeper_2/bin/zkServer.sh start [root@centos7 download]# /root/download/zookeeper_3/bin/zkServer.sh start # 服务启动验证 [root@centos7 conf]# netstat -atunolp | grep -E '2181|2182|2183' tcp6 0 0 :::2181 :::* LISTEN 4176/java off (0.00/0/0) tcp6 0 0 :::2182 :::* LISTEN 5267/java off (0.00/0/0) tcp6 0 0 :::2183 :::* LISTEN 5495/java off (0.00/0/0) # 查看节点Mode状态 [root@centos7 download]# /root/download/zookeeper_1/bin/zkServer.sh status | grep Mode Mode: follower [root@centos7 download]# /root/download/zookeeper_2/bin/zkServer.sh status | grep Mode Mode: leader [root@centos7 download]# /root/download/zookeeper_3/bin/zkServer.sh status | grep Mode Mode: follower- 1
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- 原文地址：https://blog.csdn.net/qq_42197548/article/details/126680145
