zookeeper集群搭建
一、java环境安装
1.下载jdk
去jdk下载地址下载或者在服务器中用命令下载
wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" https://download.oracle.com/otn-pub/java/jdk/8u191-b12/2787e4a523244c269598db4e85c51e0c/jdk-8u191-linux-x64.tar.gz
注意，以上jdk-8u191-linux-x64.tar.gz的地址是会变的，所以下载地址需要替换成自己的。
2.安装
创建目录
cd /usr/local/
mkdir java
cd java
接着把安装包上传到java文件夹中,解压
tar zxvf jdk-8u191-linux-x64.tar.gz
配置环境变量
vi /etc/profile
在文件的末尾输入
export JAVA_HOME=/usr/local/java/jdk1.8.0_191
export PATH=$PATH:$JAVA_HOME/bin
这里注意自己的是不是jdk1.8.0_191
使环境变量在当前bash中生效
source /etc/profile
二、zookeeper安装
1.下载
zookeeper下载地址下载安装包
或者命令下载
cd /usr/local mkdir zookeeper cd zookeeper wget https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/zookeeper-3.4.13/zookeeper-3.4.13.tar.gz
tar zxvf zookeeper-3.4.13.tar.gz
2.配置
创建data文件夹，打开配置文件
cd zookeeper-3.4.13
mkdir data
cd conf mv zoo_sample.cfg zoo.cfg vi zoo.cfg
# 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=/usr/local/zookeeper/zookeeper-1/data dataLogDir=/usr/local/zookeeper/zookeeper-1/log # 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 server.1=47.105.232.148:2888:3888 server.2=47.105.232.148:2889:3889 server.3=47.105.232.148:2890:3890 # # 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
quorumListenOnAllIPs=true
以上红色的需要注意，因为我用的是一台服务器，所以三个zookeeper这里配置应该不同，不然会冲突，黄色部分也要确保 server.1、server.2和server.3端口不冲突，如果是三台服务器的话就不需要了。
这里还需要注意的是，如果是在云服务器上部署的，需要配置quorumListenOnAllIPs=true，用以监听所有网卡，这个和云服务器的一些虚拟技术有关，否则的话会抛异常
[myid:0] - ERROR [/47.94.204.115:3888:QuorumCnxManager$Listener@763] - Exception while listening java.net.BindException: 无法指定被请求的地址 (Bind failed) at java.net.PlainSocketImpl.socketBind(Native Method) at java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:387) at java.net.ServerSocket.bind(ServerSocket.java:375) at java.net.ServerSocket.bind(ServerSocket.java:329) at org.apache.zookeeper.server.quorum.QuorumCnxManager$Listener.run(QuorumCnxManager.java:742)
另外这里如果想配置java的一些参数的话，可以在conf目录下创建java.env ,例如我这想修改一下java占用的内存为100m
# heap size MUST be modified according to cluster environment export JVMFLAGS="-Xms100m -Xmx100m $JVMFLAGS"
回到zookeeper目录下
cp -r zookeeper-3.4.13/ zookeeper-1 cp -r zookeeper-3.4.13/ zookeeper-2 cp -r zookeeper-3.4.13/ zookeeper-3
接着依次修改配置文件中 dataDir dataLogDir clientPort
最后记得创建各自的myid
echo "1" > zookeeper-1/data/myid echo "2" > zookeeper-2/data/myid echo "3" > zookeeper-4/data/myid
依次启动
./zookeeper-1/bin/zkServer.sh start ./zookeeper-2/bin/zkServer.sh start ./zookeeper-3/bin/zkServer.sh start
查看是否成功
这个是显示失败了，这里可能是配置文件出错或者有什么防火墙
我这里是因为云主机的安全组给挡住了
修改好之后先关闭
./zookeeper-1/bin/zkServer.sh stop ./zookeeper-2/bin/zkServer.sh stop ./zookeeper-3/bin/zkServer.sh stop
再次启动，成功
