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zookeeper
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安装前的准备
yum install \ vim \ gcc \ gcc-c++ \ wget \ make \ automake \ autoconf \ -y \ -
检查是否安装JDK
rpm -qa|grep -E '^open[jre|jdk]|j[re|dk]' -
卸载已安装JDK
rpm -qa|grep java|xargs rpm -e --nodeps -
yum安装jdk
yum search java|grep jdk yum install java-1.8.0-openjdk -
检查安装是否成功
java -version java version "1.8.0_101" Java(TM) SE Runtime Environment (build 1.8.0_101-b13) Java HotSpot(TM) 64-Bit Server VM (build 25.101-b13, mixed mode) -
下载并安装
cd /root wget https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/zookeeper-3.4.13/zookeeper-3.4.13.tar.gz tar -xvf zookeeper-3.4.11.tar.gz mv ./zookeeper-3.4.11 /usr/local/zookeeper mkdir /usr/local/zookeeper/var mkdir /usr/local/zookeeper/var/log echo 1 > /usr/local/zookeeper/var/log/myid cp /usr/local/zookeeper/conf/zoo_sample.cfg /usr/local/zookeeper/conf/zoo.cfg -
修改配置
vim /usr/local/zookeeper/conf/zoo.cfg tickTime=2000 initLimit=5 syncLimit=2 dataDir=/usr/local/zookeeper/var/log dataLogDir=/usr/local/zookeeper/var/log clientPort=2181 # 多台server在下面配置即可,如果单台服务器构建多个server,则每个server用过的端口不能重复使用 # 格式: server.[n]=[server_ip]:[server与leader交互端口]:[server选举leader端口] # server.1=192.168.0.123:2182:2183 # server.2=192.168.0.123:2182:2183 # server.3=192.168.0.123:2182:2183 maxClientCnxns=60 minSessionTimeout=60 maxSessionTimeout=120 # purgeInterval含义: 0-禁用自动清除 1-使用自动清除 autopurge.purgeInterval=1 ESC :wq -
安装zookeeper-c
cd /usr/local/zookeeper/src/c ./configure make make install -
防火墙开启
systemctl enable firewalld systemctl start firewalld firewall-cmd --zone=public --permanent --add-port=2181/tcp firewall-cmd --reload -
单元文件
# 进入单元文件目录 cd /etc/systemd/system # 创建redis单元文件,格式为: [单元文件名].[单元文件类型] vim zookeeper.service [Unit] Description=开机启动zookeeper. After=default.target network.target [Service] User=root Group=root Type=forking PIDFile=/usr/local/zookeeper/var/log/zookeeper_server.pid ExecStart=/usr/local/zookeeper/bin/zkServer.sh start ExecReload=/usr/local/zookeeper/bin/zkServer.sh restart ExecStop=/usr/local/zookeeper/bin/zkServer.sh stop PrivateTmp=false Restart=always [Install] WantedBy=multi-user.target ESC :wq -
安装php扩展:zookeeper参考链接
cd /root wget https://pecl.php.net/get/zookeeper-0.4.0.tgz tar -zxvf zookeeper-0.4.0.tgz cd zookeeper-0.4.0/ phpize ./configure make make install -
安装php扩展libzookeeper参考链接
cd /root wget https://github.com/Timandes/libzookeeper/archive/v0.7.2.tar.gz tar -xvf v0.7.2.tar.gz cd libzookeeper-0.7.2 phpize ./configure make make install # 用来调起zookeeper-admin,仓库地址: https://github.com/Timandes/zookeeper-admin.git -
修改php.ini
vim /usr/local/php/lib/php.ini extension=libzookeeper.so extension=zookeeper.so ESC :wq -
PHP使用进程公共节点
# 出了$zc的作用域之后,节点将不存在 $zc = new \Zookeeper('127.0.0.1:2181'); //或者 //$zc = new \Zookeeper(); //$zc->connect('127.0.0.1:2181'); $zookeeper_key = '/xxx'; if ($zc->exists($zookeeper_key)) { //如果节点存在,则程序正在运行,不运行新的程序 return false; }else{ //如果节点文件不存在,则创建进程节点文件,运行程序 $acl = [ [ 'perms' => \Zookeeper::PERM_ALL,//共享节点(用来跨进程执行某个程序) 'scheme' => 'world', 'id' => 'anyone', ] ]; //尝试创建节点 //EPHEMERAL: 临时节点 //EPHEMERAL_SEQUENTIAL: 临时顺序节点 //PERSISTENT: 持久节点(暂时别用) //PERSISTENT_SEQUENTIAL: 持久顺序节点(暂时别用) $zookeeper_key_res = $zc->create($zookeeper_key, '这是节点的值', $acl, \Zookeeper::EPHEMERAL);//临时节点(可共享的) if ($zookeeper_key_res == $zookeeper_key) { //创建节点成功运行程序 //做些什么,比如等待10秒 sleep(10); //可以尝试取节点的值 //$zookeeper_val = $zc->get($zookeeper_key); //echo $zookeeper_val; $zc->delete($zookeeper_key);//其实不执行也会删除,因为这是一个临时节点,且return之后不再能取到$zc return true; } else { //创建节点失败不运行程序 return false; } }
