CentOS7.X安装zookeeper-3.4.11

2021-12-19 03:54:48

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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;
    }
}

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