zookeeper
==================================


* https://zookeeper.apache.org/
* https://zookeeper.apache.org/releases.html


集群安装
-------------------------------

修改所有节点的hosts文件：

.. code-block:: text

    10.196.126.23 zookeeper-1
    10.196.126.24 zookeeper-2
    10.196.126.25 zookeeper-3

.. code-block:: bash

    cd /root/
    tar zxvf apache-zookeeper-3.8.4-bin.tar.gz
    cd apache-zookeeper-3.8.4

修改配置文件

.. code-block:: bash

    cp conf/zoo_sample.cfg conf/zoo.cfg
    vim zoo.cfg

三个节点的zoo.cfg都配置成下面的样子：

.. code-block:: text

    tickTime=2000
    dataDir=/var/lib/zookeeper
    clientPort=2181
    initLimit=5
    syncLimit=2
    server.1=zookeeper-1:2888:3888
    server.2=zookeeper-2:2888:3888
    server.3=zookeeper-3:2888:3888


.. code-block:: bash

    mkdir -p /var/lib/zookeeper


分别到每个节点上的zk的数据目录下创建myid文件：

注意要替换myid中的数字

.. code-block:: bash

    echo "1" > /var/lib/zookeeper/myid
    echo "2" > /var/lib/zookeeper/myid
    echo "3" > /var/lib/zookeeper/myid

启动zk：

.. code-block:: bash

    bin/zkServer.sh start