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+---
+title: "CentOS7 安装 zookeeper 集群"
+date: 2019-10-30T01:25:48+08:00
+lastmod: 2019-10-30T01:25:48+08:00
+keywords: []
+tags: ["zookeeper", "centos7"]
+categories: ["storage"]
+---
+
+# 环境
+
+主机名 | eth0 IP | eth1 IP | 操作系统 | ZK 版本 | myid
+---- | ---- | ---- | ---- | ---- | ----
+zk221 | 192.168.1.221 | 192.168.16.221 | CentOS7.5 | 3.4.14 | 221
+zk222 | 192.168.1.222 | 192.168.16.222 | CentOS7.5 | 3.4.14 | 222
+zk223 | 192.168.1.223 | 192.168.16.223 | CentOS7.5 | 3.4.14 | 223
+
+- 下载 [zookeeper-3.4.14](https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/zookeeper-3.4.14/zookeeper-3.4.14.tar.gz)
+- eth0 网卡用于向客户端提供服务，eth1 网卡用于 zookeeper 集群内部通信
+
+# 各节点初始配置
+
+- 关闭 selinux、防火墙
+- 部署 java 运行环境
+- 创建数据(快照日志)目录
+    ```bash
+    mkdir -p /var/lib/zookeeper/data
+    ```
+- 创建事物日志目录
+    ```bash
+    mkdir -p /var/lib/zookeeper/dataLog
+    ```
+- 创建服务日志目录
+    ```
+    mkdir -p /var/log/zookeeper
+    ```
+- 生成 myid 文件
+    ```
+    # zk221
+    echo 221 > /var/lib/zookeeper/data/myid
+    # zk222
+    echo 222 > /var/lib/zookeeper/data/myid
+    # zk223
+    echo 223 > /var/lib/zookeeper/data/myid
+    ```
+
+# 部署 zookeeper
+
+- 登陆 zk221，下载 zookeeper，解压至 /opt/ 下
+- 生成配置文件
+    ```
+    cd /opt/zookeeper/conf/
+    cp zoo_sample.cfg zoo.cfg
+    ```
+- 修改 /opt/zookeeper/conf/zoo.cfg
+    ```
+    dataDir=/var/lib/zookeeper/data
+    dataLogDir=/var/lib/zookeeper/dataLog
+    # servers
+    server.221=192.168.16.221:2888:3888
+    server.222=192.168.16.222:2888:3888
+    server.223=192.168.16.223:2888:3888
+    ```
+- 修改 /opt/zookeeper/bin/zkEnv.sh
+    ```
+    # 找到 ZOO_LOG_DIR="." 一行，换成如下
+    ZOO_LOG_DIR="/var/log/zookeeper"
+    ```
+- 打包 zookeeper 目录，复制到 zk222 和 zk223 上
+
+# 启动集群
+
+- 直接启动脚本
+    - 在每个节点上启动 zookeeper 服务
+        ```bash
+        /opt/zookeeper/bin/zkServer.sh start
+        ```
+- systemd 启动
+    - 创建 /usr/lib/systemd/system/zookeeper.service，内容如下
+        ```
+        [Unit]
+        Description=Zookeeper
+        Requires=network.service
+        After=network.service
+        [Service]
+        Environment=JAVA_HOME=/opt/jre
+        ExecStart=/opt/zookeeper/bin/zkServer.sh start-foreground
+        SuccessExitStatus=143
+        [Install]
+        WantedBy=multi-user.target
+        ```
+    - 启动 zookeeper 服务
+        ```bash
+        systemctl daemon-reload
+        systemctl start zookeeper
+        ```
+
+# 查看集群状态
+
+- 查看节点状态
+    ```bash
+    /opt/zookeeper/bin/zkServer.sh status
+    ```
+