How to set Zookeeper permissions on CentOS

To safely configure ZooKeeper permissions on CentOS system, you need to follow the following steps:

Step 1: Install ZooKeeper

First, make sure ZooKeeper is installed. If not installed, use the following command to install:

sudo yum install zookeeper zookeeper-server

Step 2: Configure ZooKeeper

Edit the ZooKeeper configuration file /etc/zookeeper/conf/zoo.cfg to ensure the configuration is correct. The following is an example configuration:

<code>tickTime=2000 dataDir=/var/lib/zookeeper clientPort=2181 initLimit=5 syncLimit=2 server.1=zoo1:2888:3888 server.2=zoo2:2888:3888 server.3=zoo3:2888:3888 ``` 请根据实际情况修改服务器地址（`server.1`, `server.2`, `server.3`）。 **第三步：创建目录**创建ZooKeeper数据目录和日志目录，并设置权限： ```bash sudo mkdir -p /var/lib/zookeeper sudo mkdir -p /var/log/zookeeper sudo chown -R zookeeper:zookeeper /var/lib/zookeeper sudo chown -R zookeeper:zookeeper /var/log/zookeeper</code>

Step 4: SELinux configuration (if enabled)

If SELinux is in enforcing mode, you need to configure SELinux policies. It is recommended to temporarily set to permissive mode test first:

sudo setenforce 0

After the test is successful, create a permanent SELinux policy module:

sudo ausearch -c 'zookeeper' --raw | audit2allow -M zookeeper_selinux
sudo semodule -i zookeeper_selinux.pp

Step 5: Start the ZooKeeper service

Start the ZooKeeper service and check the status:

sudo systemctl start zookeeper
sudo systemctl status zookeeper

Step 6: Permission Verification

Verify that the ZooKeeper process can access the data directory and log directory:

sudo -u zookeeper ls -l /var/lib/zookeeper
sudo -u zookeeper ls -l /var/log/zookeeper

Step 7: Firewall configuration (if enabled)

If you enable the firewall, open the ZooKeeper port (default 2181):

sudo firewall-cmd --permanent --zone=public --add-port=2181/tcp
sudo firewall-cmd --reload

Step 8: Log Check

If you have any questions, please check the log file /var/log/zookeeper/zookeeper.out for more information.

Through the above steps, you can safely configure ZooKeeper permissions on the CentOS system. Please be sure to adjust the configuration according to your actual environment, especially the server address and SELinux part.

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