Debian HBase集群搭建方法

Prerequisites
Before starting, ensure all cluster nodes (master and region servers) meet the following requirements:

• Network Connectivity: Nodes can communicate via hostname (add entries to /etc/hosts if needed).
• Time Synchronization: Install and configure ntp or chrony to keep system clocks in sync.
• SSH Access: Enable passwordless SSH between nodes for HBase master/worker communication.
• Java Environment: Install OpenJDK 8 or 11 on all nodes. Verify with java -version.
• Hadoop & ZooKeeper: Deploy a running Hadoop HDFS cluster (for distributed storage) and ZooKeeper ensemble (for coordination). HBase relies on these services.

Step 1: Download and Install HBase

1. Choose a stable HBase version (e.g., 2.4.x) from the Apache HBase website.
2. Download and extract the tarball on all nodes (master and region servers):

   wget https://archive.apache.org/dist/hbase/2.4.9/hbase-2.4.9-bin.tar.gz
   tar -xzvf hbase-2.4.9-bin.tar.gz -C /opt
   sudo mv /opt/hbase-2.4.9 /usr/local/hbase
   

3. Set ownership to the current user for easier management:

   sudo chown -R $USER:$USER /usr/local/hbase
   

Step 2: Configure Environment Variables
Edit the ~/.bashrc file (or /etc/profile for system-wide access) to add HBase environment variables:

export HBASE_HOME=/usr/local/hbase
export PATH=$PATH:$HBASE_HOME/bin

Apply changes immediately:

source ~/.bashrc

Step 3: Configure HBase Core Files

1. Edit hbase-env.sh (located in $HBASE_HOME/conf):
   • Set JAVA_HOME to your JDK path (e.g., /usr/lib/jvm/java-11-openjdk-amd64).
   • Disable HBase’s built-in ZooKeeper (since you’re using an external ensemble):

     export HBASE_MANAGES_ZK=false
     

2. Edit hbase-site.xml (critical for cluster setup):
   Add the following properties to define HBase’s distributed mode, data storage, and ZooKeeper integration:

   <
       configuration>
       
     <
       !-- Root directory for HBase data in HDFS -->
       
     <
       property>
       
       <
       name>
       hbase.rootdir<
       /name>
       
       <
       value>
       hdfs://namenode:8020/hbase<
       /value>
        <
       !-- Replace with your NameNode hostname/IP -->
       
     <
       /property>
       
     <
       !-- Enable distributed mode -->
       
     <
       property>
       
       <
       name>
       hbase.cluster.distributed<
       /name>
       
       <
       value>
       true<
       /value>
       
     <
       /property>
       
     <
       !-- External ZooKeeper quorum (comma-separated list of ZooKeeper nodes) -->
       
     <
       property>
       
       <
       name>
       hbase.zookeeper.quorum<
       /name>
       
       <
       value>
       zookeeper1,zookeeper2,zookeeper3<
       /value>
        <
       !-- Replace with your ZooKeeper hostnames/IPs -->
       
     <
       /property>
       
     <
       !-- Directory for ZooKeeper local data -->
       
     <
       property>
       
       <
       name>
       hbase.zookeeper.property.dataDir<
       /name>
       
       <
       value>
       /var/lib/zookeeper<
       /value>
        <
       !-- Ensure this directory exists on all ZooKeeper nodes -->
       
     <
       /property>
       
   <
       /configuration>
       
   

3. Configure regionservers (list all region server nodes):
   Edit $HBASE_HOME/conf/regionservers and add each region server’s hostname (one per line). The master node is not included here by default.

Step 4: Start Hadoop and ZooKeeper
Before launching HBase, ensure HDFS and ZooKeeper are running:

1. Start HDFS: On the NameNode, run:

   hdfs namenode -format  # Format HDFS (only needed once)
   start-dfs.sh           # Start HDFS daemons (NameNode, DataNodes)
   start-yarn.sh          # Start YARN (if using MapReduce)
   

2. Start ZooKeeper: On each ZooKeeper node, run:

   zkServer.sh start
   

   Verify ZooKeeper status with zkServer.sh status (ensure at least one node is in “leader” mode).

Step 5: Start HBase Cluster
On the HBase master node, execute the following command to start all HBase services:

start-hbase.sh

This script starts the HMaster (manages the cluster) and RegionServers (handle data storage) on their respective nodes.

To verify processes are running, use jps on each node:

• Master node: Should show HMaster.
• Region server nodes: Should show HRegionServer.

Step 6: Validate the Cluster

1. Access HBase Shell: Run the following command on any node (master or region server):

   hbase shell
   

2. Check Cluster Status: In the HBase shell, execute:

   status
   

   You should see output indicating the number of region servers, HMaster status, and ZooKeeper connection details.
3. Test Basic Operations: Create a table, insert data, and query it to confirm functionality:

   create 'test_table', 'cf'  # Create a table named 'test_table' with column family 'cf'
   put 'test_table', 'row1', 'cf:col1', 'value1'  # Insert data
   get 'test_table', 'row1'  # Retrieve data
   

Post-Installation Checks

• Logs: Monitor HBase logs (located in $HBASE_HOME/logs) for errors or warnings.
• Web UI: Access the HBase master web interface at http://< master-node-ip> :16010 (default port) to view cluster metrics.
• Firewall: Allow required ports (e.g., 16000-16030 for HBase, 2181-2186 for ZooKeeper, 50070 for HDFS) using ufw or your firewall tool.

Key Notes for Production

• High Availability: Configure multiple HMaster nodes and ZooKeeper ensemble (odd number of nodes) for fault tolerance.
• Performance Tuning: Adjust parameters like hbase.regionserver.handler.count (handler threads), hbase.hregion.memstore.flush.size (flush threshold), and compression (hbase.hregion.compress.algo) based on your hardware and workload.
• Monitoring: Use tools like Prometheus + Grafana or Ambari to track cluster health (e.g., RegionServer load, memory usage).

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