hdfs dfsadmin自动化测试脚本

以下是一个简单的HDFS dfsadmin自动化测试脚本，可以用于测试HDFS集群的健康状态：

#!/bin/bash

# 检查HDFS NameNode是否健康
hdfs dfsadmin -report | grep "Name:" | awk '{print $2}' | while read -r namenode; do
    echo "Testing NameNode: $namenode"
    hdfs dfsadmin -fs "hdfs://$namenode" -report > /dev/null
    if [ $? -eq 0 ]; then
        echo "NameNode $namenode is healthy"
    else
        echo "NameNode $namenode is unhealthy"
    fi
done

# 检查HDFS DataNode是否健康
hdfs dfsadmin -report | grep "Name:" | awk '{print $2}' | while read -r namenode; do
    echo "Testing DataNodes on NameNode: $namenode"
    hdfs dfsadmin -fs "hdfs://$namenode" -report > /tmp/hdfs-dn-report.tmp
    grep "^Datanodes available:" /tmp/hdfs-dn-report.tmp | awk '{print $3}' | while read -r num_datanodes; do
        for (( i=0; i<$num_datanodes; i++ )); do
            datanode=$(grep "^Hostname:" /tmp/hdfs-dn-report.tmp | awk '{print $2}' | sed -n "$((i+1))p")
            echo "Testing DataNode: $datanode"
            hdfs dfsadmin -fs "hdfs://$namenode" -Ddfs.datanode.hostname="$datanode" -report > /dev/null
            if [ $? -eq 0 ]; then
                echo "DataNode $datanode is healthy"
            else
                echo "DataNode $datanode is unhealthy"
            fi
        done
    done
done

此脚本会检查每个NameNode和其上的所有DataNode的健康状态，并输出结果。你可以将其保存为一个文件，比如`hdfs-dfsadmin-test.sh`，并通过`bash hdfs-dfsadmin-test.sh`运行。请注意，你需要在所有的NameNode上运行此脚本，以确保整个集群的健康状态。