hadoop - 在 docker 容器中运行 HDFS 伪模式

Question

我正在尝试在 docker 容器中以伪模式运行 HDFS，并配置了以下页面:https://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/SingleCluster.html#Pseudo-Distributed_Operation ，但我没有使用 start-all.sh 脚本，因为它不应该能够执行 ssh，所以我手动运行命令 bin/hdfs --daemon start namenode| datanode 来一一启动它们。问题是我可以看到 namenode 成功启动，但 datanode 退出时没有任何错误消息。来自datanode的最后一条日志是:

...
2018-04-09 21:04:03,830 INFO org.apache.hadoop.hdfs.server.datanode.checker.ThrottledAsyncChecker: Scheduling a check for [DISK]file:/apps/hadoop/hdfs/data
2018-04-09 21:04:04,188 INFO org.apache.hadoop.metrics2.impl.MetricsConfig: loaded properties from hadoop-metrics2.properties
2018-04-09 21:04:04,296 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Scheduled Metric snapshot period at 10 second(s).
2018-04-09 21:04:04,296 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: DataNode metrics system started
2018-04-09 21:04:04,665 INFO org.apache.hadoop.hdfs.server.common.Util: dfs.datanode.fileio.profiling.sampling.percentage set to 0. Disabling file IO profiling
2018-04-09 21:04:04,667 INFO org.apache.hadoop.hdfs.server.datanode.BlockScanner: Initialized block scanner with targetBytesPerSec 1048576
2018-04-09 21:04:04,671 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Configured hostname is hdfs
2018-04-09 21:04:04,671 INFO org.apache.hadoop.hdfs.server.common.Util: dfs.datanode.fileio.profiling.sampling.percentage set to 0. Disabling file IO profiling
2018-04-09 21:04:04,677 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Starting DataNode with maxLockedMemory = 0
2018-04-09 21:04:04,733 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Opened streaming server at /0.0.0.0:9866
2018-04-09 21:04:04,735 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Balancing bandwidth is 10485760 bytes/s
2018-04-09 21:04:04,735 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Number threads for balancing is 50

core-site.xml 文件:

<configuration>
    <property>
        <name>fs.defaultFS</name>
        <value>hdfs://localhost</value>
    </property>
</configuration>

而hdfs-site.xml是

<configuration>
    <property>
        <name>dfs.replication</name>
        <value>1</value>
    </property>

    <property>
        <name>dfs.namenode.name.dir</name>
        <value>/apps/hadoop/hdfs/name</value>
    </property>

    <property>
        <name>dfs.datanode.data.dir</name>
        <value>/apps/hadoop/hdfs/data</value>
    </property>
</configuration>

我从那里漏掉了什么吗？

Answer 1

我认为这是基础镜像问题，我使用的是 alpine，一旦我换成 centos，datanode 就可以了!一定是 alpine 缺少的东西，如果有人知道它是什么，我将不胜感激，因为基于 centos 的图像最终会比 alpine 大得多。