问题：
为cdh新增节点时，在分配datanode后，启动报错
Can't open /iot/opt/cloudera-manager/cm-5.11.2/run/cloudera-scm-agent/process/642-hdfs-DATANODE/config.zip: 权限不够. Can't open /iot/opt/cloudera-manager/cm-5.11.2/run/cloudera-scm-agent/process/642-hdfs-DATANODE/proc.json: 权限不够.Can't open
