hadoop3.0-HA搭建，3節(jié)點(diǎn)。關(guān)閉防火墻 systemctl stop firewalld.service 關(guān)閉防火墻開機(jī)啟動 systemctl disable firewalld.service 禁用selinux安全 查看狀態(tài)：sestatus 臨時(shí)關(guān)閉: setenforce 0 永久關(guān)閉：vi /etc/sysconfig/selinux SELINUX=disabled