[root@localhost sbin]# ./start-dfs.sh
Starting namenodes on [hadoop1]
hadoop1: starting namenode, logging to /home/hbase/hadoop-2.8.5/logs/hadoop-root-namenode-localhost.localdomain.out
Attempting to start secure cluster, skipping datanodes. Run start-secure-dns.sh as root to complete startup.
Starting secondary namenodes [localhost]
localhost: starting secondarynamenode, logging to /home/hbase/hadoop-2.8.5/logs/hadoop-root-secondarynamenode-localhost.localdomain.out

后来查了一下要单独启动datanode

./hadoop-daemon.sh start datanode

[root@hadoop1 sbin]# jps
17680 HRegionServer
22320 Jps
21185 SecondaryNameNode
21876 NodeManager
21015 NameNode
21483 DataNode
20894 QuorumPeerMain
21774 ResourceManager