ssh免登陆相关有关问题

配置过ssh免登陆后，启动hadoop还是报错了

[hadoop@spark1 sbin]$ ./start-dfs.sh 

17/04/09 17:41:24 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

Starting namenodes on [spark1]

The authenticity of host 'spark1 (192.168.10.91)' can't be established.

RSA key fingerprint is 14:89:07:e9:b0:99:3e:a9:ef:0b:1c:a1:6a:92:ee:24.

Are you sure you want to continue connecting (yes/no)? no

spark1: Host key verification failed.

spark2: starting datanode, logging to /usr/local/hadoop/logs/hadoop-hadoop-datanode-spark02.out

spark3: starting datanode, logging to /usr/local/hadoop/logs/hadoop-hadoop-datanode-spark03.out

Starting secondary namenodes [spark1]

The authenticity of host 'spark1 (192.168.10.91)' can't be established.

RSA key fingerprint is 14:89:07:e9:b0:99:3e:a9:ef:0b:1c:a1:6a:92:ee:24.

Are you sure you want to continue connecting (yes/no)? no

spark1: Host key verification failed.

17/04/09 17:43:46 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

原因是忘记执行

# vi /etc/ssh/sshd_config

放开注释的配置

RSAAuthentication yes

PubkeyAuthentication yes

AuthorizedKeysFile      .ssh/authorized_keys