环境: CentOS 7
修改 /etc/ssh/sshd_config
vi /etc/ssh/shd_config
设置
RSAAuthentication yes
PubkeyAuthentication yes
AuthorizedKeysFile .ssh/authorized_keys
让master访问slave1,slave2
在master上生成公钥
ssh-keygen -t rsa
将id_rsa.pub 拷贝到slave1,slave2
scp id_rsa.pub hadoop@slave1:~/.ssh/id_rsa.master
scp id_rsa.pub hadoop@slave2:~/.ssh/id_rsa.master
在 slave1,slave2的 .ssh
touch authorized_keys
cat id_rsa.master >> authorized_keys
cat id_rsa.master >> authorized_keys
修改slave1,slave2上的authorized_keys权限
chmod 644 authorized_keys
修改.ssh目录的权限为755
chmod 755 .ssh
然后用master访问slave1,slave2
ssh slave1 ssh slave2
现在authorized_keys 里面的公钥有master,slave1,slave2的,所以几个节点可以互相访问。 master 上的ahthorized_keys 和 .ssh 目录的权限都要改。