我正在尝试在3个ec2实例（node1，node2，node3）上启动一个vertica集群，这需要通过实例之间的ssh进行root登录。
在node1上，主节点...作为root用户，我使用g = {[2015, 4]=>90, [2015, 5]=>133, [2015, 6]=>131, [2015, 7]=>28,
[2015, 8]=>45, [2015, 9]=>6}
h = g.keys.sort.each_with_object(Hash.new(0)) {|k,h| h[k]=g[k]+ h[previous(k)]}
#=> {[2015, 4]=>90, [2015, 5]=>223, [2015, 6]=>354, [2015, 7]=>382,
# [2015, 8]=>427, [2015, 9]=>433}
h.update(h) { |_,v| round_to_nearest(v, 5) }
#=> {[2015, 4]=>90, [2015, 5]=>225, [2015, 6]=>355, [2015, 7]=>380,
# [2015, 8]=>425, [2015, 9]=>435}
def previous((year, month))
month -= 1
(year -=1; month = 12) if month.zero?
[year, month]
end
def round_to_nearest(n, d)
d*(n/d.to_f).round
end
在node2和node3上，我编辑了ssh-keygen文件：
/etc/ssh/sshd_config然后将id_rsa.pub密钥添加到RSAAuthentication yes
PubkeyAuthentication yes
PasswordAuthentication no`
和/root/.ssh/authorized_keys
然后做了
/home/ec2-user/.ssh/authorized_keys我尝试从node1登录service sshd restart
...但我一直收到此错误：
ssh root@node2编辑：
还将permitrootlogin更改为：
Permission denied (publickey,gssapi-keyex,gssapi-with-mic).
在ssh上做了-v，这是我看到的
PermitRootLogin without-password
我看到它试图使用id_dsa ...但是我没有那个文件...我有一个名为 [root@ip-10-205-119-236 .ssh]# ssh -v root@10.205.117.61
OpenSSH_5.3p1, OpenSSL 1.0.1e-fips 11 Feb 2013
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to 10.205.117.61 [10.205.117.61] port 22.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug1: identity file /root/.ssh/identity type -1
debug1: identity file /root/.ssh/identity-cert type -1
debug1: identity file /root/.ssh/id_rsa type -1
debug1: identity file /root/.ssh/id_rsa-cert type -1
debug1: identity file /root/.ssh/id_dsa type -1
debug1: identity file /root/.ssh/id_dsa-cert type -1
debug1: identity file /root/.ssh/id_ecdsa type -1
debug1: identity file /root/.ssh/id_ecdsa-cert type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3
debug1: match: OpenSSH_5.3 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.3
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-sha1 none
debug1: kex: client->server aes128-ctr hmac-sha1 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<2048<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Host '10.205.117.61' is known and matches the RSA host key.
debug1: Found key in /root/.ssh/known_hosts:1
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic
debug1: Next authentication method: gssapi-keyex
debug1: No valid Key exchange context
debug1: Next authentication method: gssapi-with-mic
debug1: Unspecified GSS failure. Minor code may provide more information
Credentials cache file '/tmp/krb5cc_0' not found
debug1: Unspecified GSS failure. Minor code may provide more information
Credentials cache file '/tmp/krb5cc_0' not found
debug1: Unspecified GSS failure. Minor code may provide more information
debug1: Unspecified GSS failure. Minor code may provide more information
Credentials cache file '/tmp/krb5cc_0' not found
debug1: Next authentication method: publickey
debug1: Trying private key: /root/.ssh/identity
debug1: Trying private key: /root/.ssh/id_rsa
debug1: read PEM private key done: type RSA
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic
debug1: Trying private key: /root/.ssh/id_dsa
debug1: Trying private key: /root/.ssh/id_ecdsa
debug1: No more authentication methods to try.
Permission denied (publickey,gssapi-keyex,gssapi-with-mic).
的文件，这就是我命名的文件......
答案 0 :(得分：0)
SSH要求对这些文件具有非常精确的访问权限，因为如果它们不同，则存在安全问题。您需要~/.ssh只能由您访问，authorized_keys无法由其他人编写：
chmod 700 ~/.ssh
chmod 644 ~/.ssh/authorized_keys
应该修复它。