从本地python脚本执行远程python脚本时出错

Question

我有一个本地python脚本，通过它我试图执行一个远程python脚本，但出现错误。这是我local python script代码：

cmd_txt = "ssh -v -i /home/user/pem_file.pem user@" + host_name + " 'cd /home/test/ && python python_file.py "+ argument1 +" "+ arguent2 +"'" 

system(cmd_txt) 

控制台输出和错误是：

OpenSSH_6.2p2, OSSLShim 0.9.8r 8 Dec 2011 
debug1: Reading configuration data /etc/ssh_config 
debug1: /etc/ssh_config line 20: Applying options for * 
debug1: /etc/ssh_config line 102: Applying options for * 
debug1: Connecting to _ port 22. 
debug1: Connection established. 
debug1: identity file /.ssh/id_rsa type 1 
debug1: identity file /.ssh/id_rsa-cert type -1 
debug1: identity file /id_dsa type -1 
debug1: identity file /id_dsa-cert type -1 
debug1: Enabling compatibility mode for protocol 2.0 
debug1: Local version string SSH-2.0-OpenSSH_6.2 
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3 
debug1: match: OpenSSH_5.3 pat OpenSSH_5* 
debug1: SSH2_MSG_KEXINIT sent 
debug1: SSH2_MSG_KEXINIT received 
debug1: kex: server->client aes128-ctr hmac-md5 none 
debug1: kex: client->server aes128-ctr hmac-md5 none 
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<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 'hostname' is known and matches the RSA host key. 
debug1: Found key in .ssh/known_hosts:13 
debug1: ssh_rsa_verify: signature correct 
debug1: SSH2_MSG_NEWKEYS sent 
debug1: expecting SSH2_MSG_NEWKEYS 
debug1: SSH2_MSG_NEWKEYS received 
debug1: Roaming not allowed by server 
debug1: SSH2_MSG_SERVICE_REQUEST sent 
debug1: SSH2_MSG_SERVICE_ACCEPT received 
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password 
debug1: Next authentication method: publickey 
debug1: Offering RSA public key: /.ssh/id_rsa 
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password 
debug1: Trying private key: .ssh/id_dsa 
debug1: Next authentication method: password 
debug1: read_passphrase: can't open /dev/tty: Device not configured 
debug1: permanently_drop_suid: 502 
ssh_askpass: exec(/usr/libexec/ssh-askpass): No such file or directory 
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password 
Permission denied, please try again. 
debug1: read_passphrase: can't open /dev/tty: Device not configured 
debug1: permanently_drop_suid: 502 
ssh_askpass: exec(/usr/libexec/ssh-askpass): No such file or directory 
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password 
Permission denied, please try again. 
debug1: read_passphrase: can't open /dev/tty: Device not configured 
debug1: permanently_drop_suid: 502 
ssh_askpass: exec(/usr/libexec/ssh-askpass): No such file or directory 
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password 
debug1: No more authentication methods to try. 
Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password). 

当我在命令行中执行ssh命令我没有得到错误，但是从Python脚本中它会抛出错误。有一点需要注意的是，当我从终端执行它时，我得到一个通知来输入密码，但是从python中我什么也没有得到，也不知道如何将密码与ssh一起传递。

此外，远程python脚本反过来包含另一个ssh调用java jar执行。该呼叫的结构类似于上述呼叫ssh。

什么在这里做错了，以及如何解决这个问题？ `

Answer 1

您的公钥验证不起作用。这就是为什么当您在终端中尝试命令时，它会询问您的密码。 这条线在日志中显示的验证方法的顺序，它会尝试：

认证，可以继续：公钥，GSSAPI-keyex，GSSAPI与 - 麦克风，密码

你怎么看密码是最后一个，所以如果一切都失败了，它就会回落。

当您尝试从Python脚本执行此操作时，无法启动交互式进程来询问您的密码，以便完全失败。 这就是此行的意思：

DEBUG1：read_passphrase：无法打开/ dev/tty的：设备未配置

你需要修复的公钥认证，所以当你的ssh它的工作原理一个终端，然后再尝试使用Python脚本进行工作。