Oct-02-2018, 11:44 PM
I have the code below that runs without errors, but doesn't seem to give any output after establishing the connection, nor after running exec_command to execute the command. Any thoughts on why that is?
#####################################################
# IN: hostname to connect to, username to connect as, string of command(s) to run
# OUT: array of information to parse for OS; returns nothing if not able to connect
def SSHConnect(hostname, username, command):
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
output = []
try:
Log("info", inspect.getframeinfo(inspect.currentframe()).function, "Connecting to " + hostname + " by ssh as user " + username + " t
result = ssh.connect(hostname, username=username, password=GetCreds(username), auth_timeout=30, look_for_keys=True)
print("SSH result is " + str(result))
(sdtin, stdout, stderr) = ssh.exec_command(command)
Log("info", "stdout is " + str(stdout) + ", stderr is " + str(stderr))
output = stdout.readlines()
if (stderr):
Log("err", inspect.getframeinfo(inspect.currentframe()).function, "Errors generated - " + str(stderr))
ssh.close()
except (socket.error,paramiko.AuthenticationException,paramiko.SSHException) as message:
Log("err", inspect.getframeinfo(inspect.currentframe()).function, "Error in connecting - " + message)
pass
finally:
Log("debug", inspect.getframeinfo(inspect.currentframe()).function, "Output - " + str(output))
return outputIt runs without errors, and accepts the password, but the output contains nothing. In contrast, I can ssh to it from the bash prompt and the desired command (hostname), using the same password.Output:$ rm -f /tmp/ssh.log ; ./ssh-test.py; cat /tmp/ssh.log
Starting, using ssh-test.cfg and writing to logfile /tmp/ssh.log
SSHConnect - Connecting to hostname-here by ssh as user username-here to run command(s) hostname
GetCreds - Found credentials for user username-here
SSH result is None
<module> - Finished. Duration is 0.092745 seconds.
2018-10-02 16:20:15,773 - <module> - INFO - Started ./ssh-test.py at 0.15
2018-10-02 16:20:15,773 - <module> - INFO - Using config file ssh-test.cfg
2018-10-02 16:20:15,798 - Log - INFO - SSHConnect - Connecting to ga-devarcmsdc19.ds.dtveng.net by ssh as user d401771 to run command(s) hostname
2018-10-02 16:20:15,798 - Log - DEBUG - GetCreds - Getting creds for user username-here
2018-10-02 16:20:15,798 - Log - INFO - GetCreds - Found credentials for user username-here
2018-10-02 16:20:16,168 - _log - DEBUG - starting thread (client mode): 0xb9e0510L
2018-10-02 16:20:16,168 - _log - DEBUG - Local version/idstring: SSH-2.0-paramiko_2.4.1
2018-10-02 16:20:16,188 - _log - DEBUG - Remote version/idstring: SSH-2.0-OpenSSH_7.4
2018-10-02 16:20:16,188 - _log - INFO - Connected (version 2.0, client OpenSSH_7.4)
2018-10-02 16:20:16,192 - _log - DEBUG - kex algos:[u'gss-gex-sha1-toWM5Slw5Ew8Mqkay+al2g==', u'gss-group1-sha1-toWM5Slw5Ew8Mqkay+al2g==', u'gss-group14-sha1-toWM5Slw5Ew8Mqkay+al2g==', u'curve25519-sha256', u'[email protected]', u'ecdh-sha2-nistp256', u'ecdh-sha2-nistp384', u'ecdh-sha2-nistp521', u'diffie-hellman-group-exchange-sha256', u'diffie-hellman-group16-sha512', u'diffie-hellman-group18-sha512', u'diffie-hellman-group14-sha256', u'diffie-hellman-group14-sha1'] server key:[u'ssh-rsa', u'rsa-sha2-512', u'rsa-sha2-256', u'ecdsa-sha2-nistp256', u'ssh-ed25519'] client encrypt:[u'[email protected]', u'aes128-ctr', u'aes192-ctr', u'aes256-ctr', u'[email protected]', u'[email protected]'] server encrypt:[u'[email protected]', u'aes128-ctr', u'aes192-ctr', u'aes256-ctr', u'[email protected]', u'[email protected]'] client mac:[u'[email protected]', u'[email protected]', u'[email protected]', u'[email protected]', u'[email protected]', u'[email protected]', u'[email protected]', u'hmac-sha2-256', u'hmac-sha2-512', u'hmac-sha1'] server mac:[u'[email protected]', u'[email protected]', u'[email protected]', u'[email protected]', u'[email protected]', u'[email protected]', u'[email protected]', u'hmac-sha2-256', u'hmac-sha2-512', u'hmac-sha1'] client compress:[u'none', u'[email protected]'] server compress:[u'none', u'[email protected]'] client lang:[u''] server lang:[u''] kex follows?False
2018-10-02 16:20:16,192 - _log - DEBUG - Kex agreed: ecdh-sha2-nistp256
2018-10-02 16:20:16,192 - _log - DEBUG - HostKey agreed: ssh-ed25519
2018-10-02 16:20:16,192 - _log - DEBUG - Cipher agreed: aes128-ctr
2018-10-02 16:20:16,192 - _log - DEBUG - MAC agreed: hmac-sha2-256
2018-10-02 16:20:16,192 - _log - DEBUG - Compression agreed: none
2018-10-02 16:20:16,248 - _log - DEBUG - kex engine KexNistp256 specified hash_algo <built-in function openssl_sha256>
2018-10-02 16:20:16,249 - _log - DEBUG - Switch to new keys ...
2018-10-02 16:20:16,273 - _log - DEBUG - Adding ssh-ed25519 host key for ga-devarcmsdc19.ds.dtveng.net: c9d6111e7dac37c8c1312116d0d0af62
2018-10-02 16:20:16,274 - _log - DEBUG - Trying discovered key f5c702e13542e4ad0dcc614d8f15deeb in /Users/bc143k/.ssh/id_rsa
2018-10-02 16:20:16,304 - _log - DEBUG - userauth is OK
2018-10-02 16:20:16,363 - _log - INFO - Auth banner: S
Kernel 3.10.0-862.11.6.el7.x86_64 on an x86_64
2018-10-02 16:20:16,364 - _log - INFO - Authentication (publickey) failed.
2018-10-02 16:20:16,379 - _log - DEBUG - Trying discovered key f7385028aa9a79f265ef275ab994e606 in /Users/bc143k/.ssh/id_dsa
2018-10-02 16:20:16,398 - _log - DEBUG - userauth is OK
2018-10-02 16:20:16,419 - _log - INFO - Authentication (publickey) failed.
2018-10-02 16:20:16,522 - _log - DEBUG - userauth is OK
2018-10-02 16:20:16,603 - _log - INFO - Authentication (password) successful!
2018-10-02 16:20:16,633 - _log - DEBUG - [chan 0] Max packet in: 32768 bytes
2018-10-02 16:20:17,232 - _log - DEBUG - Received global request "[email protected]"
2018-10-02 16:20:17,232 - _log - DEBUG - Rejecting "[email protected]" global request from server.
2018-10-02 16:20:17,232 - _log - DEBUG - Debug msg: Ignored authorized keys: bad ownership or modes for directory /home/bchang
2018-10-02 16:20:17,232 - _log - DEBUG - Debug msg: Ignored authorized keys: bad ownership or modes for directory /home/bchang
2018-10-02 16:20:17,233 - _log - DEBUG - [chan 0] Max packet out: 32768 bytes
2018-10-02 16:20:17,233 - _log - DEBUG - Secsh channel 0 opened.
2018-10-02 16:20:17,277 - _log - DEBUG - [chan 0] Sesch channel 0 request ok
2018-10-02 16:20:17,277 - Log - DEBUG - SSHConnect - Output - []
2018-10-02 16:20:17,278 - Log - INFO - <module> - Finished. Duration is 0.092745 seconds.
2018-10-02 16:20:17,302 - _log - DEBUG - EOF in transport thread