Python – telnet – automation APC PDU

Question

I am attempting to automation turning off connected devices to an APC PDU using python’s built in telnet functionality. I believe I am able to enter in the username and password, but I cannot proceed after that. My code is as follows:

    telnet_session = telnetlib.Telnet(host=self.apc_ip)
    self.logger.info("Entering APC Username")
    telnet_session.read_until("User Name :")
    telnet_session.write(self.apc_username + "n")
    self.logger.info("Entering APC Password")
    telnet_session.read_until("Password  :")
    telnet_session.write(self.apc_password + "n")
    sleep(2)
    print telnet_session.read_all()

I’m running windows so I believe that https://github.com/quackenbush/APC is not an option as I cannot install pexpect.

Any help would be appreciated.

Thanks,

Parth

Asked By: Parth

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Source

Answer 1

The issue was I wasn’t sending the correct end line.

In windows it’s rn, not n

Answered By: Parth

Answer 2

Hello to all happy APC Switched and Metered PDU owners and admins! 🙂

Last weekend I needed to automate outlet switching in my home lab. Here’s what I’ve got for ap7901 & ap7902 PDUs:
https://github.com/MyElectrons/PDU-Commander

A sample command, executed from bash command line or a script:

./pdu-commander.py -a 192.168.7.242 -u device -p goodpassword on:1-2,8 delay:3 off:2 get:power

Script’s output:

Address: 192.168.7.242
Unit ID: ap7902
Outlets: 16
('on', '1-2,8')
1: Outlet 1       : Outlet Turned On
2: Outlet 2       : Outlet Turned On
8: Outlet 8       : Outlet Turned On
('delay', '3')
('off', '2')
2: Outlet 2       : Outlet Turned Off
('get', 'power')
168 VA
168 Watts

There’s logging, error handling, and a big potential for growth in that little project.
New features, improvement suggestions, and pull requests are very welcome!

Cheers,

Serge

P.S. By the way Telnet seems to be always sending rn regardless the OS. I had to resort to Wireshark to believe it 🙂

P.P.S I posted this answer in the thread mentioned above too. Just in a hope it might still help someone…

Answered By: MyElectrons

Python – telnet – automation APC PDU

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