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Wrapper library over paramiko to allow remote execution of tasks. Supports parallel execution on multiple hosts

Project description

Small wrapper library over paramiko that allows for parallel execution of SSH commands on remote hosts and executing simple single host commands over SSH.

parallel-ssh uses asychronous network requests, there is _no_ multi-threading or multi-processing used. This is a _requirement_ for commands on many (hundreds) of hosts which would grind a system to a halt simply by having so many processes/threads all wanting to execute if done with multi-threading/processing.


To install gevent you need the libevent-dev package installed. Instructions below are for apt-get systems, substitute with your own package manager if necessary.

$ sudo apt-get install libevent-dev
$ pip install parallel-ssh

Usage Example

>>> from pssh import ParallelSSHClient
>>> hosts = ['myhost1', 'myhost2']
>>> client = ParallelSSHClient(hosts)
>>> cmds = client.exec_command('ls -ltrh /tmp/aasdfasdf', sudo = True)
>>> print [client.get_stdout(cmd) for cmd in cmds]
[localhost]     drwxr-xr-x  6 xxx xxx 4.0K Jan  1 00:00 xxx
[{'localhost': {'exit_code': 0}}]

SFTP support

SFTP is supported (scp version 2 protocol) natively, no scp command used.

For example to copy a local file to remote hosts in parallel

>>> from pssh import ParallelSSHClient
>>> hosts = ['myhost1', 'myhost2']
>>> client = ParallelSSHClient(hosts)
>>> client.copy_file('../test', 'test_dir/test')
>>> client.pool.join()
Copied local file ../test to remote destination myhost1:test_dir/test
Copied local file ../test to remote destination myhost2:test_dir/test

Project details

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