Fabric tasks basic sample

fabfile.py

# -*- coding: utf-8 -*-
"""
Some ssh script stuff using 'fabric'

My personnal environment use ssh keys with passphrase 
(some empty, some other not) to connect to knowed hosts.

Install requires:

* Needed C build toolchain to compile C modules;
* Library libssl-dev (for OpenSSL >= 1.0.1);
* Library libffi-dev;
* Python development headers (commonly libpython-dev);
* Python package fabric >= 1.11.1;

Strange behavior noticed
************************

Using remote task prompt for a password for wrong public key. Seems fabric or
paramiko are taking the first key entry from ~/.ssh/config event it is not
related to requested host.

So i added this to .ssh/config: ::

    Host myhost
        IdentityFile ~/.ssh/id_dsa

This avoid fabric to search for a key to connect to the host.

If you use only one ssh key to connect to your knowed host, you should not need to do this.

NOTE: Mind about feeling an issue for this to fabric github.
"""

## Uncomment this to get full logs from paramiko, useful to debug problems with
## ssh authent or connection
#import logging
#logging.basicConfig(level=logging.DEBUG)

from fabric.api import *

env.use_ssh_config = True
env.hosts = ['user@myhost']


@task
def hello(name="world"):
    """Dummy task just for printing out"""
    print("Hello %s!" % name)


@task
def foo():
    """Just trying a local command"""
    local('ls -l')


@task
def bar():
    """Basic remote command on hosts and returned response attributes"""
    res = run('ls -l')
    print "command:", res.command
    print "succeeded:", res.succeeded
    print "failed:", res.failed
    print "return_code:", res.return_code


@task
def logs():
    """Trying behavior on remote command using sudo"""
    sudo('sudo ls /var/log')