CODEWITHSUNDEEP
pythonloggingsyslog
Soviero
Soviero

Reputation: 1902

Printing Function Output to Syslog?

I want to make it so that the "stdout" and "stderr" output from "check_call()" is sent to Syslog. Is this possible?

Code:

def command(cmd, err=None, ifexit=False):
    try:
        check_call(shlex.split(cmd), stdout=null, stderr=null)

    except CalledProcessError:
        if err != None:
            print err

        if ifexit == True:
            exit(1)

Upvotes: 2

Views: 3769

Answers (2)

cirrusio
cirrusio

Reputation: 590

I came across this in 2017 so I thought it might be good to go ahead and update this for Python 3 as the solution needs slight modification. In order to be able to utilize the SysLogHandler in Python 3, you will have to adjust the code as follows:

 import logging
 import logging.handlers as handlers

 handler = handlers.SysLogHandler(address='/dev/log')
 logger = logging.getLogger('myApplication')
 logger.setLevel(logging.DEBUG)
 logger.addHandler(handler)

As detailed here, SysLogHandler class

Returns a new instance of the SysLogHandler class intended to communicate with a remote Unix machine whose address is given by address in the form of a (host, port) tuple. If address is not specified, ('localhost', 514) is used. The address is used to open a socket. An alternative to providing a (host, port) tuple is providing an address as a string, for example ‘/dev/log’. In this case, a Unix domain socket is used to send the message to the syslog.

Upvotes: 1

mdeous
mdeous

Reputation: 18029

Yes it is possible, but i think you would need to use Popen instead of check_call, and send the process' stdout and stderr to a properly configured logger. Such a logger would use logging.handlers.SysLogHandler to send messages to your syslog server. Here is a short example of how such a logger could be created:

import logging

handler = logging.handlers.SysLogHandler()
logger = logging.getLogger('myApplication')
logger.setLevel(logging.DEBUG)
logger.addHandler(handler)

And here is an example of how you could replace check_call with Popen and send the data to the logger:

process = Popen(shlex.split(cmd), stdout=PIPE, stderr=PIPE)
# Popen.wait() waits for the command to complete and 
# returns the command's return code
if process.wait() != 0:
    print "AN ERROR OCCURED"
logger.error(process.stderr)
logger.info(process.stdout)

Upvotes: 2

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