I am new to python and working on trying to make a script which checks if a specified host as for example sensu-client exist. I use a deployment software called NSO and run it by: nso status and it shows me this information:
nagios-client host nagios-client down
test host test down
Is there any possibility to make a script to check if for example nagios-Client exist with a script ?
In shell I do it by:
nso status | awk '{ print $1 }'
In this case I would suggest using subprocess' check_output function. The documentation is here. check_output can return, as a string the shell output of a command. So you would have something like this:
import subprocess
foo=subprocess.check_output(['nso', 'status', '|', 'awk', '\'{ print $1 }\''], shell=True)
#Thanks bereal for shell=True
print foo
Of course, if your only targeting linux, you could use the much easier sh module. It allows you to import programs as if they were libraries.
shell=True for this pipe to work.you can use subprocess to run this command and parse the output
import subprocess
command = ['nso', 'status', '|', 'awk', '\'{ print $1 }\'']
p1 = subprocess.Popen(command, stdout=subprocess.PIPE)
command to first in your code, so you should probably pick one, otherwise it will throw an errorYou don't have to run awk, since you're already in Python:
import subprocess
proc = subprocess.Popen(['nso', 'status'], stdout=subprocess.PIPE)
# get stdout as a EOL-separated string, ignore stderr for now
out, _ = proc.communicate()
# parse the output, line.split()[0] is awk's $1
items = [line.split()[0] for line in out.split('\n')]
