I'm going to install check_mk plugin by writing a simple fabfile like this:

from fabric.api import env, run, roles, execute, parallel

env.roledefs = {
    'monitoring': ['192.168.3.118'],
    'mk-agent': ['192.168.3.230', '192.168.3.231', '192.168.3.232']
}

@roles('monitoring')
def mk():
    run('[ -f check_mk-1.1.12p7.tar.gz ] || wget http://mathias-kettner.de/download/check_mk-1.1.12p7.tar.gz')
    run('[ -d check_mk-1.1.12p7 ] || tar zxvf check_mk-1.1.12p7.tar.gz')
    run('cd check_mk-1.1.12p7 && sudo ./setup.sh')

@parallel    
@roles('mk-agent')
def mk_agent():
    run('[ `rpm -qa | grep -c xinetd` -eq 0 ] && sudo yum -y install xinetd.x86_64')
    run('sudo rpm -ivh http://mathias-kettner.de/download/check_mk-agent-1.2.0b2-1.noarch.rpm') 

def check_mk():
    execute(mk)
    execute(mk_agent)

But, as you can guess, if the xinetd package is already installed, Fabric will be stopped with below errors:

Fatal error: run() received nonzero return code 1 while executing!

Requested: [ `rpm -qa | grep -c xinetd` -eq 0 ] && sudo yum -y install xinetd.x86_64
Executed: /bin/bash -l -c "[ \`rpm -qa | grep -c xinetd\` -eq 0 ] && sudo yum -y install xinetd.x86_64"

Aborting.

Is there any solution in this situation?

python fabric exitstatus
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