How to parse nagios status.dat file?

Question

I\'d like to parse status.dat file for nagios3 and output as xml with a python script. The xml part is the easy one but how do I go about parsing the file? Use multi line re

Answer 1

Having shamelessly stolen from the above examples, Here's a version build for Python 2.4 that returns a dict containing arrays of nagios sections.

def parseConf(source):
    conf = {}
    patID=re.compile(r"(?:\s*define)?\s*(\w+)\s+{")
    patAttr=re.compile(r"\s*(\w+)(?:=|\s+)(.*)")
    patEndID=re.compile(r"\s*}")
    for line in source.splitlines():
        line=line.strip()
        matchID = patID.match(line)
        matchAttr = patAttr.match(line)
        matchEndID = patEndID.match( line)
        if len(line) == 0 or line[0]=='#':
            pass
        elif matchID:
            identifier = matchID.group(1)
            cur = [identifier, {}]
        elif matchAttr:
            attribute = matchAttr.group(1)
            value = matchAttr.group(2).strip()
            cur[1][attribute] = value
        elif matchEndID and cur:
            conf.setdefault(cur[0],[]).append(cur[1])              
            del cur
    return conf

To get all Names your Host which have contactgroups beginning with 'devops':

nagcfg=parseConf(stringcontaingcompleteconfig)
hostlist=[host['host_name'] for host in nagcfg['host'] 
          if host['contact_groups'].startswith('devops')]