Bugfix/logloss

[codytipton]

Make ConcurrentRotatingFileHandler the default in netuitive-agent.conf. 3rd of 3 PR's fixing Netuitive/netuitive-diamond#63

Do not merge until Netuitive/netuitive-diamond#93 merged into master.

[rclagett]

What determines the filename of the old copies of logs? With the TimedRotatingFileHandler, a date was appended, which was always unique given rotation was time based.

[codytipton]

/opt/netuitive-agent/embedded/lib/python2.7/concurrent_log_handler/init.py
@rclagett From init.py in concurrent_log_handler, in def doRollover(self)

        for i in range(self.backupCount - 1, 0, -1):
            sfn = "%s.%d" % (self.baseFilename, i)
            dfn = "%s.%d" % (self.baseFilename, i + 1)
            if os.path.exists(sfn + gzip_ext):
                do_rename(sfn, dfn)
        dfn = self.baseFilename + ".1"
        do_rename(tmpname, dfn)

at each rotation, the penultimate log will be, in our case, netuitive-agent.log.1. If netuitive-agent.log.1 existed prior to this rotation, that log will be moved (renamed) to netuitive-agent.log.2; while the most recently active log will take its place at netuitive-agent.log.1, and so on. The limit to backlogs is set in the config.

args = ('/opt/netuitive-agent/log/netuitive-agent.log', 'a', 512*1024, 5)

where the last argument, 5, is the upper limit.