check_ceph_status.py 文件源码

def check_file_freshness(filename, newer_than=3600):
    """
    Check a file exists, is readable and is newer than <n> seconds (where
    <n> defaults to 3600).
    """
    # First check the file exists and is readable
    if not os.path.exists(filename):
        raise CriticalError("%s: does not exist." % (filename))
    if os.access(filename, os.R_OK) == 0:
        raise CriticalError("%s: is not readable." % (filename))

    # Then ensure the file is up-to-date enough
    mtime = os.stat(filename).st_mtime
    last_modified = time.time() - mtime
    if last_modified > newer_than:
        raise CriticalError("%s: was last modified on %s and is too old "
                            "(> %s seconds)."
                            % (filename, time.ctime(mtime), newer_than))
    if last_modified < 0:
        raise CriticalError("%s: was last modified on %s which is in the "
                            "future."
                            % (filename, time.ctime(mtime)))