+ Параметры, работа в режиме демона

src/main.py

@@ -2,41 +2,94 @@
 import os
 from shutil import disk_usage
 import time
+import argparse
 
 BS = 1024**2
 
-def set_utilization(fs, utilization_percent=0.6, baloon_filename='baloon', hysteresis_percent=0.01):
+def set_utilization(fs, utilization_percent=0.6, baloon_filename='baloon', hysteresis_percent=0.01, quiet=False):
     fs = os.path.realpath(fs)
     du = disk_usage(fs)
     if utilization_percent < 0.1 or utilization_percent > 0.9:
         raise ValueError('utilization_percent must be between 0.1 and 0.9')
-    if hysteresis_percent < 0.0001 or hysteresis_percent > 0.1:
+    if hysteresis_percent < 0 or hysteresis_percent > 0.1:
-        raise ValueError('hysteresis_percent must be between 0.0001 and 0.1')
+        raise ValueError('hysteresis_percent must be between 0 and 0.1')
     hysteresis = int(du.total * hysteresis_percent)
     if hysteresis < BS: hysteresis = BS
+    to_be_wasted = int(((du.used+du.free) * utilization_percent) - ((du.used+du.free) - du.free))
+    if not quiet:
         print(f'hysteresis: {hysteresis}bytes')
         print(f'total: {round(du.total/ 2**30, 3)}GB, used: {round(du.used/ 2**30, 3)}GB, free: {round(du.free/ 2**30, 3)}GB usage: {round(du.used * 100 / (du.used+du.free), 3)}%')
-    to_be_wasted = int(((du.used+du.free) * utilization_percent) - ((du.used+du.free) - du.free))
         print(f'to_be_wasted: {round(to_be_wasted/ 2**30, 3)}GB ')
     if to_be_wasted < -hysteresis:
         to_be_trimmed = abs(to_be_wasted)
         baloon_size = os.path.getsize(os.path.join(fs, baloon_filename))
         if  baloon_size> to_be_trimmed:
             os.truncate(os.path.join(fs, baloon_filename), baloon_size - to_be_trimmed)
-            print(f'trimmed {to_be_trimmed} Bytes')
+            if not quiet: print(f'trimmed {to_be_trimmed} Bytes')
-        else: print(f'can\'t trim {baloon_size} < {to_be_trimmed}Bytes')
+        elif not quiet: print(f'can\'t trim {baloon_size} < {to_be_trimmed}Bytes')
     elif to_be_wasted > hysteresis:
         with open(os.path.join(fs, baloon_filename) , 'ab') as f:
             last = 0
             writed = to_be_wasted
             while to_be_wasted > 0:
                 if time.time() - last > 1:
-                    print(f'left {int(to_be_wasted/ 2**30)}GB                    \r', end='')
+                    if not quiet: print(f'left {int(to_be_wasted/ 2**30)}GB                    \r', end='')
                     last = time.time()                          
                 write_size = min(to_be_wasted, BS)
                 f.write(b'x' * write_size)
                 to_be_wasted -= write_size
-            print(f'Done, added {writed} bytes')
+            if not quiet: print(f'Done, added {writed} bytes')
+    if not quiet:
+        du = disk_usage(fs)
+        print(f'total: {round(du.total/ 2**30, 3)}GB, used: {round(du.used/ 2**30, 3)}GB, free: {round(du.free/ 2**30, 3)}GB usage: {round(du.used * 100 / (du.used+du.free), 3)}%')
                 
+def hysteresis_type(arg):
+    MAX_VAL = 10
+    MIN_VAL = 0
+    try:
+        f = float(arg)
+    except ValueError:
+        raise argparse.ArgumentTypeError("Must be a floating point number")
+    if f < MIN_VAL or f > MAX_VAL:
+        raise argparse.ArgumentTypeError("Argument must be < " + str(MAX_VAL) + " and > " + str(MIN_VAL))
+    return f
 
+parser = argparse.ArgumentParser(description='Baloon utilize your disk space')
+parser.add_argument('-v', '--version', action='version', version='%(prog)s 1.0')
+parser.add_argument('-u', '--utilization', type=int, metavar="[10-90]", choices=range(10, 91), help='percentage of utilization', default=60)
+parser.add_argument('-b', '--baloon', type=str, metavar="baloon", help='name of the baloon file', default='baloon')
+parser.add_argument('-s', '--hysteresis', type=hysteresis_type, metavar="[0-10]", help='hysteresis, in percentage of disk size', default=1)
+parser.add_argument('-f', '--fs', type=str, action='append', metavar="fs", help='path to the filesystem', required=True)
+parser.add_argument('-d', '--daemon', action='store_true', help='daemon mode')
+parser.add_argument('-i', '--interval', type=int, help='interval in seconds to work in daemon mode', default=60*60)
 
+args = parser.parse_args()
+
+fss = []
+baloon_filename = args.baloon
+hysteresis_percent = args.hysteresis/100.0
+utilization_percent = args.utilization/100.0
+daemon_mode = args.daemon
+daemon_mode_interval = args.interval
+
+for fs in args.fs:
+    fs = os.path.realpath(fs)
+    if not os.path.isdir(fs):
+        raise ValueError(f'{fs} is not a directory')
+    fss.append(fs)
+
+if not daemon_mode:
+    for p in vars(args):
+        print(f'{p}: {getattr(args, p)}')
+    for fs in fss:
+        set_utilization(fs, utilization_percent, baloon_filename, hysteresis_percent)
+
+else:
+    while True:
+        for fs in fss:
+            if os.path.isdir(fs):
+                try:
+                    set_utilization(fs=fs, utilization_percent=utilization_percent, baloon_filename=baloon_filename, hysteresis_percent=hysteresis_percent, quiet=True)
+                except Exception as e:
+                    pass
+        time.sleep(daemon_mode_interval)