# -*- coding:utf-8 -*- ############################################################################# # Copyright (c) 2020 Huawei Technologies Co.,Ltd. # # openGauss is licensed under Mulan PSL v2. # You can use this software according to the terms # and conditions of the Mulan PSL v2. # You may obtain a copy of Mulan PSL v2 at: # # http://license.coscl.org.cn/MulanPSL2 # # THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, # WITHOUT WARRANTIES OF ANY KIND, # EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, # MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE. # See the Mulan PSL v2 for more details. # ---------------------------------------------------------------------------- # Description : disk.py is a utility to do something for disk. ############################################################################# import os import subprocess import sys import psutil import math sys.path.append(sys.path[0] + "/../../") from gspylib.common.ErrorCode import ErrorCode from gspylib.os.gsplatform import g_Platform """ Requirements: 1. getUsageSize(directory) -> get directory or file real size. Unit is byte. 2. getMountPathByDataDir(directory) -> get the input directory of the mount disk 3. getMountPathAvailSize(directory) -> get the avail size about the input directory of the mount disk. Unit MB 4. getDiskSpaceUsage(directory) -> get directory or file space size. Unit is byte. 5. getDiskInodeUsage(directory) -> get directory or file inode uage. Unit is byte. 6. getDiskMountType(directory) -> get the type about the input directory of the mount disk. 7. getDiskReadWritespeed(inputFile, outputFile, bs, count, iflag = '', oflag = '') -> get disk read/write speed """ class diskInfo(): """ function: Init the DiskUsage options """ def __init__(self): self.mtabFile = g_Platform.getMtablFile() def getMountInfo(self, allInfo=False): """ get mount disk information: device mountpoint fstype opts input: bool (physical devices and all others) output: list """ return psutil.disk_partitions(allInfo) def getUsageSize(self, directory): """ get directory or file real size. Unit is byte """ cmd = "" try: cmd = "%s -l -R %s | %s ^- | %s '{t+=$5;} END {print t}'" % ( g_Platform.getListCmd(), directory, g_Platform.getGrepCmd(), g_Platform.getAwkCmd()) (status, output) = subprocess.getstatusoutput(cmd) if (status == 0): return output.split('\t')[0].strip() else: raise Exception(ErrorCode.GAUSS_514["GAUSS_51400"] % cmd + " Error: \n%s" % str(output)) except Exception as e: raise Exception(ErrorCode.GAUSS_514["GAUSS_51400"] % cmd) # Mtab always keeps the partition information already mounted in the # current system. # For programs like fdisk and df, # you must read the mtab file to get the partition mounting status in # the current system. def getMountPathByDataDir(self, datadir): """ function : Get the disk by the file path input : datadir the file path output : device disk """ device = "" mountDisk = {} if not os.path.exists(datadir): raise Exception(ErrorCode.GAUSS_502["GAUSS_50228"] % datadir) try: datadir = os.path.realpath(datadir) with open(self.mtabFile, "r") as fp: for line in fp.readlines(): if line.startswith('none'): continue i_fields = line.split() if len(i_fields) < 3: continue i_device = i_fields[0].strip() i_mountpoint = i_fields[1].strip() mountDisk[i_mountpoint] = [i_device, i_mountpoint] mountList = mountDisk.keys() sorted(mountList, reverse=True) for mount in mountList: i_mountpoint = mountDisk[mount][1] if (i_mountpoint == '/'): i_mount_dirlst = [''] else: i_mount_dirlst = i_mountpoint.split('/') data_dirlst = datadir.split('/') if len(i_mount_dirlst) > len(data_dirlst): continue if (i_mount_dirlst == data_dirlst[:len(i_mount_dirlst)]): device = mountDisk[mount][0] break except Exception as e: raise Exception(ErrorCode.GAUSS_530["GAUSS_53011"] + " disk mount." + "Error: %s" % str(e)) return device # Mtab always keeps the partition information already mounted in the # current system. # For programs like fdisk and df, # you must read the mtab file to get the partition mounting status in # the current system. def getMountPathAvailSize(self, device, sizeUnit='MB'): """ function : Get the disk size by the file path input : device the file path : sizeUnit byte, GB, MB, KB output : total disk size """ if (not os.path.exists(device)): raise Exception(ErrorCode.GAUSS_502["GAUSS_50228"] % device) try: dev_info = os.statvfs(device) if (sizeUnit == 'GB'): total = dev_info.f_bavail * dev_info.f_frsize // ( 1024 * 1024 * 1024) elif (sizeUnit == 'MB'): total = dev_info.f_bavail * dev_info.f_frsize // (1024 * 1024) elif (sizeUnit == 'KB'): total = dev_info.f_bavail * dev_info.f_frsize // 1024 else: total = dev_info.f_bavail * dev_info.f_frsize except Exception as e: raise Exception(ErrorCode.GAUSS_530["GAUSS_53011"] + " disk size." + "Error: %s" % str(e)) return total # Mtab always keeps the partition information already mounted in the # current system. # For programs like fdisk and df, # you must read the mtab file to get the partition mounting status in # the current system. def getDiskSpaceUsage(self, path): """ function : Get the disk usage by the file path method of calculation: Total capacity (KB)=f_bsize*f_blocks/1024 [1k-blocks] Usage (KB)= f_bsize*(f_blocks-f_bfree)/1024 [Used] Valid capacity (KB) = f_bsize*f_bavail/1024 [Available] Usage (%) = Usage/(Usage + Valid capacity) *100 [Use%] input : path the file path output : percent """ percent = 0 if (not os.path.exists(path)): raise Exception(ErrorCode.GAUSS_502["GAUSS_50228"] % path) try: dev_info = os.statvfs(path) used = dev_info.f_blocks - dev_info.f_bfree valueable = dev_info.f_bavail + used percent = math.ceil((float(used) / valueable) * 100) except Exception as e: raise Exception(ErrorCode.GAUSS_530["GAUSS_53011"] + " disk space." + "Error: %s" % str(e)) return float(percent) def getDiskSpaceForShrink(self, path, delta): """ function : Get the disk usage by the file path for Shrink input : path the file path and deltasize output : percent """ percent = 0 if (not os.path.exists(path)): raise Exception(ErrorCode.GAUSS_502["GAUSS_50228"] % path) try: dev_info = os.statvfs(path) used = (dev_info.f_blocks - dev_info.f_bfree) * dev_info.f_bsize valueable = dev_info.f_bavail * dev_info.f_bsize + used + delta percent = math.ceil((float(used) // valueable) * 100) except Exception as e: raise Exception(ErrorCode.GAUSS_530["GAUSS_53011"] + " disk space." + "Error: %s" % str(e)) return float(percent) def getDiskInodeUsage(self, Path): """ function : Get the inode by the file path input : Path the file path output : percent """ percent = 0 if (not os.path.exists(Path)): raise Exception(ErrorCode.GAUSS_502["GAUSS_50228"] % Path) try: dev_info = os.statvfs(Path) used = dev_info.f_files - dev_info.f_ffree valueable = dev_info.f_favail + used percent = math.ceil((float(used) // valueable) * 100) except Exception as e: raise Exception(ErrorCode.GAUSS_530["GAUSS_53011"] + " disk Inode." + "Error: %s" % str(e)) return float(percent) def getDiskMountType(self, device): """ function : Get the mount type by device input : device eg:/dev/pts output : fstype device type """ fstype = "" try: with open(self.mtabFile, "r") as fp: for line in fp.readlines(): if line.startswith('#'): continue i_fields = line.split() if len(i_fields) < 3: continue i_device = i_fields[0].strip() i_fstype = i_fields[2].strip() if i_device == device: fstype = i_fstype break except Exception as e: raise Exception(ErrorCode.GAUSS_530["GAUSS_53011"] + " disk mount type." + "Error: %s" % str(e)) return fstype def getDiskReadWritespeed(self, inputFile, outputFile, bs, count, iflag='', oflag=''): """ function : Get the disk read or write rate input : inputFile : outputFile : bs : count : iflag : oflag output : speed """ try: cmd = "%s if=%s of=%s bs=%s count=%s " % ( g_Platform.getDdCmd(), inputFile, outputFile, bs, count) if iflag: cmd += "iflag=%s " % iflag if oflag: cmd += "oflag=%s " % oflag (status, output) = subprocess.getstatusoutput(cmd) if (status == 0): output = output.split("\n") resultInfolist = output[2].strip().split(",") if ((resultInfolist[2]).split()[1] == "KB/s"): speed = float((resultInfolist[2]).split()[0]) * 1024 elif ((resultInfolist[2]).split()[1] == "MB/s"): speed = float((resultInfolist[2]).split()[0]) * 1024 * 1024 elif ((resultInfolist[2]).split()[1] == "GB/s"): speed = float( (resultInfolist[2]).split()[0]) * 1024 * 1024 * 1024 elif ((resultInfolist[2]).split()[1] == "TB/s"): speed = float((resultInfolist[2]).split()[ 0]) * 1024 * 1024 * 1024 * 1024 else: speed = float((resultInfolist[2]).split()[0]) return speed else: raise Exception(ErrorCode.GAUSS_514["GAUSS_51400"] % cmd + " Error: \n%s" % str(output)) except Exception as e: raise Exception( ErrorCode.GAUSS_504["GAUSS_50406"] + "Error:\n%s" % str(e)) g_disk = diskInfo()