ステートフル サービス専用のハードウェア クラスタを vSphere IaaS control plane に作成する場合は、vSAN Direct データストアを使用できます。vSAN Direct は、ほぼ raw のデータストアであり、これは ESXi ホストのローカルにある未要求のストレージ デバイスにデプロイします。
vSAN Direct のストレージ デバイスへのタグ付け
vSAN Direct では、vSAN クラスタ内の各 ESXi ホストに、未要求ディスクが必要です。ただし、特定の環境では、vSAN はホスト上のすべてのローカル ストレージ デバイスを自動的に要求します。デバイスを通常の vSAN の対象外にしたり、vSAN Direct に使用できるようにしたりできます。
手順
スクリプトを使用した vSAN Direct のストレージ デバイスのタグ付け
次のスクリプトを使用して、ESXi ホストに接続されている HDD デバイスにタグを付けることもできます。スクリプトを実行すると、デバイスは通常の vSAN の対象外になり、vSAN Direct で使用できるようになります。
#!/usr/bin/env python3 # Copyright 2020 VMware, Inc. All rights reserved. # Abstract # # This script helps manage tagging of Direct Attached HDD disks # on ESXi systems for vSAN Direct in preparation for a VCF deployment. # # It is expected to be used with ESX systems of version 7.0.1 or later. # import argparse from enum import Enum import logging import sys import os import paramiko import subprocess import traceback import ast import getpass from six.moves import input from distutils.util import strtobool from argparse import ArgumentParser class ParseState(Enum): OPEN = 0 DEVICE = 1 class RemoteOperationError(Exception): pass class EsxVersion: def __init__(self, major, minor, release): self.major = major self.minor = minor self.release = release def __str__(self): return '{}.{}.{}'.format(self.major, self.minor, self.release) @staticmethod def build(str): tokens = str.split(b'.',3) return EsxVersion(int(tokens[0]), int(tokens[1]), int(tokens[2])) class StorageDevice: def __init__(self, deviceId, isSSD, isVsanDirectEnabled): self.deviceId = str(deviceId.decode()) self.isSSD = isSSD self.isVsanDirectCapable = True self.isVsanDirectEnabled = isVsanDirectEnabled def __str__(self): return '{}:\n\tIs SSD: {}\n\tvsanDirect enabled:{}'.format( self.deviceId, self.isSSD, self.isVsanDirectEnabled) @staticmethod def strToBool(v): return bool(strtobool(str(v.decode()))) @staticmethod def build(deviceId, props): vsanDirectEnabled = False isLocal = StorageDevice.strToBool(props[b'Is Local']) status = props[b'Status'] isOffline = StorageDevice.strToBool(props[b'Is Offline']) isSSD = StorageDevice.strToBool(props[b'Is SSD']) isBootDevice = StorageDevice.strToBool(props[b'Is Boot Device']) deviceType = props[b'Device Type'] if deviceType == b'Direct-Access' and isLocal and (not isOffline) and (not isBootDevice) and status == b'on': return StorageDevice(deviceId, isSSD, vsanDirectEnabled) else: print("Skipping device {}".format(deviceId)) return None def parse_arguments(): """ Parses the command line arguments to the function """ parser = argparse.ArgumentParser() parser.add_argument('--hostname', dest='hostname', help='specify hostname for the ESX Server', required=True) parser.add_argument('--username', dest='username', help='specify username to connect to the ESX Server', required=True) parser.add_argument('--password', dest='password', help='specify password to connect to the ESX Server', required=False) return parser.parse_args() def get_esx_version(sshClient): global logger stdin_, stdout_, stderr_ = sshClient.exec_command('vmware -v') exit_status = stdout_.channel.recv_exit_status() if exit_status != 0: logger.error('Command exited with non-zero status: %s' % exit_status) logger.error('Error message: %s' % stderr_.read()) raise RemoteOperationError('Failed to determine ESX version') output = stdout_.read() tokens = output.split() if len(tokens) < 3: raise RemoteOperationError('Invalid ESX Version - %s', output) return EsxVersion.build(tokens[2]) def check_esx_version(esxVersion): return esxVersion.major >= 7 and esxVersion.minor >= 0 and esxVersion.release >= 1 def query_devices(sshClient): global logger stdin_, stdout_, stderr_ = sshClient.exec_command('esxcli storage core device list') exit_status = stdout_.channel.recv_exit_status() if exit_status != 0: logger.error('Command exited with non-zero status: %s' % exit_status) logger.error('Error message: %s' % stderr_.read()) raise RemoteOperationError('Failed to query core storage device list') output = stdout_.read() # Build the device list from the output return create_device_list(output) def create_device_list(str): devices = [] deviceId="" deviceProps={} parseState = ParseState.OPEN for line in str.splitlines(): if parseState == ParseState.OPEN: if line.strip(): deviceId=line.strip() parseState = ParseState.DEVICE elif parseState == ParseState.DEVICE: if line.strip(): props = line.strip().split(b':',1) deviceProps[props[0]] = props[1].strip() else: if deviceId: device = StorageDevice.build(deviceId, deviceProps) if device: devices.append(device) else: logger.debug("Skipping device {}".format(deviceId)) deviceId="" deviceProps={} parseState = ParseState.OPEN if deviceId: device = StorageDevice.build(deviceId, deviceProps) if device: devices.append(device) return devices def tag_device_for_vsan_direct(sshClient, deviceId): global logger logger.info("Tagging device [{}] for vSAN Direct".format(deviceId)) command = "esxcli vsan storage tag add -d " + deviceId + " -t vsanDirect" stdin_, stdout_, stderr_ = sshClient.exec_command(command) exit_status = stdout_.channel.recv_exit_status() if exit_status != 0: logger.error('Command exited with non-zero status: %s' % exit_status) logger.error('Error message: %s' % stderr_.read()) raise RemoteOperationError('Failed to tag device [{}] for vSAN Direct'.format(deviceId)) logger.info('Successfully tagged device [{}] for vSAN Direct'.format(deviceId)) def untag_device_for_vsan_direct(sshClient, deviceId): global logger logger.info("Untagging device [{}] for vSAN Direct".format(deviceId)) command = "esxcli vsan storage tag remove -d " + deviceId + " -t vsanDirect" stdin_, stdout_, stderr_ = sshClient.exec_command(command) exit_status = stdout_.channel.recv_exit_status() if exit_status != 0: logger.error('Command exited with non-zero status: %s' % exit_status) logger.error('Error message: %s' % stderr_.read()) raise RemoteOperationError('Failed to untag device [{}] for vSAN Direct'.format(deviceId)) logger.info('Successfully untagged device [{}] for vSAN Direct'.format(deviceId)) def get_vsan_info_for_device(sshClient, deviceId): global logger command = "vdq -q -d {}".format(deviceId) stdin_, stdout_, stderr_ = sshClient.exec_command(command) exit_status = stdout_.channel.recv_exit_status() if exit_status != 0: logger.error('Command exited with non-zero status: %s' % exit_status) logger.error('Error message: %s' % stderr_.read()) raise RemoteOperationError('Failed to query vsan direct status on device [%s]' % deviceId) output = stdout_.read() return ast.literal_eval(str(output.decode())) def update_vsan_direct_status(sshClient, devices): for device in devices: vsanInfo = get_vsan_info_for_device(sshClient, device.deviceId) device.isVsanDirectEnabled = vsanInfo[0]['IsVsanDirectDisk'].strip() == "1" device.isVsanDirectCapable = vsanInfo[0]['State'].strip() == 'Eligible for use by VSAN' def getVsanDirectCapableDevices(devices): selectDevices = [] # Cull devices incapable of vSAN Direct for device in devices: if device.isVsanDirectCapable: selectDevices.append(device) return selectDevices def print_devices(devices): print("Direct-Attach Devices:") print("======================") iDevice = 0 for device in devices: iDevice = iDevice + 1 print ("{}. {}".format(iDevice, device)) print("======================") def tag_devices(sshClient, devices): for device in devices: tag_device_for_vsan_direct(sshClient, device.deviceId) def untag_devices(sshClient, devices): for device in devices: untag_device_for_vsan_direct(sshClient, device.deviceId) def tag_all_hdd_devices(sshClient, devices): hddDevices = [] for device in devices: if not device.isSSD: hddDevices.append(device) if len(hddDevices) > 0: tag_devices(sshClient, hddDevices) def show_usage(): print ("===================================") print ("commands: {tag-all-hdd, tag, untag}") print ("\ttag <comma separated serial numbers of devices>") print ("\tuntag <comma separated serial numbers of devices>") print ("\ttag-all-hdd") print ("=============") def main(): global logger logger.info('Tag disks for vSAN Direct') try: # Parse arguments args = parse_arguments() # 1. Setup SSH connection to ESX system sshClient = paramiko.SSHClient() sshClient.load_system_host_keys() sshClient.set_missing_host_key_policy(paramiko.AutoAddPolicy()) passwd = args.password if passwd == None: passwd = getpass.getpass(prompt='Password: ') logger.info('Connecting to ESX System (IP: %s)' % args.hostname) sshClient.connect(args.hostname, username=args.username, password=passwd) # version check esxVersion = get_esx_version(sshClient) print('ESX Version on {} is {}'.format(args.hostname, esxVersion)) logger.info('Checking ESX Version...') if not check_esx_version(esxVersion): raise Exception('ESX Version must be 7.0.1 or greater') print ('This script helps tag direct-attached disks for vSAN Direct on ESX') print ('Note: Only disks of type HDD are supported at this time.') print () print ("For help, type help") show_usage() while True: # get device list print("Querying devices...") devices = query_devices(sshClient) # update devices with vSAN Direct status update_vsan_direct_status(sshClient, devices) # cull device list selectDevices = getVsanDirectCapableDevices(devices) # List the devices for the user to see print_devices(selectDevices) # find out what the user wants to do to these devices args = input('Command> ').split() if len(args) == 0: break cmd = args[0] if cmd == 'q' or cmd == 'quit' or cmd == 'exit': break elif cmd == 'help': show_usage() elif cmd == 'tag-all-hdd': print("Tagging all HDD devices...") tag_all_hdd_devices(sshClient, selectDevices) elif cmd == 'tag' or cmd == 'untag': chosenDevices = [] if len(args) > 1: serials = args[1].split(',') for serialStr in serials: serial = int(serialStr) if serial < 1 or serial > len(selectDevices): raise Exception("Error: Serial {} is out of range".format(serial)) chosenDevices.append(selectDevices[serial-1]) if len(chosenDevices) == 0: print("No devices specified") continue if cmd == 'tag': print("Tagging devices...") tag_devices(sshClient, chosenDevices) else: print("Untagging devices...") untag_devices(sshClient, chosenDevices) else: print ("Error: Unrecognized command - %s" % cmd) except paramiko.ssh_exception.AuthenticationException as e: logger.error(e) sys.exit(5) except Exception as e: logger.error('Disk tagging failed with error: %s' % e) logger.error(traceback.format_exc()) sys.exit(1) finally: # Close SSH client try: sshClient.close() except: pass # Set up logging logging.basicConfig() logger = logging.getLogger('tag-disks-for-vsan-direct') if __name__ == "__main__": main()
vSAN Direct データストアの作成
vSphere 管理者は、vSAN データ パーシステンス プラットフォームや仮想マシン インスタンス ストレージなどの機能で使用する vSAN Direct データストアを設定します。データストアを作成するには、ESXi ホストに対してローカルな未要求のストレージ デバイスを使用します。