如果要为 vSphere IaaS control plane 中的有状态服务创建专用硬件集群，则可以使用 vSAN Direct 数据存储。vSAN Direct 是一个以原始数据为主的数据存储，部署在 ESXi 主机本地无人认领的存储设备上。
标记用于 vSAN Direct 的存储设备
vSAN Direct 需要 vSAN 集群中的每个 ESXi 主机上有一些无人认领磁盘。但是，在某些环境中，vSAN 会自动认领主机上的所有本地存储设备。可以将设备设置为不符合常规 vSAN 的要求，而设置为可用于 vSAN Direct。
过程
使用脚本标记用于 vSAN Direct 的存储设备
或者，也可以使用以下脚本标记连接到 ESXi 主机的 HDD 设备。运行脚本后，设备将不符合常规 vSAN 的要求，且可用于 vSAN Direct。
#!/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()
创建 vSAN Direct 数据存储
作为 vSphere 管理员，可以设置要用于 vSAN 数据持久性 平台或虚拟机实例存储等功能的 vSAN Direct 数据存储。要创建数据存储，请使用 ESXi 主机本地的空闲存储设备。
过程
- 选择要声明的设备，然后在针对 vSAN Direct 声明列选中一个复选框。
注： 如果为常规 vSAN 数据存储声明设备，则这些设备不会显示在 vSAN Direct 选项卡中。
- 单击数据存储选项卡以显示集群中的所有 vSAN Direct 数据存储。
