最後更新: 2020-12-30
目錄
- mount/un-mount
- iscsi shared storage
Activate/Disable the Software iSCSI Adapter
Activate the Software iSCSI Adapter
vSphere Client -> Configuration tab -> Storage Adapters ->
Add -> select Software iSCSI Adapter -> Properties -> Configure -> select "Enabled"
Disable the Software iSCSI Adapter
vSphere Client -> Configuration -> Storage Adapters ->
Select "software iSCSI adapter" -> Properties -> Configure -> deselect "Enabled"
Config Software iSCSI Adapter
1. Add Software iSCSI Adapter
Configuration -> Storage adapters -> Add -> Click "Add Software 'iSCSI' Adapter"
2. Set local adapter name
Click "created adapter" -> Properties
Click "Configure" and set the Name to the IQN for the esxi
3. Assign NIC
"Network Configuration" Tab -> select NIC
4. Add LUN
Click the "Dynamic Discovery Tab" then click the "Add"
CHAP -> Use CHAP -> input Name & Secret
Right-click "created adapter" -> Rescan
The device turns gray and is 'unmounted' -> Right-click the device name and select attach
5. Add Storage
"Storage" Tab -> Add Storage... -> Disk/LUN -> 在 Storage Adapters 見到的 Devices
Enable Jumbo Frames for iSCSI
Configuration -> Networking -> Select switch(use for iSCSI traffic) Properties -> Ports tab -> select vSwitch -> Edit -> MTU
Un-mount
Unmount
just going to detach the device from that host and you do not loose any data
CLI
esxcli storage filesystem unmount -l LUN01
esxcli storage filesystem unmount -u 4e414917-a8d75514-6bae-0019b9f1ecf4
esxcli storage filesystem unmount -p /vmfs/volumes/4e414917-a8d75514-6bae-0019b9f1ecf4
Detach
You might need to detach the device to make it inaccessible to your host,
when, for example, you perform a hardware upgrade on the storage side.
Delete
This option will delete the data from your datastore.
The datastore delete operation permanently deletes all files associated with virtual machines on the datastore.
Although you can delete the datastore without unmounting, it is preferable that you unmount the datastore first.
Unmount 前要 ...
If the LUN is being used as a VMFS datastore, all objects, (such as virtual machines, snapshots, and templates)
stored on the VMFS datastore are unregistered or moved to another datastore.
All CD/DVD images located on the VMFS datastore must also be unregistered from the virtual machines.
補充
From the vSphere Client, this information is visible in the Properties window of the datastore.
CLI
esxcli storage vmfs extent list
Volume Name VMFS UUID Extent Number Device Name Partition ----------- ----------------------------------- ------------- ------------------------------------ --------- RAID6 57b8930b-a409c0a6-c88b-d4ae5275577e 0 naa.6782bcb0138478001f540cc410d12907 3 6000G_R1 59f931f8-c85576f2-939c-782bcb780071 0 naa.600140519d4ed05191948a1b9d6a2f04 1
use the vsphere client to:
1)perform the unmount for each host (or can be done for all hosts at once from the datastores and clusters view), then
2)perform the "detach" operation for each host individually from the vsphere client (step 3 below)
3)unpresent the LUN using vendor-specific storage tools/consoles
4)rescan from all hosts using the vsphere client
When the device is detached, it stays in an unmounted state even if the device is represented (that is, the detached state is persistent).
To bring the device back online, the device must be attached.
After you unmount a VMFS datastore, the datastore becomes inactive and is dimmed in the host's datastore list.
An unmounted NFS datastore no longer appears on the list.
When the device is detached, it stays in an unmounted state even if the device is re-presented (that is, the detached state is persistent).
To bring the device back online, the device must be attached.
permanently decommission from an ESXi host
=> manually remove the NAA entries from the host configuration:
# To list the permanently detached devices, run this command:
esxcli storage core device detached list
Device UID State ------------------------------------ ----- naa.50060160c46036df50060160c46036df off naa.6006016094602800c8e3e1c5d3c8e011 off
# To permanently remove the device configuration information from the system, run this command:
esxcli storage core device detached remove -d NAA_ID
Remove dead lun
# 當 Guest 沒有 mount 它上面的檔案( iso) 或沒東西要寫入(sync)時, 就可以用以下 cmd remove 佢
esxcfg-rescan -d vmhba35;
Disconnect the connection
# List session
esxcli iscsi session list
vmhba35,iqn.2003-01.org.linux-iscsi.backup2.x8664:sn.ee167d963b96,00023d000001 Adapter: vmhba35 Target: iqn.2003-01.org.linux-iscsi.backup2.x8664:sn.ee167d963b96 ISID: 00023d000001 TargetPortalGroupTag: 1 AuthenticationMethod: none DataPduInOrder: true DataSequenceInOrder: true DefaultTime2Retain: 0 DefaultTime2Wait: 2 ErrorRecoveryLevel: 0 FirstBurstLength: 65536 ImmediateData: true InitialR2T: true MaxBurstLength: 262144 MaxConnections: 1 MaxOutstandingR2T: 1 TSIH: 9180
# Disconnect the session
# The iSCSI adapter name, for example, vmhba34. This option is required.
-A|--adapter=str
# The iSCSI target name, for example, iqn.X.
-n|--name=str
esxcli iscsi session remove -A vmhba35 -n iqn.2003-01.org.linux-iscsi.backup2.x8664:sn.ee167d963b96
Mount iscsi by cli
ESXi 6, 7 don't support iSCSI CRC chechsums, so "Data Digest" and "Header Digest"
It does support them as advanced options.
* Depending on the type of your adapters, certain parameters might not be available.
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# 查看有無 Enable software iscsi
esxcli iscsi software get
true
# 如上上一 result 不是 true, 就要 Enable software iSCSI
esxcli iscsi software set -e true
# If no adapter exists, add one.
# -n <nic_iSCSI_target(iqn.xxx:xxx)(UID)> -A <vmhba>
esxcli iscsi networkportal add -n iqn.esxi -A vmhba64
# Info.
esxcli iscsi adapter list
Adapter Driver State UID Description ------- --------- ------ ------------------------------------ ----------- vmhba64 iscsi_vmk online iqn.1998-01.com.vmware:vms0-199aec7a iSCSI Software Adapter
# Software adapter Info
esxcli iscsi adapter get -A vmhba64 vmhba64 Name: iqn.1998-01.com.vmware:vms0-199aec7a Alias: iqn.office-esxi Vendor: VMware Model: iSCSI Software Adapter ...
esxcli iscsi adapter capabilities get -A vmhba64
vmhba64 ISnS Settable: false SLP Settable: false Static Discovery Settable: false Sendtarget Discovery Settable: false ....
# Add a dynamic discovery address
esxcli iscsi adapter discovery sendtarget add -A vmhba64 -a 192.168.88.31
esxcli iscsi adapter discovery sendtarget param get -A vmhba64 -a 192.168.88.31
Name Current Default Min Max Settable Inherit -------------------- ---------- ---------- --- -------- -------- ------- ErrorRecoveryLevel 0 0 0 2 false true InitialLoginRetryMax 4 4 0 64 false true ...
esxcli iscsi adapter target portal list
Adapter Target IP Port Tpgt ------- -------------------------- ------------- ---- ---- vmhba64 iqn.synology:MyNAS.esxi-tg 192.168.88.31 3260 1 vmhba64 iqn.synology:MyNAS.esxi-tg 192.168.99.31 3260 1 ....
# 設定 Login
# -D|--default Resetting iSCSI authentication setting to default.
# -d|--direction=<str> The iSCSI authentication direction. Options are: [uni, mutual]
# -l|--level=<str> The iSCSI authentication level. Options are: [prohibited, discouraged, preferred, required]
# -N|--authname=<str>
# -S|--secret=<str>
esxcli iscsi adapter target portal auth chap set \
-N ? -S ? \
-A vmhba64 -a 192.168.88.31 -n iqn.synology:MyNAS.esxi-tg \
--direction=uni --level=required
# checking
esxcli iscsi adapter auth chap get -A vmhba64
Direction: uni Name: Level: prohibited
# After setup is complete, perform rediscovery and rescan all storage devices.
esxcli iscsi adapter discovery rediscover -A vmhba64
Rediscovery started
esxcli storage core adapter rescan --adapter=vmhba64
# logout & login
esxcli iscsi session list
esxcli iscsi session remove -A vmhba64
esxcli iscsi session add -A vmhba64
# 連線成功後. 可以見到有什麼 LUN
esxcli iscsi adapter target lun list
Adapter LUN Identifier Channel Number Target Number LUN Number LUN Size in MB ------- ------------------------------------ -------------- ------------- ---------- -------------- vmhba64 naa.6001405121f0963dba19d4751da98ad6 0 0 1 409600
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esxcli storage filesystem [list|mount|unmount|rescan]
# -u|--volume-uuid=<str>
# -l|--volume-label=<str>
# -n|--no-persist
esxcli storage filesystem mount -u 5f5f2c2f-31fb59ce-ad12-a0369f8c3aec
esxcli storage filesystem list
esxcli storage core adapter rescan --all
Remout iSCSI Datastorage
Symptoms:
After cloning snapshot on SAN storage can’t mount the snapshot volume as a datastore to register the VM.
Version: ESXi 6.5, 6.7, 7.0
解決:
要完全 disconnect 先.
unmount datastorage
disconnect iscsi
iscsi shared storage
VMFS is a clustered file system => multiple hosts access the same VMFS datastore concurrently
* multiple hosts do not access the same virtual machine at the same time
=> VMFS provides on-disk locking
VMFS Locking Mechanisms
- ATS-Only Mechanism
- ATS+SCSI Mechanism
ATS = atomic test and set locking
它是 hardware assisted locking
The ATS algorithm supports discrete locking per disk sector.
ATS+SCSI Mechanism
會嘗試用 ATS 先, 當失敗時會轉用 SCSI reservations
the SCSI reservations lock an entire storage device => performance degradation