[DRBD-user] Create a third diskless node on an active 2-node cluster
Rene Peinthor
rene.peinthor at linbit.com
Wed Mar 3 13:08:28 CET 2021
DRBD_KERNEL_VERSION_CODE=0x08040b
Says you have the old DRBD8 kernel module loaded, Linstor only supports
DRBD9 >=
Btw. you don't need to create a diskless storage pool (until you want
special properties on that pool), Linstor already has DfltDisklessStorPool.
Also diskless-on-remaing is not really needed, as you will get a tiebreaker
diskless resource anyway on a 3 node cluster, with auto-quorum enabled.
Cheers,
Rene
On Wed, Mar 3, 2021 at 12:48 PM Gábor Hernádi <gabor.hernadi at linbit.com>
wrote:
> Hello,
>
> when you executed `linstor node create C ...` Linstor should have given
> you a list of supported layers + providers or reasons why layers /
> providers are not supported. You can recheck that list with
> linstor node info
> That command should tell you why Linstor thinks that C does not support
> DRBD.
>
> Best regards,
> Gabor
>
> On Wed, Mar 3, 2021 at 12:29 PM Ferran Alchimia <ferran.alchimia at gmail.com>
> wrote:
>
>> Hi,
>>
>> I currently have a 2 node (combined) cluster and I want to add an HA
>> linstor-controller. I was following this guide
>> https://www.linbit.com/drbd-user-guide/linstor-guide-1_0-en/#s-linstor_ha
>>
>> The first step asks for an AutoQuorum capable resource. So I think I have
>> to add a third node to my cluster. This is my starting position:
>>
>> ╭─────────────────────────────────────────────────────╮
>> ┊ Node ┊ NodeType ┊ Addresses ┊ State ┊
>> ╞═════════════════════════════════════════════════════╡
>> ┊ H ┊ COMBINED ┊ 10.0.7.106:3366 (PLAIN) ┊ Online ┊
>> ┊ T ┊ COMBINED ┊ 10.0.7.105:3366 (PLAIN) ┊ Online ┊
>> ╰─────────────────────────────────────────────────────╯
>>
>> ╭──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮
>> ┊ StoragePool ┊ Node ┊ Driver ┊ PoolName ┊
>> FreeCapacity ┊ TotalCapacity ┊ CanSnapshots ┊ State ┊
>>
>> ╞══════════════════════════════════════════════════════════════════════════════════════════════════════════════════════╡
>> ┊ DfltDisklessStorPool ┊ H ┊ DISKLESS ┊ ┊
>> ┊ ┊ False ┊ Ok ┊
>> ┊ DfltDisklessStorPool ┊ T ┊ DISKLESS ┊ ┊
>> ┊ ┊ False ┊ Ok ┊
>> ┊ drbdpool ┊ H ┊ LVM_THIN ┊ vgthc1/drbdpool ┊
>> 3.13 TiB ┊ 3.49 TiB ┊ True ┊ Ok ┊
>> ┊ drbdpool ┊ T ┊ LVM_THIN ┊ vgthc1/drbdpool ┊
>> 3.13 TiB ┊ 3.49 TiB ┊ True ┊ Ok ┊
>>
>> ╰──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯
>>
>> Since my third node won't have any storage devices dedicated to drbd I
>> presumed that I could add a DISKLESS node (I don't know if this is true),
>> just for quorum and not for replica.
>>
>> linstor n create --node-type satellite C 10.100.1.3
>>
>> linstor n l
>> ╭───────────────────────────────────────────────────────────╮
>> ┊ Node ┊ NodeType ┊ Addresses ┊ State ┊
>> ╞═══════════════════════════════════════════════════════════╡
>> ┊ C ┊ SATELLITE ┊ 10.100.1.3:3366 (PLAIN) ┊ Online ┊
>> ┊ H ┊ COMBINED ┊ 10.0.7.106:3366 (PLAIN) ┊ Online ┊
>> ┊ T ┊ COMBINED ┊ 10.0.7.105:3366 (PLAIN) ┊ Online ┊
>> ╰───────────────────────────────────────────────────────────╯
>> linstor sp create diskless C drbdpool
>>
>>
>> ╭──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮
>> ┊ StoragePool ┊ Node ┊ Driver ┊ PoolName ┊
>> FreeCapacity ┊ TotalCapacity ┊ CanSnapshots ┊ State ┊
>>
>> ╞══════════════════════════════════════════════════════════════════════════════════════════════════════════════════════╡
>> ┊ DfltDisklessStorPool ┊ C ┊ DISKLESS ┊ ┊
>> ┊ ┊ False ┊ Ok ┊
>> ┊ DfltDisklessStorPool ┊ H ┊ DISKLESS ┊ ┊
>> ┊ ┊ False ┊ Ok ┊
>> ┊ DfltDisklessStorPool ┊ T ┊ DISKLESS ┊ ┊
>> ┊ ┊ False ┊ Ok ┊
>> ┊ drbdpool ┊ C ┊ DISKLESS ┊ ┊
>> ┊ ┊ False ┊ Ok ┊
>> ┊ drbdpool ┊ H ┊ LVM_THIN ┊ vgthc1/drbdpool ┊
>> 3.13 TiB ┊ 3.49 TiB ┊ True ┊ Ok ┊
>> ┊ drbdpool ┊ T ┊ LVM_THIN ┊ vgthc1/drbdpool ┊
>> 3.13 TiB ┊ 3.49 TiB ┊ True ┊ Ok ┊
>>
>> ╰──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯
>>
>> I add the --diskless-on-remaining flag for the rg definition (I don't
>> know if this is needed)
>> linstor rg m drbdpoolvm --place-count 2 --diskless-on-remaining
>>
>> linstor rg l
>> ╭──────────────────────────────────────────────────────────────────╮
>> ┊ ResourceGroup ┊ SelectFilter ┊ VlmNrs ┊ Description ┊
>> ╞══════════════════════════════════════════════════════════════════╡
>> ┊ DfltRscGrp ┊ PlaceCount: 2 ┊ ┊ ┊
>> ╞┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄╡
>> ┊ drbdpoolvm ┊ PlaceCount: 2 ┊ 0 ┊ ┊
>> ┊ ┊ StoragePool(s): drbdpool ┊ ┊ ┊
>> ┊ ┊ DisklessOnRemaining: True ┊ ┊ ┊
>> ╰──────────────────────────────────────────────────────────────────╯
>>
>> And then I try to create a test resource
>> linstor resource create T test
>> SUCCESS:(...)
>>
>> linstor resource create H test
>> WARNING: Could not find suitable node to automatically create a tie
>> breaking resource for 'test'.
>> SUCCESS:(...)
>>
>> linstor resource create C test
>> ERROR:Description: Satellite 'C' does not support the following
>> layers: [DRBD]Details: Node(s): 'C', Resource: 'test'Show reports:
>> linstor error-reports show 603F507D-00000-000005
>>
>> As you can see the resource creation fails on C node. I have installed
>> drbd on that node just in case, here goes the output:
>> drbdadm --version
>> DRBDADM_BUILDTAG=GIT-hash:\ a7820b3c14497a34f955ba5ce56cf1bc9d2d353e\
>> build\ by\ @buildsystem\,\ 2021-02-09\ 09:27:27
>> DRBDADM_API_VERSION=1
>> DRBD_KERNEL_VERSION_CODE=0x08040b
>> DRBDADM_VERSION_CODE=0x091000
>> DRBDADM_VERSION=9.16.0
>>
>> Overall my C node does not have any "storage" for the drbd cluster, I
>> just want it to be a diskless node in order to achieve HA for the
>> resources. It seems I have misunderstood something but I just don't know
>> where to look for more info. Any hints/help would be appreciated.
>>
>> Regards,
>> Ferran
>> _______________________________________________
>> Star us on GITHUB: https://github.com/LINBIT
>> drbd-user mailing list
>> drbd-user at lists.linbit.com
>> https://lists.linbit.com/mailman/listinfo/drbd-user
>>
>
>
> --
> Best regards,
> Gabor Hernadi
> _______________________________________________
> Star us on GITHUB: https://github.com/LINBIT
> drbd-user mailing list
> drbd-user at lists.linbit.com
> https://lists.linbit.com/mailman/listinfo/drbd-user
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20210303/4151abde/attachment-0001.htm>
More information about the drbd-user
mailing list