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    XOSTOR hyperconvergence preview

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    • J
      Jonathon
      last edited by Jonathon

      So, did more testing. Looks like thin_send_recv is not the problem, but maybe socat.
      I am able to manually migrate resource between XOSTOR (linstor) cluster using thin_send_recv. I have encluded all steps below so that it can be replicated.

      And we know socat is used, cause it complains if it is not there.

      jonathon@jonathon-framework:~$ linstor --controller 10.2.0.19 backup ship newCluster pvc-086a5817-d813-41fe-86d8-3fac2ae2028f pvc-086a5817-d813-41fe-86d8-3fac2ae2028f
INFO:
    Cannot use node 'ovbh-pprod-xen10' as it does not support the tool(s): SOCAT
INFO:
    Cannot use node 'ovbh-pprod-xen12' as it does not support the tool(s): SOCAT
INFO:
    Cannot use node 'ovbh-pprod-xen13' as it does not support the tool(s): SOCAT
ERROR:
    Backup shipping of resource 'pvc-086a5817-d813-41fe-86d8-3fac2ae2028f' cannot be started since there is no node available that supports backup shipping.

      Using 1.0.1 thin_send_recv.

      [16:16 ovbh-pprod-xen11 ~]# thin_send --version
1.0.1
[16:16 ovbh-pprod-xen01 ~]# thin_recv --version
1.0.1

      Versions of socat match.

      [16:16 ovbh-pprod-xen11 ~]# socat -V
socat by Gerhard Rieger and contributors - see www.dest-unreach.org
socat version 1.7.3.2 on Aug  4 2017 04:57:10
   running on Linux version #1 SMP Tue Jan 23 14:12:55 CET 2024, release 4.19.0+1, machine x86_64
features:
  #define WITH_STDIO 1
  #define WITH_FDNUM 1
  #define WITH_FILE 1
  #define WITH_CREAT 1
  #define WITH_GOPEN 1
  #define WITH_TERMIOS 1
  #define WITH_PIPE 1
  #define WITH_UNIX 1
  #define WITH_ABSTRACT_UNIXSOCKET 1
  #define WITH_IP4 1
  #define WITH_IP6 1
  #define WITH_RAWIP 1
  #define WITH_GENERICSOCKET 1
  #define WITH_INTERFACE 1
  #define WITH_TCP 1
  #define WITH_UDP 1
  #define WITH_SCTP 1
  #define WITH_LISTEN 1
  #define WITH_SOCKS4 1
  #define WITH_SOCKS4A 1
  #define WITH_PROXY 1
  #define WITH_SYSTEM 1
  #define WITH_EXEC 1
  #define WITH_READLINE 1
  #define WITH_TUN 1
  #define WITH_PTY 1
  #define WITH_OPENSSL 1
  #undef WITH_FIPS
  #define WITH_LIBWRAP 1
  #define WITH_SYCLS 1
  #define WITH_FILAN 1
  #define WITH_RETRY 1
  #define WITH_MSGLEVEL 0 /*debug*/
...
[16:17 ovbh-pprod-xen01 ~]# socat -V
socat by Gerhard Rieger and contributors - see www.dest-unreach.org
socat version 1.7.3.2 on Aug  4 2017 04:57:10
   running on Linux version #1 SMP Tue Jan 23 14:12:55 CET 2024, release 4.19.0+1, machine x86_64
features:
  #define WITH_STDIO 1
  #define WITH_FDNUM 1
  #define WITH_FILE 1
  #define WITH_CREAT 1
  #define WITH_GOPEN 1
  #define WITH_TERMIOS 1
  #define WITH_PIPE 1
  #define WITH_UNIX 1
  #define WITH_ABSTRACT_UNIXSOCKET 1
  #define WITH_IP4 1
  #define WITH_IP6 1
  #define WITH_RAWIP 1
  #define WITH_GENERICSOCKET 1
  #define WITH_INTERFACE 1
  #define WITH_TCP 1
  #define WITH_UDP 1
  #define WITH_SCTP 1
  #define WITH_LISTEN 1
  #define WITH_SOCKS4 1
  #define WITH_SOCKS4A 1
  #define WITH_PROXY 1
  #define WITH_SYSTEM 1
  #define WITH_EXEC 1
  #define WITH_READLINE 1
  #define WITH_TUN 1
  #define WITH_PTY 1
  #define WITH_OPENSSL 1
  #undef WITH_FIPS
  #define WITH_LIBWRAP 1
  #define WITH_SYCLS 1
  #define WITH_FILAN 1
  #define WITH_RETRY 1
  #define WITH_MSGLEVEL 0 /*debug*/

      Migrating using only thin_send_recv works.

      1 Reply Last reply Reply Quote 0
      • J
        Jonathon
        last edited by

        The reason that it may be socat, is because the commands fail when I try using it, as instructed by https://github.com/LINBIT/thin-send-recv

        [13:03 ovbh-pprod-xen11 ~]# thin_send linstor_group/pvc-12aca72c-d94a-4c09-8102-0a6646906f8d_00000_s_test 2>/dev/null | zstd | socat STDIN TCP:10.2.0.10:4321
2024/10/28 13:04:59 socat[25701] E write(5, 0x55da36101da0, 8192): Broken pipe
...
[13:03 ovbh-pprod-xen01 ~]# socat TCP-LISTEN:4321 STDOUT | zstd -d | thin_recv linstor_group/pvc-12aca72c-d94a-4c09-8102-0a6646906f8d_00000 2>/dev/null
2024/10/28 13:04:59 socat[27039] E read(1, 0x560ef6ff4350, 8192): Bad file descriptor

        And the same thing happens if I exclude zstd from both commands.

        1 Reply Last reply Reply Quote 0
        • splastunovS
          splastunov
          last edited by

          Hi!

          I'm looking for new storage cluster for XCP-ng, because ceph RBD performance is very poor.
          The main quetion now - is it possible to build XOSTOR (linstore) cluster separatly from xcp-ng and connect it over ethernet?
          No inforamtion about such scenario in this article.
          So I would like to have "compute" claster of xcp-ng nodes with fast local NVMe disks + and dedicated storage cluster with big amount of HDDs connected vie ethernet.

          And second question is about scaling.
          How this storage cluster could be scaled? Is it possible to add storage nodes online without interrupting clients (VMs)?

          Thank you

          1 Reply Last reply Reply Quote 0
          • olivierlambertO
            olivierlambert Vates 🪐 Co-Founder CEO
            last edited by

            LINSTOR can be reach in NFS or iSCSI if I remember correctly. You question is more for LINSTOR than for XCP-ng 🙂

            splastunovS 1 Reply Last reply Reply Quote 0
            • splastunovS
              splastunov @olivierlambert
              last edited by splastunov

              @olivierlambert NFS and iSCSI have single point of failure. Yes, it is possible to deploy multipath iSCSI, but it is to complicated. I like CEPH RBD because it does not have single point of failure.
              So I'm looking for something similar.

              From my point of vew XOSTOR is good idea, but in some cases there is no need to use all nodes as xcp-ng hosts. For example you do not need large amount of RAM and fast modern CPU for storage cluster nodes.
              I think the best solution in my case will be to deploy XOSTOR controller in xcp-ng cluster connected to separate storage cluster.

              At first glance, I assume that it should be possible to connect storage cluster to xcp-ng with this command
              linstor resource create node1 test1 --diskless

              So the base idea is to use xcp-ng nodes for linstor-controllers/linstor-satellite and "storage" nodes as linstor-satellite only.

              M 1 Reply Last reply Reply Quote 0
              • M
                Mark C @splastunov
                last edited by

                @splastunov / all.

                Just on multipath iSCSI. I had this running for years with separate switches running the 'A side' and 'B side' multipath networks between the iSCSI dot hill's resilient and redundant controllers.

                Once you have it configured, it is incredibly solid for what is a very budget solution. It just takes a bit of careful planning up front to make sure you wire up in a way that is properly resilient. Plus reliable monitoring to make sure that you notice when one of the resilient elements fails.

                We had a number of switch power supply failures over the 10 year period that were completely transparent to the services running on the connected XCP-NG and XenServer hosts.

                Similarly we were able to do a full DotHill controller replacement without any downtime after one of the two controllers failed.

                We also replaced the hypervisor hardware a number of times over the lifetime of the platform.

                splastunovS 1 Reply Last reply Reply Quote 0
                • splastunovS
                  splastunov @Mark C
                  last edited by

                  @Mark-C Thank you!
                  Could you tell please how you scale your storage with iSCSI? What hardware/software are you using for storage? Is it possible to add storage nodes on fly or you have to deploy new storag cluster every time when you grow?

                  M 1 Reply Last reply Reply Quote 0
                  • M
                    Mark C @splastunov
                    last edited by Mark C

                    @splastunov The DotHill certainly wasn't great for scaling out, because of the age of the firmware and the old-school treatment of the disk arrays.

                    We did deploy several disk expansion trays that were part populated at purchase as some level of expansion, and operated most of the array as a single underlying pool, which was then split up into iSCSI presented volumes.

                    So the limitations of the DotHill controllers and firmware we were using didn't address the storage pool scaling issue that CEPH / GPFS / etal are designed to.

                    However, some of the newer filer heads that treat their entire available disk array as a consolidated pool and support iSCSI would have that scalability, whilst keeping the hypervisor side relatively straight-forward.

                    CEPH etal are also in a much more mature place than they were back in the early 2010s too, so if I was doing it again, maybe we would go for a solution architecture based around that. Or XOSTOR, of course!

                    My intent was to present an iSCSI setup instance as something we found relatively bomb-proof, and post-initial configuration, relatively easy to scale. We provisioned 24 port A and B side network switches with jumbo frame support to give us the scalability to add further pools of hypervisors or storage, as required.

                    M 1 Reply Last reply Reply Quote 0
                    • M
                      Mark C @Mark C
                      last edited by Mark C

                      The typical hypervisor node was provisioned with at least 4 network ports, but most had 8 to allow trunking/resilience for every connection:

                      Management + live migration (Isolated)
                      World (Trunk)
                      iSCSI-A
                      iSCSI-B

                      The DotHills were 4 ports per controller, and the two controllers were configured as:

                      Management
                      iSCSI-A
                      iSCSI-B
                      Spare

                      The iSCSI-A and iSCSI-B were simple web-managed procurves with 24 ports each.

                      We had this scaled to 12 hypervisor nodes in 3 pools, all running off the same underlying dothill (dual redundant controller) hardware. We had provisioned some local SSD storage in each hypervisor for any nodes that were struggling for IOPs but ultimately never needed that.

                      1 Reply Last reply Reply Quote 0
                      • J
                        Jonathon
                        last edited by

                        OK we have debugged and improved this process, so including it here if it helps anyone else.

                        How to migrate resources between XOSTOR (linstor) clusters. This also works with piraeus-operator, which we use for k8s.

                        Manually moving listor resource with thin_send_recv

                        Migration of data

                        Commands
                        # PV: pvc-6408a214-6def-44c4-8d9a-bebb67be5510
# S: pgdata-snapshot
# s: 10741612544B

#get size
lvs --noheadings --units B -o lv_size linstor_group/pvc-6408a214-6def-44c4-8d9a-bebb67be5510_00000

#prep
lvcreate -V 10741612544B --thinpool linstor_group/thin_device -n pvc-6408a214-6def-44c4-8d9a-bebb67be5510_00000 linstor_group

#create snapshot
linstor --controller original-xostor-server s create pvc-6408a214-6def-44c4-8d9a-bebb67be5510  pgdata-snapshot

#send
thin_send linstor_group/pvc-6408a214-6def-44c4-8d9a-bebb67be5510_00000_pgdata-snapshot 2>/dev/null | ssh root@new-xostor-server-01 thin_recv linstor_group/pvc-6408a214-6def-44c4-8d9a-bebb67be5510_00000 2>/dev/null
                        Walk-through

                        Prep migration

                        [13:29 original-xostor-server ~]# lvs --noheadings --units B -o lv_size linstor_group/pvc-12aca72c-d94a-4c09-8102-0a6646906f8d_00000
  26851934208B


[13:53 new-xostor-server-01 ~]# lvcreate -V 26851934208B --thinpool linstor_group/thin_device -n pvc-12aca72c-d94a-4c09-8102-0a6646906f8d_00000 linstor_group
  Logical volume "pvc-12aca72c-d94a-4c09-8102-0a6646906f8d_00000" created.

                        Create snapshot

                        15:35:03] jonathon@jonathon-framework:~$ linstor --controller original-xostor-server s create pvc-12aca72c-d94a-4c09-8102-0a6646906f8d s_test
SUCCESS:
Description:
    New snapshot 's_test' of resource 'pvc-12aca72c-d94a-4c09-8102-0a6646906f8d' registered.
Details:
    Snapshot 's_test' of resource 'pvc-12aca72c-d94a-4c09-8102-0a6646906f8d' UUID is: 3a07d2fd-6dc3-4994-b13f-8c3a2bb206b8
SUCCESS:
    Suspended IO of '[pvc-12aca72c-d94a-4c09-8102-0a6646906f8d]' on 'ovbh-vprod-k8s04-worker02' for snapshot
SUCCESS:
    Suspended IO of '[pvc-12aca72c-d94a-4c09-8102-0a6646906f8d]' on 'original-xostor-server' for snapshot
SUCCESS:
    Took snapshot of '[pvc-12aca72c-d94a-4c09-8102-0a6646906f8d]' on 'ovbh-vprod-k8s04-worker02'
SUCCESS:
    Took snapshot of '[pvc-12aca72c-d94a-4c09-8102-0a6646906f8d]' on 'original-xostor-server'
SUCCESS:
    Resumed IO of '[pvc-12aca72c-d94a-4c09-8102-0a6646906f8d]' on 'ovbh-vprod-k8s04-worker02' after snapshot
SUCCESS:
    Resumed IO of '[pvc-12aca72c-d94a-4c09-8102-0a6646906f8d]' on 'original-xostor-server' after snapshot

                        Migration

                        [13:53 original-xostor-server ~]# thin_send /dev/linstor_group/pvc-12aca72c-d94a-4c09-8102-0a6646906f8d_00000_s_test 2>/dev/null | ssh root@new-xostor-server-01 thin_recv linstor_group/pvc-12aca72c-d94a-4c09-8102-0a6646906f8d_00000 2>/dev/null

                        Need to yeet errors on both ends of command or it will fail.

                        This is the same setup process for replica-1 or replica-3. For replica-3 can target new-xostor-server-01 each time, for replica-1 be sure to spread them out right.

                        Replica-3 Setup

                        Explanation

                        thin_send to new-xostor-server-01, will need to run commands to force sync of data to replicas.

                        Commands
                        # PV: pvc-96cbebbe-f827-4a47-ae95-38b078e0d584
# snapshot: snipeit-snapshot
# size: 21483225088B

#get size
lvs --noheadings --units B -o lv_size linstor_group/pvc-96cbebbe-f827-4a47-ae95-38b078e0d584_00000

#prep
lvcreate -V 21483225088B --thinpool linstor_group/thin_device -n pvc-96cbebbe-f827-4a47-ae95-38b078e0d584_00000 linstor_group

#create snapshot
linstor --controller original-xostor-server s create pvc-96cbebbe-f827-4a47-ae95-38b078e0d584 snipeit-snapshot
linstor --controller original-xostor-server s l | grep -e 'snipeit-snapshot'

#send
thin_send linstor_group/pvc-96cbebbe-f827-4a47-ae95-38b078e0d584_00000_snipeit-snapshot 2>/dev/null | ssh root@new-xostor-server-01 thin_recv linstor_group/pvc-96cbebbe-f827-4a47-ae95-38b078e0d584_00000 2>/dev/null

#linstor setup
linstor --controller new-xostor-server-01 resource-definition create pvc-96cbebbe-f827-4a47-ae95-38b078e0d584 --resource-group sc-74e1434b-b435-587e-9dea-fa067deec898
linstor --controller new-xostor-server-01 volume-definition create pvc-96cbebbe-f827-4a47-ae95-38b078e0d584 21483225088B --storage-pool xcp-sr-linstor_group_thin_device

linstor --controller new-xostor-server-01 resource create --storage-pool xcp-sr-linstor_group_thin_device --providers LVM_THIN new-xostor-server-01 pvc-96cbebbe-f827-4a47-ae95-38b078e0d584
linstor --controller new-xostor-server-01 resource create --auto-place +1 pvc-96cbebbe-f827-4a47-ae95-38b078e0d584

#Run the following on the node with the data. This is the prefered command
drbdadm invalidate-remote pvc-96cbebbe-f827-4a47-ae95-38b078e0d584
#Run the following on the node without the data. This is just for reference
drbdadm invalidate pvc-96cbebbe-f827-4a47-ae95-38b078e0d584

linstor --controller new-xostor-server-01 r l | grep -e 'pvc-96cbebbe-f827-4a47-ae95-38b078e0d584'

                        ---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: pvc-96cbebbe-f827-4a47-ae95-38b078e0d584
  annotations:
    pv.kubernetes.io/provisioned-by: linstor.csi.linbit.com
  finalizers:
    - external-provisioner.volume.kubernetes.io/finalizer
    - kubernetes.io/pv-protection
    - external-attacher/linstor-csi-linbit-com
spec:
  accessModes:
    - ReadWriteOnce
  capacity:
    storage: 20Gi # Ensure this matches the actual size of the LINSTOR volume
  persistentVolumeReclaimPolicy: Retain
  storageClassName: linstor-replica-three # Adjust to the storage class you want to use
  volumeMode: Filesystem
  csi:
    driver: linstor.csi.linbit.com
    fsType: ext4
    volumeHandle: pvc-96cbebbe-f827-4a47-ae95-38b078e0d584
    volumeAttributes:
      linstor.csi.linbit.com/mount-options: ''
      linstor.csi.linbit.com/post-mount-xfs-opts: ''
      linstor.csi.linbit.com/uses-volume-context: 'true'
      linstor.csi.linbit.com/remote-access-policy: 'true'
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  annotations:
    pv.kubernetes.io/bind-completed: 'yes'
    pv.kubernetes.io/bound-by-controller: 'yes'
    volume.beta.kubernetes.io/storage-provisioner: linstor.csi.linbit.com
    volume.kubernetes.io/storage-provisioner: linstor.csi.linbit.com
  finalizers:
    - kubernetes.io/pvc-protection
  name: pp-snipeit-pvc
  namespace: snipe-it
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 20Gi
  storageClassName: linstor-replica-three
  volumeMode: Filesystem
  volumeName: pvc-96cbebbe-f827-4a47-ae95-38b078e0d584
                        Walk-through
                        jonathon@jonathon-framework:~$ linstor --controller new-xostor-server-01 resource-definition create pvc-96cbebbe-f827-4a47-ae95-38b078e0d584 --resource-group sc-74e1434b-b435-587e-9dea-fa067deec898
SUCCESS:
Description:
    New resource definition 'pvc-96cbebbe-f827-4a47-ae95-38b078e0d584' created.
Details:
    Resource definition 'pvc-96cbebbe-f827-4a47-ae95-38b078e0d584' UUID is: 772692e2-3fca-4069-92e9-2bef22c68a6f
jonathon@jonathon-framework:~$ linstor --controller new-xostor-server-01 volume-definition create pvc-96cbebbe-f827-4a47-ae95-38b078e0d584 21483225088B --storage-pool xcp-sr-linstor_group_thin_device
SUCCESS:
    Successfully set property key(s): StorPoolName
SUCCESS:
    New volume definition with number '0' of resource definition 'pvc-96cbebbe-f827-4a47-ae95-38b078e0d584' created.
jonathon@jonathon-framework:~$ linstor --controller new-xostor-server-01 resource create --storage-pool xcp-sr-linstor_group_thin_device --providers LVM_THIN new-xostor-server-01 pvc-96cbebbe-f827-4a47-ae95-38b078e0d584
SUCCESS:
    Successfully set property key(s): StorPoolName
INFO:
    Updated pvc-96cbebbe-f827-4a47-ae95-38b078e0d584 DRBD auto verify algorithm to 'crct10dif-pclmul'
SUCCESS:
Description:
    New resource 'pvc-96cbebbe-f827-4a47-ae95-38b078e0d584' on node 'new-xostor-server-01' registered.
Details:
    Resource 'pvc-96cbebbe-f827-4a47-ae95-38b078e0d584' on node 'new-xostor-server-01' UUID is: 3072aaae-4a34-453e-bdc6-facb47809b3d
SUCCESS:
Description:
    Volume with number '0' on resource 'pvc-96cbebbe-f827-4a47-ae95-38b078e0d584' on node 'new-xostor-server-01' successfully registered
Details:
    Volume UUID is: 52b11ef6-ec50-42fb-8710-1d3f8c15c657
SUCCESS:
    Created resource 'pvc-96cbebbe-f827-4a47-ae95-38b078e0d584' on 'new-xostor-server-01'
jonathon@jonathon-framework:~$ linstor --controller new-xostor-server-01 resource create --auto-place +1 pvc-96cbebbe-f827-4a47-ae95-38b078e0d584
SUCCESS:
    Successfully set property key(s): StorPoolName
SUCCESS:
    Successfully set property key(s): StorPoolName
SUCCESS:
Description:
    Resource 'pvc-96cbebbe-f827-4a47-ae95-38b078e0d584' successfully autoplaced on 2 nodes
Details:
    Used nodes (storage pool name): 'new-xostor-server-02 (xcp-sr-linstor_group_thin_device)', 'new-xostor-server-03 (xcp-sr-linstor_group_thin_device)'
INFO:
    Resource-definition property 'DrbdOptions/Resource/quorum' updated from 'off' to 'majority' by auto-quorum
INFO:
    Resource-definition property 'DrbdOptions/Resource/on-no-quorum' updated from 'off' to 'suspend-io' by auto-quorum
SUCCESS:
    Added peer(s) 'new-xostor-server-02', 'new-xostor-server-03' to resource 'pvc-96cbebbe-f827-4a47-ae95-38b078e0d584' on 'new-xostor-server-01'
SUCCESS:
    Created resource 'pvc-96cbebbe-f827-4a47-ae95-38b078e0d584' on 'new-xostor-server-02'
SUCCESS:
    Created resource 'pvc-96cbebbe-f827-4a47-ae95-38b078e0d584' on 'new-xostor-server-03'
SUCCESS:
Description:
    Resource 'pvc-96cbebbe-f827-4a47-ae95-38b078e0d584' on 'new-xostor-server-03' ready
Details:
    Auto-placing resource: pvc-96cbebbe-f827-4a47-ae95-38b078e0d584
SUCCESS:
Description:
    Resource 'pvc-96cbebbe-f827-4a47-ae95-38b078e0d584' on 'new-xostor-server-02' ready
Details:
    Auto-placing resource: pvc-96cbebbe-f827-4a47-ae95-38b078e0d584

                        At this point

                        jonathon@jonathon-framework:~$ linstor --controller new-xostor-server-01 v l | grep -e 'pvc-96cbebbe-f827-4a47-ae95-38b078e0d584'
| new-xostor-server-01                         | pvc-96cbebbe-f827-4a47-ae95-38b078e0d584        | xcp-sr-linstor_group_thin_device |     0 |    1032 | /dev/drbd1032 |   9.20 GiB | Unused | UpToDate |
| new-xostor-server-02                         | pvc-96cbebbe-f827-4a47-ae95-38b078e0d584        | xcp-sr-linstor_group_thin_device |     0 |    1032 | /dev/drbd1032 | 112.73 MiB | Unused | UpToDate |
| new-xostor-server-03                         | pvc-96cbebbe-f827-4a47-ae95-38b078e0d584        | xcp-sr-linstor_group_thin_device |     0 |    1032 | /dev/drbd1032 | 112.73 MiB | Unused | UpToDate |

                        To force the sync, run the following command on the node with the data

                        drbdadm invalidate-remote pvc-96cbebbe-f827-4a47-ae95-38b078e0d584

                        This will kick it to get the data re-synced.

                        [14:51 new-xostor-server-01 ~]# drbdadm invalidate-remote pvc-96cbebbe-f827-4a47-ae95-38b078e0d584
[14:51 new-xostor-server-01 ~]# drbdadm status pvc-96cbebbe-f827-4a47-ae95-38b078e0d584
pvc-96cbebbe-f827-4a47-ae95-38b078e0d584 role:Secondary
  disk:UpToDate
  new-xostor-server-02 role:Secondary
    replication:SyncSource peer-disk:Inconsistent done:1.14
  new-xostor-server-03 role:Secondary
    replication:SyncSource peer-disk:Inconsistent done:1.18

[14:51 new-xostor-server-01 ~]# drbdadm status pvc-96cbebbe-f827-4a47-ae95-38b078e0d584
pvc-96cbebbe-f827-4a47-ae95-38b078e0d584 role:Secondary
  disk:UpToDate
  new-xostor-server-02 role:Secondary
    peer-disk:UpToDate
  new-xostor-server-03 role:Secondary
    peer-disk:UpToDate

                        See: https://github.com/LINBIT/linstor-server/issues/389

                        Replica-1setup

                        # PV: pvc-6408a214-6def-44c4-8d9a-bebb67be5510
# S: pgdata-snapshot
# s: 10741612544B

#get size
lvs --noheadings --units B -o lv_size linstor_group/pvc-6408a214-6def-44c4-8d9a-bebb67be5510_00000

#prep
lvcreate -V 10741612544B --thinpool linstor_group/thin_device -n pvc-6408a214-6def-44c4-8d9a-bebb67be5510_00000 linstor_group

#create snapshot
linstor --controller original-xostor-server s create pvc-6408a214-6def-44c4-8d9a-bebb67be5510  pgdata-snapshot

#send
thin_send linstor_group/pvc-6408a214-6def-44c4-8d9a-bebb67be5510_00000_pgdata-snapshot 2>/dev/null | ssh root@new-xostor-server-01 thin_recv linstor_group/pvc-6408a214-6def-44c4-8d9a-bebb67be5510_00000 2>/dev/null

# 1
linstor --controller new-xostor-server-01 resource-definition create pvc-6408a214-6def-44c4-8d9a-bebb67be5510  --resource-group sc-b066e430-6206-5588-a490-cc91ecef53d6
linstor --controller new-xostor-server-01 volume-definition create pvc-6408a214-6def-44c4-8d9a-bebb67be5510  10741612544B --storage-pool xcp-sr-linstor_group_thin_device
linstor --controller new-xostor-server-01 resource create new-xostor-server-01 pvc-6408a214-6def-44c4-8d9a-bebb67be5510 


                        ---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: pvc-6408a214-6def-44c4-8d9a-bebb67be5510
  annotations:
    pv.kubernetes.io/provisioned-by: linstor.csi.linbit.com
  finalizers:
    - external-provisioner.volume.kubernetes.io/finalizer
    - kubernetes.io/pv-protection
    - external-attacher/linstor-csi-linbit-com
spec:
  accessModes:
    - ReadWriteOnce
  capacity:
    storage: 10Gi # Ensure this matches the actual size of the LINSTOR volume
  persistentVolumeReclaimPolicy: Retain
  storageClassName: linstor-replica-one-local # Adjust to the storage class you want to use
  volumeMode: Filesystem
  csi:
    driver: linstor.csi.linbit.com
    fsType: ext4
    volumeHandle: pvc-6408a214-6def-44c4-8d9a-bebb67be5510
    volumeAttributes:
      linstor.csi.linbit.com/mount-options: ''
      linstor.csi.linbit.com/post-mount-xfs-opts: ''
      linstor.csi.linbit.com/uses-volume-context: 'true'
      linstor.csi.linbit.com/remote-access-policy: |
        - fromSame:
            - xcp-ng/node
  nodeAffinity:
    required:
      nodeSelectorTerms:
        - matchExpressions:
            - key: xcp-ng/node
              operator: In
              values:
                - new-xostor-server-01
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  annotations:
    pv.kubernetes.io/bind-completed: 'yes'
    pv.kubernetes.io/bound-by-controller: 'yes'
    volume.beta.kubernetes.io/storage-provisioner: linstor.csi.linbit.com
    volume.kubernetes.io/selected-node: ovbh-vtest-k8s01-worker01
    volume.kubernetes.io/storage-provisioner: linstor.csi.linbit.com
  finalizers:
    - kubernetes.io/pvc-protection
  name: acid-merch-2
  namespace: default
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 10Gi
  storageClassName: linstor-replica-one-local
  volumeMode: Filesystem
  volumeName: pvc-6408a214-6def-44c4-8d9a-bebb67be5510
                        0sorkon created this issue in LINBIT/linstor-server

                        open Incorrect replica size after resource-definition auto-place #389

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