On Tue, Jul 14, 2020 at 3:50 AM <clam2...@gmail.com> wrote:

> Hi,
>
> Deploying oVirt 4.4.1.1 via Cockpit --> Hosted Engine --> Hyperconverged
> fails at Gluster deployment:
>
> TASK [gluster.infra/roles/backend_setup : Create thick logical volume]
> *********
> failed: [fmov1n3.sn.dtcorp.com] (item={'vgname': 'gluster_vg_nvme0n1',
> 'lvname': 'gluster_lv_engine', 'size': '100G'}) => {"ansible_index_var":
> "index", "ansible_loop_var": "item", "changed": false, "err": "  Volume
> group \"gluster_vg_nvme0n1\" has insufficient free space (25599 extents):
> 25600 required.\n", "index": 0, "item": {"lvname": "gluster_lv_engine",
> "size": "100G", "vgname": "gluster_vg_nvme0n1"}, "msg": "Creating logical
> volume 'gluster_lv_engine' failed", "rc": 5}
> failed: [fmov1n1.sn.dtcorp.com] (item={'vgname': 'gluster_vg_nvme0n1',
> 'lvname': 'gluster_lv_engine', 'size': '100G'}) => {"ansible_index_var":
> "index", "ansible_loop_var": "item", "changed": false, "err": "  Volume
> group \"gluster_vg_nvme0n1\" has insufficient free space (25599 extents):
> 25600 required.\n", "index": 0, "item": {"lvname": "gluster_lv_engine",
> "size": "100G", "vgname": "gluster_vg_nvme0n1"}, "msg": "Creating logical
> volume 'gluster_lv_engine' failed", "rc": 5}
> failed: [fmov1n2.sn.dtcorp.com] (item={'vgname': 'gluster_vg_nvme0n1',
> 'lvname': 'gluster_lv_engine', 'size': '100G'}) => {"ansible_index_var":
> "index", "ansible_loop_var": "item", "changed": false, "err": "  Volume
> group \"gluster_vg_nvme0n1\" has insufficient free space (25599 extents):
> 25600 required.\n", "index": 0, "item": {"lvname": "gluster_lv_engine",
> "size": "100G", "vgname": "gluster_vg_nvme0n1"}, "msg": "Creating logical
> volume 'gluster_lv_engine' failed", "rc": 5}
>
> Deployment is on 3 count Dell PowerEdge R740xd with 5 count 1.6TB NVMe
> drives per host.  Deployment is only to three as JBOD, 1 drive per node per
> volume (engine, data, vmstore) utilizing VDO.
>  Thus, deploying even a 100G volume to 1.6TB drive fails with
> "insufficient free space" error.
>
> I suspect this might have to do with the Ansible playbook deploying
> Gluster mishandling the logical volume creation due to the rounding error
> as described here:
> https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/logical_volume_manager_administration/nofreeext
>
> If I can provide any additional information, logs, etc. please ask.  Also,
> if anyone has experience/suggestions with Gluster config for hyperconverged
> setup on NVMe drives I would greatly appreciate any pearls of wisdom.
>

Can you provide the output of pvdisplay command on all hosts.


>
> Thank you so very much for any assistance!
> Charles
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