Hola Leandro,
El 28/2/20 a las 15:25, Leandro Roggerone escribió:
When you talk about redundacy and availability, do you want...
- HA? (automatic restart of VMs in the other node in case one server fails)
- Be able to move VMs from one server to the other "fast" (without
copying the disks)?
Yes , this is what I want.
So regarding my original layout from my 5.5Tb storage:
Im using 1T for LVM , 1TB for LVM-thin and 3.5 TB unassigned space, is it
ok to use this unassigned space for a ceph ?
Can I set it later ? with server on production ?
You can configure Ceph later, with the server in production, yes.
But for Ceph you want single disks, no RAID. So I'd build the server
with a 2x2TB RAID1 and leave the other 2x2TB disks for adding to Ceph.
Also, read a bit about Ceph before deploying, it is not "sinple" :-)
https://docs.ceph.com/docs/master/start/intro/
Other:
Using an NFS system, means to have an external server running a file sistem?
So you should have at least two servers for the cluster and one for the
file system?
It seems to me that using ceph has a better redundancy plan an it is easier
to deploy since I only need two servers. (am i right?).
For Ceph you need at least 3 servers; one of them can be a simple PC but
you need it for Ceph monitor's quorum. It is recommended too for Proxmox
cluster, for the same reason.
Really a NFS based solution is simpler, but then NFS server is a simple
point of failure. Ceph will be more resilient, but you have to
understand how it works. You may find that having only two servers with
Ceph storage can be risky when performing maintenance on one of the servers.
Saludos
Eneko
Thanks!
El vie., 28 feb. 2020 a las 11:06, Eneko Lacunza (<elacu...@binovo.es>)
escribió:
Hola Leandro,
El 28/2/20 a las 14:43, Leandro Roggerone escribió:
Regarding your question , what is the tarjet use for this server.
I have a dell R610 with 6 drive bays.
Today I have 4 (2TB) drives in Raid5 , resulting a 5.5TB capacity.
I will add 2 ssd drives later in raid1 for applications that need more
read
speed.
The purpose for this server is to run proxmox with some VMs for external
and internal access.
Im planning to build a second server and create a cluster just to have
more
redundancy and availability.
I would like to set all I can now that server is not in production and
minimize risk later.
Thats why im asking so many questions.
Asking is good, but we need info to be able to help you ;)
When you talk about redundacy and availability, do you want...
- HA? (automatic restart of VMs in the other node in case one server fails)
- Be able to move VMs from one server to the other "fast" (without
copying the disks)?
If your answer is yes to any of the previous questions, you have to look
at using a NFS server or deploying Ceph.
If it's no, then we can talk about local storage in your servers. What
RAID card do you have in that server? Does it have write cache (non
volatile of battery-backed) If it doesn't have such, RAID5 could prove
slow (eat quite CPU), I suggest you use 2xRAID1 or a RAID10 setup. Also,
please bear in mind that RAID5 with "big" disks is considered quite
unsecure (risk of having a second disk failure during recovery is high).
Saludos
Eneko
Regards.
Leandro.
El vie., 28 feb. 2020 a las 5:49, Eneko Lacunza (<elacu...@binovo.es>)
escribió:
Hola Leandro,
El 27/2/20 a las 17:29, Leandro Roggerone escribió:
Hi guys , i'm still tunning my 5.5 Tb server.
While setting storage options during install process, I set 2000 for hd
size, so I have 3.5 TB free to assign later.
my layout is as follows:
root@pve:~# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 5.5T 0 disk
├─sda1 8:1 0 1007K 0 part
├─sda2 8:2 0 512M 0 part
└─sda3 8:3 0 2T 0 part
├─pve-swap 253:0 0 8G 0 lvm [SWAP]
├─pve-root 253:1 0 1T 0 lvm /
├─pve-data_tmeta 253:2 0 9G 0 lvm
│ └─pve-data 253:4 0 949.6G 0 lvm
└─pve-data_tdata 253:3 0 949.6G 0 lvm
└─pve-data 253:4 0 949.6G 0 lvm
sr0 11:0 1 1024M 0 rom
My question is:
Is it possible to expand sda3 partition later without service outage ?
Is it possible to expand pve group on sda3 partition ?
You don't need to expand sda3 really. You can just create a new
partition, create a new PV with it and add the new PV to pve VG.
In case to create a proxmox cluster, what should I do with that 3.5 TB
free
?
I don't know really how to reply to this. If you're building a cluster,
I suggest you configure some kind of shared storage; NFS server or Ceph
cluster for example.
Is there a best partition type suited for this ? Can I do it without
service outage?
For what?
I have not any service running yet , so I can experiment what it takes.
Any thought about this would be great.
Maybe you can start telling us your target use for this server/cluster.
Also some detailed spec of the server would help; for example does it
have a RAID card with more than one disk, or you're using a 6TB single
disk?
Cheers
Eneko
--
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Binovo IT Human Project, S.L.
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Binovo IT Human Project, S.L.
Telf. 943569206
Astigarragako bidea 2, 2º izq. oficina 11; 20180 Oiartzun (Gipuzkoa)
www.binovo.es
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Binovo IT Human Project, S.L.
Telf. 943569206
Astigarragako bidea 2, 2º izq. oficina 11; 20180 Oiartzun (Gipuzkoa)
www.binovo.es
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