1:55 p.m.
Hi,
After playing a bit with oVirt and Gluster in our pre-production environment for the last
year, we have decided to move forward with a our production design using ovirt 4.3.7 +
Gluster in a hyperconverged setup.
For this we are looking get answers to a few questions that will help out with our design
and eventually lead to our production deployment phase:
Current HW specs (total servers = 18):
1.- Server type: DL380 GEN 9
2.- Memory: 256GB
3.-Disk QTY per hypervisor:
- 2x600GB SAS (RAID 0) for the OS
- 9x1.2TB SSD (RAID[0, 6..]..? ) for GLUSTER.
4.-Network:
- Bond1: 2x10Gbps
- Bond2: 2x10Gbps (for migration and gluster)
Our plan is to build 2x9 node clusters, however the following questions come up:
1.-Should we build 2 separate environments each with its own engine? or should we do 1
engine that will manage both clusters?
2.-What would be the best gluster volume layout for #1 above with regards to RAID
configuration:
- JBOD or RAID6 or…?.
- what is the benefit or downside of using JBOD vs RAID 6 for this particular scenario?
3.-Would you recommend Ansible-based deployment (if supported)? If yes where would I find
the documentation for it? or should we just deploy using the UI?.
- I have reviewed the following and in Chapter 5 it only mentions Web UI
https://access.redhat.com/documentation/en-us/red_hat_hyperconverged_infr...
- Also looked at
https://github.com/gluster/gluster-ansible/tree/master/playbooks/hc-ansib... but
could not get it to work properly.
4.-what is the recommended max server qty in a hyperconverged setup with gluster, 12, 15,
18...?
Thanks,
Adrian
4:18 p.m.
If you can afford it I would definitely do raid. Being able to monitor and
replace disks at the raid level is much easier than brick. With raid I’d do
a gluster arbiter setup so your aren’t losing too much space.
Keep an eye on libgfapi. It’s not default setting due to a few bugs but
I’ve been testing it in my ssd hci cluster and have been seeing up to 5x io
improvement. Also jumbo frames on those 10Gbps switches.
Someone else will probably chime in re the other questions. I believe the
GUI can only deploy a three sever cluster then you have to add the
remaining hosts afterward.
On Mon, Dec 23, 2019 at 5:56 PM <adrianquintero(a)gmail.com> wrote:
Hi,
After playing a bit with oVirt and Gluster in our pre-production
environment for the last year, we have decided to move forward with a our
production design using ovirt 4.3.7 + Gluster in a hyperconverged setup.
For this we are looking get answers to a few questions that will help out
with our design and eventually lead to our production deployment phase:
Current HW specs (total servers = 18):
1.- Server type: DL380 GEN 9
2.- Memory: 256GB
3.-Disk QTY per hypervisor:
- 2x600GB SAS (RAID 0) for the OS
- 9x1.2TB SSD (RAID[0, 6..]..? ) for GLUSTER.
4.-Network:
- Bond1: 2x10Gbps
- Bond2: 2x10Gbps (for migration and gluster)
Our plan is to build 2x9 node clusters, however the following questions
come up:
1.-Should we build 2 separate environments each with its own engine? or
should we do 1 engine that will manage both clusters?
2.-What would be the best gluster volume layout for #1 above with regards
to RAID configuration:
- JBOD or RAID6 or…?.
- what is the benefit or downside of using JBOD vs RAID 6 for this
particular scenario?
3.-Would you recommend Ansible-based deployment (if supported)? If yes
where would I find the documentation for it? or should we just deploy using
the UI?.
- I have reviewed the following and in Chapter 5 it only mentions Web UI
https://access.redhat.com/documentation/en-us/red_hat_hyperconverged_infr...
- Also looked at
https://github.com/gluster/gluster-ansible/tree/master/playbooks/hc-ansib...
but could not get it to work properly.
4.-what is the recommended max server qty in a hyperconverged setup with
gluster, 12, 15, 18...?
Thanks,
Adrian
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2:33 a.m.
On Tue, Dec 24, 2019 at 3:26 AM <adrianquintero(a)gmail.com> wrote:
Hi,
After playing a bit with oVirt and Gluster in our pre-production
environment for the last year, we have decided to move forward with a our
production design using ovirt 4.3.7 + Gluster in a hyperconverged setup.
For this we are looking get answers to a few questions that will help out
with our design and eventually lead to our production deployment phase:
Current HW specs (total servers = 18):
1.- Server type: DL380 GEN 9
2.- Memory: 256GB
3.-Disk QTY per hypervisor:
- 2x600GB SAS (RAID 0) for the OS
- 9x1.2TB SSD (RAID[0, 6..]..? ) for GLUSTER.
4.-Network:
- Bond1: 2x10Gbps
- Bond2: 2x10Gbps (for migration and gluster)
Our plan is to build 2x9 node clusters, however the following questions
come up:
1.-Should we build 2 separate environments each with its own engine? or
should we do 1 engine that will manage both clusters?
If you want the environments independent of each other, having separate
with its own engine make sense. Also the example ansible playbooks deploy
the environment with engine, so if you choose otherwise, you may need to
tweak the deployment scripts
2.-What would be the best gluster volume layout for #1 above with regards
to RAID configuration:
- JBOD or RAID6 or…?.
- what is the benefit or downside of using JBOD vs RAID 6 for this
particular scenario?
Preferably RAID6. With JBOD, you would have to create a 9x3 distributed
replicate volume and leave the healing of data to gluster, while with RAID
if you lose a disk this is at RAID controller level.
3.-Would you recommend Ansible-based deployment (if supported)? If
yes
where would I find the documentation for it? or should we just deploy using
the UI?.
- I have reviewed the following and in Chapter 5 it only mentions Web UI
https://access.redhat.com/documentation/en-us/red_hat_hyperconverged_infr...
- Also looked at
https://github.com/gluster/gluster-ansible/tree/master/playbooks/hc-ansib...
but could not get it to work properly.
If you want to deploy a 12 node setup, then an ansible playbook is
available. +Gobinda Das <godas(a)redhat.com> in case you have questions on
this.
4.-what is the recommended max server qty in a hyperconverged setup with
gluster, 12, 15, 18...?
12 is the tested configuration, but there's no technical limitation against
expanding to 15 or 18.
Thanks,
Adrian
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