Best practice partition & LVM for KVM
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@tim_g said in Best practice partition & LVM for KVM:
Patched and most recent CentOS, plus most recent stable oVirt I think is better than running old Fedora plus old oVirt.
Right, better, but I don't count it as good. I'm saying that CentOS doesn't offer something I'm happy with for KVM.
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@scottalanmiller said in Best practice partition & LVM for KVM:
@tim_g said in Best practice partition & LVM for KVM:
Patched and most recent CentOS, plus most recent stable oVirt I think is better than running old Fedora plus old oVirt.
Right, better, but I don't count it as good. I'm saying that CentOS doesn't offer something I'm happy with for KVM.
Then don't run KVM on it. You can set up some CentOS VM for only oVirt Engine. Then you can set up your Fedora KVM hypervisors with oVirt Node to do the hypervising.
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@tim_g said in Best practice partition & LVM for KVM:
@scottalanmiller said in Best practice partition & LVM for KVM:
@tim_g said in Best practice partition & LVM for KVM:
Patched and most recent CentOS, plus most recent stable oVirt I think is better than running old Fedora plus old oVirt.
Right, better, but I don't count it as good. I'm saying that CentOS doesn't offer something I'm happy with for KVM.
Then don't run KVM on it. You can set up some CentOS VM for only oVirt Engine. Then you can set up your Fedora KVM hypervisors with oVirt Node to do the hypervising.
OIC, it can be a pure oVirt VM, KVM still on Fedora?
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Yes.. I just thought of something...
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@tim_g said in Best practice partition & LVM for KVM:
Yes.. I just thought of something...
What's taht?
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I'd have to verify, but maybe one could set up a Fedora hypervisor, and run a CentOS VM on it for oVirt Engine... and oVirt Node on the Fedora host?
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Technically that's not self-hosted.... so I think that would work.
I mean as far as what they consider self-hosted.
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I just don't know how production worthy that is without testing it first... I guess if you make the oVirt Engine VM HA, that could work. (or at least replicated)
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@tim_g said in Best practice partition & LVM for KVM:
@kuyaz said in Best practice partition & LVM for KVM:
LVG : vg_ssd_critical_vm
/vm (ssd)
LVG : vg_sata_non_critical_vm
/boot 2GB
/bootBIOS 1GB
/root (ALL remaining space)
/swap (32GB)I'd use XFS. Don't use EXT4. You're correct with using LVM.
I'd go like this:
LVG : vg_ssd_critical_vm
/DATAssdLVG : vg_sata_non_critical_vm
/DATAhdd (xfs)
/boot 2GB (xfs)
/bootBIOS 1GB
/root 50GB (xfs)
/swap 32GB (swap)
/home whatever (xfs)As @travisdh1 said, you'll need space for snapshots of the LVMs, but don't do it for the VMs. Use VM snapshots for those instead.
You're VMs should be RAW (.img) for better performance.
So i put the vmware img in the dataHDD?
Please note this is for production server running sql and web apps (it it matters).What is the disadvantage if i dont separate the datahdd and home from root? Mine is all lumped in root.
Will redo since im not too far off.
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@tim_g another one is because Dell always issue RHEL package which normally is compatible with centos. Never try it with fedora, so not sure it will run well. ie. Omsa dell.
Related to KVM, what fedora can offer that CentOs cant?
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For a KVM server or Linux VMs, wouldn’t it be better to use swapfile instead of a swap partition?
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@black3dynamite said in Best practice partition & LVM for KVM:
For a KVM server or Linux VMs, wouldn’t it be better to use swapfile instead of a swap partition?
That’s the general consensus today.
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@kuyaz said in Best practice partition & LVM for KVM:
@tim_g another one is because Dell always issue RHEL package which normally is compatible with centos. Never try it with fedora, so not sure it will run well. ie. Omsa dell.
Related to KVM, what fedora can offer that CentOs cant?
Fedora is dramatically more modern. Years newer than a CentOS
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@kuyaz said in Best practice partition & LVM for KVM:
/root (ALL remaining space)
/root != /
/root is home directory for root user
/ is root directory -
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Even Nutanix (I think) also runs CentOS:
https://www.nutanix.com/partners/technology-alliance-program/centos/ -
@fateknollogee yup CentOs normally has better wide range of support. Thats the reason i stick to it even it is less modern than fedora.
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@kuyaz said in Best practice partition & LVM for KVM:
@fateknollogee yup CentOs normally has better wide range of support. Thats the reason i stick to it even it is less modern than fedora.
For me, by default, I use Fedora first. Unless the application that I’m using specifically requires the use of CentOS.
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@fateknollogee said in Best practice partition & LVM for KVM:
Even Nutanix (I think) also runs CentOS:
https://www.nutanix.com/partners/technology-alliance-program/centos/What do you mean "even"? I wouldn't touch Nutanix with a ten foot pole.
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@kuyaz said in Best practice partition & LVM for KVM:
@fateknollogee yup CentOs normally has better wide range of support. Thats the reason i stick to it even it is less modern than fedora.
Define "wide range of support"? One of the reasons a lot of us don't use it is that you have to work around the lack of support all of the time.
