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 Stupid Newbie Questions, Exactly what it says on the tin. :-) (14 Replies, Read 19660 times)
Baylink
Group: Member
Post Group: Newbie
Posts: 11
Status:
I'm a 30 year Unix/Linux admin by profession, but I haven't dabbled much in either virtualization or hosting, and it is -- as much as anything -- time to expand my skill set in a new and useful direction.

I'm working through the V tour and wiki, and several questions will occur to me as I go; I'm going to post them all here, rather than spray them out across a bunch of threads, in the hope of not making as much of a mess.

Hopefully, y'all will find them comprehensible, rather than compost.

First: my goal.

I'm going to grab a used HP server, something dual-quad Xeon like a DL180g6, which has up to 8 cores, 192GB of RAM, and 12 3.5" SAS/SATA drive slots on the front in 2U.

My local datacenter, the reknown E-Solutions/WOW in Park Tower Tampa will rent me 2U with power for $100 a month.

So I'll bump the base RAM to 32 or 64GB, and toss in a couple 146GB 15K boot drives in RAID1 for base storage, and set up CentOS 6/64 as a host OS.

(Side note: almost nobody anywhere, ever -- and especially all the Virtualizor copy I read -- *ever* distinguishes host OS from guest OS, and it's *always* important, sometimes verging on critical: why doesn't anyone make the distinction?)

Then I'll install the current Virtualizor, and set up a 'utility' VPS for doing all my "real" work; management, monitoring with cacti, and that sort of thing, since I've been told somewhere that installing other control panels and such on your Host OS is a Real Bad Idea.

Then I'll set up one or more "customer" VPSs for things like email (with Zimbra), CMS (probably Drupal, at the moment, but I need to look at WebGUI again), DNS and other services.

My target is to co-op the box with some friends who need hosting space, and possible a couple of my existing customers who are in the same position.  I don't propose to guarantee more than 2-nines uptime for the first year, which will limit whom I might want as a customer -- bsaically, it will be me, and my cellphone.  So while I need production-grade software (not, say, HyperVM ;-), I don't need *carrier*-grade.

And that brings me to my first couple of questions:

===

KVM seems more flexible on a "what can I run" basis, while OpenVZ seems more flexible from a RAM efficiency basis; I gather I can't run both on the same hardware?

Next: the OS templates for KVM are an order of magnitude larger in size than the OpenVZ templates, and the Xen ones aren't much larger than OpenVZ; say maybe double the size.  Why the large discrepancy?

At that point, my next question will be -- since it's the other thing I want to delve into -- how, if at all, will OpenStack interact with Virtualizor?  I have the impression that they'll, but also that they might be made to cooperate with work; OS seems about half a layer higher in the stack than KVM/V.  Is that a valid appraisal?

Also: the Tour says that V supports "VNC and SSH to your VPS".  Does that mean "to the virtualized hardware console of the VPS"?  Cause *that* would be noteworthy, and the only thing I can think of about which they'd actually be bragging.  But the Tour isn't clear.

Finally, for the first round: I am very fond of using Cacti, Ganglia, and other such monitoring tools to watch things on the machine -- especially bandwidth.  I'll want to be able to see IPv4/v6 In/Out for both each individual VPS *and* the physical interface, *from the Host OS*.

Can I do that?  Is it set up automatically?  If I want that, and some sort of user CP *inside* a VPS image, I assume I have to rebuild the image template to include that sort of thing?  How hard is it to rebuild the provided image templates for that?

Ok, that's about 35 questions.  Sorry.  :-)

If enough of those come back positive, then I'll grab the demo and set it up on this spare box I have here.  Once I find all the cables for it.  And dig it out of the storage room.
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Stupid Newbie Questions
Baylink
Group: Member
Post Group: Newbie
Posts: 11
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Clarification: That rate is from StabilityHosting, who are *in* E-Sol, not from WOW themselves; James and Erron, who run SH, are excellent.
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Stupid Newbie Questions
Baylink
Group: Member
Post Group: Newbie
Posts: 11
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Here's another question: can I preconfigure *where* container backups are put?  So that they can go, frex, directly to slower, larger storage?

Say, a mirrored 3TB pair?
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Stupid Newbie Questions
Baylink
Group: Member
Post Group: Newbie
Posts: 11
Status:
Can I provision storage-only volumes that can be mounted by a started VPS?  This would allow a user, frex, to spin up a copy of a snapshot, upgrade the OS, and test it with data that was *not* part of that volume, useful if the data or code in that mounted partition is big...
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Stupid Newbie Questions
Baylink
Group: Member
Post Group: Newbie
Posts: 11
Status:
One last question for the moment: does the admin UI have a mobile theme, preferably compatible with Opera Android (on both vertical phone screens and horizontal tablet ones)?
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Stupid Newbie Questions
Baylink
Group: Member
Post Group: Newbie
Posts: 11
Status:
Nope: one more.

My iniital reading suggests that V does LVM manipulations to build the volumes for the VMs it creates.

Does it now, or is it planned in the future, for V to know how to manipulate volumes on ZFS or btrfs, instead of LVM?
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Stupid Newbie Questions
manekari
Group: Member
Post Group: Working Member
Posts: 212
Status:
Hello,


Thank you for taking time and writing to us. We will be glad to assist you and answer all your queries.



Quote

KVM seems more flexible on a "what can I run" basis, while OpenVZ seems more flexible from a RAM efficiency basis; I gather I can't run both on the same hardware?


Sir, currently you can not do it with Virtualizor. This feature is under the development but we can not provide you the ETA for this.

Quote

Next: the OS templates for KVM are an order of magnitude larger in size than the OpenVZ templates, and the Xen ones aren't much larger than OpenVZ; say maybe double the size.  Why the large discrepancy?


This depends upon the virtualization package. We cant help it :)

Quote

will OpenStack interact with Virtualizor?


Right now i can't say anything about it, Virtualizor do not interact with OpenStack.


Quote

the Tour says that V supports "VNC and SSH to your VPS".  Does that mean "to the virtualized hardware console of the VPS"?  Cause *that* would be noteworthy, and the only thing I can think of about which they'd actually be bragging.  But the Tour isn't clear.


You can SSH and take the VNC of the guest VMs, also the host VMs. The option is given inside Virtualizor Panel.

Quote

I'll want to be able to see IPv4/v6 In/Out for both each individual VPS *and* the physical interface, *from the Host OS*.


Virtualizor do provide the statistical graph for bandwidth, CPU, RAM resources utilization for host as well as guests. You can find it in Virtualizor Admin Panel.

If you want, you can install other third party tools and use that.


Quote

Can I do that?  Is it set up automatically?  If I want that, and some sort of user CP *inside* a VPS image, I assume I have to rebuild the image template to include that sort of thing?  How hard is it to rebuild the provided image templates for that?


Just create a VPS, install a CP, and create a template of that VPS. You will find Create Template option available in Virtualizor Admin panel. Its just as easy as one click.


Quote


Here's another question: can I preconfigure *where* container backups are put?  So that they can go, frex, directly to slower, larger storage?


Yes, you can set your own directory in Backup settings page.

Quote

Can I provision storage-only volumes that can be mounted by a started VPS?


Currently not supported, We are working on it.

Quote

One last question for the moment: does the admin UI have a mobile theme, preferably compatible with Opera Android.


No.

Quote

Does it now, or is it planned in the future, for V to know how to manipulate volumes on ZFS or btrfs, instead of LVM?


Yes, we will be working on it its in our ToDo list. A cloud based Virtualizor.

Please let me know if you need any further information.



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Stupid Newbie Questions
Baylink
Group: Member
Post Group: Newbie
Posts: 11
Status:
One clarification from that list:

> You can SSH and take the VNC of the guest VMs, also the host VMs. The option is given inside Virtualizor Panel.


I *know* that I can SSH or VNC to *the SSH and VNC servers that are running on the GuestOS inside the VPS; that wasn't what I asked.

Can I SSH or VNC to *the emulated hardware console of the VPS machine*, *in the HostOS*?  That is a *much* more impressive capability, and if that's really what you supply, you should rewrite that stanza of the tour so that's its much clearer that that's what you mean.

(Honestly, your tour smacks very strongly of English as a Second Language, and could use a bit of polish all the way through...)
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Stupid Newbie Questions
Baylink
Group: Member
Post Group: Newbie
Posts: 11
Status:
Oh: and "uses ZFS/btrfs instead of LVM" does not by any means imply "is cloud based"... just so that's clear.
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Stupid Newbie Questions
Baylink
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Post Group: Newbie
Posts: 11
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One other clarifying question:

It's my understanding, from some further research, that I can in fact run an OpenVZ container set *inside a KVM virtual machine* on a host physical machine and OS.

Could I not simply treat the Host as one V server, and the KVM guest with OpenVZ running inside it as *a separately licensed second V server*?

This seems like it would work, unless there's something I don't know about V (and there's a *lot* I don't know about V, obviously. :-)
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Stupid Newbie Questions
manekari
Group: Member
Post Group: Working Member
Posts: 212
Status:
Hello,


Quote

Can I SSH or VNC to *the emulated hardware console of the VPS machine*, *in the HostOS*?


Sir, virtualizor do not install VNC server in the guest node. We use host node simulation.


Quote

Oh: and "uses ZFS/btrfs instead of LVM" does not by any means imply "is cloud based"... just so that's clear.


Yes sir, we are gonna introduce the cloud Virtualizor very soon and the ZFS file-system type is *one of the feature* we are gonna introduce.

Quote

Could I not simply treat the Host as one V server, and the KVM guest with OpenVZ running inside it as *a separately licensed second V server*?


You can sir. You can create a VPS in the KVM and inside the KVM VPS, you can install OpenVZ Virtualizor and treat it as a separate host node with individual Virtualizor license.

Please let us know if you need any further information.
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Stupid Newbie Questions
Baylink
Group: Member
Post Group: Newbie
Posts: 11
Status:
Quote From : manekari January 20, 2014, 5:07 am

Quote

Can I SSH or VNC to *the emulated hardware console of the VPS machine*, *in the HostOS*?


Sir, virtualizor do not install VNC server in the guest node. We use host node simulation.


I *think* that that reply means "Yes, when you connect with SSH or VNC, you are connecting to the emulated hardware console of the Guest VM", which is the answer I wanted to hear.

Quote


Quote

Could I not simply treat the Host as one V server, and the KVM guest with OpenVZ running inside it as *a separately licensed second V server*?


You can sir. You can create a VPS in the KVM and inside the KVM VPS, you can install OpenVZ Virtualizor and treat it as a separate host node with individual Virtualizor license.


Excellent; that's also the answer I wanted to hear.
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Stupid Newbie Questions
Baylink
Group: Member
Post Group: Newbie
Posts: 11
Status:
Well, g'day all.  This project went on hold, and is only just now coming back off hold; I expect to be doing a test install in the next couple weeks, on a spandy new 4x 6-core machine with a stupid amount of RAM.

I know you've got "KVM with OpenVZ" as a standard feature now, as well as mobile control panel interface.  Any other "we can't do that"'s that are now "sure we can"?  :-)

One more question that I realized I have:

Virtualizor is the control panel that lives in a host VM and controls guest VMs, and Softaculous is a control panel that installs into a *userspace* control panel inside a guest VM, and manages LAMPstack packages on that machine/VM.

Do I understand correctly that you folks do not supply a package that lives in that "userspace control panel" space inbetween, akin to cPanel or Plesk; the thing into which Softaculous plugs?
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Stupid Newbie Questions
ZXHost
Group: Member
Post Group: Newbie
Posts: 34
Status:
They do have either

http://www.webuzo.com/

or

http://www.ampps.com/
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Stupid Newbie Questions
alons
Group: Administrator
Post Group: Super Member
Posts: 2280
Status:
Quote
Softaculous is a control panel that installs into a *userspace* control panel inside a guest VM, and manages LAMPstack packages on that machine/VM.


Instead of Softaculous, Webuzo is the product which manages LAMP, LEMP, etc from within the VPS.

@ZXHost, AMPPS is not recommended for production servers but rather is a dev stack



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