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Posted to dev@cloudstack.apache.org by Mike Tutkowski <mi...@solidfire.com> on 2013/07/18 03:47:29 UTC
Quick Secondary Storage Question
Hi,
I was wondering, if I am using two hypervisors (in my case, XenServer and
ESXi), do I need to have the system template installed for both hypervisor
types or will CloudStack function fine with having just one or the other?
I ask because I actually have a config with XenServer and VMware, but only
have the XenServer system template on secondary storage because the VMware
one was not working for me (some kind of a SOAP error when it was trying to
deploy the template).
I seem to be having trouble with system VMs not getting restarted, so I'm
thinking it's because I don't have the VMware template on secondary storage.
Thanks!
--
*Mike Tutkowski*
*Senior CloudStack Developer, SolidFire Inc.*
e: mike.tutkowski@solidfire.com
o: 303.746.7302
Advancing the way the world uses the
cloud<http://solidfire.com/solution/overview/?video=play>
*™*
RE: Quick Secondary Storage Question
Posted by Donal Lafferty <do...@citrix.com>.
tl;dr - your network config may result in a need for system VMs on both Xen and VMWare clusters.
Long form:
System VMs provide services that are not feasible to deploy alongside the CloudStack management server.
Currently, there are three kinds: secondary storage management services (aka SSVM), network services (aka virtual router), console services (aka console VM).
Sanjeev makes the point that SSVM can provide zone-wide secondary storage management services. This SSVM has a light load, because it only setups up and manages images such as templates. The hypervisors access secondary storage directly when downloading images.
In contrast, the virtual router's load and locality requirements may force CloudStack to create multiple instances. IIRC, this occurs when the virtual routers take on packet routing tasks as opposed to higher level services. IIRC, security groups are enforced by an on the hypervisor virtual router.
If someone could comment on console VMs that would be great. Likewise, I would be interested to know if DHCP is zone wide or local to a hypervisor.
> -----Original Message-----
> From: Mike Tutkowski [mailto:mike.tutkowski@solidfire.com]
> Sent: 18 July 2013 7:21 AM
> To: dev@cloudstack.apache.org
> Subject: Re: Quick Secondary Storage Question
>
> Thanks for your reply, Sanjeev!
>
> I was curious what the answer to that was (even though I realized after I sent
> my e-mail why my system VMs weren't restarting and that it had nothing, as
> you noted, to do with only having the XenServer system template).
>
> Thanks again!
>
>
> On Thu, Jul 18, 2013 at 12:12 AM, Sanjeev Neelarapu <
> sanjeev.neelarapu@citrix.com> wrote:
>
> > Hi,
> >
> > If both the hypervisors are in the same zone , then you don't need to
> > have the system templates installed for both hypervisor types. One
> > system template should be fine.
> >
> > Thanks,
> > Sanjeev
> >
> > -----Original Message-----
> > From: Mike Tutkowski [mailto:mike.tutkowski@solidfire.com]
> > Sent: Thursday, July 18, 2013 7:17 AM
> > To: dev@cloudstack.apache.org
> > Subject: Quick Secondary Storage Question
> >
> > Hi,
> >
> > I was wondering, if I am using two hypervisors (in my case, XenServer
> > and ESXi), do I need to have the system template installed for both
> > hypervisor types or will CloudStack function fine with having just one or the
> other?
> >
> > I ask because I actually have a config with XenServer and VMware, but
> > only have the XenServer system template on secondary storage because
> > the VMware one was not working for me (some kind of a SOAP error when
> > it was trying to deploy the template).
> >
> > I seem to be having trouble with system VMs not getting restarted, so
> > I'm thinking it's because I don't have the VMware template on secondary
> storage.
> >
> > Thanks!
> >
> > --
> > *Mike Tutkowski*
> > *Senior CloudStack Developer, SolidFire Inc.*
> > e: mike.tutkowski@solidfire.com
> > o: 303.746.7302
> > Advancing the way the world uses the
> > cloud<http://solidfire.com/solution/overview/?video=play>
> > *(tm)*
> >
>
>
>
> --
> *Mike Tutkowski*
> *Senior CloudStack Developer, SolidFire Inc.*
> e: mike.tutkowski@solidfire.com
> o: 303.746.7302
> Advancing the way the world uses the
> cloud<http://solidfire.com/solution/overview/?video=play>
> *(tm)*
Re: Quick Secondary Storage Question
Posted by Mike Tutkowski <mi...@solidfire.com>.
Thanks for your reply, Sanjeev!
I was curious what the answer to that was (even though I realized after I
sent my e-mail why my system VMs weren't restarting and that it had
nothing, as you noted, to do with only having the XenServer system
template).
Thanks again!
On Thu, Jul 18, 2013 at 12:12 AM, Sanjeev Neelarapu <
sanjeev.neelarapu@citrix.com> wrote:
> Hi,
>
> If both the hypervisors are in the same zone , then you don't need to have
> the system templates installed for both hypervisor types. One system
> template should be fine.
>
> Thanks,
> Sanjeev
>
> -----Original Message-----
> From: Mike Tutkowski [mailto:mike.tutkowski@solidfire.com]
> Sent: Thursday, July 18, 2013 7:17 AM
> To: dev@cloudstack.apache.org
> Subject: Quick Secondary Storage Question
>
> Hi,
>
> I was wondering, if I am using two hypervisors (in my case, XenServer and
> ESXi), do I need to have the system template installed for both hypervisor
> types or will CloudStack function fine with having just one or the other?
>
> I ask because I actually have a config with XenServer and VMware, but only
> have the XenServer system template on secondary storage because the VMware
> one was not working for me (some kind of a SOAP error when it was trying to
> deploy the template).
>
> I seem to be having trouble with system VMs not getting restarted, so I'm
> thinking it's because I don't have the VMware template on secondary storage.
>
> Thanks!
>
> --
> *Mike Tutkowski*
> *Senior CloudStack Developer, SolidFire Inc.*
> e: mike.tutkowski@solidfire.com
> o: 303.746.7302
> Advancing the way the world uses the
> cloud<http://solidfire.com/solution/overview/?video=play>
> *(tm)*
>
--
*Mike Tutkowski*
*Senior CloudStack Developer, SolidFire Inc.*
e: mike.tutkowski@solidfire.com
o: 303.746.7302
Advancing the way the world uses the
cloud<http://solidfire.com/solution/overview/?video=play>
*™*
RE: Quick Secondary Storage Question
Posted by Sanjeev Neelarapu <sa...@citrix.com>.
Hi,
If both the hypervisors are in the same zone , then you don't need to have the system templates installed for both hypervisor types. One system template should be fine.
Thanks,
Sanjeev
-----Original Message-----
From: Mike Tutkowski [mailto:mike.tutkowski@solidfire.com]
Sent: Thursday, July 18, 2013 7:17 AM
To: dev@cloudstack.apache.org
Subject: Quick Secondary Storage Question
Hi,
I was wondering, if I am using two hypervisors (in my case, XenServer and ESXi), do I need to have the system template installed for both hypervisor types or will CloudStack function fine with having just one or the other?
I ask because I actually have a config with XenServer and VMware, but only have the XenServer system template on secondary storage because the VMware one was not working for me (some kind of a SOAP error when it was trying to deploy the template).
I seem to be having trouble with system VMs not getting restarted, so I'm thinking it's because I don't have the VMware template on secondary storage.
Thanks!
--
*Mike Tutkowski*
*Senior CloudStack Developer, SolidFire Inc.*
e: mike.tutkowski@solidfire.com
o: 303.746.7302
Advancing the way the world uses the
cloud<http://solidfire.com/solution/overview/?video=play>
*(tm)*