Hi, I'm in the process of building a second ovirt cluster within the default DC. This new cluster will use the same storage domains as the original cluster, and I will slowly migrate VMs from the old cluster to the new. Given that the old and new cluster hosts have a firewall between them I need to ensure that all relevant ports are open, with particular attention to the correct operation of SPM. Is it sufficient to open TCP ports 16514 and 54321 to achieve this? Thanks, Alan
This is a multi-part message in MIME format. --------------BF799DFFCDBCAAE2A822457B Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit How do you make the new cluster to use the same storage domain as the original one ? Storage Domains in oVirt are a bit confusing and less flexible and I am not sure it allows it, does it ? On 22/08/2017 12:23, Alan Griffiths wrote:
Hi,
I'm in the process of building a second ovirt cluster within the default DC. This new cluster will use the same storage domains as the original cluster, and I will slowly migrate VMs from the old cluster to the new.
Given that the old and new cluster hosts have a firewall between them I need to ensure that all relevant ports are open, with particular attention to the correct operation of SPM.
Is it sufficient to open TCP ports 16514 and 54321 to achieve this?
Thanks,
Alan
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
--------------BF799DFFCDBCAAE2A822457B Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 7bit <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> </head> <body bgcolor="#FFFFFF" text="#000000"> <p>How do you make the new cluster to use the same storage domain as the original one ? Storage Domains in oVirt are a bit confusing and less flexible and I am not sure it allows it, does it ?<br> </p> <br> <div class="moz-cite-prefix">On 22/08/2017 12:23, Alan Griffiths wrote:<br> </div> <blockquote type="cite" cite="mid:CAKc-zzY_9VqT5iws8n5JfiZTtT5UgWFrLKfD2o1X2DX-iuxg_w@mail.gmail.com"> <div dir="ltr">Hi, <div><br> </div> <div>I'm in the process of building a second ovirt cluster within the default DC. This new cluster will use the same storage domains as the original cluster, and I will slowly migrate VMs from the old cluster to the new.</div> <div><br> </div> <div>Given that the old and new cluster hosts have a firewall between them I need to ensure that all relevant ports are open, with particular attention to the correct operation of SPM.</div> <div><br> </div> <div>Is it sufficient to open TCP ports 16514 and 54321 to achieve this?</div> <div><br> </div> <div>Thanks,</div> <div><br> </div> <div>Alan</div> </div> <br> <fieldset class="mimeAttachmentHeader"></fieldset> <br> <pre wrap="">_______________________________________________ Users mailing list <a class="moz-txt-link-abbreviated" href="mailto:Users@ovirt.org">Users@ovirt.org</a> <a class="moz-txt-link-freetext" href="http://lists.ovirt.org/mailman/listinfo/users">http://lists.ovirt.org/mailman/listinfo/users</a> </pre> </blockquote> <br> </body> </html> --------------BF799DFFCDBCAAE2A822457B--
It's my understanding that when you activate a host part of the process is to verify that it can connect to all active storage domains. If it cannot connect to any domain then it will refuse to go to the "up" state. In my case the storage domains are FC so completely outside the TCP/IP stack. On 22 August 2017 at 16:42, FERNANDO FREDIANI <fernando.frediani@upx.com> wrote:
How do you make the new cluster to use the same storage domain as the original one ? Storage Domains in oVirt are a bit confusing and less flexible and I am not sure it allows it, does it ?
On 22/08/2017 12:23, Alan Griffiths wrote:
Hi,
I'm in the process of building a second ovirt cluster within the default DC. This new cluster will use the same storage domains as the original cluster, and I will slowly migrate VMs from the old cluster to the new.
Given that the old and new cluster hosts have a firewall between them I need to ensure that all relevant ports are open, with particular attention to the correct operation of SPM.
Is it sufficient to open TCP ports 16514 and 54321 to achieve this?
Thanks,
Alan
_______________________________________________ Users mailing listUsers@ovirt.orghttp://lists.ovirt.org/mailman/listinfo/users
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Just found this in the RHV docs. I think sections 2.8 to 2.12 cover everything you could wish to know about SPM process. It made it clear for me anyway. Once SPM is elected then all communication is via the storage domain, no TCP/IP comms required. https://access.redhat.com/documentation/en-us/red_hat_virtualization/4.0/htm... On 22 August 2017 at 16:58, Alan Griffiths <apgriffiths79@gmail.com> wrote:
It's my understanding that when you activate a host part of the process is to verify that it can connect to all active storage domains. If it cannot connect to any domain then it will refuse to go to the "up" state. In my case the storage domains are FC so completely outside the TCP/IP stack.
On 22 August 2017 at 16:42, FERNANDO FREDIANI <fernando.frediani@upx.com> wrote:
How do you make the new cluster to use the same storage domain as the original one ? Storage Domains in oVirt are a bit confusing and less flexible and I am not sure it allows it, does it ?
On 22/08/2017 12:23, Alan Griffiths wrote:
Hi,
I'm in the process of building a second ovirt cluster within the default DC. This new cluster will use the same storage domains as the original cluster, and I will slowly migrate VMs from the old cluster to the new.
Given that the old and new cluster hosts have a firewall between them I need to ensure that all relevant ports are open, with particular attention to the correct operation of SPM.
Is it sufficient to open TCP ports 16514 and 54321 to achieve this?
Thanks,
Alan
_______________________________________________ Users mailing listUsers@ovirt.orghttp://lists.ovirt.org/mailman/listinfo/users
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
On Tue, Aug 22, 2017 at 5:23 PM, Alan Griffiths <apgriffiths79@gmail.com> wrote:
Hi,
I'm in the process of building a second ovirt cluster within the default DC. This new cluster will use the same storage domains as the original cluster, and I will slowly migrate VMs from the old cluster to the new.
Given that the old and new cluster hosts have a firewall between them I need to ensure that all relevant ports are open, with particular attention to the correct operation of SPM.
Is it sufficient to open TCP ports 16514 and 54321 to achieve this?
Thanks,
Alan
One note: when you say: I will slowly migrate VMs from the old cluster to the new. what do you mean exactly with "migrate"? If you mean Live Migraton as described here: https://access.redhat.com/documentation/en-US/Red_Hat_ Enterprise_Virtualization/3.5/html/Administration_Guide/ sect-Migrating_Virtual_Machines_Between_Hosts.html please note that you can live migrate a VM only within the same cluster, not across. You can edit a VM of a datacenter and change the cluster where it have to start, but you have to first shutdown the VM to do so. Probably you already considered this and the related potential downtime for your services. Gianluca
I am planning to live migrate VMs. From my testing this works fine providing cross cluster hosts can talk to each other and they share a common migration network. On 23 August 2017 at 13:54, Gianluca Cecchi <gianluca.cecchi@gmail.com> wrote:
On Tue, Aug 22, 2017 at 5:23 PM, Alan Griffiths <apgriffiths79@gmail.com> wrote:
Hi,
I'm in the process of building a second ovirt cluster within the default DC. This new cluster will use the same storage domains as the original cluster, and I will slowly migrate VMs from the old cluster to the new.
Given that the old and new cluster hosts have a firewall between them I need to ensure that all relevant ports are open, with particular attention to the correct operation of SPM.
Is it sufficient to open TCP ports 16514 and 54321 to achieve this?
Thanks,
Alan
One note:
when you say: I will slowly migrate VMs from the old cluster to the new.
what do you mean exactly with "migrate"? If you mean Live Migraton as described here: https://access.redhat.com/documentation/en-US/Red_Hat_Enterp rise_Virtualization/3.5/html/Administration_Guide/sect- Migrating_Virtual_Machines_Between_Hosts.html
please note that you can live migrate a VM only within the same cluster, not across.
You can edit a VM of a datacenter and change the cluster where it have to start, but you have to first shutdown the VM to do so. Probably you already considered this and the related potential downtime for your services.
Gianluca
participants (3)
-
Alan Griffiths -
FERNANDO FREDIANI -
Gianluca Cecchi