Re: [ovirt-users] change network MTU settings without taking all the VMs down?
I wound up manually changing the network configs on my hosts during other updates, one at a time. Then I migrated off the lower MTU host and repeated. Seemed to be minor extra bit of pause after migration completed, then things were fine (and I manually updated MTU settings on the VMs at that time, without rebooting/shutdowns). I did have to reboot one VM that went to 100% cpu and didn’t recover, but it has done that before and I think it’s a different problem with that one in particular, not the process. Then I repeated on the other host. Both though the networks in question were not synchronized, but came up fine away. Once that was all done, I updated the MTU values via the database, and now ovirt thinks everything is happy. So the manaul process Loir describes for 3.4 works, and works for 3.5 if you manage it properly. I’m still set with my vdmds forced to ifcfg persistence due to troubles with bonded interfaces in 3.5, so this was easy for me. -Darrell > On Jan 28, 2015, at 11:37 AM, Donny Davis wrote: > > So adding a new network was the way you went??On Jan 28, 2015 9:22 AM, > Darrell Budic wrote: >> >> 3.5.1. It’s really a “clean and tidy” thing now that I’ve got the network >> cleaned up, so not urgent but nice to have. Thanks for the info! >> >>> On Jan 28, 2015, at 4:05 AM, Dan Kenigsberg wrote: >>> >>> On Wed, Jan 28, 2015 at 11:03:14AM +0200, Lior Vernia wrote: Hi Darrell! There's currently no clean way to do this - we'll be looking to fix this in 3.6 (https://bugzilla.redhat.com/show_bug.cgi?id=1055454). You haven't mentioned which version of oVirt you're running - if it's 3.4 or lower, I think it would suffice to change ifcfg files on your hypervisors and restart the network service. The network will then appear as out-of-sync in the GUI, but should be fully functional with MTU 1500. You'd also want the network configuration to be saved in case of future rollbacks - Dan, how would that be done? >>> >>> up to 3.4, nothing else should be done (assuming the network config was >>> already declared "safe" and survived reboot). ifcfg is the only persistent >>> copy. >>> If you're running 3.5, I think you need to run some vdsm shell commands on the hypervisor as we've added an abstraction layer for configuration persistence above ifcfg files - again I'll ask Dan to chime in. >>> >>> In 3.5 we've added a Vdsm-side persistent copy of the network, >>> which sits under /var/lib/vdsm/netconf/nets. You should edit the json >>> definitions therein in order to ensure proper network startup after >>> boot. >>> As for getting the engine network configuration to MTU 1500 (for future hypervisor configuration and for networks to not appear as out-of-sync on existing ones) without taking down all the VMs (or hot-unplugging NICs) at one point - I don't think there's currently a way other than hacking the DB... Just leaving the network out-of-sync on the hosts could result in inconveniences later on when configuring host networking. Is it worth the trouble of getting MTU 1500 instead of 1448? I presume the difference in performance would be negligible. Or are you experiencing incoming frames being dropped due to having 1500 bytes instead of 1448?... Either way, as you mentioned taking down the VMs can be a last resort, or wait for 3.6 where it should be simpler :) Yours, Lior. On 27/01/15 19:43, Darrell Budic wrote: > I finally got a couple of networks our from behind a wan based layer 2 > bridge that required me to run at MTU 1448, and would like to get back up > to MTU 1500. I see the GUI won’t let me do that while the network is in > use. Any way around this, clean or otherwise? Restarting VMs to update > them is ok, just trying to avoid having to take everything down at the > same time. > > -Darrell > ___ > Users mailing list > Users@ovirt.org > http://lists.ovirt.org/mailman/listinfo/users > >> >> ___ >> Users mailing list >> Users@ovirt.org >> http://lists.ovirt.org/mailman/listinfo/users ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] change network MTU settings without taking all the VMs down?
So adding a new network was the way you went??On Jan 28, 2015 9:22 AM, Darrell Budic wrote: > > 3.5.1. It’s really a “clean and tidy” thing now that I’ve got the network > cleaned up, so not urgent but nice to have. Thanks for the info! > > > On Jan 28, 2015, at 4:05 AM, Dan Kenigsberg wrote: > > > > On Wed, Jan 28, 2015 at 11:03:14AM +0200, Lior Vernia wrote: > >> Hi Darrell! > >> > >> There's currently no clean way to do this - we'll be looking to fix this > >> in 3.6 (https://bugzilla.redhat.com/show_bug.cgi?id=1055454). > >> > >> You haven't mentioned which version of oVirt you're running - if it's > >> 3.4 or lower, I think it would suffice to change ifcfg files on your > >> hypervisors and restart the network service. The network will then > >> appear as out-of-sync in the GUI, but should be fully functional with > >> MTU 1500. You'd also want the network configuration to be saved in case > >> of future rollbacks - Dan, how would that be done? > > > > up to 3.4, nothing else should be done (assuming the network config was > > already declared "safe" and survived reboot). ifcfg is the only persistent > > copy. > > > >> > >> If you're running 3.5, I think you need to run some vdsm shell commands > >> on the hypervisor as we've added an abstraction layer for configuration > >> persistence above ifcfg files - again I'll ask Dan to chime in. > > > > In 3.5 we've added a Vdsm-side persistent copy of the network, > > which sits under /var/lib/vdsm/netconf/nets. You should edit the json > > definitions therein in order to ensure proper network startup after > > boot. > > > >> > >> As for getting the engine network configuration to MTU 1500 (for future > >> hypervisor configuration and for networks to not appear as out-of-sync > >> on existing ones) without taking down all the VMs (or hot-unplugging > >> NICs) at one point - I don't think there's currently a way other than > >> hacking the DB... Just leaving the network out-of-sync on the hosts > >> could result in inconveniences later on when configuring host networking. > >> > >> Is it worth the trouble of getting MTU 1500 instead of 1448? I presume > >> the difference in performance would be negligible. Or are you > >> experiencing incoming frames being dropped due to having 1500 bytes > >> instead of 1448?... Either way, as you mentioned taking down the VMs can > >> be a last resort, or wait for 3.6 where it should be simpler :) > >> > >> Yours, Lior. > >> > >> On 27/01/15 19:43, Darrell Budic wrote: > >>> I finally got a couple of networks our from behind a wan based layer 2 > >>> bridge that required me to run at MTU 1448, and would like to get back up > >>> to MTU 1500. I see the GUI won’t let me do that while the network is in > >>> use. Any way around this, clean or otherwise? Restarting VMs to update > >>> them is ok, just trying to avoid having to take everything down at the > >>> same time. > >>> > >>> -Darrell > >>> ___ > >>> Users mailing list > >>> Users@ovirt.org > >>> http://lists.ovirt.org/mailman/listinfo/users > >>> > > ___ > Users mailing list > Users@ovirt.org > http://lists.ovirt.org/mailman/listinfo/users ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] change network MTU settings without taking all the VMs down?
3.5.1. It’s really a “clean and tidy” thing now that I’ve got the network cleaned up, so not urgent but nice to have. Thanks for the info! > On Jan 28, 2015, at 4:05 AM, Dan Kenigsberg wrote: > > On Wed, Jan 28, 2015 at 11:03:14AM +0200, Lior Vernia wrote: >> Hi Darrell! >> >> There's currently no clean way to do this - we'll be looking to fix this >> in 3.6 (https://bugzilla.redhat.com/show_bug.cgi?id=1055454). >> >> You haven't mentioned which version of oVirt you're running - if it's >> 3.4 or lower, I think it would suffice to change ifcfg files on your >> hypervisors and restart the network service. The network will then >> appear as out-of-sync in the GUI, but should be fully functional with >> MTU 1500. You'd also want the network configuration to be saved in case >> of future rollbacks - Dan, how would that be done? > > up to 3.4, nothing else should be done (assuming the network config was > already declared "safe" and survived reboot). ifcfg is the only persistent > copy. > >> >> If you're running 3.5, I think you need to run some vdsm shell commands >> on the hypervisor as we've added an abstraction layer for configuration >> persistence above ifcfg files - again I'll ask Dan to chime in. > > In 3.5 we've added a Vdsm-side persistent copy of the network, > which sits under /var/lib/vdsm/netconf/nets. You should edit the json > definitions therein in order to ensure proper network startup after > boot. > >> >> As for getting the engine network configuration to MTU 1500 (for future >> hypervisor configuration and for networks to not appear as out-of-sync >> on existing ones) without taking down all the VMs (or hot-unplugging >> NICs) at one point - I don't think there's currently a way other than >> hacking the DB... Just leaving the network out-of-sync on the hosts >> could result in inconveniences later on when configuring host networking. >> >> Is it worth the trouble of getting MTU 1500 instead of 1448? I presume >> the difference in performance would be negligible. Or are you >> experiencing incoming frames being dropped due to having 1500 bytes >> instead of 1448?... Either way, as you mentioned taking down the VMs can >> be a last resort, or wait for 3.6 where it should be simpler :) >> >> Yours, Lior. >> >> On 27/01/15 19:43, Darrell Budic wrote: >>> I finally got a couple of networks our from behind a wan based layer 2 >>> bridge that required me to run at MTU 1448, and would like to get back up >>> to MTU 1500. I see the GUI won’t let me do that while the network is in >>> use. Any way around this, clean or otherwise? Restarting VMs to update them >>> is ok, just trying to avoid having to take everything down at the same time. >>> >>> -Darrell >>> ___ >>> Users mailing list >>> Users@ovirt.org >>> http://lists.ovirt.org/mailman/listinfo/users >>> ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] change network MTU settings without taking all the VMs down?
Hi Darell, you could switch the vNICs to different/empty network for a while. Or if possible you can just shut down the VMs that should do the trick as well. HTH Martin Pavlik RHEV QE > On 27 Jan 2015, at 21:59, Donny Davis wrote: > > I'm on the same.. And I see the issue. Why don't you create a new network > with the correct parameters and then move the network the VM is attached to > > On Jan 27, 2015 1:39 PM, Darrell Budic wrote: >> >> Try changing that custom MTU and hitting OK. I get: >> >> on 3.5 and 3.5.1. What version are you running? >> >>> On Jan 27, 2015, at 2:04 PM, Donny Davis wrote: >>> >>> Maybe I missed your question, but I can change the MTU from the gui without >>> any problems. As long as you make sure there are not any vm's on the host >>> you are trying to sync, I have experienced no issues. >>> >>> Donny >>> >>> -Original Message- >>> From: Darrell Budic [mailto:bu...@onholyground.com] >>> Sent: Tuesday, January 27, 2015 12:30 PM >>> To: Donny Davis >>> Cc: users@ovirt.org >>> Subject: Re: [ovirt-users] change network MTU settings without taking all >>> the VMs down? >>> >>> Except you can’t change the network MTU setting in the first place on the >>> network in the GUI. I’ve thought about doing it in the database, with a >>> migration as you mention. Just checking first for better options :) >>> >>> >>>> On Jan 27, 2015, at 12:08 PM, Donny Davis wrote: >>>> >>>> Migrate the vms between hosts, and when a host gets to no running VMS you >>>> can sync that network. >>>> >>>> Donny D >>>> cloudspin.meOn Jan 27, 2015 10:43 AM, Darrell Budic >>>> wrote: >>>>> >>>>> >>>>> I finally got a couple of networks our from behind a wan based layer 2 >>>>> bridge that required me to run at MTU 1448, and would like to get back up >>>>> to MTU 1500. I see the GUI won’t let me do that while the network is in >>>>> use. Any way around this, clean or otherwise? Restarting VMs to update >>>>> them is ok, just trying to avoid having to take everything down at the >>>>> same time. >>>>> >>>>> -Darrell >>>>> ___ >>>>> Users mailing list >>>>> Users@ovirt.org >>>>> http://lists.ovirt.org/mailman/listinfo/users >>> >>> >>> >> >> > ___ > Users mailing list > Users@ovirt.org > http://lists.ovirt.org/mailman/listinfo/users ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] change network MTU settings without taking all the VMs down?
On Wed, Jan 28, 2015 at 11:03:14AM +0200, Lior Vernia wrote: > Hi Darrell! > > There's currently no clean way to do this - we'll be looking to fix this > in 3.6 (https://bugzilla.redhat.com/show_bug.cgi?id=1055454). > > You haven't mentioned which version of oVirt you're running - if it's > 3.4 or lower, I think it would suffice to change ifcfg files on your > hypervisors and restart the network service. The network will then > appear as out-of-sync in the GUI, but should be fully functional with > MTU 1500. You'd also want the network configuration to be saved in case > of future rollbacks - Dan, how would that be done? up to 3.4, nothing else should be done (assuming the network config was already declared "safe" and survived reboot). ifcfg is the only persistent copy. > > If you're running 3.5, I think you need to run some vdsm shell commands > on the hypervisor as we've added an abstraction layer for configuration > persistence above ifcfg files - again I'll ask Dan to chime in. In 3.5 we've added a Vdsm-side persistent copy of the network, which sits under /var/lib/vdsm/netconf/nets. You should edit the json definitions therein in order to ensure proper network startup after boot. > > As for getting the engine network configuration to MTU 1500 (for future > hypervisor configuration and for networks to not appear as out-of-sync > on existing ones) without taking down all the VMs (or hot-unplugging > NICs) at one point - I don't think there's currently a way other than > hacking the DB... Just leaving the network out-of-sync on the hosts > could result in inconveniences later on when configuring host networking. > > Is it worth the trouble of getting MTU 1500 instead of 1448? I presume > the difference in performance would be negligible. Or are you > experiencing incoming frames being dropped due to having 1500 bytes > instead of 1448?... Either way, as you mentioned taking down the VMs can > be a last resort, or wait for 3.6 where it should be simpler :) > > Yours, Lior. > > On 27/01/15 19:43, Darrell Budic wrote: > > I finally got a couple of networks our from behind a wan based layer 2 > > bridge that required me to run at MTU 1448, and would like to get back up > > to MTU 1500. I see the GUI won’t let me do that while the network is in > > use. Any way around this, clean or otherwise? Restarting VMs to update them > > is ok, just trying to avoid having to take everything down at the same time. > > > > -Darrell > > ___ > > Users mailing list > > Users@ovirt.org > > http://lists.ovirt.org/mailman/listinfo/users > > ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] change network MTU settings without taking all the VMs down?
Hi Darrell! There's currently no clean way to do this - we'll be looking to fix this in 3.6 (https://bugzilla.redhat.com/show_bug.cgi?id=1055454). You haven't mentioned which version of oVirt you're running - if it's 3.4 or lower, I think it would suffice to change ifcfg files on your hypervisors and restart the network service. The network will then appear as out-of-sync in the GUI, but should be fully functional with MTU 1500. You'd also want the network configuration to be saved in case of future rollbacks - Dan, how would that be done? If you're running 3.5, I think you need to run some vdsm shell commands on the hypervisor as we've added an abstraction layer for configuration persistence above ifcfg files - again I'll ask Dan to chime in. As for getting the engine network configuration to MTU 1500 (for future hypervisor configuration and for networks to not appear as out-of-sync on existing ones) without taking down all the VMs (or hot-unplugging NICs) at one point - I don't think there's currently a way other than hacking the DB... Just leaving the network out-of-sync on the hosts could result in inconveniences later on when configuring host networking. Is it worth the trouble of getting MTU 1500 instead of 1448? I presume the difference in performance would be negligible. Or are you experiencing incoming frames being dropped due to having 1500 bytes instead of 1448?... Either way, as you mentioned taking down the VMs can be a last resort, or wait for 3.6 where it should be simpler :) Yours, Lior. On 27/01/15 19:43, Darrell Budic wrote: > I finally got a couple of networks our from behind a wan based layer 2 bridge > that required me to run at MTU 1448, and would like to get back up to MTU > 1500. I see the GUI won’t let me do that while the network is in use. Any way > around this, clean or otherwise? Restarting VMs to update them is ok, just > trying to avoid having to take everything down at the same time. > > -Darrell > ___ > Users mailing list > Users@ovirt.org > http://lists.ovirt.org/mailman/listinfo/users > ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] change network MTU settings without taking all the VMs down?
Please let us know how it works out, it may be helpful to someone in the future Cheers Donny DOn Jan 27, 2015 2:45 PM, Darrell Budic wrote: > > Ah, good idea. That will be cleaner than the hack I was considering, I’ll see > if I can work that somehow. Thanks! > > > On Jan 27, 2015, at 2:59 PM, Donny Davis wrote: > > > > I'm on the same.. And I see the issue. Why don't you create a new network > > with the correct parameters and then move the network the VM is attached to > > > > On Jan 27, 2015 1:39 PM, Darrell Budic wrote: > >> > >> Try changing that custom MTU and hitting OK. I get: > >> > >> on 3.5 and 3.5.1. What version are you running? > >> > >>> On Jan 27, 2015, at 2:04 PM, Donny Davis wrote: > >>> > >>> Maybe I missed your question, but I can change the MTU from the gui > >>> without any problems. As long as you make sure there are not any vm's on > >>> the host you are trying to sync, I have experienced no issues. > >>> > >>> Donny > >>> > >>> -----Original Message- > >>> From: Darrell Budic [mailto:bu...@onholyground.com] > >>> Sent: Tuesday, January 27, 2015 12:30 PM > >>> To: Donny Davis > >>> Cc: users@ovirt.org > >>> Subject: Re: [ovirt-users] change network MTU settings without taking all > >>> the VMs down? > >>> > >>> Except you can’t change the network MTU setting in the first place on the > >>> network in the GUI. I’ve thought about doing it in the database, with a > >>> migration as you mention. Just checking first for better options :) > >>> > >>> > >>>> On Jan 27, 2015, at 12:08 PM, Donny Davis wrote: > >>>> > >>>> Migrate the vms between hosts, and when a host gets to no running VMS > >>>> you can sync that network. > >>>> > >>>> Donny D > >>>> cloudspin.meOn Jan 27, 2015 10:43 AM, Darrell Budic > >>>> wrote: > >>>>> > >>>>> > >>>>> I finally got a couple of networks our from behind a wan based layer 2 > >>>>> bridge that required me to run at MTU 1448, and would like to get back > >>>>> up to MTU 1500. I see the GUI won’t let me do that while the network is > >>>>> in use. Any way around this, clean or otherwise? Restarting VMs to > >>>>> update them is ok, just trying to avoid having to take everything down > >>>>> at the same time. > >>>>> > >>>>> -Darrell > >>>>> ___ > >>>>> Users mailing list > >>>>> Users@ovirt.org > >>>>> http://lists.ovirt.org/mailman/listinfo/users > >>> > >>> > >>> > >> > >> > ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] change network MTU settings without taking all the VMs down?
Ah, good idea. That will be cleaner than the hack I was considering, I’ll see if I can work that somehow. Thanks! > On Jan 27, 2015, at 2:59 PM, Donny Davis wrote: > > I'm on the same.. And I see the issue. Why don't you create a new network > with the correct parameters and then move the network the VM is attached to > > On Jan 27, 2015 1:39 PM, Darrell Budic wrote: >> >> Try changing that custom MTU and hitting OK. I get: >> >> on 3.5 and 3.5.1. What version are you running? >> >>> On Jan 27, 2015, at 2:04 PM, Donny Davis wrote: >>> >>> Maybe I missed your question, but I can change the MTU from the gui without >>> any problems. As long as you make sure there are not any vm's on the host >>> you are trying to sync, I have experienced no issues. >>> >>> Donny >>> >>> -Original Message- >>> From: Darrell Budic [mailto:bu...@onholyground.com] >>> Sent: Tuesday, January 27, 2015 12:30 PM >>> To: Donny Davis >>> Cc: users@ovirt.org >>> Subject: Re: [ovirt-users] change network MTU settings without taking all >>> the VMs down? >>> >>> Except you can’t change the network MTU setting in the first place on the >>> network in the GUI. I’ve thought about doing it in the database, with a >>> migration as you mention. Just checking first for better options :) >>> >>> >>>> On Jan 27, 2015, at 12:08 PM, Donny Davis wrote: >>>> >>>> Migrate the vms between hosts, and when a host gets to no running VMS you >>>> can sync that network. >>>> >>>> Donny D >>>> cloudspin.meOn Jan 27, 2015 10:43 AM, Darrell Budic >>>> wrote: >>>>> >>>>> >>>>> I finally got a couple of networks our from behind a wan based layer 2 >>>>> bridge that required me to run at MTU 1448, and would like to get back up >>>>> to MTU 1500. I see the GUI won’t let me do that while the network is in >>>>> use. Any way around this, clean or otherwise? Restarting VMs to update >>>>> them is ok, just trying to avoid having to take everything down at the >>>>> same time. >>>>> >>>>> -Darrell >>>>> ___ >>>>> Users mailing list >>>>> Users@ovirt.org >>>>> http://lists.ovirt.org/mailman/listinfo/users >>> >>> >>> >> >> ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] change network MTU settings without taking all the VMs down?
I'm on the same.. And I see the issue. Why don't you create a new network with the correct parameters and then move the network the VM is attached to On Jan 27, 2015 1:39 PM, Darrell Budic wrote: > > Try changing that custom MTU and hitting OK. I get: > > on 3.5 and 3.5.1. What version are you running? > >> On Jan 27, 2015, at 2:04 PM, Donny Davis wrote: >> >> Maybe I missed your question, but I can change the MTU from the gui without >> any problems. As long as you make sure there are not any vm's on the host >> you are trying to sync, I have experienced no issues. >> >> Donny >> >> -Original Message- >> From: Darrell Budic [mailto:bu...@onholyground.com] >> Sent: Tuesday, January 27, 2015 12:30 PM >> To: Donny Davis >> Cc: users@ovirt.org >> Subject: Re: [ovirt-users] change network MTU settings without taking all >> the VMs down? >> >> Except you can’t change the network MTU setting in the first place on the >> network in the GUI. I’ve thought about doing it in the database, with a >> migration as you mention. Just checking first for better options :) >> >> >>> On Jan 27, 2015, at 12:08 PM, Donny Davis wrote: >>> >>> Migrate the vms between hosts, and when a host gets to no running VMS you >>> can sync that network. >>> >>> Donny D >>> cloudspin.meOn Jan 27, 2015 10:43 AM, Darrell Budic >>> wrote: >>>> >>>> >>>> I finally got a couple of networks our from behind a wan based layer 2 >>>> bridge that required me to run at MTU 1448, and would like to get back up >>>> to MTU 1500. I see the GUI won’t let me do that while the network is in >>>> use. Any way around this, clean or otherwise? Restarting VMs to update >>>> them is ok, just trying to avoid having to take everything down at the >>>> same time. >>>> >>>> -Darrell >>>> ___ >>>> Users mailing list >>>> Users@ovirt.org >>>> http://lists.ovirt.org/mailman/listinfo/users >> >> >> > > ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] change network MTU settings without taking all the VMs down?
Try changing that custom MTU and hitting OK. I get: on 3.5 and 3.5.1. What version are you running? > On Jan 27, 2015, at 2:04 PM, Donny Davis wrote: > > Maybe I missed your question, but I can change the MTU from the gui without > any problems. As long as you make sure there are not any vm's on the host you > are trying to sync, I have experienced no issues. > > Donny > > -Original Message- > From: Darrell Budic [mailto:bu...@onholyground.com] > Sent: Tuesday, January 27, 2015 12:30 PM > To: Donny Davis > Cc: users@ovirt.org > Subject: Re: [ovirt-users] change network MTU settings without taking all the > VMs down? > > Except you can’t change the network MTU setting in the first place on the > network in the GUI. I’ve thought about doing it in the database, with a > migration as you mention. Just checking first for better options :) > > >> On Jan 27, 2015, at 12:08 PM, Donny Davis wrote: >> >> Migrate the vms between hosts, and when a host gets to no running VMS you >> can sync that network. >> >> Donny D >> cloudspin.meOn Jan 27, 2015 10:43 AM, Darrell Budic >> wrote: >>> >>> I finally got a couple of networks our from behind a wan based layer 2 >>> bridge that required me to run at MTU 1448, and would like to get back up >>> to MTU 1500. I see the GUI won’t let me do that while the network is in >>> use. Any way around this, clean or otherwise? Restarting VMs to update them >>> is ok, just trying to avoid having to take everything down at the same time. >>> >>> -Darrell >>> ___ >>> Users mailing list >>> Users@ovirt.org >>> http://lists.ovirt.org/mailman/listinfo/users > > ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] change network MTU settings without taking all the VMs down?
Maybe I missed your question, but I can change the MTU from the gui without any problems. As long as you make sure there are not any vm's on the host you are trying to sync, I have experienced no issues. Donny -Original Message- From: Darrell Budic [mailto:bu...@onholyground.com] Sent: Tuesday, January 27, 2015 12:30 PM To: Donny Davis Cc: users@ovirt.org Subject: Re: [ovirt-users] change network MTU settings without taking all the VMs down? Except you can’t change the network MTU setting in the first place on the network in the GUI. I’ve thought about doing it in the database, with a migration as you mention. Just checking first for better options :) > On Jan 27, 2015, at 12:08 PM, Donny Davis wrote: > > Migrate the vms between hosts, and when a host gets to no running VMS you can > sync that network. > > Donny D > cloudspin.meOn Jan 27, 2015 10:43 AM, Darrell Budic > wrote: >> >> I finally got a couple of networks our from behind a wan based layer 2 >> bridge that required me to run at MTU 1448, and would like to get back up to >> MTU 1500. I see the GUI won’t let me do that while the network is in use. >> Any way around this, clean or otherwise? Restarting VMs to update them is >> ok, just trying to avoid having to take everything down at the same time. >> >> -Darrell >> ___ >> Users mailing list >> Users@ovirt.org >> http://lists.ovirt.org/mailman/listinfo/users ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] change network MTU settings without taking all the VMs down?
Except you can’t change the network MTU setting in the first place on the network in the GUI. I’ve thought about doing it in the database, with a migration as you mention. Just checking first for better options :) > On Jan 27, 2015, at 12:08 PM, Donny Davis wrote: > > Migrate the vms between hosts, and when a host gets to no running VMS you can > sync that network. > > Donny D > cloudspin.meOn Jan 27, 2015 10:43 AM, Darrell Budic > wrote: >> >> I finally got a couple of networks our from behind a wan based layer 2 >> bridge that required me to run at MTU 1448, and would like to get back up to >> MTU 1500. I see the GUI won’t let me do that while the network is in use. >> Any way around this, clean or otherwise? Restarting VMs to update them is >> ok, just trying to avoid having to take everything down at the same time. >> >> -Darrell >> ___ >> Users mailing list >> Users@ovirt.org >> http://lists.ovirt.org/mailman/listinfo/users ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] change network MTU settings without taking all the VMs down?
Migrate the vms between hosts, and when a host gets to no running VMS you can sync that network. Donny D cloudspin.meOn Jan 27, 2015 10:43 AM, Darrell Budic wrote: > > I finally got a couple of networks our from behind a wan based layer 2 bridge > that required me to run at MTU 1448, and would like to get back up to MTU > 1500. I see the GUI won’t let me do that while the network is in use. Any way > around this, clean or otherwise? Restarting VMs to update them is ok, just > trying to avoid having to take everything down at the same time. > > -Darrell > ___ > Users mailing list > Users@ovirt.org > http://lists.ovirt.org/mailman/listinfo/users ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
[ovirt-users] change network MTU settings without taking all the VMs down?
I finally got a couple of networks our from behind a wan based layer 2 bridge that required me to run at MTU 1448, and would like to get back up to MTU 1500. I see the GUI won’t let me do that while the network is in use. Any way around this, clean or otherwise? Restarting VMs to update them is ok, just trying to avoid having to take everything down at the same time. -Darrell ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
