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[Openstack] live_migration only using 8 Mb speed


On 18-08-23 14:33:44, Satish Patel wrote:
> Matt,
> 
> I am going to override following in user_variable.yml file in that
> case do i need to run ./bootstrap-ansible.sh script?
> 
> ## Nova service
> nova_git_repo: https://git.openstack.org/openstack/nova
> nova_git_install_branch: a9c9285a5a68ab89a6543d143c364d90a01cd51c #
> HEAD of "stable/queens" as of 06.08.2018
> nova_git_project_group: nova_all
> 
> 
> 
> On Thu, Aug 23, 2018 at 7:18 AM, Satish Patel <satish.txt at gmail.com> wrote:
> > I'm testing this in lab, no load yet
> >
> > Sent from my iPhone
> >
> >> On Aug 23, 2018, at 2:30 AM, Matthew Thode <prometheanfire at gentoo.org> wrote:
> >>
> >>> On 18-08-22 23:04:57, Satish Patel wrote:
> >>> Mathew,
> >>>
> >>> I haven't applied any patch yet but i am noticing in cluster some host
> >>> migrating VM super fast and some host migrating very slow. Is this
> >>> known behavior?
> >>>
> >>> On Wed, Aug 22, 2018 at 11:28 AM, Matthew Thode
> >>> <prometheanfire at gentoo.org> wrote:
> >>>> On 18-08-22 10:58:48, Satish Patel wrote:
> >>>>> Matthew,
> >>>>>
> >>>>> I have two option looks like, correct me if i am wrong.
> >>>>>
> >>>>> 1. I have two option, upgrade minor release from 17.0.7-6-g9187bb1 to
> >>>>> 17.0.8-23-g0aff517  and upgrade full OSA
> >>>>>
> >>>>> 2. Just do override as you said "nova_git_install_branch:" in my
> >>>>> /etc/openstack_deploy/user_variables.yml  file, and run playbooks.
> >>>>>
> >>>>>
> >>>>> I think option [2] is safe to just touch specific component, also am i
> >>>>> correct about override in /etc/openstack_deploy/user_variables.yml
> >>>>> file?
> >>>>>
> >>>>> You mentioned "nova_git_install_branch:
> >>>>> dee99b1ed03de4b6ded94f3cf6d2ea7214bca93b" but i believe it should be
> >>>>> "a9c9285a5a68ab89a6543d143c364d90a01cd51c" am i correct?
> >>>>>
> >>>>>
> >>>>>
> >>>>> On Wed, Aug 22, 2018 at 10:46 AM, Matthew Thode
> >>>>> <prometheanfire at gentoo.org> wrote:
> >>>>>> On 18-08-22 10:33:11, Satish Patel wrote:
> >>>>>>> Thanks Matthew,
> >>>>>>>
> >>>>>>> Can i put that sha in my OSA at
> >>>>>>> playbooks/defaults/repo_packages/openstack_services.yml by hand and
> >>>>>>> run playbooks [repo/nova] ?
> >>>>>>>
> >>>>>>> On Wed, Aug 22, 2018 at 10:24 AM, Matthew Thode
> >>>>>>> <prometheanfire at gentoo.org> wrote:
> >>>>>>>> On 18-08-22 08:35:09, Satish Patel wrote:
> >>>>>>>>> Currently in stable/queens i am seeing this sha
> >>>>>>>>> https://github.com/openstack/openstack-ansible/blob/stable/queens/ansible-role-requirements.yml#L112
> >>>>>>>>>
> >>>>>>>>> On Wed, Aug 22, 2018 at 2:02 AM, Matthew Thode
> >>>>>>>>> <prometheanfire at gentoo.org> wrote:
> >>>>>>>>>> On 18-08-22 01:57:17, Satish Patel wrote:
> >>>>>>>>>>> What I need to upgrade, any specific component?
> >>>>>>>>>>>
> >>>>>>>>>>> I have deployed openstack-ansible
> >>>>>>>>>>>
> >>>>>>>>>>> Sent from my iPhone
> >>>>>>>>>>>
> >>>>>>>>>>>>> On Aug 22, 2018, at 1:06 AM, Matthew Thode <prometheanfire at gentoo.org> wrote:
> >>>>>>>>>>>>>
> >>>>>>>>>>>>> On 18-08-22 01:02:53, Satish Patel wrote:
> >>>>>>>>>>>>> Matthew,
> >>>>>>>>>>>>>
> >>>>>>>>>>>>> Thanks for reply, Look like i don't have this patch
> >>>>>>>>>>>>> https://review.openstack.org/#/c/591761/
> >>>>>>>>>>>>>
> >>>>>>>>>>>>> So i have to patch following 3 file manually?
> >>>>>>>>>>>>>
> >>>>>>>>>>>>> nova/tests/unit/virt/libvirt/test_driver.py213
> >>>>>>>>>>>>> nova/tests/unit/virt/test_virt_drivers.py2
> >>>>>>>>>>>>> nova/virt/libvirt/driver.py
> >>>>>>>>>>>>>
> >>>>>>>>>>>>>
> >>>>>>>>>>>>> On Wed, Aug 22, 2018 at 12:42 AM, Matthew Thode
> >>>>>>>>>>>>> <prometheanfire at gentoo.org> wrote:
> >>>>>>>>>>>>>> On 18-08-22 00:27:08, Satish Patel wrote:
> >>>>>>>>>>>>>>> Folks,
> >>>>>>>>>>>>>>>
> >>>>>>>>>>>>>>> I am running openstack queens and hypervisor is kvm, my live migration
> >>>>>>>>>>>>>>> working fine. but somehow it stuck to 8 Mb network speed and taking
> >>>>>>>>>>>>>>> long time to migrate 1G instance.  I have 10Gbps network and i have
> >>>>>>>>>>>>>>> tried to copy 10G file between two compute node and it did copy in 2
> >>>>>>>>>>>>>>> minute, so i am not seeing any network issue also.
> >>>>>>>>>>>>>>>
> >>>>>>>>>>>>>>> it seem live_migration has some bandwidth limit, I have tried
> >>>>>>>>>>>>>>> following option in nova.conf but it didn't work
> >>>>>>>>>>>>>>>
> >>>>>>>>>>>>>>> live_migration_bandwidth = 500
> >>>>>>>>>>>>>>>
> >>>>>>>>>>>>>>> My nova.conf look like following:
> >>>>>>>>>>>>>>>
> >>>>>>>>>>>>>>> live_migration_uri =
> >>>>>>>>>>>>>>> "qemu+ssh://nova@%s/system?no_verify=1&keyfile=/var/lib/nova/.ssh/id_rsa"
> >>>>>>>>>>>>>>> live_migration_tunnelled = True
> >>>>>>>>>>>>>>> live_migration_bandwidth = 500
> >>>>>>>>>>>>>>> hw_disk_discard = unmap
> >>>>>>>>>>>>>>> disk_cachemodes = network=writeback
> >>>>>>>>>>>>>>>
> >>>>>>>>>>>>>>
> >>>>>>>>>>>>>> Do you have a this patch (and a couple of patches up to it)?
> >>>>>>>>>>>>>> https://bugs.launchpad.net/nova/+bug/1786346
> >>>>>>>>>>>>>>
> >>>>>>>>>>>>
> >>>>>>>>>>>> I don't know if that would cleanly apply (there are other patches that
> >>>>>>>>>>>> changed those functions within the last month and a half.  It'd be best
> >>>>>>>>>>>> to upgrade and not do just one patch (which would be an untested
> >>>>>>>>>>>> process).
> >>>>>>>>>>>>
> >>>>>>>>>>
> >>>>>>>>>> The sha for nova has not been updated yet (next update is 24-48 hours
> >>>>>>>>>> away iirc), once that's done you can use the head of stable/queens from
> >>>>>>>>>> OSA and run a inter-series upgrade (but the minimal thing to do would be
> >>>>>>>>>> to run repo-build and os-nova plays).  I'm not sure when that sha bump
> >>>>>>>>>> will be tagged in a full release if you would rather wait on that.
> >>>>>>>>
> >>>>>>>> it's this sha that needs updating.
> >>>>>>>> https://github.com/openstack/openstack-ansible/blob/stable/queens/playbooks/defaults/repo_packages/openstack_services.yml#L173
> >>>>>>>>
> >>>>>>
> >>>>>> I'm not sure how you are doing overrides, but set the following as an
> >>>>>> override, then rerun the repo-build playbook (to rebuild the nova venv)
> >>>>>> then rerun the nova playbook to install it.
> >>>>>>
> >>>>>> nova_git_install_branch: dee99b1ed03de4b6ded94f3cf6d2ea7214bca93b
> >>>>>>
> >>>>
> >>>> The sha I gave was head of the queens branch of openstack/nova.  It's
> >>>> also the commit in that branch that containst the fix.
> >>>>
> >>
> >> I don't think that is known behavior, different memory pressure causing
> >> the difference maybe?
> >>

You just need the following var.

nova_git_install_branch: a9c9285a5a68ab89a6543d143c364d90a01cd51c

Once defined you'll need to `cd` into the playbooks directory within
openstack-ansible and run `openstack-ansible repo-build.yml` and
`openstack-ansible os-nova-install.yml`.  That should get you updated.

-- 
Matthew Thode (prometheanfire)
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