<div dir="ltr">Thanks Tobias - thats my last resort. I'd still need to upload that image to the new openstack and then build an instance from the image. I'd also need to use metadata to make sure the instance was built with the same components (IP address etc). <br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><p><br></p><p style="background-image:initial;background-position:initial;background-repeat:initial"><a name="SignatureSanitizer_SafeHtmlFilter__MailAutoSig"><b><span style="font-size:10pt;font-family:Arial,sans-serif;color:black">Tony Pearce</span></b></a><span style="font-size:9pt;font-family:Arial,sans-serif;color:black">
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</p><p> </p></div></div></div></div></div></div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, 30 Jan 2020 at 17:55, Tobias Urdin <<a href="mailto:tobias.urdin@binero.se">tobias.urdin@binero.se</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">
Another approach would be to export the data to Glance and download
then you can upload it somewhere.<br>
<br>
There is no ready thing that I know about. We used the openstacksdk
to simply recreate the steps we did on CLI.<br>
Create all the neccesary resources on the other side, create new
instances from the migrated volume and set a fixedIP on the neutron
port to get same IP address.<br>
<br>
<div>On 1/30/20 9:43 AM, Tony Pearce wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">I want to do something similar soon and don't want
to touch the db (I experimented with cloning the "controller"
and it did not achieve any desired outcome).
<div><br>
</div>
<div>Is there a way to export an instance from Openstack in
terms of something like a script that could re-create it on
another openstack as a like-for-like? I guess this is assuming
that the instance is linux-based and has cloud-init enabled. <br clear="all">
<div>
<div dir="ltr">
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<p style="background-image:initial;background-position:initial;background-repeat:initial"><a name="m_7655385463335053403_SignatureSanitizer_SafeHtmlFilter__MailAutoSig"><b><span style="font-size:10pt;font-family:Arial,sans-serif;color:black">Tony
Pearce</span></b></a><span style="font-size:9pt;font-family:Arial,sans-serif;color:black">
| </span><b><span style="font-family:Arial,sans-serif;color:rgb(0,112,192)"><span style="font-size:9pt">Senior Network
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</span></span><span style="color:black;font-family:Arial,sans-serif;font-size:10pt">1
Walsh Loop, Joondalup, WA 6027 Australia.</span></p>
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8 6202 0036</span><span style="font-size:10pt;font-family:Arial,sans-serif;color:black"> | </span><span style="font-size:9.5pt;font-family:Arial,sans-serif" lang="EN-US"></span><span style="font-size:10pt;font-family:Arial,sans-serif;color:black">Main: </span><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(17,85,204)">+61
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</div>
<br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Thu, 30 Jan 2020 at 16:39,
Tobias Urdin <<a href="mailto:tobias.urdin@binero.se" target="_blank">tobias.urdin@binero.se</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">We did this something similar recently,
we booted all instances from Cinder volume (with "Delete on
terminate" set) in an old platform.<br>
<br>
So we added our new Ceph storage to the old platform,
removed instances (updated delete_on_terminate to 0 in Nova
DB).<br>
Then we issued a retype so cinder-volume performed a `dd` of
the volume from the old to the new storage.<br>
<br>
We then synced network/subnet/sg and started instances with
same fixed IP and moved floating IPs to the new platform.<br>
<br>
Since you only have to swap storage you should experiment
with powering off the instances and try doing a migrate of
the volume<br>
but I suspect you need to either remove the instance or do
some really nasty database operations.<br>
<br>
I would suggest always going through the API and recreate
the instance from the migrated volume instead of changing in
the DB.<br>
We had to update delete_on_terminate in DB but that was
pretty trivial (and I even think there is a spec that is not
implemented yet that will allow that from API).<br>
<br>
<div>On 1/29/20 9:54 PM, Jean-Philippe Méthot wrote:<br>
</div>
<blockquote type="cite">Hi,
<div><br>
</div>
<div>We have a several hundred VMs which were built on
cinder block devices as root drives which use a SAN
backend. Now we want to change their backend from the
SAN to Ceph.</div>
<div>We can shutdown the VMs but we will not destroy them.
I am aware that there is a cinder migrate volume command
to change a volume’s backend, but it requires that the
volume be completely detached. Forcing a detached state
on</div>
<div>that volume does let the volume migration take place,
but the volume’s path in Nova block_device_mapping
doesn’t update, for obvious reasons.</div>
<div><br>
</div>
<div>So, I am considering forcing the volumes to a
detached status in Cinder and then manually updating the
nova db block_device_mapping entry for each volume so
that the VM can boot back up afterwards. </div>
<div>However, before I start toying with the database and
accidentally break stuff, has anyone else ever done
something similar? Got any tips or hints on how best to
proceed?</div>
<div><br>
</div>
<div>
<div>
<div style="color:rgb(0,0,0);font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">Jean-Philippe
Méthot</div>
<div style="color:rgb(0,0,0);font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">Openstack
system administrator</div>
<div style="color:rgb(0,0,0);font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">Administrateur
système Openstack</div>
<div style="color:rgb(0,0,0);font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">PlanetHoster
inc.</div>
<div style="color:rgb(0,0,0);font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><br>
</div>
<div style="color:rgb(0,0,0);font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><br>
</div>
<br>
</div>
<br>
</div>
</blockquote>
<br>
</div>
</blockquote>
</div>
</blockquote>
<br>
</div>
</blockquote></div>