10:29 a.m.
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Ovirt uses dd and qemu-img for live migration. Is it possible to limit
the number of concurrent live storage moves or limit the bandwidth used?
I'd like to move about 30 disks to another storage during the night, but
each takes about 30 minutes each and if more than one runs, it chokes my
storage.
--
Ernest Beinrohr, AXON PRO
Ing <http://www.beinrohr.sk/ing.php>;, RHCE
<http://www.beinrohr.sk/rhce.php>;, RHCVA
<http://www.beinrohr.sk/rhce.php>;, LPIC
<http://www.beinrohr.sk/lpic.php>;, VCA <http://www.beinrohr.sk/vca.php>;,
+421-2-62410360 +421-903-482603
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Ovirt uses dd and qemu-img for live migration. Is it possible to
limit the number of concurrent live storage moves or limit the
bandwidth used?<br>
<br>
<br>
I'd like to move about 30 disks to another storage during the night,
but each takes about 30 minutes each and if more than one runs, it
chokes my storage. <br>
<br>
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10:33 a.m.
Why not just script them to migrate one after the other? The CLI is nice
and simple, and the SDK is even nicer
On Tue, Apr 21, 2015 at 11:29 AM, Ernest Beinrohr <
Ernest.Beinrohr(a)axonpro.sk> wrote:
Ovirt uses dd and qemu-img for live migration. Is it possible to
limit
the number of concurrent live storage moves or limit the bandwidth used?
I'd like to move about 30 disks to another storage during the night, but
each takes about 30 minutes each and if more than one runs, it chokes my
storage.
--
Ernest Beinrohr, AXON PRO
Ing <http://www.beinrohr.sk/ing.php>;, RHCE
<http://www.beinrohr.sk/rhce.php>;, RHCVA <http://www.beinrohr.sk/rhce.php>;,
LPIC <http://www.beinrohr.sk/lpic.php>;, VCA
<http://www.beinrohr.sk/vca.php>;,
+421-2-62410360 +421-903-482603
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4:44 a.m.
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Dňa 21.04.2015 o 17:33 Dan Yasny napísal(a):
Why not just script them to migrate one after the other? The CLI is
nice and simple, and the SDK is even nicer
Well I gave it a try, but I'm quite
new to python and this does not work
as expected:
for vm in vms:
print vm.name
for disk in vm.disks.list( ):
print " disk: " + disk.name
sd = api.storagedomains.get('newstorage')
disk.move(params.Disk(storage_domains=params.StorageDomains(storage_domain=[sd])))
status: 500
reason: Internal Server Error
detail: HTTP Status 500 - Bad arguments passed to public abstract
javax.ws.rs.core.Response
org.ovirt.engine.api.resource.MovableResource.move(org.ovirt.engine.api.model.Action)
( org.ovirt.engine.api.model.Disk org.ovirt.engine.api.model.Disk@6a0db58b )
--
Ernest Beinrohr, AXON PRO
Ing <http://www.beinrohr.sk/ing.php>;, RHCE
<http://www.beinrohr.sk/rhce.php>;, RHCVA
<http://www.beinrohr.sk/rhce.php>;, LPIC
<http://www.beinrohr.sk/lpic.php>;, VCA <http://www.beinrohr.sk/vca.php>;,
+421-2-62410360 +421-903-482603
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<div class="moz-cite-prefix">Dňa 21.04.2015 o 17:33 Dan Yasny
napísal(a):<br>
</div>
<blockquote
cite="mid:CALLXwb6s2S-mDdXFQ9aPbEYwT1SzFS_pG8r2wxS6djEQHnaHfA@mail.gmail.com"
type="cite">
<div dir="ltr">Why not just script them to migrate one after the
other? The CLI is nice and simple, and the SDK is even nicer</div>
</blockquote>
Well I gave it a try, but I'm quite new to python and this does not
work as expected:<br>
<br>
for vm in vms:<br>
print vm.name<br>
for disk in vm.disks.list( ):<br>
print " disk: " + disk.name<br>
sd = api.storagedomains.get('newstorage')<br>
disk.move(params.Disk(storage_domains=params.StorageDomains(storage_domain=[sd])))<br>
<br>
<br>
status: 500<br>
reason: Internal Server Error<br>
detail: HTTP Status 500 - Bad arguments passed to public abstract
javax.ws.rs.core.Response
org.ovirt.engine.api.resource.MovableResource.move(org.ovirt.engine.api.model.Action)
( org.ovirt.engine.api.model.Disk
org.ovirt.engine.api.model.Disk@6a0db58b )<br>
<br>
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monospace; font-size: 90%;">
Ernest Beinrohr, AXON PRO<br>
<a style="text-decoration: none; color: gray;"
href="http://www.beinrohr.sk/ing.php">Ing</a>, <a
style="text-decoration: none; color: gray;"
href="http://www.beinrohr.sk/rhce.php">RHCE</a>, <a
style="text-decoration: none; color: gray;"
href="http://www.beinrohr.sk/rhce.php">RHCVA</a>, <a
style="text-decoration: none; color: gray;"
href="http://www.beinrohr.sk/lpic.php">LPIC</a>, <a
style="text-decoration: none; color: gray;"
href="http://www.beinrohr.sk/vca.php">VCA</a>, <br>
+421-2-62410360 +421-903-482603
<br>
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6:09 a.m.
On 04/22/2015 11:44 AM, Ernest Beinrohr wrote:
Dňa 21.04.2015 o 17:33 Dan Yasny napísal(a):
> Why not just script them to migrate one after the other? The CLI is
> nice and simple, and the SDK is even nicer
Well I gave it a try, but I'm quite new to python and this does not work
as expected:
for vm in vms:
print vm.name
for disk in vm.disks.list( ):
print " disk: " + disk.name
sd = api.storagedomains.get('newstorage')
disk.move(params.Disk(storage_domains=params.StorageDomains(storage_domain=[sd])))
status: 500
reason: Internal Server Error
detail: HTTP Status 500 - Bad arguments passed to public abstract
javax.ws.rs.core.Response
org.ovirt.engine.api.resource.MovableResource.move(org.ovirt.engine.api.model.Action)
( org.ovirt.engine.api.model.Disk org.ovirt.engine.api.model.Disk@6a0db58b )
The parameter to the "move" method should be an "Action", containing
a
reference to the target storage domain. You need something like this:
---8<---
#!/usr/bin/python
import time
from ovirtsdk import api
from ovirtsdk.xml import params
# Connect to the server:
api = api.API(
url="https://ovirt.example.com/ovirt-engine/api";,
username="admin@internal",
password="***",
insecure=True,
debug=False
)
# Find the VM whose disks we want to move:
vm = api.vms.get(name="myvm")
# Create the information of the storage domain where we will
# move the disks to. Note that we only need to know the name
# (or id) of the storage domain, the server will locate it so
# we don't need to look it up here:
sd = params.StorageDomain(name="newstorage")
# Iterate the disks of the VM and for each of them move it
# to the target storage domain:
for disk in vm.disks.list():
# Start moving the disk. Note that this is an asynchronous
# operation, so once the "move" method returns you will
# have to wait for the actual movement to finish.
print("Moving disk \"%s\" ..." % disk.get_alias())
disk.move(
params.Action(
storage_domain=sd
)
)
# Wait till the state of the disk is "ok", which means it
# has been moved completely. Note that it is important to
# wait a few seconds before doing the first check, as
# otherwise you will get the status of the disk before
# the movement started, thus you would get "ok" but
# because the movement didn't start yet.
disk_id = disk.get_id()
while True:
print("Waiting for movement to complete ...")
time.sleep(5)
disk = vm.disks.get(id=disk_id)
if disk.get_status().get_state() == "ok":
break
# Bye:
api.disconnect()
--->8---
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8:12 a.m.
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Dňa 22.04.2015 o 13:09 Juan Hernández napísal(a):
# Iterate the disks of the VM and for each of them move it
# to the target storage domain:
for disk in vm.disks.list():
# Start moving the disk. Note that this is an asynchronous
# operation, so once the "move" method returns you will
# have to wait for the actual movement to finish.
print("Moving disk \"%s\" ..." % disk.get_alias())
disk.move(
params.Action(
storage_domain=sd
)
)
This works nicely, thank you.
--
Ernest Beinrohr, AXON PRO
Ing <http://www.beinrohr.sk/ing.php>;, RHCE
<http://www.beinrohr.sk/rhce.php>;, RHCVA
<http://www.beinrohr.sk/rhce.php>;, LPIC
<http://www.beinrohr.sk/lpic.php>;, VCA <http://www.beinrohr.sk/vca.php>;,
+421-2-62410360 +421-903-482603
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<div class="moz-cite-prefix">Dňa 22.04.2015 o 13:09 Juan Hernández
napísal(a):
</div>
<blockquote cite="mid:55378153.8050203@redhat.com"
type="cite">
<pre wrap="">
# Iterate the disks of the VM and for each of them move it
# to the target storage domain:
for disk in vm.disks.list():
# Start moving the disk. Note that this is an asynchronous
# operation, so once the "move" method returns you will
# have to wait for the actual movement to finish.
print("Moving disk \"%s\" ..." % disk.get_alias())
disk.move(
params.Action(
storage_domain=sd
)
)
</pre>
</blockquote>
This works nicely, thank you.<br>
<br>
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<div id="oernii_footer" style="color: gray;">
<span style="font-family: Lucida Console, Luxi Mono, Courier,
monospace; font-size: 90%;">
Ernest Beinrohr, AXON PRO<br>
<a style="text-decoration: none; color: gray;"
href="http://www.beinrohr.sk/ing.php">Ing</a>, <a
style="text-decoration: none; color: gray;"
href="http://www.beinrohr.sk/rhce.php">RHCE</a>, <a
style="text-decoration: none; color: gray;"
href="http://www.beinrohr.sk/rhce.php">RHCVA</a>, <a
style="text-decoration: none; color: gray;"
href="http://www.beinrohr.sk/lpic.php">LPIC</a>, <a
style="text-decoration: none; color: gray;"
href="http://www.beinrohr.sk/vca.php">VCA</a>, <br>
+421-2-62410360 +421-903-482603
<br>
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