<div dir="ltr"><div>I think it will a rather hard problem to solve. As swift store can be configured to store objects in different configurations. I guess the next question would be, what is your underlying problem -- multiple build requests or is this for retry for a single download?<br><br></div>If the image is in image cache and you are hitting the glance node with cached image (which is quite possible for tiny deployments), this feature will be relatively easier.<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Nov 13, 2017 at 6:47 AM, Matt Keenan <span dir="ltr"><<a href="mailto:matt.keenan@oracle.com" target="_blank">matt.keenan@oracle.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
<br>
Just configured devstack on Fedora 26, and by default glance_store uses swift for image storage. When attempting to get a specific range from a glance stored image, it's reporting range requests are not supported e.g.:<br>
<br>
$ curl -i -X GET -r 0-32 -H "X-Auth-Token: $auth_token" <a href="http://10.169.104.255/image/v2/images/29b7aa" rel="noreferrer" target="_blank">http://10.169.104.255/image/v2<wbr>/images/29b7aa</a><br>
5e-3ec2-49b5-ab6b-d6cc5099f46c<wbr>/file<br>
HTTP/1.1 400 Bad Request<br>
Date: Mon, 13 Nov 2017 10:43:23 GMT<br>
Server: Apache/2.4.27 (Fedora) OpenSSL/1.1.0f-fips mod_wsgi/4.5.15 Python/2.7<br>
Content-Length: 205<br>
Content-Type: text/html; charset=UTF-8<br>
x-openstack-request-id: req-5ed2239f-165b-406f-969b-5c<wbr>c4ab8c632d<br>
Connection: close<br>
<br>
<html><br>
<head><br>
<title>400 Bad Request</title><br>
</head><br>
<body><br>
<h1>400 Bad Request</h1><br>
Getting images randomly from this store is not supported. Offset: 0, length: 33<br /><br /><br>
</body><br>
<br>
Upon investigation, glance-api log is emitting:<br>
<br>
Nov 13 10:45:31 devstack@g-api.service[22783]: #033[01;31mERROR glance.location [#033[01;36mNone req-ad6da3f0-ead1-486a-a873-d3<wbr>01f02b0888 #033[00;36mdemo demo#033[01;31m] #033[01;35m#033[0│············<wbr>·········1;31mGlance tried all active locations to get data for image 29b7aa5e-3ec2-49b5-ab6b-d6cc50<wbr>99f46c but all have failed.#033[00m: StoreRandomGetNotSupported: Getting images randomly from this store is notMDg4OCAjMDMzWzAwOzM2bW supported. Offset: 0, length: 33<br>
<br>
The exception StoreRandomGetNotSupported is emitted by glance_store from glance_store/capabilities.py:<br>
<br>
op_exec_map = {<br>
'get': (exceptions.StoreRandomGetNotS<wbr>upported<br>
if kwargs.get('offset') or kwargs.get('chunk_size') else<br>
exceptions.StoreGetNotSupporte<wbr>d),<br>
'add': exceptions.StoreAddDisabled,<br>
'delete': exceptions.StoreDeleteNotSuppo<wbr>rted}<br>
<br>
Looking at _driver/swift/store.py I think range requests are supported, it I've be unsuccessful in configuring it.<br>
<br>
Does the glance_store swift driver support range requests ?<br>
<br>
Can it be configured within a conf file, by somehow adding a capability ?<br>
<br>
thanks<span class="HOEnZb"><font color="#888888"><br>
<br>
Matt<br>
<br>
-- <br>
<br>
<br>
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</font></span></blockquote></div><br><br clear="all"><br>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div>--<br></div>Thanks,<br></div>Nikhil<br></div></div>
</div>