<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><div>Hi Chen,</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<div lang="EN-US" link="blue" vlink="purple"><div><p class="MsoNormal">I’m not an experienced developer, so , could you explain more about “Perhaps the live_migrate task is passing the incorrect context in for this database query?” ?</p>
</div></div></blockquote><div>Sorry, I should have clarified that that question was for the developers *out there*. (cc's the dev list now). I'm not really a developer either so we will have to see what they say. ;-)</div>
<div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div lang="EN-US" link="blue" vlink="purple">
<p class="MsoNormal">
<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Here is what I understand.<u></u><u></u></p>
<p class="MsoNormal">The issue is basically caused by <span style="font-size:9pt;font-family:Consolas;color:rgb(51,51,51);background:white">@require_admin_context for
</span>db.service_get_by_compute_host()<span style="font-size:9pt;font-family:Consolas;color:rgb(51,51,51);background:white">.</span></p></div></blockquote><div>Yes, the request is failing because @require_admin_context only checks for the "admin" role in the context. It's somewhat of a holdover from when there was just admin and everything else.</div>
<div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div lang="EN-US" link="blue" vlink="purple">
<p class="MsoNormal">Then, should this a bug ?</p></div></blockquote><div> </div><div>Possibly. I can see why db.service_get_by_compute_host() should be an admin-only call, but I am assuming that there must be a way for nova to switch the running context to itself once it has authorized the live-migrate task.</div>
<div><br></div><div>But I suspect few people have tried to allow non-admin's to live-migrate and this is just a bug from that.</div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<div lang="EN-US" link="blue" vlink="purple"><p class="MsoNormal">Why “nova migrate” command do not need to check compute host ?</p></div></blockquote><div> </div><div>Sorry, this is a bit fastidious, but I think "nova live-migrate" is what you mean here. "nova migrate", I think, is still a completely separate code-path. live-migrate needs to talk to both the source and destination nova-compute services to coordinate and confirm the migration.</div>
<div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div lang="EN-US" link="blue" vlink="purple">
<div>
<p class="MsoNormal"><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:9pt;font-family:Consolas;color:rgb(51,51,51);background:white"><u></u> <u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Thanks.<u></u><u></u></p>
<p class="MsoNormal">-chen<span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></p>
<p class="MsoNormal"><b><span style="font-size:10pt;font-family:Tahoma,sans-serif">From:</span></b><span style="font-size:10pt;font-family:Tahoma,sans-serif"> Scott Devoid [mailto:<a href="mailto:devoid@anl.gov" target="_blank">devoid@anl.gov</a>]
<br>
<b>Sent:</b> Thursday, June 26, 2014 9:34 AM<br>
<b>To:</b> Li, Chen<br>
<b>Cc:</b> Sushma Korati; <a href="mailto:openstack@lists.openstack.org" target="_blank">openstack@lists.openstack.org</a><br>
<b>Subject:</b> Re: [Openstack] How can I enable operation for non-admin user<u></u><u></u></span></p><div><div class="h5">
<p class="MsoNormal"><u></u> <u></u></p>
<div>
<p class="MsoNormal">Hi Li,<u></u><u></u></p>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">The problem here is that db.service_get_by_compute_host() requires admin context. [1] The live_migrate command needs to check that both hosts have a running nova-compute service before it begins migration. Perhaps the live_migrate task
is passing the incorrect context in for this database query? [2] I would think that conductor should be running under it's own context and not the caller's context? (Devs?)<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">And before someone comments that migration should always be *admin-only*, I'll point out that there are legitimate reasons an operator might want to give someone migrate permissions and not all admin permissions.<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">~ Scott<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">[1] <a href="https://github.com/openstack/nova/blob/master/nova/db/sqlalchemy/api.py#L485" target="_blank">https://github.com/openstack/nova/blob/master/nova/db/sqlalchemy/api.py#L485</a><u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">[2] <a href="https://github.com/openstack/nova/blob/master/nova/conductor/tasks/live_migrate.py#L87" target="_blank">https://github.com/openstack/nova/blob/master/nova/conductor/tasks/live_migrate.py#L87</a><u></u><u></u></p>
</div>
</div>
<div>
<p class="MsoNormal" style="margin-bottom:12pt"><u></u> <u></u></p>
<div>
<p class="MsoNormal">On Tue, Jun 24, 2014 at 9:11 PM, Li, Chen <<a href="mailto:chen.li@intel.com" target="_blank">chen.li@intel.com</a>> wrote:<u></u><u></u></p>
<div>
<div>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">Hi
</span><span style="font-size:10pt;font-family:Tahoma,sans-serif;color:black">Sushma,</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10pt;font-family:Tahoma,sans-serif;color:black"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10pt;font-family:Tahoma,sans-serif;color:black">Thanks for the reply.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10pt;font-family:Tahoma,sans-serif;color:black"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10pt;font-family:Tahoma,sans-serif;color:black">Well, edit /etc/nova/policy.json do works for command “nova migrate”.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10pt;font-family:Tahoma,sans-serif;color:black"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10pt;font-family:Tahoma,sans-serif;color:black">But when I run command “nova live-migration”, I still get errors, in /var/log/nova/conductor.log:</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10pt;font-family:Tahoma,sans-serif;color:black"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10pt;font-family:Tahoma,sans-serif;color:black"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:07:23.897 115385 INFO oslo.messaging._drivers.impl_qpid [-] Connected to AMQP server on
<a href="http://192.168.40.122:5672" target="_blank">192.168.40.122:5672</a></span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.221 115395 ERROR nova.conductor.manager [req-63f0a004-ef69-47f4-aefb-e0fa194d99b9 fa970646fa92442fa14b2b759cf381a6 2eb6bd3a69ad454a90489dd12b9cdf3b]
Migration of instance 446d96d7-2073-46ac-b40c-0f167fbd04b2 to host None unexpectedly failed.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.221 115395 TRACE nova.conductor.manager Traceback (most recent call last):</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.221 115395 TRACE nova.conductor.manager File "/usr/lib/python2.6/site-packages/nova/conductor/manager.py", line 757, in _live_migrate</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.221 115395 TRACE nova.conductor.manager block_migration, disk_over_commit)</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.221 115395 TRACE nova.conductor.manager File "/usr/lib/python2.6/site-packages/nova/conductor/tasks/live_migrate.py", line 191,
in execute</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.221 115395 TRACE nova.conductor.manager return task.execute()</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.221 115395 TRACE nova.conductor.manager File "/usr/lib/python2.6/site-packages/nova/conductor/tasks/live_migrate.py", line 56,
in execute</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.221 115395 TRACE nova.conductor.manager self._check_host_is_up(self.source)</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.221 115395 TRACE nova.conductor.manager File "/usr/lib/python2.6/site-packages/nova/conductor/tasks/live_migrate.py", line 87,
in _check_host_is_up</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.221 115395 TRACE nova.conductor.manager service = db.service_get_by_compute_host(self.context, host)</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.221 115395 TRACE nova.conductor.manager File "/usr/lib/python2.6/site-packages/nova/db/api.py", line 129, in service_get_by_compute_host</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.221 115395 TRACE nova.conductor.manager return IMPL.service_get_by_compute_host(context, host)</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.221 115395 TRACE nova.conductor.manager File "/usr/lib/python2.6/site-packages/nova/db/sqlalchemy/api.py", line 145, in wrapper</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.221 115395 TRACE nova.conductor.manager nova.context.require_admin_context(args[0])</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.221 115395 TRACE nova.conductor.manager File "/usr/lib/python2.6/site-packages/nova/context.py", line 195, in require_admin_context</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.221 115395 TRACE nova.conductor.manager raise exception.AdminRequired()</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.221 115395 TRACE nova.conductor.manager AdminRequired: User does not have admin privileges</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.221 115395 TRACE nova.conductor.manager</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.226 115395 ERROR oslo.messaging.rpc.dispatcher [-] Exception during message handling: Migration error: User does not have admin privileges</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.226 115395 TRACE oslo.messaging.rpc.dispatcher Traceback (most recent call last):</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.226 115395 TRACE oslo.messaging.rpc.dispatcher File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 133,
in _dispatch_and_reply</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.226 115395 TRACE oslo.messaging.rpc.dispatcher incoming.message))</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.226 115395 TRACE oslo.messaging.rpc.dispatcher File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 176,
in _dispatch</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.226 115395 TRACE oslo.messaging.rpc.dispatcher return self._do_dispatch(endpoint, method, ctxt, args)</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.226 115395 TRACE oslo.messaging.rpc.dispatcher File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 122,
in _do_dispatch</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.226 115395 TRACE oslo.messaging.rpc.dispatcher result = getattr(endpoint, method)(ctxt, **new_args)</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.226 115395 TRACE oslo.messaging.rpc.dispatcher File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/server.py", line 139,
in inner</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.226 115395 TRACE oslo.messaging.rpc.dispatcher return func(*args, **kwargs)</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.226 115395 TRACE oslo.messaging.rpc.dispatcher File "/usr/lib/python2.6/site-packages/nova/conductor/manager.py", line 681, in
migrate_server</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.226 115395 TRACE oslo.messaging.rpc.dispatcher block_migration, disk_over_commit)</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.226 115395 TRACE oslo.messaging.rpc.dispatcher File "/usr/lib/python2.6/site-packages/nova/conductor/manager.py", line 783, in
_live_migrate</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.226 115395 TRACE oslo.messaging.rpc.dispatcher raise exception.MigrationError(reason=ex)</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.226 115395 TRACE oslo.messaging.rpc.dispatcher MigrationError: Migration error: User does not have admin privileges</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.226 115395 TRACE oslo.messaging.rpc.dispatcher</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.228 115395 ERROR oslo.messaging._drivers.common [-] Returning exception Migration error: User does not have admin privileges to caller</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">2014-06-25 02:08:59.228 115395 ERROR oslo.messaging._drivers.common [-] ['Traceback (most recent call last):\n', ' File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py",
line 133, in _dispatch_and_reply\n incoming.message))\n', ' File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 176, in _dispatch\n return self._do_dispatch(endpoint, method, ctxt, args)\n', ' File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py",
line 122, in _do_dispatch\n result = getattr(endpoint, method)(ctxt, **new_args)\n', ' File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/server.py", line 139, in inner\n return func(*args, **kwargs)\n', ' File "/usr/lib/python2.6/site-packages/nova/conductor/manager.py",
line 681, in migrate_server\n block_migration, disk_over_commit)\n', ' File "/usr/lib/python2.6/site-packages/nova/conductor/manager.py", line 783, in _live_migrate\n raise exception.MigrationError(reason=ex)\n', 'MigrationError: Migration error: User
does not have admin privileges\n']</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)"> </span><u></u><u></u></p>
<div>
<div style="border-style:solid none none;border-top-color:rgb(181,196,223);border-top-width:1pt;padding:3pt 0in 0in">
<p class="MsoNormal"><b><span style="font-size:10pt;font-family:Tahoma,sans-serif">From:</span></b><span style="font-size:10pt;font-family:Tahoma,sans-serif"> Sushma Korati [mailto:<a href="mailto:sushma_korati@persistent.co.in" target="_blank">sushma_korati@persistent.co.in</a>]
<br>
<b>Sent:</b> Tuesday, June 24, 2014 4:43 PM<br>
<b>To:</b> Li, Chen; <a href="mailto:openstack@lists.openstack.org" target="_blank">
openstack@lists.openstack.org</a><br>
<b>Subject:</b> RE: How can I enable operation for non-admin user</span><u></u><u></u></p>
</div>
</div>
<div>
<p class="MsoNormal"> <u></u><u></u></p>
<div>
<p style="background:white"><span style="font-size:10pt;font-family:Tahoma,sans-serif;color:black"> </span><u></u><u></u></p>
<div>
<p class="MsoNormal" style="margin-bottom:12pt;background:white">
<span style="font-size:10pt;font-family:Tahoma,sans-serif;color:black">Hi Li,<br>
<br>
As fas as I know to migrate an instance you'll need admin priviliges.<br>
But if you want to allow this operation for normal user then might try editing /etc/nova/policy.json file and give privileges.
<br>
<br>
File: /etc/nova/policy.json <br>
change "compute_extension:admin_actions:migrate": "rule:admin_api" to<br>
"compute_extension:admin_actions:migrate": "<strong><span style="font-family:Tahoma,sans-serif">rule:admin_or_owner</span></strong>"<br>
<br>
<br>
Regards,<br>
Sushma </span><u></u><u></u></p>
<div name="divtagdefaultwrapper">
<div>
<div>
<p class="MsoNormal" style="margin-bottom:12pt;background:white">
<span style="font-size:10pt;font-family:Tahoma,sans-serif;color:black"> </span><u></u><u></u></p>
</div>
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<div class="MsoNormal" align="center" style="text-align:center;background:white">
<span style="font-size:10pt;font-family:Tahoma,sans-serif;color:rgb(40,40,40)">
<hr size="2" width="98%" align="center">
</span></div>
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<p class="MsoNormal" style="background:white">
<b><span style="color:black">From:</span></b><span style="color:black"> Li, Chen <<a href="mailto:chen.li@intel.com" target="_blank">chen.li@intel.com</a>><br>
<b>Sent:</b> Tuesday, June 24, 2014 1:44 PM<br>
<b>To:</b> <a href="mailto:openstack@lists.openstack.org" target="_blank">openstack@lists.openstack.org</a><br>
<b>Subject:</b> [Openstack] How can I enable operation for non-admin user</span><span style="font-size:10pt;font-family:Tahoma,sans-serif;color:rgb(40,40,40)">
</span><u></u><u></u></p>
<div>
<p class="MsoNormal" style="background:white">
<span style="font-size:10pt;font-family:Tahoma,sans-serif;color:rgb(40,40,40)"> </span><u></u><u></u></p>
</div>
</div>
<div>
<div>
<p class="MsoNormal" style="background:white">
<span style="color:rgb(40,40,40)">Hi list,</span><u></u><u></u></p>
<p class="MsoNormal" style="background:white">
<span style="color:rgb(40,40,40)"> </span><u></u><u></u></p>
<p class="MsoNormal" style="background:white">
<span style="color:rgb(40,40,40)">I’m working under CentOS + icehouse.</span><u></u><u></u></p>
<p class="MsoNormal" style="background:white">
<span style="color:rgb(40,40,40)"> </span><u></u><u></u></p>
<p class="MsoNormal" style="background:white">
<span style="color:rgb(40,40,40)">While, I have an non-admin user “demo”, and I can work under this this user with basic operations.</span><u></u><u></u></p>
<p class="MsoNormal" style="background:white">
<span style="color:rgb(40,40,40)">Everything works well.</span><u></u><u></u></p>
<p class="MsoNormal" style="background:white">
<span style="color:rgb(40,40,40)"> </span><u></u><u></u></p>
<p class="MsoNormal" style="background:white">
<span style="color:rgb(40,40,40)">But, I also hope this user can do some admin operations, such as migrate and so on, because currently when I run command:</span><u></u><u></u></p>
<p class="MsoNormal" style="text-indent:0.5in;background:white">
<span style="color:rgb(40,40,40)">nova migrate ${my_instance}</span><u></u><u></u></p>
<p class="MsoNormal" style="background:white">
<span style="color:rgb(40,40,40)">I get output:</span><u></u><u></u></p>
<p class="MsoNormal" style="text-indent:0.5in;background:white">
<span style="color:rgb(40,40,40)">ERROR: Policy doesn't allow compute_extension:admin_actions:migrate to be performed. (HTTP 403) (Request-ID: req-698ad5b5-f1fe-48fc-b81f-a765020bf89f)</span><u></u><u></u></p>
<p class="MsoNormal" style="background:white">
<span style="color:rgb(40,40,40)"> </span><u></u><u></u></p>
<p class="MsoNormal" style="background:white">
<span style="color:rgb(40,40,40)">Anyone can help me ?</span><u></u><u></u></p>
<p class="MsoNormal" style="background:white">
<span style="color:rgb(40,40,40)"> </span><u></u><u></u></p>
<p class="MsoNormal" style="background:white">
<span style="color:rgb(40,40,40)">Thanks.</span><u></u><u></u></p>
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<span style="color:rgb(40,40,40)">-chen</span><u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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