<div>Thanks gong,</div><div><br></div><div>I also noticed that, what is wisdom behind this "delay update"?</div><div><br></div><div>I encountered a problem in current openstack. After I installed openstack with devstack with "multi_host=1", I found newly started instance can not get a fix ip from dhcp server, since nova-br100.conf didn't hold the related information. but when I start the second instance, at this point the mac/fix_ip information for the first instance will then be written to nova-br100.conf and the first instance work well.</div>
<div><br></div><div>my guest for this problem is like this:</div><div>(1)nova-scheduler did not update the "host" field in database, </div><div>(2)so nova-network cann't get the mac/ip information, so nova-br100.conf is empty and instance can not get its fix ip.</div>
<div> related code: nova/network/linux_net.py</div><div> def get_dhcp_hosts(context, network_ref):</div><div> """Get network's hosts config in dhcp-host format."""</div><div> hosts = []</div>
<div> host = None</div><div> if network_ref['multi_host']:</div><div> host = FLAGS.host</div><div> #pdb.set_trace()</div><div> <span style="background-color:rgb(255,255,0)"> for data in db.network_get_associated_fixed_ips(context,</span></div>
<div><span style="background-color:rgb(255,255,0)"> network_ref['id'],</span></div><div><span style="background-color:rgb(255,255,0)"> <font color="#ff0000">host=host</font>):</span></div>
<div><span style="background-color:rgb(255,255,0)"> hosts.append(_host_dhcp(data))</span></div><div> return '\n'.join(hosts)</div><div><br></div><div>(3)the second instance is started, at this time, the "host" field for first instance is already updated by <span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">self.compute_rpcapi.run_</span><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">instance.</span></div>
<div><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">(4)nova-network get the mac/ip information correctly and dump to nova-br100.conf, so the first instance can get its fix ip. </span></div>
<div><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)"><br></span></div><div><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">any comments??</span></div>
<div><br></div><br clear="all">-----------------------------------------------------------------<br>韦远科 <div>中国科学院 计算机网络信息中心</div><div>北京市海淀区中关村南四街四号 349信箱(100190)</div><div style="text-align:-webkit-left"><font color="#4b4b4b" face="����"><span style="font-size:14px;line-height:24px"><br>
</span></font></div><div>Yuanke Wei (Wei)</div><div>Computer Network Information Center,Chinese Academy of Sciences</div><div>4 Zhongguancun Nansijie, Haidian District, Beijing 100190, China</div><div>P.O. Box 349</div><div>
gtalk: <a href="mailto:weiyuanke123@gmail.com" target="_blank">weiyuanke123@gmail.com</a></div><div><div>msn: <a href="mailto:weiyuanke123@hotmail.com" target="_blank">weiyuanke123@hotmail.com</a></div></div><br>
<br><br><div class="gmail_quote">On Fri, Oct 12, 2012 at 10:14 AM, gong yong sheng <span dir="ltr"><<a href="mailto:gongysh@linux.vnet.ibm.com" target="_blank">gongysh@linux.vnet.ibm.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<div>read on:<br>
we will send the host to compute manager:<div class="im"><br>
<br>
def _provision_resource(self, context, weighted_host,
request_spec,<br>
filter_properties, requested_networks, injected_files,<br>
admin_password, is_first_time, instance_uuid=None):<br>
"""Create the requested resource in this Zone."""<br>
# Add a retry entry for the selected compute host:<br>
self._add_retry_host(filter_properties,
weighted_host.host_state.host)<br>
<br>
self._add_oversubscription_policy(filter_properties,<br>
weighted_host.host_state)<br>
<br>
payload = dict(request_spec=request_spec,<br>
weighted_host=weighted_host.to_dict(),<br>
instance_id=instance_uuid)<br>
notifier.notify(context,
notifier.publisher_id("scheduler"),<br>
'scheduler.run_instance.scheduled',
notifier.INFO,<br>
payload)<br>
<br>
updated_instance = driver.instance_update_db(context,
instance_uuid)<br>
<br></div>
self.compute_rpcapi.run_instance(context,
instance=updated_instance,<br>
host=weighted_host.host_state.host,<br>
request_spec=request_spec,
filter_properties=filter_properties,<br>
requested_networks=requested_networks,<br>
injected_files=injected_files,<br>
admin_password=admin_password,
is_first_time=is_first_time)<div><div class="h5"><br>
On 10/12/2012 09:54 AM, 韦远科 wrote:<br>
</div></div></div>
<blockquote type="cite"><div><div class="h5">
<div>hi,</div>
<div><br>
</div>
<div>I read the following code in nova scheduler and have some
questions with the code marked in yellow.</div>
<div>the following code can be found at "<a href="https://github.com/openstack/nova/blob/master/nova/scheduler/filter_scheduler.py" target="_blank">https://github.com/openstack/nova/blob/master/nova/scheduler/filter_scheduler.py</a>"</div>
<div><br>
</div>
<div>
<pre style="margin-top:0px;margin-bottom:0px;padding:0px;border:0px"><div style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Courier,monospace;font-size:12px;line-height:16px;margin:0px;padding:0px 0px 0px 10px;border:0px">
<span style="margin:0px;padding:0px;border:0px;font-weight:bold">def</span> <span style="margin:0px;padding:0px;border:0px;color:rgb(153,0,0);font-weight:bold">_provision_resource</span><span style="margin:0px;padding:0px;border:0px">(</span><span style="margin:0px;padding:0px;border:0px;color:rgb(153,153,153)">self</span><span style="margin:0px;padding:0px;border:0px">,</span> <span style="margin:0px;padding:0px;border:0px">context</span><span style="margin:0px;padding:0px;border:0px">,</span> <span style="margin:0px;padding:0px;border:0px">weighted_host</span><span style="margin:0px;padding:0px;border:0px">,</span> <span style="margin:0px;padding:0px;border:0px">request_spec</span><span style="margin:0px;padding:0px;border:0px">,</span></div>
<div style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Courier,monospace;font-size:12px;line-height:16px;margin:0px;padding:0px 0px 0px 10px;border:0px"> <span style="margin:0px;padding:0px;border:0px">filter_properties</span><span style="margin:0px;padding:0px;border:0px">,</span> <span style="margin:0px;padding:0px;border:0px">requested_networks</span><span style="margin:0px;padding:0px;border:0px">,</span> <span style="margin:0px;padding:0px;border:0px">injected_files</span><span style="margin:0px;padding:0px;border:0px">,</span></div>
<div style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Courier,monospace;font-size:12px;line-height:16px;margin:0px;padding:0px 0px 0px 10px;border:0px"> <span style="margin:0px;padding:0px;border:0px">admin_password</span><span style="margin:0px;padding:0px;border:0px">,</span> <span style="margin:0px;padding:0px;border:0px">is_first_time</span><span style="margin:0px;padding:0px;border:0px">,</span> <span style="margin:0px;padding:0px;border:0px">instance_uuid</span><span style="margin:0px;padding:0px;border:0px;font-weight:bold">=</span><span style="margin:0px;padding:0px;border:0px;color:rgb(153,153,153)">None</span><span style="margin:0px;padding:0px;border:0px">):</span></div>
<div style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Courier,monospace;font-size:12px;line-height:16px;margin:0px;padding:0px 0px 0px 10px;border:0px"> <span style="margin:0px;padding:0px;border:0px;color:rgb(221,17,68)">"""Create the requested resource in this Zone."""</span></div>
<div style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Courier,monospace;font-size:12px;line-height:16px;margin:0px;padding:0px 0px 0px 10px;border:0px"> <span style="margin:0px;padding:0px;border:0px;color:rgb(153,153,136);font-style:italic"># Add a retry entry for the selected compute host:</span></div>
<div style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Courier,monospace;font-size:12px;line-height:16px;margin:0px;padding:0px 0px 0px 10px;border:0px"> <span style="margin:0px;padding:0px;border:0px;color:rgb(153,153,153)">self</span><span style="margin:0px;padding:0px;border:0px;font-weight:bold">.</span><span style="margin:0px;padding:0px;border:0px">_add_retry_host</span><span style="margin:0px;padding:0px;border:0px">(</span><span style="margin:0px;padding:0px;border:0px">filter_properties</span><span style="margin:0px;padding:0px;border:0px">,</span> <span style="margin:0px;padding:0px;border:0px">weighted_host</span><span style="margin:0px;padding:0px;border:0px;font-weight:bold">.</span><span style="margin:0px;padding:0px;border:0px">host_state</span><span>.</span>
<span style="margin:0px;padding:0px;border:0px">host</span><span style="margin:0px;padding:0px;border:0px">)</span></div>
<div style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Courier,monospace;font-size:12px;line-height:16px;margin:0px;padding:0px 0px 0px 10px;border:0px">
</div><div style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Courier,monospace;font-size:12px;line-height:16px;margin:0px;padding:0px 0px 0px 10px;border:0px">
<span style="margin:0px;padding:0px;border:0px;color:rgb(153,153,153)">self</span><span style="margin:0px;padding:0px;border:0px;font-weight:bold">.</span><span style="margin:0px;padding:0px;border:0px">_add_oversubscription_policy</span><span style="margin:0px;padding:0px;border:0px">(</span><span style="margin:0px;padding:0px;border:0px">filter_properties</span><span style="margin:0px;padding:0px;border:0px">,</span></div>
<div style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Courier,monospace;font-size:12px;line-height:16px;margin:0px;padding:0px 0px 0px 10px;border:0px"> <span style="margin:0px;padding:0px;border:0px">weighted_host</span><span style="margin:0px;padding:0px;border:0px;font-weight:bold">.</span><span style="margin:0px;padding:0px;border:0px">host_state</span><span style="margin:0px;padding:0px;border:0px">)</span></div>
<div style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Courier,monospace;font-size:12px;line-height:16px;margin:0px;padding:0px 0px 0px 10px;border:0px">
</div><div style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Courier,monospace;font-size:12px;line-height:16px;margin:0px;padding:0px 0px 0px 10px;border:0px">
<span style="margin:0px;padding:0px;border:0px">payload</span> <span style="margin:0px;padding:0px;border:0px;font-weight:bold">=</span> <span style="margin:0px;padding:0px;border:0px;color:rgb(0,134,179)">dict</span><span style="margin:0px;padding:0px;border:0px">(</span><span style="margin:0px;padding:0px;border:0px">request_spec</span><span style="margin:0px;padding:0px;border:0px;font-weight:bold">=</span><span style="margin:0px;padding:0px;border:0px">request_spec</span><span style="margin:0px;padding:0px;border:0px">,</span></div>
<div style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Courier,monospace;font-size:12px;line-height:16px;margin:0px;padding:0px 0px 0px 10px;border:0px"> <span style="margin:0px;padding:0px;border:0px">weighted_host</span><span style="margin:0px;padding:0px;border:0px;font-weight:bold">=</span><span style="margin:0px;padding:0px;border:0px">weighted_host</span><span style="margin:0px;padding:0px;border:0px;font-weight:bold">.</span><span style="margin:0px;padding:0px;border:0px">to_dict</span><span style="margin:0px;padding:0px;border:0px">(),</span></div>
<div style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Courier,monospace;font-size:12px;line-height:16px;margin:0px;padding:0px 0px 0px 10px;border:0px"> <span style="margin:0px;padding:0px;border:0px">instance_id</span><span style="margin:0px;padding:0px;border:0px;font-weight:bold">=</span><span style="margin:0px;padding:0px;border:0px">instance_uuid</span><span style="margin:0px;padding:0px;border:0px">)</span></div>
<div style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Courier,monospace;font-size:12px;line-height:16px;margin:0px;padding:0px 0px 0px 10px;border:0px"> <span style="margin:0px;padding:0px;border:0px">notifier</span><span style="margin:0px;padding:0px;border:0px;font-weight:bold">.</span><span style="margin:0px;padding:0px;border:0px">notify</span><span style="margin:0px;padding:0px;border:0px">(</span><span style="margin:0px;padding:0px;border:0px">context</span><span style="margin:0px;padding:0px;border:0px">,</span> <span style="margin:0px;padding:0px;border:0px">notifier</span><span style="margin:0px;padding:0px;border:0px;font-weight:bold">.</span><span style="margin:0px;padding:0px;border:0px">publisher_id</span><span style="margin:0px;padding:0px;border:0px">(</span><span>"scheduler"</span><span style="margin:0px;padding:0px;border:0px">),</span></div>
<div style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Courier,monospace;font-size:12px;line-height:16px;margin:0px;padding:0px 0px 0px 10px;border:0px"> <span style="margin:0px;padding:0px;border:0px;color:rgb(221,17,68)">'scheduler.run_instance.scheduled'</span><span style="margin:0px;padding:0px;border:0px">,</span> <span style="margin:0px;padding:0px;border:0px">notifier</span><span style="margin:0px;padding:0px;border:0px;font-weight:bold">.</span><span style="margin:0px;padding:0px;border:0px">INFO</span><span style="margin:0px;padding:0px;border:0px">,</span></div>
<div style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Courier,monospace;font-size:12px;line-height:16px;margin:0px;padding:0px 0px 0px 10px;border:0px"> <span style="margin:0px;padding:0px;border:0px">payload</span><span style="margin:0px;padding:0px;border:0px">)</span></div>
<div style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Courier,monospace;font-size:12px;line-height:16px;margin:0px;padding:0px 0px 0px 10px;border:0px">
</div><div style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Courier,monospace;font-size:12px;line-height:16px;margin:0px;padding:0px 0px 0px 10px;border:0px">
<span style="background-color:rgb(255,255,0)"><span style="margin:0px;padding:0px;border:0px">updated_instance</span> <span style="margin:0px;padding:0px;border:0px;font-weight:bold">=</span> <span style="margin:0px;padding:0px;border:0px">driver</span><span style="margin:0px;padding:0px;border:0px;font-weight:bold">.</span><span style="margin:0px;padding:0px;border:0px">instance_update_db</span><span style="margin:0px;padding:0px;border:0px">(</span><span style="margin:0px;padding:0px;border:0px">context</span><span style="margin:0px;padding:0px;border:0px">,</span> <span style="margin:0px;padding:0px;border:0px">instance_uuid</span><span style="margin:0px;padding:0px;border:0px">)</span></span></div>
<div style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Courier,monospace;font-size:12px;line-height:16px;margin:0px;padding:0px 0px 0px 10px;border:0px"><span style> </span><span style="background-color:rgb(255,255,0)">#at this point, we already know the host which will provision the instance, that is recorded in variable <i>weighted_host.</i></span></div>
<div style="margin:0px;padding:0px 0px 0px 10px;border:0px"><span style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Courier,monospace;font-size:12px;line-height:16px;background-color:rgb(255,255,0)"><i> </i>But actually, the <i>instance_update_db</i> function only update "</span><font face="Consolas, Liberation Mono, Courier, monospace"><span style="font-size:12px;line-height:16px"><font color="#333333">values = {</font><font color="#ff0000">'host': None</font><font color="#333333">, 'scheduled_at': now}</font></span></font><span style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Courier,monospace;font-size:12px;line-height:16px;background-color:rgb(255,255,0)">" in database,</span></div>
<div style="margin:0px;padding:0px 0px 0px 10px;border:0px"><span style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Courier,monospace;font-size:12px;line-height:16px;background-color:rgb(255,255,0)"> So why????</span></div>
<div style="margin:0px;padding:0px 0px 0px 10px;border:0px"><span style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Courier,monospace;font-size:12px;line-height:16px;background-color:rgb(255,255,0)">
</span></div><div style="margin:0px;padding:0px 0px 0px 10px;border:0px"><span style="line-height:16px;color:rgb(51,51,51);font-size:12px;font-family:Consolas,'Liberation Mono',Courier,monospace"> </span></div>
<div style="margin:0px;padding:0px 0px 0px 10px;border:0px"><span style="line-height:16px;font-size:12px;font-family:Consolas,'Liberation Mono',Courier,monospace"><font color="#ffffff"> </font>can someone give me some help? thanks very much!</span></div>
<div style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Courier,monospace;font-size:12px;line-height:16px;margin:0px;padding:0px 0px 0px 10px;border:0px">
</div><div style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Courier,monospace;font-size:12px;line-height:16px;margin:0px;padding:0px 0px 0px 10px;border:0px">
</div></pre>
</div>
-----------------------------------------------------------------<br>
韦远科
<div>中国科学院 计算机网络信息中心</div>
<div>北京市海淀区中关村南四街四号 349信箱(100190)</div>
<div style="text-align:-webkit-left"><font face="����" color="#4b4b4b"><span style="font-size:14px;line-height:24px"><br>
</span></font></div>
<div>Yuanke Wei (Wei)</div>
<div>Computer Network Information Center,Chinese Academy of
Sciences</div>
<div>4 Zhongguancun Nansijie, Haidian District, Beijing 100190,
China</div>
<div>P.O. Box 349</div>
<div>
gtalk: <a href="mailto:weiyuanke123@gmail.com" target="_blank">weiyuanke123@gmail.com</a></div>
<div>
<div>msn: <a href="mailto:weiyuanke123@hotmail.com" target="_blank">weiyuanke123@hotmail.com</a></div>
</div>
<br>
<br>
<fieldset></fieldset>
<br>
</div></div><pre>_______________________________________________
Mailing list: <a href="https://launchpad.net/~openstack" target="_blank">https://launchpad.net/~openstack</a>
Post to : <a href="mailto:openstack@lists.launchpad.net" target="_blank">openstack@lists.launchpad.net</a>
Unsubscribe : <a href="https://launchpad.net/~openstack" target="_blank">https://launchpad.net/~openstack</a>
More help : <a href="https://help.launchpad.net/ListHelp" target="_blank">https://help.launchpad.net/ListHelp</a>
</pre>
</blockquote>
<br>
</div>
</blockquote></div><br>