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<div>Hello All,</div>
<div> </div>
<div>This is follow up mail on my y'days mail regarding bug </div>
<div><a href="https://bugs.launchpad.net/python-novaclient/+bug/1667794"><font color="#0563C1"><u>https://bugs.launchpad.net/python-novaclient/+bug/1667794</u></font></a></div>
<div> </div>
<div><span style="background-color:yellow;">It looks like </span><span style="background-color:yellow;">a</span><span style="background-color:yellow;">ll the cli commands that are related to </span></div>
<div><span style="background-color:yellow;"><a href="http://10.141.67.190:8774/v2.1/os-hypervisors/wipro/servers">http://10.141.67.190:8774/v2.1/os-hypervisors/wipro/servers</a> </span><span style="background-color:yellow;"> </span><span style="background-color:yellow;">api</span></div>
<div><span style="background-color:yellow;">are expecting exact match.</span></div>
<div> </div>
<div>Commands which are affected if we change </div>
<div><a href="http://10.141.67.190:8774/v2.1/os-hypervisors/wipro/servers">http://10.141.67.190:8774/v2.1/os-hypervisors/wipro/servers</a> api </div>
<div>from pattern match to exact match are as below : </div>
<div>It’s clearly seen that these commands expect exact match only.</div>
<div> </div>
<div><font size="2"><span style="font-size:9pt;">Servers = True</span></font></div>
<div><font size="2"><span style="font-size:9pt;">==============================================</span></font></div>
<div><font size="2"><span style="font-size:9pt;">1.</span></font></div>
<div><font size="2"><span style="font-size:9pt;">do_host_meta(cs, args):</span></font></div>
<div><font size="2"><span style="font-size:9pt;"> """Set or Delete metadata on all instances of a host."""</span></font></div>
<div><font size="2"><span style="font-size:9pt;"> hypervisors = cs.hypervisors.search(args.host, servers=True)</span></font></div>
<div><font size="2"><span style="font-size:9pt;"> </span></font></div>
<div><font size="2"><span style="font-size:9pt;">2.</span></font></div>
<div><font size="2"><span style="font-size:9pt;">@utils.arg(</span></font></div>
<div><font size="2"><span style="font-size:9pt;"> 'hostname',</span></font></div>
<div><font size="2"><span style="font-size:9pt;"> metavar='<hostname>',</span></font></div>
<div><font size="2"><span style="font-size:9pt;"> help=_('The hypervisor hostname (or pattern) to search for.')) def do_hypervisor_servers(cs, args):</span></font></div>
<div><font size="2"><span style="font-size:9pt;"> """List servers belonging to specific hypervisors."""</span></font></div>
<div><font size="2"><span style="font-size:9pt;"> hypers = cs.hypervisors.search(args.hostname, servers=True)</span></font></div>
<div><font size="2"><span style="font-size:9pt;"> </span></font></div>
<div><font size="2"><span style="font-size:9pt;">3.</span></font></div>
<div><font size="2"><span style="font-size:9pt;">def do_host_evacuate(cs, args):</span></font></div>
<div><font size="2"><span style="font-size:9pt;"> """Evacuate all instances from failed host."""</span></font></div>
<div><font size="2"><span style="font-size:9pt;"> </span></font></div>
<div><font size="2"><span style="font-size:9pt;"> hypervisors = cs.hypervisors.search(args.host, servers=True)</span></font></div>
<div><font size="2"><span style="font-size:9pt;"> </span></font></div>
<div><font size="2"><span style="font-size:9pt;">4.</span></font></div>
<div><font size="2"><span style="font-size:9pt;">def do_host_evacuate_live(cs, args):</span></font></div>
<div><font size="2"><span style="font-size:9pt;"> """Live migrate all instances of the specified host</span></font></div>
<div><font size="2"><span style="font-size:9pt;"> to other available hosts.</span></font></div>
<div><font size="2"><span style="font-size:9pt;"> """</span></font></div>
<div><font size="2"><span style="font-size:9pt;"> hypervisors = cs.hypervisors.search(args.host, servers=True)</span></font></div>
<div><font size="2"><span style="font-size:9pt;"> response = []</span></font></div>
<div><font size="2"><span style="font-size:9pt;"> </span></font></div>
<div><font size="2"><span style="font-size:9pt;">5.</span></font></div>
<div><font size="2"><span style="font-size:9pt;">def do_host_servers_migrate(cs, args):</span></font></div>
<div><font size="2"><span style="font-size:9pt;"> """Cold migrate all instances off the specified host to other available</span></font></div>
<div><font size="2"><span style="font-size:9pt;"> hosts.</span></font></div>
<div><font size="2"><span style="font-size:9pt;"> """</span></font></div>
<div><font size="2"><span style="font-size:9pt;"> </span></font></div>
<div><font size="2"><span style="font-size:9pt;"> hypervisors = cs.hypervisors.search(args.host, servers=True)</span></font></div>
<div><font size="2"><span style="font-size:9pt;"> response = []</span></font></div>
<div><font size="2"><span style="font-size:9pt;"> for hyper in hypervisors:</span></font></div>
<div> </div>
<div>Hence, I am planning to correct/change <a href="http://10.141.67.190:8774/v2.1/os-hypervisors/wipro/servers">
http://10.141.67.190:8774/v2.1/os-hypervisors/wipro/servers</a> api </div>
<div>to match hostname as exact match “NOT” as a pattern.</div>
<div> </div>
<div>Please comment if any other opinion on this.</div>
<div> </div>
<div>Thanks</div>
<div>Nidhi</div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div>-----Original Message-----<br>
From: Nidhi Mittal Hada (Product Engineering Service) <br>
Sent: Tuesday, July 25, 2017 12:42 PM<br>
To: openstack-dev@lists.openstack.org<br>
Cc: 'mriedemos@gmail.com' <mriedemos@gmail.com><br>
Subject: RE: [openstack-dev] [OpenStack-Dev][Nova] - <a href="https://launchpad.net/bugs/1667794">
https://launchpad.net/bugs/1667794</a> Changing hostname not to be treated as a pattern instead exact match will be done.</div>
<div> </div>
<div>Hello Matt,</div>
<div> </div>
<div>Kindly see analysis below and suggest.</div>
<div> </div>
<div>When we execute</div>
<div>stack@ubuntu14-OptiPlex-3020:~/openstack_install/devstack$ nova --debug host-evacuate wipro .</div>
<div>.</div>
<div>.</div>
<div>DEBUG (session:347) REQ: curl -g -i -X GET <a href="http://10.141.67.190:8774/v2.1/os-hypervisors/wipro/servers">http://10.141.67.190:8774/v2.1/os-hypervisors/wipro/servers</a> -H "OpenStack-API-Version: compute 2.46" -H "User-Agent: python-novaclient"
-H "Accept: application/json" -H "X-OpenStack-Nova-API-Version: 2.46" -H "X-Auth-Token: {SHA1}9e9230a54eff2444ac32fa054c6bab3dbe446df9" >>>>>>>>>>>>>>>>>>>>>>>>>></div>
<div> </div>
<div>nova api that's being called is this</div>
<div><a href="https://developer.openstack.org/api-ref/compute/?expanded=search-hypervisor-detail,list-hypervisor-servers-detail#list-hypervisor-servers">https://developer.openstack.org/api-ref/compute/?expanded=search-hypervisor-detail,list-hypervisor-servers-detail#list-hypervisor-servers</a></div>
<div>Where it clearly states: "List all servers belong to each hypervisor whose host name is matching a given hypervisor host name or portion of it."</div>
<div> </div>
<div> </div>
<div>Another available api for hostname match is <a href="https://developer.openstack.org/api-ref/compute/?expanded=search-hypervisor-detail,list-hypervisor-servers-detail#search-hypervisor">https://developer.openstack.org/api-ref/compute/?expanded=search-hypervisor-detail,list-hypervisor-servers-detail#search-hypervisor</a></div>
<div>which states: "Search hypervisor by a given hypervisor host name or portion of it."</div>
<div> </div>
<div>There is no api available at present where hostname is matched not as a pattern. PCMIIW.</div>
<div> </div>
<div>Hence it can't be just fixed in client as it is.</div>
<div> </div>
<div>Solution: I thought we can fix it by changing only <a href="http://10.141.67.190:8774/v2.1/os-hypervisors/wipro/servers">http://10.141.67.190:8774/v2.1/os-hypervisors/wipro/servers</a> api to match hostname as exact so that <a href="https://developer.openstack.org/api-ref/compute/?expanded=search-hypervisor-detail,list-hypervisor-servers-detail#search-hypervisor">https://developer.openstack.org/api-ref/compute/?expanded=search-hypervisor-detail,list-hypervisor-servers-detail#search-hypervisor</a>
remains unaffected.</div>
<div>This I still have to change in nova server code, I will use an additional function parameter to specify if exact match is desired or a pattern match is desired.</div>
<div> </div>
<div>But then <a href="http://10.141.67.190:8774/v2.1/os-hypervisors/wipro/servers">http://10.141.67.190:8774/v2.1/os-hypervisors/wipro/servers</a> is being used by many other commands than just host-evacuate.</div>
<div>Which all will be affected.</div>
<div> </div>
<div>Listing commands that will be affected are .</div>
<div> </div>
<div>Function in novaclient from where we call api </div>
<div> def search(self, hypervisor_match, servers=False): >>>>>>>>>>>>>>.servers is False by default</div>
<div> """</div>
<div> Get a list of matching hypervisors.</div>
<div> :param servers: If True, server information is also retrieved.</div>
<div> """</div>
<div> target = 'servers' if servers else 'search'</div>
<div> url = ('/os-hypervisors/%s/%s' %</div>
<div> (parse.quote(hypervisor_match, safe=''), target)) >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>.</div>
<div> return self._list(url, 'hypervisors')</div>
<div> </div>
<div>we are passing servers as true in these cli commands.</div>
<div> </div>
<div>Servers = True</div>
<div>==============================================</div>
<div>1.</div>
<div>do_host_meta(cs, args):</div>
<div> """Set or Delete metadata on all instances of a host."""</div>
<div> hypervisors = cs.hypervisors.search(args.host, servers=True)</div>
<div> </div>
<div>2.</div>
<div>@utils.arg(</div>
<div> 'hostname',</div>
<div> metavar='<hostname>',</div>
<div> help=_('The hypervisor hostname (or pattern) to search for.')) def do_hypervisor_servers(cs, args):</div>
<div> """List servers belonging to specific hypervisors."""</div>
<div> hypers = cs.hypervisors.search(args.hostname, servers=True)</div>
<div> </div>
<div>3.</div>
<div>def do_host_evacuate(cs, args):</div>
<div> """Evacuate all instances from failed host."""</div>
<div> </div>
<div> hypervisors = cs.hypervisors.search(args.host, servers=True)</div>
<div> </div>
<div>4.</div>
<div>def do_host_evacuate_live(cs, args):</div>
<div> """Live migrate all instances of the specified host</div>
<div> to other available hosts.</div>
<div> """</div>
<div> hypervisors = cs.hypervisors.search(args.host, servers=True)</div>
<div> response = []</div>
<div> </div>
<div>5.</div>
<div>def do_host_servers_migrate(cs, args):</div>
<div> """Cold migrate all instances off the specified host to other available</div>
<div> hosts.</div>
<div> """</div>
<div> </div>
<div> hypervisors = cs.hypervisors.search(args.host, servers=True)</div>
<div> response = []</div>
<div> for hyper in hypervisors:</div>
<div> </div>
<div> </div>
<div>Servers = false</div>
<div>===============</div>
<div>1.</div>
<div>def _do_hypervisor_list(cs, matching=None, limit=None, marker=None):</div>
<div> columns = ['ID', 'Hypervisor hostname', 'State', 'Status']</div>
<div> if matching:</div>
<div> utils.print_list(cs.hypervisors.search(matching), columns)</div>
<div> </div>
<div> </div>
<div> </div>
<div>Please suggest what is better solution?</div>
<div> </div>
<div>1)Modifying <a href="http://10.141.67.190:8774/v2.1/os-hypervisors/wipro/servers">http://10.141.67.190:8774/v2.1/os-hypervisors/wipro/servers</a> api code in nova server side code - to match hostname as exact not as a pattern</div>
<div>We can code so that <a href="http://10.141.67.190:8774/v2.1/os-hypervisors/wipro/search">http://10.141.67.190:8774/v2.1/os-hypervisors/wipro/search</a> remains unaffected.</div>
<div> </div>
<div>2)We should introduce a new parameter in servers api which from cli which directs that exact match is to be </div>
<div>done in url.</div>
<div><a href="http://10.141.67.190:8774/v2.1/os-hypervisors/wipro/servers?exact_match=true">http://10.141.67.190:8774/v2.1/os-hypervisors/wipro/servers?exact_match=true</a></div>
<div>and query parameter then interpreted in server side code and behave as desired.</div>
<div>In this case we will have choice to not affect at undesired commands.</div>
<div> </div>
<div>Thanks</div>
<div>Nidhi</div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div>-----Original Message-----</div>
<div>From: Matt Riedemann [<a href="mailto:mriedemos@gmail.com">mailto:mriedemos@gmail.com</a>] </div>
<div>Sent: Friday, July 14, 2017 7:22 PM</div>
<div>To: <a href="mailto:openstack-dev@lists.openstack.org">openstack-dev@lists.openstack.org</a></div>
<div>Subject: Re: [openstack-dev] [OpenStack-Dev][Nova] - <a href="https://launchpad.net/bugs/1667794">https://launchpad.net/bugs/1667794</a> Changing hostname not to be treated as a pattern instead exact match will be done.</div>
<div> </div>
<div>** This mail has been sent from an external source. Treat hyperlinks and attachments in this email with caution**</div>
<div> </div>
<div>On 7/14/2017 6:49 AM, <a href="mailto:nidhi.hada@wipro.com">nidhi.hada@wipro.com</a> wrote:</div>
<div>> Hello all,</div>
<div>></div>
<div>> This is regarding bug 1667794 as mentioned in subject.</div>
<div>></div>
<div>> Its review is going on here.</div>
<div>></div>
<div>> <a href="https://clicktime.symantec.com/a/1/49nJvSe1Be7H66fNyloEH0VFJQ88tUzr9ao">https://clicktime.symantec.com/a/1/49nJvSe1Be7H66fNyloEH0VFJQ88tUzr9ao</a></div>
<div>> 8kyFM3jc=?d=huhMONMwyIvPyR_TNVFVFEoKBc2izoSPlzhtdZ1egR7bwY3hW0n6gBw5Pf</div>
<div>> _aKziBo_pOhFqtNZ7hwc696PKDDY0ern8LIG6XT0Pa5GnYDhIM8xtNkatqd6_xu-fn6091</div>
<div>> KREiE5rxafexQfe-rJ7RZKU7RWnI0BMsnrkU7NWqJOLUlJi9hKN2qxzIp-n8ZnSkjcNzp9</div>
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<div>> RCzrptg5Fi9_L4e2YX6ZA28AUqup5WAH1B4OT_E4mbfcaZxfm9sIXtUyWvbaKBRG-syj4W</div>
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<div>> hsiX0HknkBnNqR21E7Fb5t2hG0HjqNSxgld9NIXGZng7JR&u=https%3A%2F%2Freview.</div>
<div>> openstack.org%2F%23%2Fc%2F474949%2F</div>
<div>></div>
<div>> *_Bug is - _**_Nova treats hostname as pattern_*</div>
<div>></div>
<div>> *_Description_*</div>
<div>></div>
<div>> Nova commands such as "hypervisor-list --matching <substring>",</div>
<div>></div>
<div>> host-evacuate-live and host-evacuate and few more, treat the</div>
<div>></div>
<div>> user-specified "host-name" as the input to the HTTP</div>
<div>></div>
<div>> /os-hypervisors/{hypervisor_hostname_pattern}/search API.</div>
<div>></div>
<div>> *Nova checks "host-name" as a pattern instead of exact match,*</div>
<div>></div>
<div>> *which causes problem with some commands such as*</div>
<div>></div>
<div>> *nova host-evacuate-live compute-1 where in host-evacuate*</div>
<div>></div>
<div>> *action will apply to all "compute-1", "compute-10".*</div>
<div>></div>
<div>> *That is not right.*</div>
<div>></div>
<div>> Correcting it by using exact match.</div>
<div>></div>
<div>> We have fixed it and put it for review. We need your opinion on this.</div>
<div>></div>
<div>> *_Kindly share your opinion in case this does not seem to be an </div>
<div>> acceptable fix to anyone._*</div>
<div>></div>
<div>> Thanks</div>
<div>></div>
<div>> Nidhi</div>
<div>></div>
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<div>> <a href="https://clicktime.symantec.com/a/1/9RX_Q306kvu_hhDcIzBL0WNsDUY3rwoCi9T">https://clicktime.symantec.com/a/1/9RX_Q306kvu_hhDcIzBL0WNsDUY3rwoCi9T</a></div>
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<div>> hsiX0HknkBnNqR21E7Fb5t2hG0HjqNSxgld9NIXGZng7JR&u=http%3A%2F%2Flists.op</div>
<div>> enstack.org%2Fcgi-bin%2Fmailman%2Flistinfo%2Fopenstack-dev</div>
<div>></div>
<div> </div>
<div>Thanks for bringing this up. Your fix is in the wrong place, see the comments in the patch.</div>
<div> </div>
<div>--</div>
<div> </div>
<div>Thanks,</div>
<div> </div>
<div>Matt</div>
<div> </div>
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