Re: [openstack-dev] [OpenStack][Nova][Scheduler] Promote select_destination as a REST API
Maybe we can implement this goal by another way, adding new API 'confirm_before_migration' that's similar with 'confirm_resize'. This also can resolve Chris Friesen's concern. On 2014年07月23日 00:13, Jay Pipes wrote: On 07/21/2014 11:16 PM, Jay Lau wrote: Hi Jay, There are indeed some China customers want this feature because before they do some operations, they want to check the action plan, such as where the VM will be migrated or created, they want to use some interactive mode do some operations to make sure no errors. This isn't something that normal tenants should have access to, IMO. The scheduler is not like a database optimizer that should give you a query plan for a SQL statement. The information the scheduler is acting on (compute node usage records, aggregate records, deployment configuration, etc) are absolutely NOT something that should be exposed to end-users. I would certainly support a specification that intended to add detailed log message output from the scheduler that recorded how it made its decisions, so that an operator could evaluate the data and decision, but I'm not in favour of exposing this information via a tenant-facing API. Best, -jay 2014-07-22 10:23 GMT+08:00 Jay Pipes jaypi...@gmail.com mailto:jaypi...@gmail.com: On 07/21/2014 07:45 PM, Jay Lau wrote: There is one requirement that some customers want to get the possible host list when create/rebuild/migrate/__evacuate VM so as to create a resource plan for those operations, but currently select_destination is not a REST API, is it possible that we promote this API to be a REST API? Which customers want to get the possible host list? /me imagines someone asking Amazon for a REST API that returned all the possible servers that might be picked for placement... and what answer Amazon might give to the request. If by customer, you are referring to something like IBM Smart Cloud Orchestrator, then I don't really see the point of supporting something like this. Such a customer would only need to create a resource plan for those operations if it was wholly supplanting large pieces of OpenStack infrastructure, including parts of Nova and much of Heat. Best, -jay _ OpenStack-dev mailing list OpenStack-dev@lists.openstack.__org mailto:OpenStack-dev@lists.openstack.org http://lists.openstack.org/__cgi-bin/mailman/listinfo/__openstack-dev http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev -- Thanks, Jay ___ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev ___ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev ___ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
Re: [openstack-dev] [OpenStack][Nova][Scheduler] Promote select_destination as a REST API
Thanks Alex and Jay Pipes. @Alex, I want a common interface for all VM operations to get target host list, seems only adding a new API 'confirm_before_migration' not enough to handle this? ;-) @Jay Pipes, I will try to see if we can export this in K or L via Gantt Thanks. 2014-07-23 17:14 GMT+08:00 Alex Xu x...@linux.vnet.ibm.com: Maybe we can implement this goal by another way, adding new API 'confirm_before_migration' that's similar with 'confirm_resize'. This also can resolve Chris Friesen's concern. On 2014年07月23日 00:13, Jay Pipes wrote: On 07/21/2014 11:16 PM, Jay Lau wrote: Hi Jay, There are indeed some China customers want this feature because before they do some operations, they want to check the action plan, such as where the VM will be migrated or created, they want to use some interactive mode do some operations to make sure no errors. This isn't something that normal tenants should have access to, IMO. The scheduler is not like a database optimizer that should give you a query plan for a SQL statement. The information the scheduler is acting on (compute node usage records, aggregate records, deployment configuration, etc) are absolutely NOT something that should be exposed to end-users. I would certainly support a specification that intended to add detailed log message output from the scheduler that recorded how it made its decisions, so that an operator could evaluate the data and decision, but I'm not in favour of exposing this information via a tenant-facing API. Best, -jay 2014-07-22 10:23 GMT+08:00 Jay Pipes jaypi...@gmail.com mailto:jaypi...@gmail.com: On 07/21/2014 07:45 PM, Jay Lau wrote: There is one requirement that some customers want to get the possible host list when create/rebuild/migrate/__evacuate VM so as to create a resource plan for those operations, but currently select_destination is not a REST API, is it possible that we promote this API to be a REST API? Which customers want to get the possible host list? /me imagines someone asking Amazon for a REST API that returned all the possible servers that might be picked for placement... and what answer Amazon might give to the request. If by customer, you are referring to something like IBM Smart Cloud Orchestrator, then I don't really see the point of supporting something like this. Such a customer would only need to create a resource plan for those operations if it was wholly supplanting large pieces of OpenStack infrastructure, including parts of Nova and much of Heat. Best, -jay _ OpenStack-dev mailing list OpenStack-dev@lists.openstack.__org mailto:OpenStack-dev@lists.openstack.org http://lists.openstack.org/__cgi-bin/mailman/listinfo/__openstack-dev http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev -- Thanks, Jay ___ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev ___ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev ___ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev -- Thanks, Jay ___ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
Re: [openstack-dev] [OpenStack][Nova][Scheduler] Promote select_destination as a REST API
On 07/21/2014 11:16 PM, Jay Lau wrote: Hi Jay, There are indeed some China customers want this feature because before they do some operations, they want to check the action plan, such as where the VM will be migrated or created, they want to use some interactive mode do some operations to make sure no errors. This isn't something that normal tenants should have access to, IMO. The scheduler is not like a database optimizer that should give you a query plan for a SQL statement. The information the scheduler is acting on (compute node usage records, aggregate records, deployment configuration, etc) are absolutely NOT something that should be exposed to end-users. I would certainly support a specification that intended to add detailed log message output from the scheduler that recorded how it made its decisions, so that an operator could evaluate the data and decision, but I'm not in favour of exposing this information via a tenant-facing API. Best, -jay 2014-07-22 10:23 GMT+08:00 Jay Pipes jaypi...@gmail.com mailto:jaypi...@gmail.com: On 07/21/2014 07:45 PM, Jay Lau wrote: There is one requirement that some customers want to get the possible host list when create/rebuild/migrate/__evacuate VM so as to create a resource plan for those operations, but currently select_destination is not a REST API, is it possible that we promote this API to be a REST API? Which customers want to get the possible host list? /me imagines someone asking Amazon for a REST API that returned all the possible servers that might be picked for placement... and what answer Amazon might give to the request. If by customer, you are referring to something like IBM Smart Cloud Orchestrator, then I don't really see the point of supporting something like this. Such a customer would only need to create a resource plan for those operations if it was wholly supplanting large pieces of OpenStack infrastructure, including parts of Nova and much of Heat. Best, -jay _ OpenStack-dev mailing list OpenStack-dev@lists.openstack.__org mailto:OpenStack-dev@lists.openstack.org http://lists.openstack.org/__cgi-bin/mailman/listinfo/__openstack-dev http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev -- Thanks, Jay ___ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev ___ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
Re: [openstack-dev] [OpenStack][Nova][Scheduler] Promote select_destination as a REST API
Sorry, correct one typo. I mean Promote select_destination as a REST API 2014-07-21 23:49 GMT+08:00 Jay Lau jay.lau@gmail.com: Now in OpenStack Nova, select_destination is used by create/rebuild/migrate/evacuate VM when selecting target host for those operations. There is one requirement that some customers want to get the possible host list when create/rebuild/migrate/evacuate VM so as to create a resource plan for those operations, but currently select_destination is not a REST API, is it possible that we promote this API to be a REST API? -- Thanks, Jay -- Thanks, Jay ___ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
Re: [openstack-dev] [OpenStack][Nova][Scheduler] Promote select_destination as a REST API
On 07/21/2014 09:52 AM, Jay Lau wrote: Sorry, correct one typo. I mean Promote select_destination as a REST API 2014-07-21 23:49 GMT+08:00 Jay Lau jay.lau@gmail.com mailto:jay.lau@gmail.com: Now in OpenStack Nova, select_destination is used by create/rebuild/migrate/evacuate VM when selecting target host for those operations. There is one requirement that some customers want to get the possible host list when create/rebuild/migrate/evacuate VM so as to create a resource plan for those operations, but currently select_destination is not a REST API, is it possible that we promote this API to be a REST API? How would that work, given that when they go to actually perform the operation the conditions may have changed and the selected destination may be different? Or is the idea that they would do a select_destination call, and then call the create/rebuild/migrate/evacuate while specifying the selected destination? Chris ___ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
Re: [openstack-dev] [OpenStack][Nova][Scheduler] Promote select_destination as a REST API
Le 21/07/2014 17:52, Jay Lau a écrit : Sorry, correct one typo. I mean Promote select_destination as a REST API -1 to it. During last Summit, we agreed on externalizing current Scheduler code into a separate project called Gantt. For that, we agreed on first doing necessary changes within the Scheduler before recreating a new repository. By providing select_destinations as a new API endpoint, it would create a disruptive change where the Scheduler would have a new entrypoint. As this change would need a spec anyway and as there is a Spec Freeze now for Juno, I propose to delay this proposal until Gantt is created and propose a REST API for Gantt instead (in Kilo or L) -Sylvain 2014-07-21 23:49 GMT+08:00 Jay Lau jay.lau@gmail.com mailto:jay.lau@gmail.com: Now in OpenStack Nova, select_destination is used by create/rebuild/migrate/evacuate VM when selecting target host for those operations. There is one requirement that some customers want to get the possible host list when create/rebuild/migrate/evacuate VM so as to create a resource plan for those operations, but currently select_destination is not a REST API, is it possible that we promote this API to be a REST API? -- Thanks, Jay -- Thanks, Jay ___ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev ___ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
Re: [openstack-dev] [OpenStack][Nova][Scheduler] Promote select_destination as a REST API
Thanks Chris and Sylvain. @Chris, yes,my case is do a select_destination call, and then call the create/rebuild/migrate/evacuate while specifying the selected destination @Sylvain, I was also thinking of Gantt, but as you said, Gantt might be available in K or L which might be a bit late, that's why I say I want to first do it in nova then migrate to Gantt. OK, agree with you, considering the spec is freeze now, I will consider this in K or L and find a workaround for now. ;-) Thanks. 2014-07-22 1:13 GMT+08:00 Sylvain Bauza sba...@redhat.com: Le 21/07/2014 17:52, Jay Lau a écrit : Sorry, correct one typo. I mean Promote select_destination as a REST API -1 to it. During last Summit, we agreed on externalizing current Scheduler code into a separate project called Gantt. For that, we agreed on first doing necessary changes within the Scheduler before recreating a new repository. By providing select_destinations as a new API endpoint, it would create a disruptive change where the Scheduler would have a new entrypoint. As this change would need a spec anyway and as there is a Spec Freeze now for Juno, I propose to delay this proposal until Gantt is created and propose a REST API for Gantt instead (in Kilo or L) -Sylvain 2014-07-21 23:49 GMT+08:00 Jay Lau jay.lau@gmail.com: Now in OpenStack Nova, select_destination is used by create/rebuild/migrate/evacuate VM when selecting target host for those operations. There is one requirement that some customers want to get the possible host list when create/rebuild/migrate/evacuate VM so as to create a resource plan for those operations, but currently select_destination is not a REST API, is it possible that we promote this API to be a REST API? -- Thanks, Jay -- Thanks, Jay ___ OpenStack-dev mailing listOpenStack-dev@lists.openstack.orghttp://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev -- Thanks, Jay ___ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
Re: [openstack-dev] [OpenStack][Nova][Scheduler] Promote select_destination as a REST API
On 07/21/2014 07:45 PM, Jay Lau wrote: There is one requirement that some customers want to get the possible host list when create/rebuild/migrate/evacuate VM so as to create a resource plan for those operations, but currently select_destination is not a REST API, is it possible that we promote this API to be a REST API? Which customers want to get the possible host list? /me imagines someone asking Amazon for a REST API that returned all the possible servers that might be picked for placement... and what answer Amazon might give to the request. If by customer, you are referring to something like IBM Smart Cloud Orchestrator, then I don't really see the point of supporting something like this. Such a customer would only need to create a resource plan for those operations if it was wholly supplanting large pieces of OpenStack infrastructure, including parts of Nova and much of Heat. Best, -jay ___ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
Re: [openstack-dev] [OpenStack][Nova][Scheduler] Promote select_destination as a REST API
Hi Jay, There are indeed some China customers want this feature because before they do some operations, they want to check the action plan, such as where the VM will be migrated or created, they want to use some interactive mode do some operations to make sure no errors. Thanks. 2014-07-22 10:23 GMT+08:00 Jay Pipes jaypi...@gmail.com: On 07/21/2014 07:45 PM, Jay Lau wrote: There is one requirement that some customers want to get the possible host list when create/rebuild/migrate/evacuate VM so as to create a resource plan for those operations, but currently select_destination is not a REST API, is it possible that we promote this API to be a REST API? Which customers want to get the possible host list? /me imagines someone asking Amazon for a REST API that returned all the possible servers that might be picked for placement... and what answer Amazon might give to the request. If by customer, you are referring to something like IBM Smart Cloud Orchestrator, then I don't really see the point of supporting something like this. Such a customer would only need to create a resource plan for those operations if it was wholly supplanting large pieces of OpenStack infrastructure, including parts of Nova and much of Heat. Best, -jay ___ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev -- Thanks, Jay ___ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
