# Revision history [back]

### How do nova-cells really works?

I'm trying to do some testing with nova-cells, however, whenever I try to deploy a new instance It goes to scheduling state and it never goes any further. I've been trying to find how nova-cells works and what are the interactions between components just to figure out where I'm going wrong, but the only thing I find is the "basic configurations". Is there something more profound about nova-cells?

Thank you in advance. José Ignacio.

 2 retagged smaffulli 6981 ●38 ●68 ●102 http://maffulli.net/

### How do nova-cells really works?

I'm trying to do some testing with nova-cells, however, whenever I try to deploy a new instance It goes to scheduling state and it never goes any further. I've been trying to find how nova-cells works and what are the interactions between components just to figure out where I'm going wrong, but the only thing I find is the "basic configurations". Is there something more profound about nova-cells?

Thank you in advance. José Ignacio.

### How do nova-cells really works?

I'm trying to do some testing with nova-cells, however, whenever I try to deploy a new instance It goes to scheduling state and it never goes any further. further.

In one host (172.30.8.203) I've installed nova-api, nova-cells and nova-conductor: Binary Host Zone Status State Updated_At nova-conductor havana-novaController internal enabled :-) 2014-02-28 10:42:53 nova-cells havana-novaController internal enabled :-) 2014-02-28 10:42:54 nova-cert havana-novaController internal enabled :-) 2014-02-28 10:42:53

In another host (172.30.8.210) I've installed (appart from rabbitmq) nova-conductor havana-compute-1 internal enabled :-) 2014-02-28 10:45:35 nova-cert havana-compute-1 internal enabled :-) 2014-02-28 10:45:30 nova-scheduler havana-compute-1 internal enabled :-) 2014-02-28 10:45:35 nova-compute havana-compute-1 nova enabled :-) 2014-02-28 10:45:35 nova-cells havana-compute-1 internal enabled :-) 2014-02-28 10:45:28

I've defined the cells: Id Name Type Username Hostname Port VHost
--- ---------- ------ ------------ --------------- ----- ---------- 5 cell1 child guest 172.30.8.210 5672 None
--- ---------- ------ ------------ --------------- ----- ----------

And (yes, RabbitMQ is there for API). Id Name Type Username Hostname Port VHost
--- ---------- ------ ------------ --------------- ----- ---------- 5 api parent guest 172.30.8.205 5672 None
--- ---------- ------ ------------ --------------- ----- ----------

When I start the nova-cells services, I can see it connects to the other cell rabbitMQ for a moment, but it stays unconnected most of the time. (Is this the way it should work?)

I try to deploy a new instance and the API starNo error-logs are shown. The API queries glance for the image ID, neutron for the network id, everything goes well... But it stops. There's no communication between cells, no messages to AMQP, no error logs, nothing... but the instance goes to "BUILD/scheduling" state and it never moves to another state.

I've been trying to find figure out how nova-cells works and what are the interactions between components just to figure out where I'm going wrong, understand how this should go forward, but the only thing fact is that I haven't find is the "basic configurations". Is there anything helpful.

I'd like to find something more profound about nova-cells?nova-cells than the basic configurations I've found in order to understand this technology better.

So, any help would be very welcome.

Thank you in advance. José Ignacio.

### How do nova-cells really works?

I'm trying to do some testing with nova-cells, however, whenever I try to deploy a new instance It goes to scheduling state and it never goes any further.

In one host (172.30.8.203) I've installed nova-api, nova-cells and nova-conductor: Binary Host Zone Status State Updated_At nova-conductor havana-novaController internal enabled :-) 2014-02-28 10:42:53 nova-cells havana-novaController internal enabled :-) 2014-02-28 10:42:54 nova-cert havana-novaController internal enabled :-) 2014-02-28 10:42:53

In another host (172.30.8.210) I've installed (appart from rabbitmq) nova-conductor havana-compute-1 internal enabled :-) 2014-02-28 10:45:35 nova-cert havana-compute-1 internal enabled :-) 2014-02-28 10:45:30 nova-scheduler havana-compute-1 internal enabled :-) 2014-02-28 10:45:35 nova-compute havana-compute-1 nova enabled :-) 2014-02-28 10:45:35 nova-cells havana-compute-1 internal enabled :-) 2014-02-28 10:45:28

I've defined the cells: cells:

 Id   Name        Type    Username    Hostname        Port   VHost   ---  ----------   ------    ------------ ----------  ---------------   -----   ----------
5   cell1        child   api         parent  guest          172.30.8.210 172.30.8.205     5672   None   ---  ----------   ------   ------------  ----------  ---------------   -----   --------------------


And (yes, RabbitMQ is there for API). API).

 Id   Name        Type    Username    Hostname       Port   VHost   ---  ----------   ------    ------------ ----------  ---------------   -----   ----------
5   api          parent   guest       172.30.8.205    5672   None   ---  ----------   ------    ------------ ----------  ---------------   -----   --------------------


When I start the nova-cells services, I can see it connects to the other cell rabbitMQ for a moment, but it stays unconnected most of the time. (Is this the way it should work?)

I try to deploy a new instance and the API starNo error-logs are shown. The API queries glance for the image ID, neutron for the network id, everything goes well... But it stops. There's no communication between cells, no messages to AMQP, no error logs, nothing... but the instance goes to "BUILD/scheduling" state and it never moves to another state.

I've been trying to figure out how nova-cells works and understand how this should go forward, but the fact is that I haven't find anything helpful.

I'd like to find something more profound about nova-cells than the basic configurations I've found in order to understand this technology better.

So, any help would be very welcome.

Thank you in advance. José Ignacio.