When openstack creates a virtual machine, it reports an error: Failed to allocate the network(s), not rescheduling.].

Error: Instance "test-gtj" failed to perform the requested operation, the instance is in an error state. : Please try again later [Error: Build of instance 5ea8c935-ee07-4788-823f-10e2b003ca89 aborted: Failed to allocate the network(s), not rescheduling.].

Solution:

Modify on the computing node of nova:

/etc/nova/nova.conf

 

1. #Fail instance boot if vif plugging fails  
2. vif_plugging_is_fatal = False  
3.   
4. #Number of seconds to wait for neutron vif  
5. #plugging events to arrive before continuing or failing  
6. #(see vif_plugging_is_fatal). If this is set to zero and  
7. #vif_plugging_is_fatal is False, events should not be expected to arrive at all.  
8. vif_plugging_timeout = 0  

[root@linux-node2 ~]# systemctl restart openstack-nova-compute.service