[1.11-38] 'No more IP addresses available on network' Error seen on creating a router-interface, when allocation pool is specified without a gateway

[Ganesha HV]

1]. Created a net and a associated subnet, specifying a allocation pool:
root@nodea26:/opt/contrail/utils# neutron net-create vrrp-net
Created a new network:
+-------------------------+--------------------------------------+
| Field | Value |
+-------------------------+--------------------------------------+
| admin_state_up | True |
| contrail:fq_name | default-domain |
| | admin |
| | vrrp-net |
| contrail:instance_count | 0 |
| id | 57a746b5-835a-46b9-912f-59366fb2c00c |
| name | vrrp-net |
| router:external | False |
| shared | False |
| status | ACTIVE |
| subnets | |
| tenant_id | 5e8a0337d4fa4efaa41f5cdff84b2109 |
+-------------------------+--------------------------------------+
root@nodea26:/opt/contrail/utils# neutron subnet-create --name vrrp-subnet --allocation-pool start=10.0.0.2,end=10.0.0.200 vrrp-net 10.0.0.0/24
Created a new subnet:
+------------------+--------------------------------------------+
| Field | Value |
+------------------+--------------------------------------------+
| allocation_pools | {"start": "10.0.0.2", "end": "10.0.0.200"} |
| cidr | 10.0.0.0/24 |
| dns_nameservers | |
| enable_dhcp | True |
| gateway_ip | 10.0.0.1 |
| host_routes | |
| id | 180282ca-0df1-4a4a-8f25-580886a451bc |
| ip_version | 4 |
| name | vrrp-subnet |
| network_id | 57a746b5-835a-46b9-912f-59366fb2c00c |
| tenant_id | 5e8a0337d4fa4efaa41f5cdff84b2109 |
+------------------+--------------------------------------------+
2]. Created a router and tried to add a interface to it:
root@nodea26:/opt/contrail/utils# neutron router-create router1
Created a new router:
+-----------------------+--------------------------------------+
| Field | Value |
+-----------------------+--------------------------------------+
| admin_state_up | True |
| contrail:fq_name | default-domain |
| | admin |
| | router1 |
| external_gateway_info | |
| id | 94d24489-86d8-4a91-b40a-5683a39964a0 |
| name | router1 |
| status | ACTIVE |
| tenant_id | 5e8a0337d4fa4efaa41f5cdff84b2109 |
+-----------------------+--------------------------------------+
root@nodea26:/opt/contrail/utils# neutron router-interface-add router1 vrrp-subnet
409-{u'NeutronError': {u'message': u'No more IP addresses available on network 57a746b5-835a-46b9-912f-59366fb2c00c.', u'type': u'ContrailConflictError', u'detail': u''}}

3]. The same error is seen when we start the allocation pool from a different address other than .2 and a gateway is specified too:

root@nodea26:/opt/contrail/utils# neutron net-create hvg1
Created a new network:
+-------------------------+--------------------------------------+
| Field | Value |
+-------------------------+--------------------------------------+
| admin_state_up | True |
| contrail:fq_name | default-domain |
| | admin |
| | hvg1 |
| contrail:instance_count | 0 |
| id | 1f6390f9-034d-42b3-ab45-c3a5a2af1fef |
| name | hvg1 |
| router:external | False |
| shared | False |
| status | ACTIVE |
| subnets | |
| tenant_id | 5e8a0337d4fa4efaa41f5cdff84b2109 |
+-------------------------+--------------------------------------+
root@nodea26:/opt/contrail/utils# neutron subnet-create --name hvg1 --allocation-pool start=30.0.0.3,end=30.0.0.200 --gateway=30.0.0.1 hvg1 30.0.0.0/24
Created a new subnet:
+------------------+--------------------------------------------+
| Field | Value |
+------------------+--------------------------------------------+
| allocation_pools | {"start": "30.0.0.3", "end": "30.0.0.200"} |
| cidr | 30.0.0.0/24 |
| dns_nameservers | |
| enable_dhcp | True |
| gateway_ip | 30.0.0.1 |
| host_routes | |
| id | 962e2ed6-59b2-465d-9882-83c353415ed0 |
| ip_version | 4 |
| name | hvg1 |
| network_id | 1f6390f9-034d-42b3-ab45-c3a5a2af1fef |
| tenant_id | 5e8a0337d4fa4efaa41f5cdff84b2109 |
+------------------+--------------------------------------------+
root@nodea26:/opt/contrail/utils# neutron router-create router123
Created a new router:
+-----------------------+--------------------------------------+
| Field | Value |
+-----------------------+--------------------------------------+
| admin_state_up | True |
| contrail:fq_name | default-domain |
| | admin |
| | router123 |
| external_gateway_info | |
| id | b35ad36c-5c86-4469-91a8-26790023fa7f |
| name | router123 |
| status | ACTIVE |
| tenant_id | 5e8a0337d4fa4efaa41f5cdff84b2109 |
+-----------------------+--------------------------------------+
root@nodea26:/opt/contrail/utils# neutron router-interface-add router123 hvg1
409-{u'NeutronError': {u'message': u'No more IP addresses available on network 1f6390f9-034d-42b3-ab45-c3a5a2af1fef.', u'type': u'ContrailConflictError', u'detail': u''}}
root@nodea26:/opt/contrail/utils#

Shown to Prakash.

[Sachin Bansal (sbansal)]

Could you please confirm the behavior on stock devstack?

[Vedamurthy Joshi (vedujoshi)]

Sachin, why do we need to compare in this case? Gateway is always outside of allocation pool

[Vedamurthy Joshi (vedujoshi)]

Verified on openvswitch...it works as expected

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/3032
Committed: http://github.org/Juniper/contrail-controller/commit/aad6d3ed51f1c97fde9403f893b59011aacf4a85
Submitter: Zuul
Branch: master

commit aad6d3ed51f1c97fde9403f893b59011aacf4a85
Author: Sachin Bansal <email address hidden>
Date: Tue Sep 23 10:24:52 2014 -0700

Do not try to reserve the address if it is same as gateway ip. Gateway ip is already reserved at the time of subnet creation.

Change-Id: Id763db6d20620dd820443ffb619c0fb66c0b8190
Closes-Bug: 1372384

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/3033
Committed: http://github.org/Juniper/contrail-controller/commit/4fb15fc3a6eb2d140ba22bd5a5239501b1ae07cb
Submitter: Zuul
Branch: R1.10

commit 4fb15fc3a6eb2d140ba22bd5a5239501b1ae07cb
Author: Sachin Bansal <email address hidden>
Date: Tue Sep 23 10:24:52 2014 -0700

Do not try to reserve the address if it is same as gateway ip. Gateway ip is already reserved at the time of subnet creation.

Change-Id: Id763db6d20620dd820443ffb619c0fb66c0b8190
Closes-Bug: 1372384
(cherry picked from commit aad6d3ed51f1c97fde9403f893b59011aacf4a85)