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Message #71655
[Bug 1754062] Re: openstack client does not pass prefixlen when creating subnet
Reviewed: https://review.openstack.org/550588
Committed: https://git.openstack.org/cgit/openstack/neutron-lib/commit/?id=ce10b9df28ece6daee1f199740b672aae707630b
Submitter: Zuul
Branch: master
commit ce10b9df28ece6daee1f199740b672aae707630b
Author: Brian Haley <bhaley@xxxxxxxxxx>
Date: Wed Mar 7 15:08:42 2018 -0500
Add prefixlen to subnet api-ref for create actions
Prefixlen is used in subnet creation when allocating a subnet
from a subnet pool.
Change-Id: I251944ca15434ed9b17deb829cca985cd94a0bd1
Closes-bug: #1754062
** Changed in: neutron
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/1754062
Title:
openstack client does not pass prefixlen when creating subnet
Status in neutron:
Fix Released
Status in OpenStack SDK:
New
Bug description:
Version: Pike
OpenStack Client: 3.12.0
When testing Subnet Pool functionality, I found that the behavior
between the openstack and neutron clients is different.
Subnet pool:
root@controller01:~# openstack subnet pool show MySubnetPool
+-------------------+--------------------------------------+
| Field | Value |
+-------------------+--------------------------------------+
| address_scope_id | None |
| created_at | 2018-03-07T13:18:22Z |
| default_prefixlen | 8 |
| default_quota | None |
| description | |
| id | e49703d8-27f4-4a16-9bf4-91a6cf00fff3 |
| ip_version | 4 |
| is_default | False |
| max_prefixlen | 32 |
| min_prefixlen | 8 |
| name | MySubnetPool |
| prefixes | 172.31.0.0/16 |
| project_id | 9233b6b4f6a54386af63c0a7b8f043c2 |
| revision_number | 0 |
| shared | False |
| tags | |
| updated_at | 2018-03-07T13:18:22Z |
+-------------------+--------------------------------------+
When attempting to create a /28 subnet from that pool with the
openstack client, the following error is observed:
root@controller01:~# openstack subnet create \
> --subnet-pool MySubnetPool \
> --prefix-length 28 \
> --network MyVLANNetwork2 \
> MyFlatSubnetFromPool
HttpException: Internal Server Error (HTTP 500) (Request-ID: req-61b3f00a-9764-4bcb-899d-e85d66f54e5a), Failed to allocate subnet: Insufficient prefix space to allocate subnet size /8.
However, the same request is successful with the neutron client:
root@controller01:~# neutron subnet-create --subnetpool MySubnetPool --prefixlen 28 --name MySubnetFromPool MyVLANNetwork2
neutron CLI is deprecated and will be removed in the future. Use openstack CLI instead.
Created a new subnet:
+-------------------+-----------------------------------------------+
| Field | Value |
+-------------------+-----------------------------------------------+
| allocation_pools | {"start": "172.31.0.2", "end": "172.31.0.14"} |
| cidr | 172.31.0.0/28 |
| created_at | 2018-03-07T13:35:35Z |
| description | |
| dns_nameservers | |
| enable_dhcp | True |
| gateway_ip | 172.31.0.1 |
| host_routes | |
| id | 43cb9dda-1b7e-436d-9dc1-5312866a1b63 |
| ip_version | 4 |
| ipv6_address_mode | |
| ipv6_ra_mode | |
| name | MySubnetFromPool |
| network_id | e01ca743-607c-4a94-9176-b572a46fba84 |
| project_id | 9233b6b4f6a54386af63c0a7b8f043c2 |
| revision_number | 0 |
| service_types | |
| subnetpool_id | e49703d8-27f4-4a16-9bf4-91a6cf00fff3 |
| tags | |
| tenant_id | 9233b6b4f6a54386af63c0a7b8f043c2 |
| updated_at | 2018-03-07T13:35:35Z |
+-------------------+-----------------------------------------------+
The payload is different between these clients - the openstack client
fails to send the prefixlen key.
openstack client:
REQ: curl -g -i -X POST http://controller01:9696/v2.0/subnets -H "User-Agent: openstacksdk/0.9.17 keystoneauth1/3.1.0 python-requests/2.18.1 CPython/2.7.12" -H "Content-Type: application/json" -H "X-Auth-Token: {SHA1}ec04a71699eee2c70dc4abb35037de272523fef0" -d '{"subnet": {"network_id": "e01ca743-607c-4a94-9176-b572a46fba84", "ip_version": 4, "name": "MyFlatSubnetFromPool", "subnetpool_id": "e49703d8-27f4-4a16-9bf4-91a6cf00fff3"}}'
http://controller01:9696 "POST /v2.0/subnets HTTP/1.1" 500 160
neutron client:
REQ: curl -g -i -X POST http://controller01:9696/v2.0/subnets -H
"User-Agent: python-neutronclient" -H "Content-Type: application/json"
-H "Accept: application/json" -H "X-Auth-Token:
{SHA1}b3b6f0fa14c2b28c5c9784f857ee753455c1d375" -d '{"subnet":
{"network_id": "e01ca743-607c-4a94-9176-b572a46fba84", "prefixlen":
"28", "ip_version": 4, "subnetpool_id":
"e49703d8-27f4-4a16-9bf4-91a6cf00fff3", "name": "MySubnetFromPool"}}'
This appears to stem from prefixlen missing as a query parameter and
property in the python-openstacksdk here:
https://github.com/openstack/python-openstacksdk/blob/master/openstack/network/v2/subnet.py#L32
https://github.com/openstack/python-openstacksdk/blob/master/openstack/network/v2/subnet.py#L43
The Neutron docs do not show prefixlen as a subnet as a valid
property, which could be why:
https://developer.openstack.org/api-ref/network/v2/index.html#create-
subnet
I was able to patch the openstack SDK in my environment and got the
client to work. Please let me know if you have any questions!
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References
