** Changed in: neutron
Assignee: Trevor McCasland (twm2016) => (unassigned)
** Changed in: neutron
Status: In Progress => Opinion
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https://bugs.launchpad.net/bugs/1572390
Title:
Scheduling router without external network results in unclear error
Status in neutron:
Opinion
Bug description:
When attempting to schedule a router to an L3 agent without an
external network set, the following error is observed:
root@infra01_neutron_server_container-96ae0d98:~# neutron l3-agent-router-add
7ec8336e-3d82-46f5-8e15-2f2477090021 TestRouter
Agent 7ec8336e-3d82-46f5-8e15-2f2477090021 is not a L3 Agent or has been
disabled
The error could lead users to believe the L3 agent(s) are not alive
when the agent-list clearly shows otherwise:
root@infra01_neutron_server_container-96ae0d98:~# neutron agent-list | grep l3
| 7ec8336e-3d82-46f5-8e15-2f2477090021 | L3 agent |
infra01_neutron_agents_container-4bbf1e68 | :-) | True |
neutron-l3-agent |
| b5d7be19-3143-431e-ac8b-1c8237acaace | L3 agent |
infra02_neutron_agents_container-fb552892 | :-) | True |
neutron-l3-agent |
| e8bed137-6ec3-41d1-a524-3e5e3a884fcd | L3 agent |
infra03_neutron_agents_container-ad2973dd | :-) | True |
neutron-l3-agent |
The test case in get_l3_agent_candidates function in
l3_agentschedulers_db.py tests to see if external_gateway_info is set
and when it isn't, returns zero candidates. As a result, the presented
agent is considered invalid.
The proper workflow appears to be that a gateway must be set before a
router can be scheduled. However, already scheduled routers can have
their gateway cleared with no observed issues and remain scheduled.
It may help to create a new error to represent this failed test case
rather than lumping tests together, or provide additional pointers in
the error message to reflect possible issues other than a disabled or
non-L3 agent.
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