Public bug reported:
Currently in config of metadata agent there is option to set IP address of nova
metadata service (nova_metadata_ip).
There can be situation that there is more than one nova-api service in cluster
and in such case if configured nova metadata IP will return e.g. error 500 then
it will be returned to instance, but there can be situation that all other
nova-api services are working fine and call to other Nova service would return
proper metadata.
So proposition is to change nova_metadata_ip string option to list of IP
addresses and to change metadata agent that it will try to make calls to
one of configured Nova services. If response from this Nova service will
not be 200, than agent will try to make call to next Nova service. If
response from all Nova services will fail, then it will return lowest
error code which will get from Nova (for example Nova-api-1 returned 500
and Nova-api-2 returned 404 - agent will return to VM response 404).
** Affects: neutron
Importance: Undecided
Status: New
** Tags: rfe
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https://bugs.launchpad.net/bugs/1620279
Title:
Allow metadata agent to make calls to more than one nova_metadata_ip
Status in neutron:
New
Bug description:
Currently in config of metadata agent there is option to set IP address of
nova metadata service (nova_metadata_ip).
There can be situation that there is more than one nova-api service in
cluster and in such case if configured nova metadata IP will return e.g. error
500 then it will be returned to instance, but there can be situation that all
other nova-api services are working fine and call to other Nova service would
return proper metadata.
So proposition is to change nova_metadata_ip string option to list of
IP addresses and to change metadata agent that it will try to make
calls to one of configured Nova services. If response from this Nova
service will not be 200, than agent will try to make call to next Nova
service. If response from all Nova services will fail, then it will
return lowest error code which will get from Nova (for example Nova-
api-1 returned 500 and Nova-api-2 returned 404 - agent will return to
VM response 404).
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