Chase has identified that Nodepool causes an anomalous rate of queries to the OpenStack API. A low hanging fruit is requesting the list of floating IP for the tenant which we do not need at all T143943.
I have made a patch that shortcircuit the code.
We will want to upgrade Nodepool to 0.1.1-wmf5 which includes it.
Packages build and published at:
Will want to do the upgrade during CI low traffic hours (eg when SF is not awake yet).