393b20204b
Simulating workloads with the fake driver currently misses the reality
that some operations take time to complete, rather than occuring
instantly. This makes it difficult to mock real workloads for
performance and functional testing of ironic itself.
This change adds configurable random wait times for fake drivers in a
new ironic.conf [fake] section. Each supported driver having one
configuration option controlling the delay. These delays are applied
to operations which typically block in other drivers.
The default value of zero continues the existing behaviour of no
delay. A single integer value will result in a constant delay in
seconds. Two values separated by a comma will result in a triangular
distribution weighted by the first value, specifically in python[1]:
random.triangular(a, b, a)
Change-Id: I7cb1b50d035939e6c4538b3373002a309bfedea4
[1] https://docs.python.org/3/library/random.html#random.triangular
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