I have read http://docs.fabfile.org/en/1.6/usage/parallel.html and many
threads on this topic, but I thought I'd try in my own way to phrase
what I believe must be a common situation for many people.
Short version:
For simplicity, imagine a case with 3 VZ containers that I am trying to
provision on the same container host. Right now I have to start 3
terminals, and I execute in each one of them:
fab -H host --name container-1 --index 1 --mode prod --user jdoe
fab -H host --name container-2 --index 2 --mode prod --user jdoe
fab -H host --name container-3 --index 3 --mode prod --user jdoe
I would much rather execute something like:
fab -H host -P --name container-1, container-2,container-3 --index 1,2,3
--mode prod --user jdoe
And have fab auto-magically map that one-liner to the 3 commands above
and run them in parallel. That *seems* like a reasonable request, but I
just can't find a way to make that happen. It is important enough for
my work that I'd be willing to write some @map decorator or similar to
facilitate an implementation.
For a few more details, each container creation takes ~15 minutes. They
parallelize almost perfectly, so rather than waiting 5 hours for 20
containers to all come up serially (20 x 15 minutes), I'd rather wait 15
minutes. There are some slight parameter differences for each
container. Right now I need to start 20 terminal sessions and execute
20 slightly different commands. Error prone!
TIA
Ian
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