Resource Controller

[chungers]

This PR

• introduces a new resource controller which manages a collection of instance plugins to provision named resources (e.g. networks, gateways, volumes)
• manages lifecycle and dependencies of resources
• implements finite state machine FSM models for generic resources from requested to provisioning to ready states. FSM will reconcile and re-provision if resources are lost.
• will be used to provide Cloudformation-like creation of entire cluster from vpc to networks to gateways and security groups; complements the group controller which manages machines in the same environment.

See the README.md in docs/controller/resource/README.md for details.

Signed-off-by: David Chung david.chung@docker.com

[codecov[bot]]

Codecov Report

Merging #880 into master will decrease coverage by 0.01%. The diff coverage is 43.39%.

@@            Coverage Diff            @@
##           master    #880      +/-   ##
=========================================
- Coverage   48.41%   48.4%   -0.02%     
=========================================
  Files          84      85       +1     
  Lines        7698    7741      +43     
=========================================
+ Hits         3727    3747      +20     
- Misses       3671    3691      +20     
- Partials      300     303       +3

Impacted Files	Coverage Δ
pkg/template/funcs.go	62.97% <0%> (-0.49%)	:arrow_down:
pkg/spi/event/types.go	59.52% <20%> (-4.58%)	:arrow_down:
pkg/spi/controller/singleton.go	42.42% <42.42%> (ø)
pkg/types/link.go	93.93% <50%> (-6.07%)	:arrow_down:
pkg/types/path.go	84.92% <80%> (-0.12%)	:arrow_down:
pkg/rpc/mux/server.go	47.91% <0%> (+5.2%)	:arrow_up:

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[GordonTheTurtle]

Please sign your commits following these rules: https://github.com/moby/moby/blob/master/CONTRIBUTING.md#sign-your-work The easiest way to do this is to amend the last commit:

$ git clone -b "resource-controller" git@github.com:chungers/infrakit.git somewhere
$ cd somewhere
$ git rebase -i HEAD~842354172632
editor opens
change each 'pick' to 'edit'
save the file and quit
$ git commit --amend -s --no-edit
$ git rebase --continue # and repeat the amend for each commit
$ git push -f

Amending updates the existing PR. You DO NOT need to open a new one.