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Enable use of existing subnets #305

merged 4 commits into from Nov 7, 2018


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commented Nov 6, 2018


This should sufficient to close #42 . As discussed in #303, there will be more logical features to add, but this should enable most folks.

This adds --vpc-{private,public}-subnets flags. It's entirely up to the user which ones they specify as private or public. This is very clearly defined in #303, but we need to come up with a concise statement to put in the docs. We also have a waning message now, to make sure we don't get too many bug reports because of bad VPC configurations, but we still need to make it crystal clear in the docs.


  • Code compiles correctly (i.e make build)
  • All tests passing (i.e. make test)
  • Added/modified documentation as required (such as the README)

@errordeveloper errordeveloper requested a review from richardcase Nov 6, 2018

@errordeveloper errordeveloper force-pushed the subnets branch 2 times, most recently from 9632225 to 3e4c6d6 Nov 6, 2018

@errordeveloper errordeveloper requested a review from christopherhein Nov 6, 2018

Add `--vpc-{private,public}-subnets` flags
- refactor conditional logic for readability
- add more flag compatibility validation
- print warning to ensure that configuring the
  VPC and subnets is user's responsibility

for _, subnet := range output.Subnets {
if c.Spec.VPC.ID == "" {
c.Spec.VPC.ID = *subnet.VpcId

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errordeveloper Nov 7, 2018

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Also need to get the CIDR for the VPC (as DNS IP depends on this), and we already have them for each of the subnets too (so might as well set them here).

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This looks good to be. I wonder if we need to think about refactoring (in general) in the future to start reducing the size of functions to make it cleaner and less complex.


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commented Nov 7, 2018

@errordeveloper errordeveloper changed the title WIP: Enable use of existing subnets Enable use of existing subnets Nov 7, 2018

@errordeveloper errordeveloper merged commit e3b8ecb into master Nov 7, 2018

3 checks passed

GolangCI No issues found!
WIP Ready for review
ci/circleci: make-eksctl-image Your tests passed on CircleCI!

@errordeveloper errordeveloper deleted the subnets branch Nov 7, 2018


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commented Nov 7, 2018

Having said that, maybe a good idea to go with a follow-up PR rather then jamming everything into this one.

I'd agree, generally a good idea.

errordeveloper added a commit that referenced this pull request Nov 9, 2018
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