Upgrade aws-sdk-go for IRSA

[anarcher]

Fixes #68

Update go.mod for upgrading AWS SDK[1] for IRSA
IRSA can then provide AWS permissions to the instance-manager controller pod that uses that service account. :-)

[1] https://docs.aws.amazon.com/eks/latest/userguide/iam-roles-for-service-accounts-minimum-sdk.html

I think the controller works well with upgrading aws-sdk-go

time="2019-12-05T16:22:43Z" level=info msg="reconcile started"
time="2019-12-05T16:22:43Z" level=info msg="resource document version: 12214434"
time="2019-12-05T16:22:43Z" level=info msg="resource namespace: addon-instance-manager"
time="2019-12-05T16:22:43Z" level=info msg="resource name: hello-world"
time="2019-12-05T16:22:43Z" level=info msg="resource provisioner: eks-cf"
time="2019-12-05T16:22:43Z" level=info msg="upgrade strategy: rollingupdate"

[claassistantio]

All committers have signed the CLA.

[codecov]

Codecov Report

Merging #67 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #67   +/-   ##
=======================================
  Coverage   73.09%   73.09%           
=======================================
  Files           6        6           
  Lines         825      825           
=======================================
  Hits          603      603           
  Misses        162      162           
  Partials       60       60

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[eytan-avisror]

Thanks for the PR!

This change should be well tested before merging.
We've already hit this bug:
aws/aws-sdk-go#2972

in upgrade manager we had to roll this back:
keikoproj/upgrade-manager#31

Did you get a chance to test full reconciles with this new SDK version?

[anarcher]

Thanks for the review! Oh, I haven't known the issue (aws/aws-sdk-go#2972). With [email protected] and IRSA, The reconciling work well. But I'm not sure that the slow issue is existed or not. ㅠ_ㅠ

Like the upgrade-manager, I will change to [email protected]. :->

$k get ig
NAME          STATE   MIN   MAX   GROUP NAME                   PROVISIONER   STRATEGY        LIFECYCLE   AGE
hello-world   Ready   1     1     dev-hello-world-NodeGroup-   eks-cf        rollingUpdate   normal      10h

time="2019-12-06T02:05:28Z" level=info msg="reconcile started"
time="2019-12-06T02:05:28Z" level=info msg="resource document version: 12219322"
time="2019-12-06T02:05:28Z" level=info msg="resource namespace: addon-instance-manager"
time="2019-12-06T02:05:28Z" level=info msg="resource name: hello-world"
time="2019-12-06T02:05:28Z" level=info msg="resource provisioner: eks-cf"
time="2019-12-06T02:05:28Z" level=info msg="upgrade strategy: rollingupdate"
time="2019-12-06T02:05:49Z" level=info msg="state transitioned to: Init"
time="2019-12-06T02:05:49Z" level=info msg="starting cloud discovery"
time="2019-12-06T02:05:49Z" level=info msg="stack state: CREATE_COMPLETE"
time="2019-12-06T02:05:49Z" level=info msg="starting state discovery"
time="2019-12-06T02:05:49Z" level=info msg="state transitioned to: InitUpdate"
time="2019-12-06T02:05:49Z" level=info msg="starting update"
time="2019-12-06T02:05:50Z" level=info msg="update not required"
time="2019-12-06T02:05:50Z" level=info msg="state transitioned to: ReconcileModified"
time="2019-12-06T02:05:50Z" level=info msg="stack state: CREATE_COMPLETE"
time="2019-12-06T02:05:50Z" level=info msg="starting bootstrap"
time="2019-12-06T02:05:50Z" level=info msg="state transitioned to: Ready"
time="2019-12-06T02:05:50Z" level=info msg="reconcile completed"
2019-12-06T02:05:50.902Z	DEBUG	controller-runtime.controller	Successfully Reconciled	{"controller": "instancegroup", "request": "addon-instance-manager/hello-world"}

[eytan-avisror]

Looks good! Thanks for adding this.