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Propose awsudo as a workaround for kops mfa #2791

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Jul 1, 2017
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Propose awsudo as a workaround for kops mfa #2791

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12 changes: 10 additions & 2 deletions docs/mfa.md
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You can secure `kops` with MFA by creating an AWS role & policy that requires MFA to access to the `KOPS_STATE_STORE` bucket. Unfortunately the Go AWS SDK does not transparently support assuming roles with required MFA. This may change in a future version. `kops` plans to support this behavior eventually. You can track progress in this [Github issue](https://github.com/kubernetes/kops/issues/226). If you'd like to ues MFA with `kops`, you'll need a work around until then.

## The Workaround
## The Workaround #1

The work around uses `aws sts assume-role` in combination with an MFA prompt to retrieve temporary AWS access keys. This provides `AWS_ACCESS_KEY_ID`, `AWS_SECRET_ACCESS_KEY`, and `AWS_SESSION_TOKEN` environment variables which are automatically picked up by Go AWS SDK. You provide the MFA & Role ARNs, then invoke `kops`.

Expand Down Expand Up @@ -55,6 +55,14 @@ main() {
main "$@"
```

## Usage
#### Usage

Download the script as `kops-mfa`, make it executable, put it on `$PATH`, set the `KOPS_MFA_ARN` and `KOPS_MFA_ROLE_ARN` environment variables. Run as `kops-mfa` followed by any `kops` command.


## The Workaround #2
Use [awsudo](https://github.com/makethunder/awsudo) to generate temp credentials. This is similar to previous but shorter:
```
pip install awsudo
env $(awsudo ${AWS_PROFILE} | grep AWS | xargs) kops ...
```