Issuer with IRSA needs ambient credentials flag

[rossigee]

This should help reduce the amount of time people might waste trying to figure out how to resolve the following error:

error instantiating route53 challenge solver: unable to construct route53 provider: empty credentials; perhaps you meant to enable ambient credentials?

A couple of related bug reports:

• https://github.com/jetstack/cert-manager/issues/3009
• https://github.com/jetstack/cert-manager/issues/3079

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[jetstack-bot]

Hi @rossigee. Thanks for your PR.

I'm waiting for a cert-manager member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[rossigee]

/assign @meyskens

[tstraley]

I'm curious if any of the maintainers can chime in here with why the Issuer and ClusterIssuer have different functionality here? Shouldn't either one be trying to use the modern AWS SDK to its full extent and collecting credentials from all supported sources?

[wallrj]

/ok-to-test

[wallrj]

I'm curious if any of the maintainers can chime in here with why the Issuer and ClusterIssuer have different functionality here? Shouldn't either one be trying to use the modern AWS SDK to its full extent and collecting credentials from all supported sources?

I found the answer in a document which we obviously forgot to port over to the new website:

https://github.com/jetstack/cert-manager/blob/95883c47dd31ad6c0e7652a192e4c51981d67592/docs/user-guides/ambient-credentials.md?plain=1#L33-L46

## When are Ambient Credentials used


Ambient credentials are supported for the 'route53' ACME dns01 provider.


They will only be used if no credentials are supplied, even if the supplied credentials are incorrect.


By default, they may be used by ClusterIssuers, but not regular issuers. The
`--issuer-ambient-credentials` and
`--cluster-issuer-ambient-credentials=false` flags on the cert-manager may be
used to override this behavior.


Note that ambient credentials are disabled for regular Issuers by default to
ensure unprivileged users who may create issuers cannot issue certificates
using any credentials cert-manager incidentally has access to.

So I suggest we add that to the current docs

[jetstack-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: rossigee To complete the pull request process, please assign maelvls after the PR has been reviewed. You can assign the PR to them by writing /assign @maelvls in a comment when ready.

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[jetstack-bot]

Thanks for your pull request. Before we can look at it, you'll need to add a 'DCO signoff' to your commits.

:memo: Please follow instructions in the contributing guide to update your commits with the DCO

Full details of the Developer Certificate of Origin can be found at developercertificate.org.

The list of commits missing DCO signoff:

• 8775d48 Issuer with IRSA needs ambient credentials flag
• f855dce Re-use existing documentation describing ambient credentials for non-cluster Issuers.

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[jetstack-bot]

@rossigee: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-cert-manager-website-verify	f855dce2c8862e739e8f9520e3158f3a036f234c	link	true	/test pull-cert-manager-website-verify

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[cert-manager-prow[bot]]

PR needs rebase.

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