fix(aws): check endpoint for nil before using in aws provider

[mat285]

Description

Check endpoints for nil to ensure they are valid before use in AWS provider

Fixes https://github.com/kubernetes-sigs/external-dns/issues/4176

Checklist

• [x] Unit tests updated
• [x] End user documentation updated

[linux-foundation-easycla[bot]]

The committers listed above are authorized under a signed CLA.

• :white_check_mark: login: mat285 / name: Michael Turner (027c83dba74faa8b1f897cbbe4f94a6a335529fd, 999c7ae4a04c2edc766cc07ab349c0f69f980c4a)

[k8s-ci-robot]

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[k8s-ci-robot]

Hi @mat285. Thanks for your PR.

I'm waiting for a kubernetes-sigs 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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[mat285]

@johngmyers @mloiseleur @Raffo @szuecs sorry to bother yall but whenever you have time would love some feedback/review on this fix

[mloiseleur]

@mat285 No PR are reviewed or merged without test.

BTW, as the dns hostname is limited to 63 characters, wdyt of returning a SoftError (and so log it) ?

[mat285]

@mat285 No PR are reviewed or merged without test.

BTW, as the dns hostname is limited to 63 characters, wdyt of returning a SoftError (and so log it) ?

Thanks for the response, added a test to aws records test. This happens when the dns name has chars outside of the normal ones (I ran into it with a record containing a ~) that get encoded into strings longer than 63 chars. I'm good with returning a softerror and logging instead of just doing a nil check everywhere

[k8s-ci-robot]

PR needs rebase.

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/lifecycle stale

[mloiseleur]

/ok-to-test @mat285 Do you think you can rebase this PR ?

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/lifecycle rotten

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/close

[k8s-ci-robot]

@k8s-triage-robot: Closed this PR.

In response to this:

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/close

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